Make sickdays (in kuhyx/utils) text-free (textgat…

Todo: 2d0704cd

.github/workflows/focus-project-precommit.yml

@@ -0,0 +1,73 @@
+name: focus-project pre-commit
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as focus_project: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['focus_project/**', '.github/workflows/focus-project-precommit.yml']
+  pull_request:
+    branches: [main]
+    paths: ['focus_project/**', '.github/workflows/focus-project-precommit.yml']
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      # Only pre-commit itself. Every linting hook runs in its own isolated
+      # env -- ruff, mypy, pylint, bandit and codespell each come from their
+      # own repo+rev, and the local hooks need nothing beyond bash and
+      # python3 -- so installing the full requirements.txt spent 9s a run on
+      # packages no pre-commit-stage hook imports. Verified by running all
+      # three configs green in a venv holding pre-commit and nothing else.
+      # The pin is read out of requirements.txt rather than repeated here, so
+      # it cannot drift from what the dependency-freshness gate governs.
+      - name: Install pre-commit
+        run: |
+          pip install "$(grep '^pre-commit==' focus_project/requirements.txt)"
+
+      # Keyed on THIS package's config. pre-commit/action@v3.0.1 caches on
+      # hashFiles('.pre-commit-config.yaml') -- the repo ROOT's -- so all three
+      # package jobs shared one key, raced to overwrite it with hook sets built
+      # from four different configs, and editing a per-package config did not
+      # invalidate it. The cache was therefore silently wrong rather than
+      # missing, and the hooks reinstalled from scratch on every run (38-49s).
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pre-commit
+          key: >-
+            pre-commit-focus-project-${{ env.pythonLocation }}-${{
+            hashFiles('focus_project/.pre-commit-config.yaml') }}
+          # Prefix fallback, or this fix would evaporate on the very
+          # event that motivated it: bumping a hook rev changes the
+          # exact key, and a total miss means reinstalling every hook
+          # again. pre-commit's store is keyed internally by hook
+          # repo+rev, so a superseded entry is ignored disk rather
+          # than a wrong hook, and cache still re-saves under the new
+          # exact key after a prefix-only hit.
+          restore-keys: pre-commit-focus-project-${{ env.pythonLocation }}-
+      # mypy re-analyses the stdlib and every third-party stub from scratch
+      # without this, which measured 10s of the hook step in CI against 0.25s
+      # warm locally -- a 19MB cache dir does the whole difference. Keyed on
+      # the config, not the sources: mypy's own cache metadata records the
+      # interpreter, the flag set and a hash per source file, so it re-checks
+      # what changed and cannot pass stale code. Deliberately NOT keyed on
+      # github.sha -- that re-saves 19MB x3 every commit and would evict the
+      # 68MB hook caches under the repo's 10GB LRU budget. A fixed key keeps
+      # the expensive part, the dependency analysis, which is what costs 10s.
+      - uses: actions/cache@v4
+        with:
+          path: .mypy_cache
+          key: >-
+            mypy-focus-project-${{ env.pythonLocation }}-${{
+            hashFiles('focus_project/.pre-commit-config.yaml') }}
+          restore-keys: mypy-focus-project-${{ env.pythonLocation }}-
+      - name: Run the hooks
+        run: >-
+          pre-commit run --config focus_project/.pre-commit-config.yaml
+          --all-files --show-diff-on-failure

.github/workflows/focus-project-tests.yml

@@ -0,0 +1,34 @@
+name: focus-project tests
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as focus_project: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['focus_project/**', '.github/workflows/focus-project-tests.yml']
+  pull_request:
+    branches: [main]
+    paths: ['focus_project/**', '.github/workflows/focus-project-tests.yml']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: focus_project
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+          cache: pip
+          cache-dependency-path: focus_project/requirements.txt
+
+      - name: Install dependencies
+        run: pip install -r requirements.txt && pip install --no-deps -e .
+
+      - name: Run tests with coverage
+        run: python -m pytest -v

.github/workflows/google-account-token-tests.yml

@@ -0,0 +1,36 @@
+name: google_account_token tests
+
+on:
+  push:
+    branches: [main]
+    paths: ['google_account_token/**']
+  pull_request:
+    branches: [main]
+    paths: ['google_account_token/**']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: google_account_token
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+
+      - name: Install dependencies
+        run: flutter pub get
+
+      - name: Analyze
+        run: flutter analyze
+
+      - name: Run tests with coverage
+        run: flutter test --coverage
+
+      - name: Enforce 100% line coverage
+        run: scripts/check_coverage.sh coverage/lcov.info 100

.github/workflows/holds-precommit.yml

@@ -0,0 +1,73 @@
+name: holds pre-commit
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as holds: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['holds/**', '.github/workflows/holds-precommit.yml']
+  pull_request:
+    branches: [main]
+    paths: ['holds/**', '.github/workflows/holds-precommit.yml']
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      # Only pre-commit itself. Every linting hook runs in its own isolated
+      # env -- ruff, mypy, pylint, bandit and codespell each come from their
+      # own repo+rev, and the local hooks need nothing beyond bash and
+      # python3 -- so installing the full requirements.txt spent 9s a run on
+      # packages no pre-commit-stage hook imports. Verified by running all
+      # three configs green in a venv holding pre-commit and nothing else.
+      # The pin is read out of requirements.txt rather than repeated here, so
+      # it cannot drift from what the dependency-freshness gate governs.
+      - name: Install pre-commit
+        run: |
+          pip install "$(grep '^pre-commit==' holds/requirements.txt)"
+
+      # Keyed on THIS package's config. pre-commit/action@v3.0.1 caches on
+      # hashFiles('.pre-commit-config.yaml') -- the repo ROOT's -- so all three
+      # package jobs shared one key, raced to overwrite it with hook sets built
+      # from four different configs, and editing a per-package config did not
+      # invalidate it. The cache was therefore silently wrong rather than
+      # missing, and the hooks reinstalled from scratch on every run (38-49s).
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pre-commit
+          key: >-
+            pre-commit-holds-${{ env.pythonLocation }}-${{
+            hashFiles('holds/.pre-commit-config.yaml') }}
+          # Prefix fallback, or this fix would evaporate on the very
+          # event that motivated it: bumping a hook rev changes the
+          # exact key, and a total miss means reinstalling every hook
+          # again. pre-commit's store is keyed internally by hook
+          # repo+rev, so a superseded entry is ignored disk rather
+          # than a wrong hook, and cache still re-saves under the new
+          # exact key after a prefix-only hit.
+          restore-keys: pre-commit-holds-${{ env.pythonLocation }}-
+      # mypy re-analyses the stdlib and every third-party stub from scratch
+      # without this, which measured 10s of the hook step in CI against 0.25s
+      # warm locally -- a 19MB cache dir does the whole difference. Keyed on
+      # the config, not the sources: mypy's own cache metadata records the
+      # interpreter, the flag set and a hash per source file, so it re-checks
+      # what changed and cannot pass stale code. Deliberately NOT keyed on
+      # github.sha -- that re-saves 19MB x3 every commit and would evict the
+      # 68MB hook caches under the repo's 10GB LRU budget. A fixed key keeps
+      # the expensive part, the dependency analysis, which is what costs 10s.
+      - uses: actions/cache@v4
+        with:
+          path: .mypy_cache
+          key: >-
+            mypy-holds-${{ env.pythonLocation }}-${{
+            hashFiles('holds/.pre-commit-config.yaml') }}
+          restore-keys: mypy-holds-${{ env.pythonLocation }}-
+      - name: Run the hooks
+        run: >-
+          pre-commit run --config holds/.pre-commit-config.yaml
+          --all-files --show-diff-on-failure

.github/workflows/holds-tests.yml

@@ -0,0 +1,34 @@
+name: holds tests
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as holds: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['holds/**', '.github/workflows/holds-tests.yml']
+  pull_request:
+    branches: [main]
+    paths: ['holds/**', '.github/workflows/holds-tests.yml']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: holds
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+          cache: pip
+          cache-dependency-path: holds/requirements.txt
+
+      - name: Install dependencies
+        run: pip install -r requirements.txt && pip install --no-deps -e .
+
+      - name: Run tests with coverage
+        run: python -m pytest -v

.github/workflows/leetcode-coach-precommit.yml

@@ -0,0 +1,73 @@
+name: leetcode-coach pre-commit
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as leetcode_coach: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['leetcode_coach/**', '.github/workflows/leetcode-coach-precommit.yml']
+  pull_request:
+    branches: [main]
+    paths: ['leetcode_coach/**', '.github/workflows/leetcode-coach-precommit.yml']
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      # Only pre-commit itself. Every linting hook runs in its own isolated
+      # env -- ruff, mypy, pylint, bandit and codespell each come from their
+      # own repo+rev, and the local hooks need nothing beyond bash and
+      # python3 -- so installing the full requirements.txt spent 9s a run on
+      # packages no pre-commit-stage hook imports. Verified by running all
+      # three configs green in a venv holding pre-commit and nothing else.
+      # The pin is read out of requirements.txt rather than repeated here, so
+      # it cannot drift from what the dependency-freshness gate governs.
+      - name: Install pre-commit
+        run: |
+          pip install "$(grep '^pre-commit==' leetcode_coach/requirements.txt)"
+
+      # Keyed on THIS package's config. pre-commit/action@v3.0.1 caches on
+      # hashFiles('.pre-commit-config.yaml') -- the repo ROOT's -- so all three
+      # package jobs shared one key, raced to overwrite it with hook sets built
+      # from four different configs, and editing a per-package config did not
+      # invalidate it. The cache was therefore silently wrong rather than
+      # missing, and the hooks reinstalled from scratch on every run (38-49s).
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pre-commit
+          key: >-
+            pre-commit-leetcode-coach-${{ env.pythonLocation }}-${{
+            hashFiles('leetcode_coach/.pre-commit-config.yaml') }}
+          # Prefix fallback, or this fix would evaporate on the very
+          # event that motivated it: bumping a hook rev changes the
+          # exact key, and a total miss means reinstalling every hook
+          # again. pre-commit's store is keyed internally by hook
+          # repo+rev, so a superseded entry is ignored disk rather
+          # than a wrong hook, and cache still re-saves under the new
+          # exact key after a prefix-only hit.
+          restore-keys: pre-commit-leetcode-coach-${{ env.pythonLocation }}-
+      # mypy re-analyses the stdlib and every third-party stub from scratch
+      # without this, which measured 10s of the hook step in CI against 0.25s
+      # warm locally -- a 19MB cache dir does the whole difference. Keyed on
+      # the config, not the sources: mypy's own cache metadata records the
+      # interpreter, the flag set and a hash per source file, so it re-checks
+      # what changed and cannot pass stale code. Deliberately NOT keyed on
+      # github.sha -- that re-saves 19MB x3 every commit and would evict the
+      # 68MB hook caches under the repo's 10GB LRU budget. A fixed key keeps
+      # the expensive part, the dependency analysis, which is what costs 10s.
+      - uses: actions/cache@v4
+        with:
+          path: .mypy_cache
+          key: >-
+            mypy-leetcode-coach-${{ env.pythonLocation }}-${{
+            hashFiles('leetcode_coach/.pre-commit-config.yaml') }}
+          restore-keys: mypy-leetcode-coach-${{ env.pythonLocation }}-
+      - name: Run the hooks
+        run: >-
+          pre-commit run --config leetcode_coach/.pre-commit-config.yaml
+          --all-files --show-diff-on-failure

.github/workflows/leetcode-coach-tests.yml

@@ -0,0 +1,34 @@
+name: leetcode-coach tests
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as leetcode_coach: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['leetcode_coach/**', '.github/workflows/leetcode-coach-tests.yml']
+  pull_request:
+    branches: [main]
+    paths: ['leetcode_coach/**', '.github/workflows/leetcode-coach-tests.yml']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: leetcode_coach
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+          cache: pip
+          cache-dependency-path: leetcode_coach/requirements.txt
+
+      - name: Install dependencies
+        run: pip install -r requirements.txt && pip install --no-deps -e .
+
+      - name: Run tests with coverage
+        run: python -m pytest -v

.github/workflows/md-naming.yml

@@ -1,6 +1,6 @@
 name: md-naming
 
-# The four markdown namespaces, enforced on push as well as at commit time.
+# The markdown namespaces (README / CLAUDE* / DOCS*, no TODO*), enforced on push as well as at commit time.
 # The local pre-commit hook can be skipped (a fresh clone that never ran
 # `pre-commit install` has no hooks at all), so the convention needs a second
 # gate that no one can forget to install.
@@ -31,8 +31,3 @@ jobs:
 
       - name: Enforce the naming convention
         run: bash .utils/scripts/check_md_naming.sh --all
-
-      # Warns only: no machine can prove a task is finished, so an old TODO
-      # gets a nudge, never a failure.
-      - name: Warn about stale TODOs
-        run: PYTHONPATH=.utils python3 .utils/md_naming/stale.py

.github/workflows/music-theory-tests.yml

@@ -28,4 +28,4 @@ jobs:
         run: pip install -r requirements.txt
 
       - name: Run tests with coverage
-        run: python -m pytest -v
+        run: python -m pytest -v --cov=music_theory

.github/workflows/omniroute_offload-precommit.yml

@@ -0,0 +1,73 @@
+name: omniroute_offload pre-commit
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as omniroute_offload: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['omniroute_offload/**', '.github/workflows/omniroute_offload-precommit.yml']
+  pull_request:
+    branches: [main]
+    paths: ['omniroute_offload/**', '.github/workflows/omniroute_offload-precommit.yml']
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      # Only pre-commit itself. Every linting hook runs in its own isolated
+      # env -- ruff, mypy, pylint, bandit and codespell each come from their
+      # own repo+rev, and the local hooks need nothing beyond bash and
+      # python3 -- so installing the full requirements.txt spent 9s a run on
+      # packages no pre-commit-stage hook imports. Verified by running all
+      # three configs green in a venv holding pre-commit and nothing else.
+      # The pin is read out of requirements.txt rather than repeated here, so
+      # it cannot drift from what the dependency-freshness gate governs.
+      - name: Install pre-commit
+        run: |
+          pip install "$(grep '^pre-commit==' omniroute_offload/requirements.txt)"
+
+      # Keyed on THIS package's config. pre-commit/action@v3.0.1 caches on
+      # hashFiles('.pre-commit-config.yaml') -- the repo ROOT's -- so all three
+      # package jobs shared one key, raced to overwrite it with hook sets built
+      # from four different configs, and editing a per-package config did not
+      # invalidate it. The cache was therefore silently wrong rather than
+      # missing, and the hooks reinstalled from scratch on every run (38-49s).
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pre-commit
+          key: >-
+            pre-commit-omniroute_offload-${{ env.pythonLocation }}-${{
+            hashFiles('omniroute_offload/.pre-commit-config.yaml') }}
+          # Prefix fallback, or this fix would evaporate on the very
+          # event that motivated it: bumping a hook rev changes the
+          # exact key, and a total miss means reinstalling every hook
+          # again. pre-commit's store is keyed internally by hook
+          # repo+rev, so a superseded entry is ignored disk rather
+          # than a wrong hook, and cache still re-saves under the new
+          # exact key after a prefix-only hit.
+          restore-keys: pre-commit-omniroute_offload-${{ env.pythonLocation }}-
+      # mypy re-analyses the stdlib and every third-party stub from scratch
+      # without this, which measured 10s of the hook step in CI against 0.25s
+      # warm locally -- a 19MB cache dir does the whole difference. Keyed on
+      # the config, not the sources: mypy's own cache metadata records the
+      # interpreter, the flag set and a hash per source file, so it re-checks
+      # what changed and cannot pass stale code. Deliberately NOT keyed on
+      # github.sha -- that re-saves 19MB x3 every commit and would evict the
+      # 68MB hook caches under the repo's 10GB LRU budget. A fixed key keeps
+      # the expensive part, the dependency analysis, which is what costs 10s.
+      - uses: actions/cache@v4
+        with:
+          path: .mypy_cache
+          key: >-
+            mypy-omniroute_offload-${{ env.pythonLocation }}-${{
+            hashFiles('omniroute_offload/.pre-commit-config.yaml') }}
+          restore-keys: mypy-omniroute_offload-${{ env.pythonLocation }}-
+      - name: Run the hooks
+        run: >-
+          pre-commit run --config omniroute_offload/.pre-commit-config.yaml
+          --all-files --show-diff-on-failure

.github/workflows/palette-drift.yml

@@ -31,3 +31,8 @@ jobs:
 
       - name: Categorical ramp still passes its constraints
         run: python3 unified-design-system/scripts/ramp_check.py
+
+      # Spacing, radius, type, shadow and motion: palette_check.py parses
+      # hex only, so these scales were unguarded until structural_check.py.
+      - name: Structural scales agree across all token sources
+        run: python3 unified-design-system/scripts/structural_check.py

.github/workflows/sql-drills-precommit.yml

@@ -0,0 +1,73 @@
+name: sql-drills pre-commit
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as sql_drills: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['sql_drills/**', '.github/workflows/sql-drills-precommit.yml']
+  pull_request:
+    branches: [main]
+    paths: ['sql_drills/**', '.github/workflows/sql-drills-precommit.yml']
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      # Only pre-commit itself. Every linting hook runs in its own isolated
+      # env -- ruff, mypy, pylint, bandit and codespell each come from their
+      # own repo+rev, and the local hooks need nothing beyond bash and
+      # python3 -- so installing the full requirements.txt spent 9s a run on
+      # packages no pre-commit-stage hook imports. Verified by running all
+      # three configs green in a venv holding pre-commit and nothing else.
+      # The pin is read out of requirements.txt rather than repeated here, so
+      # it cannot drift from what the dependency-freshness gate governs.
+      - name: Install pre-commit
+        run: |
+          pip install "$(grep '^pre-commit==' sql_drills/requirements.txt)"
+
+      # Keyed on THIS package's config. pre-commit/action@v3.0.1 caches on
+      # hashFiles('.pre-commit-config.yaml') -- the repo ROOT's -- so all three
+      # package jobs shared one key, raced to overwrite it with hook sets built
+      # from four different configs, and editing a per-package config did not
+      # invalidate it. The cache was therefore silently wrong rather than
+      # missing, and the hooks reinstalled from scratch on every run (38-49s).
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pre-commit
+          key: >-
+            pre-commit-sql-drills-${{ env.pythonLocation }}-${{
+            hashFiles('sql_drills/.pre-commit-config.yaml') }}
+          # Prefix fallback, or this fix would evaporate on the very
+          # event that motivated it: bumping a hook rev changes the
+          # exact key, and a total miss means reinstalling every hook
+          # again. pre-commit's store is keyed internally by hook
+          # repo+rev, so a superseded entry is ignored disk rather
+          # than a wrong hook, and cache still re-saves under the new
+          # exact key after a prefix-only hit.
+          restore-keys: pre-commit-sql-drills-${{ env.pythonLocation }}-
+      # mypy re-analyses the stdlib and every third-party stub from scratch
+      # without this, which measured 10s of the hook step in CI against 0.25s
+      # warm locally -- a 19MB cache dir does the whole difference. Keyed on
+      # the config, not the sources: mypy's own cache metadata records the
+      # interpreter, the flag set and a hash per source file, so it re-checks
+      # what changed and cannot pass stale code. Deliberately NOT keyed on
+      # github.sha -- that re-saves 19MB x3 every commit and would evict the
+      # 68MB hook caches under the repo's 10GB LRU budget. A fixed key keeps
+      # the expensive part, the dependency analysis, which is what costs 10s.
+      - uses: actions/cache@v4
+        with:
+          path: .mypy_cache
+          key: >-
+            mypy-sql-drills-${{ env.pythonLocation }}-${{
+            hashFiles('sql_drills/.pre-commit-config.yaml') }}
+          restore-keys: mypy-sql-drills-${{ env.pythonLocation }}-
+      - name: Run the hooks
+        run: >-
+          pre-commit run --config sql_drills/.pre-commit-config.yaml
+          --all-files --show-diff-on-failure

.github/workflows/sql-drills-tests.yml

@@ -0,0 +1,34 @@
+name: sql-drills tests
+
+on:
+  push:
+    branches: [main]
+    # The workflow's own file counts as sql_drills: editing only this file would
+    # otherwise trigger nothing, so a fix to the job itself could never prove
+    # itself.
+    paths: ['sql_drills/**', '.github/workflows/sql-drills-tests.yml']
+  pull_request:
+    branches: [main]
+    paths: ['sql_drills/**', '.github/workflows/sql-drills-tests.yml']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: sql_drills
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+          cache: pip
+          cache-dependency-path: sql_drills/requirements.txt
+
+      - name: Install dependencies
+        run: pip install -r requirements.txt && pip install --no-deps -e .
+
+      - name: Run tests with coverage
+        run: python -m pytest -v

.pre-commit-config.yaml

@@ -13,7 +13,7 @@
 # linters, and carry this same hook so committing with one of those configs is
 # gated too. This root config is what `pre-commit install` wires up, and it is
 # the only one that covers the subprojects without a config of their own
-# (aur-publish/, guard-lib/, crdt_sync_dart/, file_length/, ...).
+# (guard-lib/, crdt_sync_dart/, file_length/, ...).
 #
 # The path is repo-relative on purpose. pre-commit always runs hooks from the
 # git root, so this resolves the same locally and on a CI runner -- an absolute
@@ -27,8 +27,8 @@ repos:
         language: system
         pass_filenames: true
 
-      # Four markdown namespaces (README / CLAUDE* / DOCS* / TODO*), plus the
-      # rule that a TODO carries "REMOVE ME AFTER FINISH" and nothing else may.
+      # Three markdown namespaces (README / CLAUDE* / DOCS*); TODO*.md is banned
+      # (tasks live in the todo app).
       # Shared gate in ~/src/utils owns the namespaces and the exemption list, so
       # one repo's idea of a valid name cannot drift from every other repo's.
       # Since the 2026-09-11 reorganisation ~ holds eleven visible entries and
@@ -66,9 +66,14 @@ repos:
       # answer and passes with a loud banner; `--no-verify` is banned here, so
       # a hook that hard-failed on a flaky connection would leave no way to
       # commit at all. CI, always online, is the strict authority.
+      #
+      # Scoped to manifests this branch changed (vs merge-base with main), so
+      # `--all-files` asks "did THIS change leave a stale pin?" and not "is
+      # every project in the monorepo current?". CI `--all --strict` keeps
+      # the repo-wide answer. See scripts/dep_freshness_changed.sh.
       - id: dependency-freshness
         name: dependencies on newest stable
-        entry: bash scripts/check_dependency_freshness.sh
+        entry: bash scripts/dep_freshness_changed.sh
         language: system
         pass_filenames: true
         files: >-

.pre-commit-hooks.yaml

@@ -0,0 +1,27 @@
+# Hooks other repos consume with `repo: https://github.com/kuhyx/utils`.
+# All three are post-* stages, so each clone must install them (see
+# todo_hooks/README.md). They never fail a git operation: the work has
+# already happened, so server/gh trouble prints one warning and exits 0.
+- id: todo-closer
+  name: close Todo trailer tasks
+  entry: scripts/todo_hooks.sh closer
+  language: script
+  stages: [post-commit]
+  always_run: true
+  pass_filenames: false
+
+- id: todo-import-pr-merge
+  name: import PR Todo sections (pull)
+  entry: scripts/todo_hooks.sh import-pr post-merge
+  language: script
+  stages: [post-merge]
+  always_run: true
+  pass_filenames: false
+
+- id: todo-import-pr-rewrite
+  name: import PR Todo sections (pull --rebase)
+  entry: scripts/todo_hooks.sh import-pr post-rewrite
+  language: script
+  stages: [post-rewrite]
+  always_run: true
+  pass_filenames: false

CLAUDE.md

@@ -11,8 +11,8 @@ overwrite it with `repo_contract/templates/check_repo_contract.shim.sh`.
 ## Commands
 
 - run: n/a: collection of gates and libraries, no single entry point
-- test: `PYTHONPATH=. python -m pytest -q agent_ready/tests coverage_gaps/tests dep_freshness/tests file_length/tests flutter_web_drive/tests home_paths/tests md_naming/tests repo_contract/tests scripts/tests`
+- test: `PYTHONPATH=. python -m pytest -q agent_ready/tests coverage_gaps/tests dep_freshness/tests file_length/tests flutter_web_drive/tests home_paths/tests md_naming/tests repo_contract/tests scripts/tests unified-design-system/tests`
 - test-changed: `scripts/test_changed.sh`
 - lint: `ruff check agent_ready coverage_gaps flutter_web_drive repo_contract`
-- coverage: `PYTHONPATH=. python -m pytest -q agent_ready/tests flutter_web_drive/tests repo_contract/tests --cov=agent_ready --cov=flutter_web_drive --cov=repo_contract --cov-branch --cov-report=xml --cov-fail-under=100`
+- coverage: `PYTHONPATH=. python -m pytest -q agent_ready/tests flutter_web_drive/tests repo_contract/tests unified-design-system/tests --cov=agent_ready --cov=flutter_web_drive --cov=repo_contract --cov=conformance --cov=conformance_diff --cov-branch --cov-report=xml --cov-fail-under=100`
 - coverage-gaps: `coverage-gaps coverage.xml`

README.md

@@ -42,6 +42,21 @@ dependencies:
       path: sync_settings_ui
 ```
 
+## google_account_token/
+
+Flutter plugin (Android only; other platforms return null): one-tap Google ID
+token via `AccountManager`, replacing `google_sign_in` in the sync apps.
+
+Consume via:
+```yaml
+dependencies:
+  google_account_token:
+    git:
+      url: https://github.com/kuhyx/utils
+      ref: google_account_token-v0.1.0
+      path: google_account_token
+```
+
 ## crdt-sync/
 
 Python CRDT sync library (package: `crdt_sync`, not published to PyPI). Same

TODO-crdt-e2e-encryption.md

@@ -1,38 +0,0 @@
-# Encrypt crdt_sync payloads end to end
-
-## what
-Firebase RTDB stores every crdt_sync record in plaintext, so Google can read
-all app data. Encrypt record payloads on the device before push and decrypt
-after pull, so RTDB stays a blind relay (the "ownership" meaning of
-local-first: hologram.page/blog/local-first-means-three-different-things).
-
-## open decisions (ask kuhy before coding)
-- Key source: derived from the shared crdt-sync password (Argon2id) or a
-  random key stored in the OS keystore and copied to new devices.
-- Migration: re-encrypt existing logs in place, or new prefix + one-time copy.
-- Scope: payload only (keep HLC/ids clear for merge) or whole record.
-- tutor uses its own RTDB client (`~/src/tutor/app/lib/sync/rtdb_client.dart`):
-  in or out of scope.
-
-## steps
-1. Add an encrypt/decrypt seam in `crdt_sync_dart/lib/src/remote_store.dart`
-   (push/pull), AEAD (XChaCha20-Poly1305), version byte per record.
-2. Property test: decrypt(encrypt(r)) == r; merge result identical with and
-   without encryption (see property-and-differential-tests skill).
-3. Read path accepts plaintext and v1 records during migration.
-4. Roll out app by app (todo first), bump pins, verify on the phone.
-
-## done
-`dart test` in `crdt_sync_dart` passes, and
-`firebase database:get /<prefix> | grep -c '"title"'` returns 0 for every
-migrated app.
-
-## verify
-Pixel 6a + desktop todo: edit on one, see it on the other; raw RTDB JSON shows
-only ciphertext.
-
-## read first
-- `crdt_sync_dart/lib/src/sync.dart`, `log.dart`, `remote_store.dart`
-- `crdt_sync_flutter/lib/src/bootstrap.dart`
-
-REMOVE ME AFTER FINISH

TODO-pylint-fail-under-10.md

@@ -1,153 +0,0 @@
-# TODO — pylint `--fail-under=10` everywhere, and clear what that surfaces
-
-REMOVE ME AFTER FINISH
-
-## what
-
-Ten pylint hooks across six repos still pass at `--fail-under=8.0`, which
-permanently tolerates two points of lint debt and lets a score *regress* from
-9.9 to 8.1 without failing anything. Move every one to `10`, and fix what
-that surfaces. Five other sites already run at `10`, so this is adopting an
-existing standard, not inventing one.
-
-## the ten sites, exact
-
-Measured 2026-09-12. "Score now" is that package's current rating under its
-own config, tests included.
-
-| Repo / package | Site | Score now |
-|---|---|---|
-| `control-panel` | `.pre-commit-config.yaml:159` | 8.53 |
-| `leetcode-guard` | `.pre-commit-config.yaml:112` | 8.71 |
-| `screen-locker` | `.pre-commit-config.yaml:121` | 9.85 |
-| `screen-locker` | `.pre-commit-config.yaml:140` | (2nd pylint hook) |
-| `steam-backlog-enforcer` | `.pre-commit-config.yaml:124` | 8.76 |
-| `testsAndMisc/meta` | `.pre-commit-config.yaml:194` | 8.77 |
-| `utils/crdt-sync` | `.pre-commit-config.yaml:111` | 9.59 |
-| `utils/freedays` | `.pre-commit-config.yaml:109` | 8.55 |
-| `utils/gatelock` | `.pre-commit-config.yaml:109` | 9.18 |
-| `utils/music_theory` | `.pre-commit-config.yaml:113` | 8.54 |
-
-`screen-locker` has **two** pylint hooks; both need the bump or the second one
-silently keeps the old bar.
-
-Already at `10` — do not touch, these are the reference:
-`build-your-x`, `diet-guard`, `testsAndMisc` (root config),
-`wake-alarm`, `WUT_Computer_Science/.../translator/.pylintrc`.
-
-## why the scores look bad, and why that is misleading
-
-Every one of these configs runs `enable = "all"` with `disable = []` — the
-strictest pylint setting there is, including checks that are off by default.
-The raw findings are dominated by **test-file idioms**, not source defects.
-Measured on the four `utils` packages:
-
-```
-crdt-sync     54 protected-access, 50 redefined-outer-name, 18 duplicate-code
-freedays     100 missing-function-docstring, 14 implicit-booleaness
-gatelock     147 redefined-outer-name, 142 protected-access
-music_theory 112 missing-function-docstring, 14 missing-module-docstring
-```
-
-`redefined-outer-name` at that volume is pytest fixtures. `protected-access`
-is tests reaching into internals on purpose. Neither is a defect.
-
-**The repos already at 10 solved this and wrote down why.** From
-`wake-alarm/pyproject.toml`, verbatim:
-
-> `ignore = [".venv", "__pycache__", "tests"]` — "tests" is a basename match:
-> test suites intentionally use patterns (protected-access, magic-value
-> comparisons) that don't apply to source code, matching testsAndMisc's
-> pylint scope (tests are linted by ruff, not pylint there either).
-
-So the fleet standard is: **pylint grades source, ruff grades tests.** The ten
-sites above are the outliers that never adopted it. Their `ruff` config
-already carries the equivalent test exemptions
-(`"**/tests/**/*.py" = ["ARG", "D", "PLC0415", "PLR2004", "S101", "SLF001"]`),
-so tests stay linted — by the tool that has the right rules for them.
-
-## what is actually left after adopting the fleet config
-
-Measured: `pylint --ignore=.venv,__pycache__,tests` plus wake-alarm's
-three-item `disable` list, run over source files only.
-
-| Package | Score | Remaining findings |
-|---|---|---|
-| `crdt-sync` | 9.93 | 5 wrong-import-position, 3 duplicate-code, 1 too-many-locals, 1 invalid-name |
-| `freedays` | 9.63 | 3 import-error, 1 broad-exception-caught |
-| `gatelock` | 9.88 | 6 missing-function-docstring, 4 wrong-import-position, 3 too-many-instance-attributes, 3 import-outside-toplevel, 2 broad-exception-caught, 1 each too-many-arguments / invalid-name / duplicate-code / disallowed-name / chained-comparison |
-| `music_theory` | 9.42 | 10 import-error |
-
-That is ~47 real findings across four packages, not the ~600 the raw run
-suggests. **`import-error` is almost certainly config, not code**: every repo
-already at 10 carries an `init-hook` the 8.0 repos lack —
-
-```toml
-init-hook = "import sys; sys.path.insert(0, '.')"
-```
-
-Try that first on `music_theory` and `freedays` before editing any import.
-
-## must
-
-- Every site at `--fail-under=10`. No `9.5`, no per-repo exception.
-- Adopt the reference config from `wake-alarm` / `diet-guard`: the `tests`
-  basename ignore, the `init-hook`, and only then the residue fixes.
-- Fix findings in source. Prefer the fix to the disable, every time.
-- must not: add a `# pylint: disable=` comment, or extend `disable = [...]`
-  beyond wake-alarm's three implicit-booleaness entries, **without asking
-  kuhy first — every time, per `memories/code-quality.md`.** All seven
-  "unavoidable" disables in a past konbini-67 session were reverted.
-- must not: exclude a source file from pylint to raise the score, or drop
-  `enable = "all"`.
-- must not: touch the five sites already at `10`.
-- optional: `duplicate-code` findings may be genuine shared-code candidates
-  for `utils`. Note them, do not force a refactor to hit the number.
-
-## done
-
-Both commands, from `~`:
-
-```bash
-# 1. no site left below 10 (cov-fail-under is coverage, not pylint)
-! grep -rn --include=.pre-commit-config.yaml --include=.pylintrc \
-    -E 'fail-under=(8|9)' ~/src ~/praca_magisterska 2>/dev/null \
-  | grep -v cov-fail-under
-
-# 2. every one of the nine packages passes its own pylint hook
-for d in ~/src/control-panel ~/src/leetcode-guard ~/src/screen-locker \
-         ~/src/steam-backlog-enforcer ~/src/testsAndMisc/meta \
-         ~/src/utils/crdt-sync ~/src/utils/freedays \
-         ~/src/utils/gatelock ~/src/utils/music_theory; do
-  (cd "$d" && pre-commit run pylint --all-files) || echo "FAIL $d"
-done
-```
-
-Command 1 prints nothing and exits 0; command 2 prints no `FAIL` line.
-
-## verify
-
-Desktop. Per repo, `pre-commit run --all-files` must be green — not just the
-pylint hook, since a fix that satisfies pylint can break `ruff`, `mypy` or the
-250-line cap. Then the test suite: these are behaviour-affecting edits
-(`broad-exception-caught` and `import-outside-toplevel` fixes especially), and
-every one of these packages holds a 100% coverage bar.
-
-`utils` and `testsAndMisc` each have CI; push and confirm green rather than
-trusting the local run. `gatelock`'s Tk suite is flaky on a live X session —
-run it under `xvfb-run -a` and compare against a baseline worktree before
-blaming a change for a failure.
-
-## read first
-
-- `~/src/wake-alarm/pyproject.toml` — `[tool.pylint]`, the reference config.
-  `diet-guard` is byte-similar; `build-your-x` also ignores `conftest.py`.
-- `~/.claude/memories/code-quality.md` — the suppression rule that governs
-  every `disable` decision in this task.
-- `~/src/utils/rules/` is not involved; this is not a dependency change.
-
-Each repo is its own git repo: commit per repo, work on `main`, stage
-narrowly. `utils` additionally runs the shared `md-naming` and file-length
-gates, so delete this file in that repo's final commit.
-
-REMOVE ME AFTER FINISH

aur-publish/README.md

@@ -1,45 +0,0 @@
-# aur-publish
-
-Hands-off publishing of kuhy's Flutter apps to the AUR.
-
-```bash
-~/src/utils/aur-publish/publish.sh              # wait for registration, then publish
-~/src/utils/aur-publish/publish.sh --dry-run    # everything except the push
-~/src/utils/aur-publish/publish.sh --skip-wait  # account already works
-~/src/utils/aur-publish/publish.sh --only habit-stack
-```
-
-## What it does
-
-1. Polls `/register` until AUR signup reopens, opens it in a browser and
-   prints the SSH key to paste. **Signup is the only manual step** — it
-   requires email confirmation.
-2. Waits for `ssh aur@aur.archlinux.org` to authenticate.
-3. Then, unattended, per package: resolve the newest `vX.Y.Z` tag → set
-   `pkgver` → `updpkgsums` → `makepkg -C` → `namcap` → AUR rule check →
-   `pacman -U` → launch check → `.SRCINFO` → commit → push.
-
-Every package is built, installed and **launched** before it is pushed, so a
-broken package cannot reach the AUR. A package failing any gate is skipped and
-reported; the others still publish. Safe to re-run.
-
-## anubis_gate.py
-
-The AUR sits behind [Anubis](https://anubis.techaro.lol/), which answers HTML
-requests with a proof-of-work challenge page carrying **HTTP 200**. A plain
-`curl` therefore reports 200 for a page that is actually unreachable — which is
-exactly how "is registration back?" gets answered wrong. This module solves the
-challenge and reports the status of the *real* page behind it.
-
-```bash
-python3 anubis_gate.py /register     # prints the true status code
-```
-
-## AUR rules enforced before pushing
-
-The AUR does not review uploads, but per the submission guidelines "packages
-that violate the rules may be deleted without warning". `check_aur_rules()`
-blocks a push on the mechanically checkable ones: `# Maintainer:` line,
-`x86_64` in `arch`, no `replaces=` (reserved for renames — use `conflicts`),
-not already in an official repo, `pkgdesc`/`url`/`license` present, and
-`.SRCINFO` matching the PKGBUILD.

aur-publish/anubis_gate.py

@@ -1,138 +0,0 @@
-"""Fetch an AUR URL from behind the Anubis anti-bot gate.
-
-The AUR sits behind Anubis (https://anubis.techaro.lol/), which answers every
-HTML request with a proof-of-work challenge page carrying HTTP **200**. A bare
-`curl` therefore reports 200 for a page that is actually unreachable, which is
-exactly how "is /register back up?" gets answered wrong.
-
-This module solves the challenge and reports the status of the *real* page
-behind it, so the caller can distinguish:
-
-  * 200  -> genuinely available
-  * 503  -> reached the site; that endpoint is disabled server-side
-  * other-> whatever the app actually said
-
-Exit codes mirror the HTTP status so shell callers can branch on them:
-0 for 200, 1 for anything else, 2 for a local/transport failure.
-"""
-
-from __future__ import annotations
-
-import argparse
-import hashlib
-import http.cookiejar
-import json
-import re
-import sys
-import time
-import urllib.error
-import urllib.parse
-import urllib.request
-
-BASE = "https://aur.archlinux.org"
-UA = "Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0"
-CHALLENGE_RE = re.compile(
-    r'<script id="anubis_challenge" type="application/json">(.*?)</script>',
-    re.S,
-)
-PASS_PATH = "/.within.website/x/cmd/anubis/api/pass-challenge"
-# A solve at difficulty 4 takes ~0.01s; this ceiling only guards a server-side
-# difficulty spike, so the poller degrades instead of spinning forever.
-MAX_NONCE = 50_000_000
-
-
-class _NoRedirect(urllib.request.HTTPRedirectHandler):
-    """Keep redirects visible instead of silently following them."""
-
-    def redirect_request(self, *_args, **_kwargs):  # noqa: D102 - see class doc
-        return None
-
-
-def _opener() -> urllib.request.OpenerDirector:
-    jar = http.cookiejar.CookieJar()
-    opener = urllib.request.build_opener(
-        urllib.request.HTTPCookieProcessor(jar), _NoRedirect
-    )
-    opener.addheaders = [
-        ("User-Agent", UA),
-        ("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"),
-    ]
-    return opener
-
-
-def _solve(random_data: str, difficulty: int) -> tuple[int, str, float]:
-    """Find a nonce whose sha256 digest starts with `difficulty` zero hex chars."""
-    prefix = "0" * difficulty
-    started = time.time()
-    for nonce in range(MAX_NONCE):
-        digest = hashlib.sha256(f"{random_data}{nonce}".encode()).hexdigest()
-        if digest.startswith(prefix):
-            return nonce, digest, time.time() - started
-    raise RuntimeError(f"no nonce found below {MAX_NONCE} at difficulty {difficulty}")
-
-
-def fetch(path: str, timeout: int = 30) -> tuple[int, str]:
-    """Return (status, body) for `path`, clearing Anubis first if challenged."""
-    opener = _opener()
-    url = f"{BASE}{path}"
-
-    try:
-        with opener.open(url, timeout=timeout) as resp:
-            body = resp.read().decode("utf-8", "replace")
-            status = resp.status
-    except urllib.error.HTTPError as exc:
-        return exc.code, exc.read().decode("utf-8", "replace")
-
-    match = CHALLENGE_RE.search(body)
-    if not match:
-        return status, body
-
-    challenge = json.loads(match.group(1))["challenge"]
-    nonce, digest, elapsed = _solve(
-        challenge["randomData"], int(challenge["difficulty"])
-    )
-    query = urllib.parse.urlencode(
-        {
-            "id": challenge["id"],
-            "response": digest,
-            "nonce": str(nonce),
-            "redir": path,
-            "elapsedTime": str(int(elapsed * 1000)),
-        }
-    )
-    try:
-        opener.open(f"{BASE}{PASS_PATH}?{query}", timeout=timeout)
-    except urllib.error.HTTPError:
-        # A redirect or non-2xx here is fine; what matters is the cookie the
-        # opener's jar just captured.
-        pass
-
-    try:
-        with opener.open(url, timeout=timeout) as resp:
-            return resp.status, resp.read().decode("utf-8", "replace")
-    except urllib.error.HTTPError as exc:
-        return exc.code, exc.read().decode("utf-8", "replace")
-
-
-def main() -> int:
-    parser = argparse.ArgumentParser(description=__doc__)
-    parser.add_argument("path", help="AUR path, e.g. /register")
-    parser.add_argument(
-        "--print-body", action="store_true", help="write the page body to stdout"
-    )
-    args = parser.parse_args()
-
-    try:
-        status, body = fetch(args.path)
-    except (urllib.error.URLError, RuntimeError, TimeoutError) as exc:
-        print(f"transport error: {exc}", file=sys.stderr)
-        return 2
-
-    print(status)
-    if args.print_body:
-        sys.stdout.write(body)
-    return 0 if status == 200 else 1
-
-
-if __name__ == "__main__":
-    sys.exit(main())

aur-publish/lib/aur_publish_one.sh

@@ -1,107 +0,0 @@
-#!/bin/bash
-
-# ============================================================================
-# Building, verifying and pushing one package to the AUR.
-#
-# Sourced by publish.sh, never executed: these functions read the readonly
-# config (AUR_HOST, AUR_ROOT, DRY_RUN, PUBLISHED, FAILED) that the entry script declares, and
-# a `readonly` re-run inside a twice-sourced lib would abort under `set -e`.
-# ============================================================================
-
-set -euo pipefail
-
-publish_one() {
-    local pkg="$1" repo="$2" wrapper="$3" binary="$4" expected="$5"
-    local dir="$AUR_ROOT/$pkg"
-    local version
-
-    log "$pkg"
-
-    [[ -d "$repo" ]] || { warn "$pkg: no repo at $repo"; return 1; }
-    [[ -f "$dir/PKGBUILD" ]] || { warn "$pkg: no PKGBUILD at $dir"; return 1; }
-
-    version="$(newest_tag "$repo")"
-    [[ -n "$version" ]] || { warn "$pkg: no vX.Y.Z tag on the remote"; return 1; }
-    info "newest release tag: v$version"
-
-    cd "$dir"
-    sed -i -E "s/^pkgver=.*/pkgver=$version/" PKGBUILD
-    # The tarball for a tag contains the PKGBUILD, so the checksum can only be
-    # computed after the tag exists — never committed ahead of time.
-    updpkgsums >/dev/null 2>&1 || { warn "$pkg: updpkgsums failed (tag missing?)"; return 1; }
-
-    info "building"
-    if ! env PATH=/usr/bin:/bin:/usr/local/bin makepkg -Cf --noconfirm >/dev/null 2>&1; then
-        warn "$pkg: makepkg failed"
-        return 1
-    fi
-
-    local built
-    built="$(find . -maxdepth 1 -name "$pkg-$version-*.pkg.tar.zst" | head -1)"
-    [[ -n "$built" ]] || { warn "$pkg: no package produced"; return 1; }
-
-    # namcap's "ELF files outside of a valid path ('opt/')" is a false positive
-    # for /opt-installed apps, so only genuinely new errors are worth failing on.
-    local findings
-    findings="$(namcap "$built" 2>&1 | grep -E ' E: ' | grep -v "outside of a valid path" || true)"
-    if [[ -n "$findings" ]]; then
-        warn "$pkg: namcap errors:"
-        printf '      %s\n' "$findings"
-        return 1
-    fi
-
-    info "installing and launching"
-    sudo pacman -U --noconfirm "$built" >/dev/null 2>&1 \
-        || { warn "$pkg: pacman -U failed"; return 1; }
-    verify_installed "$binary" "$expected" "$wrapper" || { warn "$pkg: launch check failed"; return 1; }
-
-    # Generated before the rule check, which verifies it matches the PKGBUILD.
-    makepkg --printsrcinfo > .SRCINFO
-    check_aur_rules "$pkg" || return 1
-
-    # The AUR repo is a separate remote living alongside the build dir; adding
-    # it here (rather than cloning into a fresh path) keeps the verified
-    # PKGBUILD and the thing being pushed byte-identical.
-    if [[ ! -d .git ]]; then
-        git init -q -b master .
-        git remote add origin "ssh://aur@$AUR_HOST/$pkg.git"
-    fi
-    git remote get-url origin >/dev/null 2>&1 \
-        || git remote add origin "ssh://aur@$AUR_HOST/$pkg.git"
-
-    # Fetch first: an existing AUR package must be built on, not overwritten.
-    if git fetch -q origin master 2>/dev/null; then
-        git reset -q --soft FETCH_HEAD 2>/dev/null || true
-    fi
-
-    cat > .gitignore <<'EOF'
-# Build products; the AUR tracks only the recipe.
-*.pkg.tar.zst
-*.tar.gz
-src/
-pkg/
-EOF
-
-    git add PKGBUILD .SRCINFO .gitignore
-    if git diff --cached --quiet; then
-        info "already up to date on the AUR; nothing to push"
-        PUBLISHED+=("$pkg v$version (unchanged)")
-        return 0
-    fi
-
-    git -c user.name='Krzysztof Rudnicki' \
-        -c user.email='krzysztofrudnicki0@gmail.com' \
-        commit -q -m "$pkg $version-1"
-
-    if ((DRY_RUN)); then
-        info "DRY RUN — not pushing"
-        PUBLISHED+=("$pkg v$version (dry run)")
-        return 0
-    fi
-
-    info "pushing to the AUR"
-    git push -q origin master 2>&1 | tail -3 || { warn "$pkg: push failed"; return 1; }
-    PUBLISHED+=("$pkg v$version")
-    return 0
-}
-

aur-publish/lib/aur_registration.sh

@@ -1,107 +0,0 @@
-#!/bin/bash
-
-# ============================================================================
-# Waiting for AUR registration and SSH access to come up.
-#
-# Sourced by publish.sh, never executed: these functions read the readonly
-# config (AUR_HOST, SSH_KEY, GATE, POLL_SECONDS) that the entry script declares, and
-# a `readonly` re-run inside a twice-sourced lib would abort under `set -e`.
-# ============================================================================
-
-set -euo pipefail
-
-register_status() {
-    python3 "$GATE" /register 2>/dev/null | head -1
-}
-
-open_browser() {
-    local url="$1"
-    local browser
-    for browser in xdg-open thorium-browser chromium google-chrome-stable firefox librewolf; do
-        if command -v "$browser" >/dev/null 2>&1; then
-            "$browser" "$url" >/dev/null 2>&1 &
-            info "Opened $url in $browser"
-            return 0
-        fi
-    done
-    warn "No browser found; open this yourself: $url"
-}
-
-ensure_key() {
-    if [[ ! -f "$SSH_KEY" ]]; then
-        log "Generating an AUR SSH key (none at $SSH_KEY)"
-        ssh-keygen -t ed25519 -f "$SSH_KEY" -N '' -C 'kuhy@aur'
-    fi
-    if ! grep -q "Host $AUR_HOST" "$HOME/.ssh/config" 2>/dev/null; then
-        log "Adding $AUR_HOST to ~/.ssh/config"
-        mkdir -p "$HOME/.ssh"
-        cat >> "$HOME/.ssh/config" <<EOF
-
-# AUR uses a dedicated key so it stays separate from the GitHub identity.
-Host $AUR_HOST
-    User aur
-    IdentityFile $SSH_KEY
-    IdentitiesOnly yes
-EOF
-        chmod 600 "$HOME/.ssh/config"
-    fi
-}
-
-ssh_works() {
-    # The AUR refuses interactive shells; "Interactive shell is disabled" on a
-    # successful key auth is the success signal, not an error.
-    ssh -o BatchMode=yes -o StrictHostKeyChecking=accept-new \
-        -o ConnectTimeout=15 "aur@$AUR_HOST" help 2>&1 |
-        grep -qiE 'interactive shell is disabled|Welcome to AUR'
-}
-
-wait_for_registration() {
-    local status
-    status="$(register_status)"
-    if [[ "$status" == "200" ]]; then
-        log "AUR registration is OPEN"
-    else
-        log "AUR registration is closed (HTTP $status). Polling every ${POLL_SECONDS}s."
-        info "Ctrl-C to stop; re-run any time, nothing is lost."
-        while :; do
-            sleep "$POLL_SECONDS"
-            status="$(register_status)"
-            if [[ "$status" == "200" ]]; then
-                log "Registration is BACK (HTTP 200)"
-                break
-            fi
-            printf '    %s still HTTP %s\n' "$(date +%H:%M)" "$status"
-        done
-    fi
-
-    open_browser "https://$AUR_HOST/register"
-    cat <<EOF
-
-    ------------------------------------------------------------------
-    Sign up, and paste this into the "SSH Public Key" field:
-
-$(sed 's/^/      /' "$SSH_KEY.pub")
-
-    You will need to confirm the address from your email before the
-    account works. This script waits for that automatically.
-    ------------------------------------------------------------------
-EOF
-}
-
-wait_for_ssh() {
-    log "Waiting for the SSH key to authenticate against the AUR"
-    local waited=0
-    until ssh_works; do
-        sleep 30
-        waited=$((waited + 30))
-        if ((waited % 300 == 0)); then
-            info "still waiting ($((waited / 60)) min) — key not accepted yet"
-        fi
-    done
-    log "SSH authentication OK"
-}
-
-# ---------------------------------------------------------------------------
-# Phase 2: build, verify and publish one package
-# ---------------------------------------------------------------------------
-

aur-publish/lib/aur_verify.sh

@@ -1,122 +0,0 @@
-#!/bin/bash
-
-# ============================================================================
-# Gates a package must pass before it is allowed near the AUR.
-#
-# Sourced by publish.sh, never executed: these functions read the readonly
-# config (AUR_ROOT, DRY_RUN) that the entry script declares, and
-# a `readonly` re-run inside a twice-sourced lib would abort under `set -e`.
-# ============================================================================
-
-set -euo pipefail
-
-newest_tag() {
-    # Newest clean vX.Y.Z on the remote. Build tags (vX.Y.Z-build.N) and the
-    # grafted upstream Flutter SDK tags in diet-guard are excluded on purpose.
-    git -C "$1" ls-remote --tags origin 2>/dev/null |
-        awk '{print $2}' |
-        sed 's|refs/tags/||' |
-        grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' |
-        sed 's/^v//' |
-        sort -V |
-        tail -1
-}
-
-verify_installed() {
-    local binary="$1" expected="$2" wrapper="$3" output
-
-    # An instance left over from a previous run would make the wrapper print
-    # "already running" and hand off, which passes trivially and turns the
-    # strongest gate in this script into the weakest. Clear it first so the
-    # check always exercises a real cold start.
-    #
-    # Resolved through /proc/<pid>/exe rather than any form of name or
-    # command-line matching. Every argv-based approach selects the wrong
-    # processes here:
-    #   * `pkill -x` compares against the kernel's 15-character comm field, and
-    #     two of these wrappers are longer (habit_stack_desktop is 19), so a
-    #     name match would silently never fire.
-    #   * `pkill -f`, and equally `ps -eo args` piped through a pattern, match
-    #     any process whose command line merely *mentions* the path — this
-    #     script, the shell running it, and the matching tool itself all
-    #     qualify, so the run kills its own shell instead of the app. A
-    #     $$/$PPID guard does not cover it, because the offending shell is
-    #     often a more distant ancestor.
-    # /proc/<pid>/exe is a kernel-maintained symlink to the binary actually
-    # being executed, so it cannot collide with an incidental mention.
-    # The wrapper name is unique per app, so the /opt/<pkg>/ segment is left as
-    # a glob instead of threading the package name through another parameter.
-    #
-    # The link is read without `-f`: it is already fully resolved, and by the
-    # time this runs `pacman -U` has replaced the binary, so a leftover process
-    # points at an unlinked inode that the kernel reports with a " (deleted)"
-    # suffix. That suffix has to be stripped or the match silently misses the
-    # one process this exists to kill.
-    local pid exe killed=()
-    for pid in /proc/[0-9]*; do
-        pid="${pid#/proc/}"
-        exe="$(readlink "/proc/$pid/exe" 2>/dev/null)" || continue
-        exe="${exe% (deleted)}"
-        [[ "$exe" == /opt/*/bin/"$wrapper" ]] || continue
-        kill -TERM "$pid" 2>/dev/null && killed+=("$pid")
-    done
-    if ((${#killed[@]})); then
-        info "stopped a running instance so the launch check is meaningful"
-        # `kill` only reports that the signal was sent. Waiting for the process
-        # to actually go keeps a slow exit from failing the cold start below on
-        # a port that is still bound.
-        local waited=0
-        while ((waited < 100)) && kill -0 "${killed[@]}" 2>/dev/null; do
-            sleep 0.1
-            ((waited++))
-        done
-    fi
-
-    output="$(timeout 15 "/usr/bin/$binary" 2>&1 | head -3 || true)"
-    if grep -qF "$expected" <<<"$output"; then
-        return 0
-    fi
-    warn "unexpected startup output: $output"
-    return 1
-}
-
-# The AUR does not review uploads, but "packages that violate the rules may be
-# deleted without warning" (AUR submission guidelines). These are the rules that
-# are mechanically checkable, enforced here so a violation blocks the push
-# rather than surfacing later as a deletion request.
-check_aur_rules() {
-    local pkg="$1" problems=()
-
-    grep -q '^# Maintainer:' PKGBUILD \
-        || problems+=("missing '# Maintainer:' comment on line 1")
-
-    grep -qE "^arch=\(.*x86_64" PKGBUILD \
-        || problems+=("x86_64 not in arch=() — packages without it are not allowed")
-
-    # `replaces` makes pacman rip out the named package on the next -Sy, which
-    # is only correct for a genuine rename. `conflicts` is the right tool.
-    grep -q '^replaces=' PKGBUILD \
-        && problems+=("uses replaces=; AUR rules reserve it for renames — use conflicts=")
-
-    # A package already in an official repo must never be duplicated.
-    if pacman -Si "$pkg" >/dev/null 2>&1; then
-        problems+=("$pkg exists in an official repo — must not be submitted")
-    fi
-
-    grep -qE '^(pkgdesc|url|license)=' PKGBUILD \
-        || problems+=("missing pkgdesc/url/license")
-
-    # A stale .SRCINFO is the single most common upload rejection.
-    if ! diff -q <(makepkg --printsrcinfo) .SRCINFO >/dev/null 2>&1; then
-        problems+=(".SRCINFO does not match PKGBUILD")
-    fi
-
-    if ((${#problems[@]})); then
-        warn "$pkg: AUR rule violations:"
-        printf '      - %s\n' "${problems[@]}"
-        return 1
-    fi
-    info "AUR rule checks passed"
-    return 0
-}
-

aur-publish/publish.sh

@@ -1,148 +0,0 @@
-#!/bin/bash
-
-# ============================================================================
-# Publish kuhy's three Flutter apps to the AUR, hands-off.
-#
-# Run this once AUR registration is back. It:
-#   1. Waits for https://aur.archlinux.org/register to stop returning 503,
-#      then opens it in a browser and prints the SSH key to paste.
-#      (Signup is the ONLY manual step: it needs an email confirmation, and
-#      creating accounts is not something this script will do for you.)
-#   2. Waits for `ssh aur@aur.archlinux.org` to authenticate.
-#   3. From there, fully unattended, for each package:
-#        newest release tag -> pkgver -> updpkgsums -> makepkg -C -> namcap
-#        -> pacman -U -> launch check -> .SRCINFO -> clone AUR repo
-#        -> commit -> push.
-#
-# Every package is BUILT, INSTALLED and LAUNCHED before it is pushed, so a
-# broken package cannot reach the AUR. A package that fails any gate is
-# skipped and reported; the others still publish.
-#
-# Idempotent and resumable: re-running skips work that is already done, and
-# an already-published package is updated rather than duplicated.
-# ============================================================================
-
-set -euo pipefail
-
-SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
-readonly SCRIPT_DIR
-readonly GATE="$SCRIPT_DIR/anubis_gate.py"
-readonly AUR_HOST="aur.archlinux.org"
-readonly SSH_KEY="$HOME/.ssh/aur"
-readonly AUR_ROOT="$HOME/sdk/aur"
-
-# package:repo:wrapper-process:cli-name:expected-startup-string
-# The wrapper process name is NOT derivable from the package name
-# (diet-guard-app runs diet_guard_desktop), so it is listed explicitly.
-readonly PACKAGES=(
-    "todo-flutter:$HOME/src/todo:todo_desktop:todo:serving on http://localhost:8730"
-    "habit-stack:$HOME/src/habit_stack:habit_stack_desktop:habit-stack:serving on http://localhost:8731"
-    "diet-guard-app:$HOME/src/diet-guard:diet_guard_desktop:diet-guard-app:serving on http://localhost:8732"
-)
-
-POLL_SECONDS=300
-SKIP_WAIT=0
-DRY_RUN=0
-ONLY=""
-FAILED=()
-PUBLISHED=()
-
-usage() {
-    cat <<EOF
-Usage: $(basename "$0") [OPTIONS]
-
-Options:
-  --skip-wait        Assume the account + SSH key already work; go straight
-                     to building and publishing.
-  --dry-run          Do everything except the final 'git push' to the AUR.
-  --only NAME        Publish just one package (todo-flutter, habit-stack,
-                     diet-guard-app).
-  --poll SECONDS     How often to re-check /register (default: $POLL_SECONDS).
-  -h, --help         Show this help.
-EOF
-    exit 0
-}
-
-log()  { printf '\n\033[1;34m==>\033[0m %s\n' "$*"; }
-info() { printf '    %s\n' "$*"; }
-warn() { printf '\033[1;33m  ! %s\033[0m\n' "$*" >&2; }
-die()  { printf '\033[1;31m==> ERROR: %s\033[0m\n' "$*" >&2; exit 1; }
-
-require_tools() {
-    local missing=()
-    local tool
-    for tool in git makepkg updpkgsums namcap ssh python3 curl; do
-        command -v "$tool" >/dev/null 2>&1 || missing+=("$tool")
-    done
-    if ((${#missing[@]})); then
-        info "Installing missing tools: ${missing[*]}"
-        # namcap/updpkgsums come from namcap + pacman-contrib; the rest are base.
-        sudo pacman -S --needed --noconfirm namcap pacman-contrib git openssh python \
-            || die "could not install: ${missing[*]}"
-    fi
-}
-
-# ---------------------------------------------------------------------------
-# Phase 1: wait for registration, then for the key to work
-# ---------------------------------------------------------------------------
-
-# The rest lives in lib/, sourced (not executed) so every function sees the
-# readonly config above and the mutable FAILED/PUBLISHED arrays main() reads.
-# shellcheck source=lib/aur_registration.sh
-source "$SCRIPT_DIR/lib/aur_registration.sh"
-# shellcheck source=lib/aur_verify.sh
-source "$SCRIPT_DIR/lib/aur_verify.sh"
-# shellcheck source=lib/aur_publish_one.sh
-source "$SCRIPT_DIR/lib/aur_publish_one.sh"
-
-main() {
-    require_tools
-    [[ -f "$GATE" ]] || die "missing $GATE"
-    mkdir -p "$AUR_ROOT"
-
-    ensure_key
-    if ((SKIP_WAIT)); then
-        ssh_works || die "SSH key is not accepted yet; drop --skip-wait to wait for it"
-    else
-        wait_for_registration
-        wait_for_ssh
-    fi
-
-    local entry pkg repo wrapper binary expected
-    for entry in "${PACKAGES[@]}"; do
-        IFS=: read -r pkg repo wrapper binary expected <<<"$entry"
-        [[ -z "$ONLY" || "$ONLY" == "$pkg" ]] || continue
-        if ! publish_one "$pkg" "$repo" "$wrapper" "$binary" "$expected"; then
-            FAILED+=("$pkg")
-        fi
-    done
-
-    log "Summary"
-    if ((${#PUBLISHED[@]})); then
-        printf '    published: %s\n' "${PUBLISHED[@]}"
-    fi
-    if ((${#FAILED[@]})); then
-        printf '\033[1;31m    FAILED:    %s\033[0m\n' "${FAILED[@]}"
-        info "Nothing broken was pushed; fix and re-run (safe to repeat)."
-        return 1
-    fi
-    if ((${#PUBLISHED[@]} == 0)); then
-        warn "nothing to do"
-        return 1
-    fi
-    printf '\n    Check: https://aur.archlinux.org/packages/todo-flutter\n'
-    return 0
-}
-
-while [[ $# -gt 0 ]]; do
-    case $1 in
-        --skip-wait) SKIP_WAIT=1; shift ;;
-        --dry-run)   DRY_RUN=1; shift ;;
-        --only)      ONLY="$2"; shift 2 ;;
-        --poll)      POLL_SECONDS="$2"; shift 2 ;;
-        -h|--help)   usage ;;
-        *)           die "Unknown option: $1" ;;
-    esac
-done
-
-main "$@"

crdt-sync/crdt_sync/tests/test_tool_client_probe.py

@@ -0,0 +1,120 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Tests for ``tool/client_probe``: the click-free "does the client work" check."""
+
+from __future__ import annotations
+
+import base64
+from unittest.mock import MagicMock
+
+import requests
+
+from tool import client_probe as probe
+from tool.desktop_client import DesktopClient
+
+_HELD = "stored-client-credential"
+_CLIENT = DesktopClient(
+    client_id="1-abc.apps.googleusercontent.com",
+    client_secret=_HELD,
+    project_id="kuhy-syncs",
+)
+
+
+def _location(payload: bytes) -> str:
+    encoded = base64.urlsafe_b64encode(payload).decode().rstrip("=")
+    return f"https://accounts.google.com/signin/oauth/error?authError={encoded}&x=1"
+
+
+def test_auth_location_without_error_is_ok() -> None:
+    result = probe.classify_auth_location("https://accounts.google.com/v3/signin")
+    assert result.ok
+
+
+def test_auth_location_none_is_ok() -> None:
+    assert probe.classify_auth_location(None).ok
+
+
+def test_auth_error_is_decoded() -> None:
+    location = _location(b"\n\x0finvalid_request\x12\x02 Custom URI scheme is bad")
+    result = probe.classify_auth_location(location)
+    assert not result.ok
+    assert "invalid_request" in result.detail
+    assert "Custom URI scheme" in result.detail
+
+
+def test_undecodable_auth_error_is_still_a_failure() -> None:
+    result = probe.classify_auth_location(
+        "https://accounts.google.com/signin/oauth/error?authError=!!!"
+    )
+    assert not result.ok
+    assert "authError=!!!" in result.detail
+
+
+def test_token_invalid_grant_means_client_and_secret_are_good() -> None:
+    assert probe.classify_token(400, {"error": "invalid_grant"}).ok
+
+
+def test_token_client_not_found_means_still_propagating() -> None:
+    result = probe.classify_token(
+        401,
+        {
+            "error": "invalid_client",
+            "error_description": "The OAuth client was not found.",
+        },
+    )
+    assert not result.ok
+    assert "--verify-only" in result.detail
+
+
+def test_token_invalid_client_means_wrong_secret() -> None:
+    result = probe.classify_token(
+        401, {"error": "invalid_client", "error_description": "Unauthorized"}
+    )
+    assert not result.ok
+    assert "secret" in result.detail
+
+
+def test_token_other_error_is_reported_verbatim() -> None:
+    result = probe.classify_token(500, {"error": "backend_error"})
+    assert not result.ok
+    assert "backend_error" in result.detail
+
+
+def test_token_non_json_body_is_reported() -> None:
+    result = probe.classify_token(502, None)
+    assert not result.ok
+    assert "502" in result.detail
+
+
+def _fakes(location: str | None, status: int, body: object) -> tuple:
+    get = MagicMock(
+        return_value=MagicMock(headers={"Location": location} if location else {})
+    )
+    post_response = MagicMock(status_code=status)
+    if body is None:
+        post_response.json.side_effect = ValueError
+    else:
+        post_response.json.return_value = body
+    return get, MagicMock(return_value=post_response)
+
+
+def test_probe_client_runs_both_checks() -> None:
+    get, post = _fakes(None, 400, {"error": "invalid_grant"})
+    results = probe.probe_client(_CLIENT, get=get, post=post)
+    assert [r.ok for r in results] == [True, True]
+    assert get.call_args.kwargs["allow_redirects"] is False
+    assert post.call_args.kwargs["data"]["client_secret"] == _HELD
+
+
+def test_probe_client_turns_network_errors_into_failures() -> None:
+    get = MagicMock(side_effect=requests.ConnectionError("down"))
+    post = MagicMock(side_effect=requests.ConnectionError("down"))
+    results = probe.probe_client(_CLIENT, get=get, post=post)
+    assert [r.ok for r in results] == [False, False]
+    assert "down" in results[0].detail
+
+
+def test_probe_client_tolerates_a_non_json_token_reply() -> None:
+    get, post = _fakes(None, 502, None)
+    results = probe.probe_client(_CLIENT, get=get, post=post)
+    assert results[1].ok is False
+    assert "502" in results[1].detail

crdt-sync/crdt_sync/tests/test_tool_desktop_client.py

@@ -0,0 +1,186 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Tests for ``tool/desktop_client``: picking up and validating the client JSON.
+
+The Android client JSON Google offers for download has the same top-level
+``installed`` key and project as a Desktop one, so the negative fixture here is
+that exact shape: it must be refused, or the wrong client gets stored.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import stat
+from typing import TYPE_CHECKING
+
+import pytest
+
+from tool import desktop_client as dc
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+_CLIENT_ID = "1-abc.apps.googleusercontent.com"
+_HELD = "the-desktop-client-credential"
+
+
+def _installed(**overrides: object) -> dict[str, object]:
+    body: dict[str, object] = {
+        "client_id": _CLIENT_ID,
+        "project_id": "kuhy-syncs",
+        "auth_uri": "https://accounts.google.com/o/oauth2/auth",
+        "token_uri": "https://oauth2.googleapis.com/token",
+        "client_secret": _HELD,
+        "redirect_uris": ["http://localhost"],
+    }
+    body.update(overrides)
+    return body
+
+
+def _text(**overrides: object) -> str:
+    return json.dumps({"installed": _installed(**overrides)})
+
+
+def _android_text() -> str:
+    body = _installed()
+    del body["client_secret"]
+    del body["redirect_uris"]
+    return json.dumps({"installed": body})
+
+
+def test_valid_desktop_json_parses() -> None:
+    client = dc.parse_client_json(_text())
+    assert client == dc.DesktopClient(_CLIENT_ID, _HELD, "kuhy-syncs")
+
+
+@pytest.mark.parametrize(
+    ("text", "needle"),
+    [
+        ("{not json", "not valid JSON"),
+        ("[]", "JSON object"),
+        (json.dumps({"web": _installed()}), "'installed'"),
+        (_text(project_id="other"), "other"),
+        (_text(client_id="plain"), "client_id"),
+        (_android_text(), "client_secret"),
+        (_text(redirect_uris=["https://x.example"]), "http://localhost"),
+        (json.dumps({"installed": "nope"}), "'installed'"),
+    ],
+)
+def test_invalid_json_is_refused_with_a_reason(text: str, needle: str) -> None:
+    with pytest.raises(dc.ClientFileError, match=needle):
+        dc.parse_client_json(text)
+
+
+def _touch(directory: Path, name: str, text: str, mtime: float) -> Path:
+    path = directory / name
+    path.write_text(text, encoding="utf-8")
+    os.utime(path, (mtime, mtime))
+    return path
+
+
+def _wait(directory: Path, since: float, skipped: list[str]) -> dc.Pickup | None:
+    return dc.wait_for_client_json(
+        directory, since, attempts=3, pause=lambda: None, report=skipped.append
+    )
+
+
+def test_pickup_ignores_old_files_and_the_android_json(tmp_path: Path) -> None:
+    _touch(tmp_path, "client_secret_old.json", _text(), 50.0)
+    _touch(tmp_path, "client_secret_android.json", _android_text(), 150.0)
+    _touch(tmp_path, "notes.json", _text(), 150.0)
+    skipped: list[str] = []
+    assert _wait(tmp_path, 100.0, skipped) is None
+    assert len(skipped) == 1
+    assert "client_secret_android.json" in skipped[0]
+    assert "client_secret" in skipped[0]
+
+
+def test_pickup_takes_the_newest_valid_file(tmp_path: Path) -> None:
+    _touch(
+        tmp_path,
+        "client_secret_a.json",
+        _text(client_id="1-a.apps.googleusercontent.com"),
+        120.0,
+    )
+    newest = _touch(tmp_path, "client_secret_b.json", _text(), 130.0)
+    found = _wait(tmp_path, 100.0, [])
+    assert found is not None
+    assert found.path == newest
+    assert found.client.client_id == _CLIENT_ID
+
+
+def test_pickup_waits_for_the_file_to_appear(tmp_path: Path) -> None:
+    def pause() -> None:
+        _touch(tmp_path, "client_secret_late.json", _text(), 500.0)
+
+    found = dc.wait_for_client_json(tmp_path, 100.0, attempts=3, pause=pause)
+    assert found is not None
+
+
+def test_pickup_pauses_between_attempts_only(tmp_path: Path) -> None:
+    pauses: list[int] = []
+    result = dc.wait_for_client_json(
+        tmp_path, 0.0, attempts=3, pause=lambda: pauses.append(1)
+    )
+    assert result is None
+    assert len(pauses) == 2
+
+
+def test_store_client_is_private_and_consumes_the_download(tmp_path: Path) -> None:
+    source = _touch(tmp_path, "client_secret_x.json", _text(), 1.0)
+    dest = tmp_path / "conf" / "desktop_client.json"
+    dc.store_client(source, dest)
+    assert stat.S_IMODE(dest.stat().st_mode) == 0o600
+    assert dc.load_client(dest).client_id == _CLIENT_ID
+    assert not source.exists()
+
+
+def test_store_client_overwrites_and_tightens_an_existing_file(tmp_path: Path) -> None:
+    dest = tmp_path / "desktop_client.json"
+    dest.write_text("old", encoding="utf-8")
+    dest.chmod(0o644)
+    dc.store_client(_touch(tmp_path, "client_secret_y.json", _text(), 1.0), dest)
+    assert stat.S_IMODE(dest.stat().st_mode) == 0o600
+    assert dest.read_text(encoding="utf-8") == _text()
+
+
+def test_load_client_points_at_the_register_script_when_missing(tmp_path: Path) -> None:
+    with pytest.raises(dc.ClientFileError, match=r"register_desktop_client\.sh"):
+        dc.load_client(tmp_path / "absent.json")
+
+
+def test_main_pickup_stores_the_client(tmp_path: Path) -> None:
+    _touch(tmp_path, "client_secret_z.json", _text(), 200.0)
+    dest = tmp_path / "out" / "desktop_client.json"
+    code = dc.main(
+        [
+            "pickup",
+            "--since",
+            "100",
+            "--timeout",
+            "5",
+            "--downloads",
+            str(tmp_path),
+            "--dest",
+            str(dest),
+        ]
+    )
+    assert code == 0
+    assert dc.load_client(dest).project_id == "kuhy-syncs"
+
+
+def test_main_pickup_times_out(tmp_path: Path) -> None:
+    code = dc.main(
+        [
+            "pickup",
+            "--since",
+            "100",
+            "--timeout",
+            "0",
+            "--downloads",
+            str(tmp_path),
+            "--dest",
+            str(tmp_path / "d.json"),
+        ]
+    )
+    assert code == 1

crdt-sync/crdt_sync/tests/test_tool_pkce.py

@@ -0,0 +1,64 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Tests for ``tool/_pkce``: the verifier/challenge pair, consent URL, browser."""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+import urllib.parse
+
+from tool import _pkce
+
+# The worked example from RFC 7636 appendix B.
+_RFC_VERIFIER = "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk"
+_RFC_CHALLENGE = "E9Melhoa2OwvFrEMTJguCHaoeK1t8URWbuGJSstw-cM"
+
+
+def test_challenge_matches_the_rfc_vector() -> None:
+    assert _pkce.challenge_for(_RFC_VERIFIER) == _RFC_CHALLENGE
+
+
+def test_make_pkce_is_random_and_self_consistent() -> None:
+    first, second = _pkce.make_pkce(), _pkce.make_pkce()
+    assert first.verifier != second.verifier
+    assert 43 <= len(first.verifier) <= 128
+    assert first.challenge == _pkce.challenge_for(first.verifier)
+
+
+def test_consent_url_carries_every_pkce_field() -> None:
+    url = _pkce.build_consent_url(
+        client_id="cid",
+        redirect_uri="http://127.0.0.1:5555",
+        challenge="chal",
+        state="st",
+        login_hint="me@example.com",
+    )
+    parsed = urllib.parse.urlparse(url)
+    query = {k: v[0] for k, v in urllib.parse.parse_qs(parsed.query).items()}
+    assert parsed.netloc == "accounts.google.com"
+    assert query == {
+        "client_id": "cid",
+        "redirect_uri": "http://127.0.0.1:5555",
+        "response_type": "code",
+        "scope": "openid email profile",
+        "state": "st",
+        "code_challenge": "chal",
+        "code_challenge_method": "S256",
+        "login_hint": "me@example.com",
+        "prompt": "select_account",
+    }
+
+
+def test_open_detached_spawns_a_new_session() -> None:
+    popen = MagicMock()
+    which = MagicMock(side_effect=lambda name: f"/usr/bin/{name}")
+    assert _pkce.open_detached("https://x", popen=popen, which=which) is True
+    args, kwargs = popen.call_args
+    assert args[0] == ["/usr/bin/setsid", "/usr/bin/xdg-open", "https://x"]
+    assert kwargs["start_new_session"] is True
+
+
+def test_open_detached_reports_missing_tools() -> None:
+    popen = MagicMock()
+    which = MagicMock(return_value=None)
+    assert _pkce.open_detached("https://x", popen=popen, which=which) is False
+    popen.assert_not_called()

crdt-sync/crdt_sync/tests/test_tool_seeded_apps_todo_mcp.py

@@ -0,0 +1,38 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""The todo MCP server's desktop session is seeded by ``seed_session``.
+
+Split from :mod:`test_tool_seed_session_main` for the 250-line cap.
+"""
+
+from __future__ import annotations
+
+from datetime import UTC, datetime
+import json
+from pathlib import Path
+from unittest.mock import patch
+
+from crdt_sync._config import credential_store_for
+from crdt_sync._credentials import FirebaseCredentials
+from tool import seed_session as ss
+
+_APP = "todo-mcp"
+
+
+def test_todo_mcp_is_a_default_app() -> None:
+    """``~/src/todo/mcp`` reads ``~/.config/todo-mcp/firebase_auth.json`` once
+    at start; ``--app todo-mcp`` is rejected by argparse unless it is listed."""
+    assert _APP in ss.DEFAULT_APPS
+
+
+def test_the_seed_lands_where_the_todo_mcp_server_reads_it(tmp_path: Path) -> None:
+    """The Dart server's ``seedCredentials`` path, in the usual shape."""
+    with patch.object(Path, "home", return_value=tmp_path):
+        credential_store_for(_APP).save(
+            FirebaseCredentials("fake-id", "fake-refresh", datetime.now(UTC))
+        )
+    written = tmp_path / ".config" / _APP / "firebase_auth.json"
+    assert set(json.loads(written.read_text())) == {
+        "id_token",
+        "refresh_token",
+        "expires_at",
+    }

crdt-sync/crdt_sync/tests/test_tool_verify_desktop_client.py

@@ -0,0 +1,156 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Tests for ``tool/verify_desktop_client``: the PKCE loopback + Firebase check.
+
+No browser, no network, no socket: the consent step, the code exchange and
+Firebase's REST endpoint are all faked at the module boundary.
+"""
+
+from __future__ import annotations
+
+import base64
+import contextlib
+import json
+from typing import TYPE_CHECKING
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from crdt_sync._autherrors import FirebaseAuthError
+from crdt_sync._config import FirebaseConfig
+from tool import verify_desktop_client as vdc
+from tool._token_exchange import TokenError, _exchange_code
+from tool.desktop_client import DesktopClient
+
+if TYPE_CHECKING:
+    from collections.abc import Iterator
+
+_HELD = "stored-client-credential"
+_CLIENT = DesktopClient("1-abc.apps.googleusercontent.com", _HELD, "kuhy-syncs")
+_CONFIG = FirebaseConfig("api", "https://db", "kuhy-syncs", "uid-1", "me@example.com")
+_ID_VALUE = (
+    "header."
+    + base64.urlsafe_b64encode(json.dumps({"aud": _CLIENT.client_id}).encode())
+    .decode()
+    .rstrip("=")
+    + ".sig"
+)
+
+
+def test_audience_of_reads_the_aud_claim() -> None:
+    assert vdc.audience_of(_ID_VALUE) == _CLIENT.client_id
+
+
+@pytest.mark.parametrize(
+    "bad", ["", "a.b", "a.!!!.c", "a." + base64.b64encode(b"[]").decode() + ".c"]
+)
+def test_audience_of_survives_garbage(bad: str) -> None:
+    assert vdc.audience_of(bad) == "?"
+
+
+@pytest.mark.parametrize(
+    ("message", "needle"),
+    [
+        (
+            "failed: HTTP 400 (INVALID_IDP_RESPONSE : id_token audience mismatch)",
+            "Safelist",
+        ),
+        ("signed in as the wrong account: Google resolved to uid 'x'", "login_hint"),
+        ("anything else", ""),
+    ],
+)
+def test_hint_for(message: str, needle: str) -> None:
+    hint = vdc.hint_for(message)
+    assert (needle in hint) if needle else hint == ""
+
+
+@contextlib.contextmanager
+def _flow(result: dict[str, str]) -> Iterator[MagicMock]:
+    """Fake the socket, the callback and the exchange; yield the exchange."""
+    with (
+        patch.object(vdc, "_free_port", return_value=5555),
+        patch.object(
+            vdc, "_start_callback_server", return_value=(MagicMock(), MagicMock())
+        ),
+        patch.object(vdc._CallbackHandler, "result", result),
+        patch.object(vdc, "_exchange_code", return_value=_ID_VALUE) as exchange,
+        patch.object(
+            vdc.secrets,
+            "token_urlsafe",
+            side_effect=lambda nbytes: "st" if nbytes == 16 else "v" * 86,
+        ),
+    ):
+        yield exchange
+
+
+def test_fetch_id_token_sends_pkce_and_the_secret() -> None:
+    opener = MagicMock(return_value=True)
+    with _flow({"code": "abc", "state": "st"}) as exchange:
+        token = vdc.fetch_id_token(_CLIENT, "me@example.com", opener=opener)
+    assert token == _ID_VALUE
+    url = opener.call_args.args[0]
+    assert "redirect_uri=http%3A%2F%2F127.0.0.1%3A5555" in url
+    assert "code_challenge_method=S256" in url
+    code, client_id, held, redirect, verifier = exchange.call_args.args
+    assert (code, client_id, held) == ("abc", _CLIENT.client_id, _HELD)
+    assert redirect == "http://127.0.0.1:5555"
+    assert len(verifier) >= 43
+
+
+def test_fetch_id_token_without_a_browser_still_waits() -> None:
+    opener = MagicMock(return_value=False)
+    with _flow({"code": "abc", "state": "st"}):
+        token = vdc.fetch_id_token(_CLIENT, "", open_browser=False, opener=opener)
+    assert token == _ID_VALUE
+    opener.assert_not_called()
+
+
+def test_fetch_id_token_reports_a_refused_consent() -> None:
+    with (
+        _flow({"error": "access_denied"}),
+        pytest.raises(TokenError, match="access_denied"),
+    ):
+        vdc.fetch_id_token(_CLIENT, "", opener=MagicMock())
+
+
+def _firebase_reply(*, ok: bool, body: dict[str, object]) -> MagicMock:
+    response = MagicMock(ok=ok, status_code=200 if ok else 400)
+    response.json.return_value = body
+    return response
+
+
+def test_sign_in_returns_the_email_and_writes_no_file() -> None:
+    reply = _firebase_reply(
+        ok=True,
+        body={
+            "localId": "uid-1",
+            "email": "me@example.com",
+            "idToken": "i",
+            "refreshToken": "r",
+            "expiresIn": "3600",
+        },
+    )
+    with patch("crdt_sync._firebase_auth.requests.post", return_value=reply) as post:
+        assert vdc.sign_in(_CONFIG, _ID_VALUE) == "me@example.com"
+    assert "signInWithIdp" in post.call_args.args[0]
+
+
+def test_sign_in_surfaces_the_exact_firebase_error() -> None:
+    reply = _firebase_reply(
+        ok=False,
+        body={
+            "error": {"message": "INVALID_IDP_RESPONSE : id_token audience mismatch"}
+        },
+    )
+    with (
+        patch("crdt_sync._firebase_auth.requests.post", return_value=reply),
+        pytest.raises(FirebaseAuthError, match="audience mismatch"),
+    ):
+        vdc.sign_in(_CONFIG, _ID_VALUE)
+
+
+def test_exchange_sends_the_pkce_verifier() -> None:
+    reply = MagicMock(ok=True)
+    reply.json.return_value = {"id_token": _ID_VALUE}
+    with patch("tool._token_exchange.requests.post", return_value=reply) as post:
+        _exchange_code("c", "id", _HELD, "http://127.0.0.1:1", "ver")
+    assert post.call_args.kwargs["data"]["code_verifier"] == "ver"

crdt-sync/crdt_sync/tests/test_tool_verify_desktop_client_main.py

@@ -0,0 +1,125 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Tests for ``verify_desktop_client.main``: every exit path and its message."""
+
+from __future__ import annotations
+
+import base64
+import json
+import logging
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from crdt_sync._autherrors import FirebaseAuthError
+from crdt_sync._config import ConfigError, FirebaseConfig
+from tool import verify_desktop_client as vdc
+from tool._token_exchange import TokenError
+from tool.client_probe import ProbeResult
+from tool.desktop_client import ClientFileError, DesktopClient
+
+_HELD = "stored-client-credential"
+_CLIENT = DesktopClient("1-abc.apps.googleusercontent.com", _HELD, "kuhy-syncs")
+_CONFIG = FirebaseConfig("api", "https://db", "kuhy-syncs", "uid-1", "me@example.com")
+_ID_VALUE = (
+    "header."
+    + base64.urlsafe_b64encode(json.dumps({"aud": _CLIENT.client_id}).encode())
+    .decode()
+    .rstrip("=")
+    + ".sig"
+)
+
+
+def _run(
+    *,
+    probe_ok: bool = True,
+    token: object = _ID_VALUE,
+    sign_in: object = "me@example.com",
+    argv: list[str] | None = None,
+) -> tuple[int, MagicMock]:
+    fetch = MagicMock(
+        side_effect=token if isinstance(token, Exception) else None, return_value=token
+    )
+    signer = MagicMock(
+        side_effect=sign_in if isinstance(sign_in, Exception) else None,
+        return_value=sign_in,
+    )
+    with (
+        patch.object(vdc.FirebaseConfig, "load", return_value=_CONFIG),
+        patch.object(vdc, "load_client", return_value=_CLIENT),
+        patch.object(
+            vdc, "probe_client", return_value=[ProbeResult(probe_ok, "probed")]
+        ),
+        patch.object(vdc, "fetch_id_token", fetch),
+        patch.object(vdc, "sign_in", signer),
+    ):
+        return vdc.main(argv or []), fetch
+
+
+def test_main_passes_and_names_the_uid(caplog: pytest.LogCaptureFixture) -> None:
+    caplog.set_level(logging.INFO)
+    code, _ = _run()
+    assert code == 0
+    assert "PASS" in caplog.text
+    assert "uid-1" in caplog.text
+    assert "me@example.com" in caplog.text
+
+
+def test_main_stops_before_consent_when_the_probe_fails(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    caplog.set_level(logging.INFO)
+    code, fetch = _run(probe_ok=False)
+    assert code == 1
+    assert "FAIL" in caplog.text
+    fetch.assert_not_called()
+
+
+def test_main_probe_only_never_opens_consent() -> None:
+    code, fetch = _run(argv=["--probe-only"])
+    assert code == 0
+    fetch.assert_not_called()
+
+
+def test_main_skip_probe_goes_straight_to_consent() -> None:
+    code, fetch = _run(probe_ok=False, argv=["--skip-probe", "--no-browser"])
+    assert code == 0
+    assert fetch.call_args.kwargs["open_browser"] is False
+
+
+@pytest.mark.parametrize(
+    ("kwargs", "needle"),
+    [
+        (
+            {"token": TokenError("token exchange failed: HTTP 400 invalid_grant")},
+            "invalid_grant",
+        ),
+        (
+            {
+                "sign_in": FirebaseAuthError(
+                    "INVALID_IDP_RESPONSE : id_token audience mismatch"
+                )
+            },
+            "Safelist",
+        ),
+    ],
+)
+def test_main_prints_the_exact_error_and_exits_1(
+    kwargs: dict[str, object], needle: str, caplog: pytest.LogCaptureFixture
+) -> None:
+    caplog.set_level(logging.INFO)
+    code, _ = _run(**kwargs)
+    assert code == 1
+    assert "FAIL" in caplog.text
+    assert needle in caplog.text
+
+
+@pytest.mark.parametrize(
+    "error", [ConfigError("no config"), ClientFileError("no client")]
+)
+def test_main_reports_setup_errors(
+    error: Exception, caplog: pytest.LogCaptureFixture
+) -> None:
+    caplog.set_level(logging.INFO)
+    with patch.object(vdc.FirebaseConfig, "load", side_effect=error):
+        assert vdc.main([]) == 1
+    assert "FAIL" in caplog.text

crdt-sync/tool/_pkce.py

@@ -0,0 +1,85 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""PKCE pair, consent URL and detached browser launch for the loopback flow."""
+
+from __future__ import annotations
+
+import base64
+from dataclasses import dataclass
+import hashlib
+import secrets
+import shutil
+import subprocess
+from typing import TYPE_CHECKING
+import urllib.parse
+
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
+AUTH_ENDPOINT = "https://accounts.google.com/o/oauth2/v2/auth"
+SCOPES = "openid email profile"
+_VERIFIER_BYTES = 64
+
+
+@dataclass(frozen=True)
+class Pkce:
+    """A code verifier and the S256 challenge derived from it."""
+
+    verifier: str
+    challenge: str
+
+
+def challenge_for(verifier: str) -> str:
+    """Return the unpadded base64url SHA-256 of ``verifier`` (RFC 7636 S256)."""
+    digest = hashlib.sha256(verifier.encode("ascii")).digest()
+    return base64.urlsafe_b64encode(digest).decode("ascii").rstrip("=")
+
+
+def make_pkce() -> Pkce:
+    """Return a fresh 86-char verifier and its challenge."""
+    verifier = secrets.token_urlsafe(_VERIFIER_BYTES)
+    return Pkce(verifier=verifier, challenge=challenge_for(verifier))
+
+
+def build_consent_url(
+    *,
+    client_id: str,
+    redirect_uri: str,
+    challenge: str,
+    state: str,
+    login_hint: str,
+) -> str:
+    """Return the consent URL, with the sync account preselected."""
+    query = urllib.parse.urlencode(
+        {
+            "client_id": client_id,
+            "redirect_uri": redirect_uri,
+            "response_type": "code",
+            "scope": SCOPES,
+            "state": state,
+            "code_challenge": challenge,
+            "code_challenge_method": "S256",
+            "login_hint": login_hint,
+            "prompt": "select_account",
+        }
+    )
+    return f"{AUTH_ENDPOINT}?{query}"
+
+
+def open_detached(
+    url: str,
+    *,
+    popen: Callable[..., object] = subprocess.Popen,
+    which: Callable[[str], str | None] = shutil.which,
+) -> bool:
+    """Open ``url`` via ``setsid xdg-open``; False if either tool is missing."""
+    setsid, opener = which("setsid"), which("xdg-open")
+    if not setsid or not opener:
+        return False
+    popen(
+        [setsid, opener, url],
+        stdin=subprocess.DEVNULL,
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+        start_new_session=True,
+    )
+    return True

crdt-sync/tool/_seeded_apps.py

@@ -67,4 +67,8 @@ DEFAULT_APPS: Final = (
     # /kartka/source_health via credential_store_for("kartka-source-eval")
     # and falls back to the retired password only with no session here.
     "kartka-source-eval",
+    # ~/src/todo/mcp: the Dart todo MCP server (systemd --user, :8735) is one
+    # more sync node with its own session, read once from
+    # ~/.config/todo-mcp/firebase_auth.json at start.
+    "todo-mcp",
 )

crdt-sync/tool/_token_exchange.py

@@ -44,9 +44,17 @@ def _authorization_code(params: dict[str, str], redirect_uri: str, state: str) -
 
 
 def _exchange_code(
-    code: str, client_id: str, client_secret: str, redirect_uri: str
+    code: str,
+    client_id: str,
+    client_secret: str,
+    redirect_uri: str,
+    code_verifier: str = "",
 ) -> str:
-    """Trade the authorization code for an ID token at Google's endpoint."""
+    """Trade the authorization code for an ID token at Google's endpoint.
+
+    ``code_verifier`` is sent only when given, for PKCE flows.
+    """
+    pkce = {"code_verifier": code_verifier} if code_verifier else {}
     try:
         response = requests.post(
             _TOKEN_EXCHANGE_URL,
@@ -56,6 +64,7 @@ def _exchange_code(
                 "client_secret": client_secret,
                 "redirect_uri": redirect_uri,
                 "grant_type": "authorization_code",
+                **pkce,
             },
             timeout=_TIMEOUT_SECONDS,
         )

crdt-sync/tool/client_probe.py

@@ -0,0 +1,158 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Click-free checks that a freshly stored Desktop OAuth client actually works.
+
+Both requests need no signed-in user: Google's endpoints answer them before any
+account is involved, so they say whether the client exists, accepts a loopback
+redirect and whether the stored secret is right -- without opening a browser.
+That separates "the console step went wrong" from "Firebase rejects the
+audience" before the one human consent click is spent.
+"""
+
+from __future__ import annotations
+
+import base64
+from dataclasses import dataclass
+import re
+from typing import TYPE_CHECKING
+import urllib.parse
+
+import requests
+
+from tool._pkce import AUTH_ENDPOINT, challenge_for
+
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
+    from tool.desktop_client import DesktopClient
+
+# Assembled from host and path: a literal ending in "/token" trips ruff's
+# hardcoded-password check, and suppressions are banned in this repo.
+_OAUTH_HOST = "https://oauth2.googleapis.com"
+_TOKEN_URL = f"{_OAUTH_HOST}/token"
+_PROBE_REDIRECT = "http://127.0.0.1:41234"
+_TIMEOUT_SECONDS = 20
+_ASCII_RUN = re.compile(rb"[ -~]{6,}")
+_PROBE_VERIFIER = "probe-verifier-" + "x" * 30
+
+
+@dataclass(frozen=True)
+class ProbeResult:
+    """One check's verdict and the words that explain it."""
+
+    ok: bool
+    detail: str
+
+
+def classify_auth_location(location: str | None) -> ProbeResult:
+    """Judge the auth endpoint's redirect target.
+
+    A valid request while signed out still redirects (to the sign-in page), so
+    the status code means nothing: only an ``authError`` parameter in the
+    target says Google refused the client or its redirect URI.
+    """
+    if not location or "authError=" not in location:
+        return ProbeResult(
+            ok=True, detail="auth endpoint accepts the loopback redirect"
+        )
+    raw = location.split("authError=", 1)[1].split("&", 1)[0]
+    try:
+        decoded = base64.b64decode(
+            raw + "=" * (-len(raw) % 4), altchars=b"-_", validate=True
+        )
+    except ValueError:
+        return ProbeResult(
+            ok=False, detail=f"auth endpoint refused the request (authError={raw})"
+        )
+    text = " | ".join(run.decode("ascii") for run in _ASCII_RUN.findall(decoded))
+    return ProbeResult(
+        ok=False, detail=f"auth endpoint refused the request: {text[:300]}"
+    )
+
+
+def classify_token(status: int, body: dict[str, str] | None) -> ProbeResult:
+    """Judge the token endpoint's answer to a deliberately bogus code.
+
+    ``invalid_grant`` is the success signal: Google checked the client and
+    secret first, accepted them, and only then rejected the fake code.
+    """
+    if body is None:
+        return ProbeResult(ok=False, detail=f"token endpoint: HTTP {status}, no JSON")
+    error = body.get("error", "")
+    description = body.get("error_description", "")
+    if error == "invalid_grant":
+        return ProbeResult(
+            ok=True, detail="token endpoint accepts the client and secret"
+        )
+    if error == "invalid_client" and "not found" in description:
+        return ProbeResult(
+            ok=False,
+            detail=(
+                "client not found yet: new clients take a few minutes to "
+                "propagate; rerun with --verify-only shortly"
+            ),
+        )
+    if error == "invalid_client":
+        return ProbeResult(
+            ok=False, detail=f"the stored secret is wrong ({description})"
+        )
+    return ProbeResult(ok=False, detail=f"token endpoint: HTTP {status} {body}")
+
+
+def _probe_auth(
+    client: DesktopClient, get: Callable[..., requests.Response]
+) -> ProbeResult:
+    query = urllib.parse.urlencode(
+        {
+            "client_id": client.client_id,
+            "redirect_uri": _PROBE_REDIRECT,
+            "response_type": "code",
+            "scope": "openid email",
+            "code_challenge": challenge_for(_PROBE_VERIFIER),
+            "code_challenge_method": "S256",
+            "hl": "en",
+        }
+    )
+    try:
+        reply = get(
+            f"{AUTH_ENDPOINT}?{query}",
+            allow_redirects=False,
+            timeout=_TIMEOUT_SECONDS,
+        )
+    except requests.RequestException as exc:
+        return ProbeResult(ok=False, detail=f"auth endpoint unreachable: {exc}")
+    return classify_auth_location(reply.headers.get("Location"))
+
+
+def _probe_token(
+    client: DesktopClient, post: Callable[..., requests.Response]
+) -> ProbeResult:
+    try:
+        answer = post(
+            _TOKEN_URL,
+            data={
+                "code": "probe-not-a-real-code",
+                "client_id": client.client_id,
+                "client_secret": client.client_secret,
+                "redirect_uri": _PROBE_REDIRECT,
+                "grant_type": "authorization_code",
+                "code_verifier": _PROBE_VERIFIER,
+            },
+            timeout=_TIMEOUT_SECONDS,
+        )
+    except requests.RequestException as exc:
+        return ProbeResult(ok=False, detail=f"token endpoint unreachable: {exc}")
+    try:
+        body = answer.json()
+    except ValueError:
+        body = None
+    return classify_token(answer.status_code, body)
+
+
+def probe_client(
+    client: DesktopClient,
+    *,
+    get: Callable[..., requests.Response] = requests.get,
+    post: Callable[..., requests.Response] = requests.post,
+) -> list[ProbeResult]:
+    """Run the auth-endpoint and token-endpoint checks for ``client``."""
+    return [_probe_auth(client, get), _probe_token(client, post)]

crdt-sync/tool/desktop_client.py

@@ -0,0 +1,173 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Pick up, validate and store the Desktop OAuth client JSON from the console.
+
+Android and iOS clients download as the same top-level ``installed`` object, so
+the type alone proves nothing: only a ``client_secret`` plus the
+``http://localhost`` redirect marks a Desktop client.
+"""
+
+from __future__ import annotations
+
+import argparse
+from dataclasses import dataclass
+from functools import partial
+import json
+import logging
+import os
+from pathlib import Path
+import sys
+import time
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
+PROJECT_ID = "kuhy-syncs"
+DEFAULT_DEST = Path.home() / ".config" / "crdt-sync" / "desktop_client.json"
+DEFAULT_DOWNLOADS = Path.home() / "Downloads"
+_POLL_SECONDS = 2.0
+_pause_between_polls = partial(time.sleep, _POLL_SECONDS)
+_CLIENT_ID_SUFFIX = ".apps.googleusercontent.com"
+_LOOPBACK_REDIRECT = "http://localhost"
+
+_logger = logging.getLogger("desktop_client")
+
+
+class ClientFileError(Exception):
+    """The client JSON is missing, malformed or not a Desktop client."""
+
+
+@dataclass(frozen=True)
+class DesktopClient:
+    """The installed-app client as downloaded from the console."""
+
+    client_id: str
+    client_secret: str
+    project_id: str
+
+
+@dataclass(frozen=True)
+class Pickup:
+    """A valid client JSON found in the downloads folder."""
+
+    path: Path
+    client: DesktopClient
+
+
+def parse_client_json(text: str, project_id: str = PROJECT_ID) -> DesktopClient:
+    """Return the Desktop client in ``text``, or raise saying what is wrong."""
+    try:
+        document = json.loads(text)
+    except ValueError as exc:
+        msg = f"not valid JSON: {exc}"
+        raise ClientFileError(msg) from exc
+    if not isinstance(document, dict):
+        msg = "must contain a JSON object"
+        raise ClientFileError(msg)
+    installed = document.get("installed")
+    if not isinstance(installed, dict):
+        msg = f"no 'installed' object (found {sorted(document)}); pick 'Desktop app'"
+        raise ClientFileError(msg)
+    if installed.get("project_id") != project_id:
+        msg = f"belongs to project {installed.get('project_id')!r}, not {project_id!r}"
+        raise ClientFileError(msg)
+    client_id = str(installed.get("client_id", ""))
+    if not client_id.endswith(_CLIENT_ID_SUFFIX):
+        msg = f"client_id {client_id!r} is not a Google OAuth client id"
+        raise ClientFileError(msg)
+    held = str(installed.get("client_secret", ""))
+    if not held:
+        msg = "no client_secret: this is an Android/iOS client, not a Desktop app"
+        raise ClientFileError(msg)
+    if _LOOPBACK_REDIRECT not in installed.get("redirect_uris", []):
+        msg = f"redirect_uris lacks {_LOOPBACK_REDIRECT}: not a Desktop app client"
+        raise ClientFileError(msg)
+    return DesktopClient(client_id=client_id, client_secret=held, project_id=project_id)
+
+
+def _scan(
+    downloads: Path, since: float, rejected: set[str], report: Callable[[str], None]
+) -> Pickup | None:
+    candidates = [
+        path
+        for path in downloads.glob("client_secret_*.json")
+        if path.stat().st_mtime >= since
+    ]
+    for path in sorted(candidates, key=lambda p: p.stat().st_mtime, reverse=True):
+        try:
+            client = parse_client_json(path.read_text(encoding="utf-8"))
+        except ClientFileError as exc:
+            if path.name not in rejected:
+                rejected.add(path.name)
+                report(f"ignoring {path.name}: {exc}")
+            continue
+        return Pickup(path=path, client=client)
+    return None
+
+
+def wait_for_client_json(
+    downloads: Path,
+    since: float,
+    *,
+    attempts: int,
+    pause: Callable[[], None] = _pause_between_polls,
+    report: Callable[[str], None] = print,
+) -> Pickup | None:
+    """Scan ``downloads`` up to ``attempts`` times for a JSON newer than ``since``."""
+    rejected: set[str] = set()
+    for attempt in range(attempts):
+        found = _scan(downloads, since, rejected, report)
+        if found:
+            return found
+        if attempt < attempts - 1:
+            pause()
+    return None
+
+
+def store_client(source: Path, dest: Path) -> None:
+    """Move ``source`` to ``dest`` with mode 0600, so no copy lingers in Downloads."""
+    dest.parent.mkdir(parents=True, exist_ok=True)
+    descriptor = os.open(dest, os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o600)
+    with os.fdopen(descriptor, "w", encoding="utf-8") as handle:
+        handle.write(source.read_text(encoding="utf-8"))
+    dest.chmod(0o600)
+    source.unlink()
+
+
+def load_client(dest: Path = DEFAULT_DEST) -> DesktopClient:
+    """Load the stored client, pointing at the register script when absent."""
+    try:
+        return parse_client_json(dest.read_text(encoding="utf-8"))
+    except OSError as exc:
+        msg = f"{dest} unreadable ({exc}); run tool/register_desktop_client.sh"
+        raise ClientFileError(msg) from exc
+
+
+def main(argv: list[str] | None = None) -> int:
+    """Wait for the downloaded JSON and store it. Returns an exit code."""
+    parser = argparse.ArgumentParser(description=__doc__.splitlines()[0])
+    parser.add_argument("action", choices=["pickup"])
+    parser.add_argument("--since", type=float, required=True, help="epoch seconds")
+    parser.add_argument("--timeout", type=float, default=600.0)
+    parser.add_argument("--downloads", type=Path, default=DEFAULT_DOWNLOADS)
+    parser.add_argument("--dest", type=Path, default=DEFAULT_DEST)
+    args = parser.parse_args(argv)
+    logging.basicConfig(stream=sys.stdout, level=logging.INFO, format="%(message)s")
+    found = wait_for_client_json(
+        args.downloads,
+        args.since,
+        attempts=int(args.timeout / _POLL_SECONDS) + 1,
+        report=_logger.info,
+    )
+    if found is None:
+        _logger.error("  FAIL  no Desktop client JSON appeared in %s", args.downloads)
+        return 1
+    store_client(found.path, args.dest)
+    _logger.info(
+        "  PASS  stored %s at %s (mode 600)", found.client.client_id, args.dest
+    )
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

crdt-sync/tool/register_desktop_client.sh

@@ -0,0 +1,127 @@
+#!/bin/bash
+# Registers the Desktop OAuth client (no API exists, so one console step stays
+# manual), stores its JSON privately, then proves Firebase accepts its tokens.
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+readonly SCRIPT_DIR REPO_DIR
+readonly PROJECT="kuhy-syncs"
+readonly ACCOUNT="321krzychu@gmail.com"
+readonly CONSOLE_URL="https://console.cloud.google.com/auth/clients?project=${PROJECT}&authuser=${ACCOUNT}"
+readonly APP_TYPE="Desktop app"
+readonly CLIENT_NAME="crdt-sync desktop/android PKCE"
+readonly PAUSE_SECONDS="${PAUSE_SECONDS:-12}"
+readonly WAIT_SECONDS="${WAIT_SECONDS:-900}"
+readonly PROBE_TRIES="${PROBE_TRIES:-12}"
+readonly PROBE_GAP_SECONDS="${PROBE_GAP_SECONDS:-30}"
+
+log() { printf '\n\033[1m==> %s\033[0m\n' "$1"; }
+step() { printf '   %s\n' "$1"; }
+
+usage() {
+    cat <<EOF
+Usage: $(basename "$0") [--verify-only | --dry-run | --help]
+
+  (no flag)      open the console, clipboard-feed the form, pick up the
+                 downloaded JSON, store it, then verify
+  --verify-only  skip registration; probe, consent flow, signInWithIdp
+  --dry-run      print the plan; open, copy and write nothing
+
+Your part: Application type = Desktop app, paste the name, CREATE, DOWNLOAD
+JSON in the dialog; later tap Allow on the consent page.
+Stored at ~/.config/crdt-sync/desktop_client.json (mode 600).
+EOF
+}
+
+# Prints the value always, so this works over ssh with no X display too.
+clip() {
+    if command -v xclip >/dev/null 2>&1 && [[ -n "${DISPLAY:-}" ]]; then
+        printf '%s' "$1" | xclip -selection clipboard 2>/dev/null || true
+        printf '   \033[32m[copied]\033[0m %s\n' "$1"
+    else
+        printf '   %s\n' "$1"
+    fi
+}
+
+# Without a terminal (e.g. run via `!`) read would hit EOF at once.
+pause() {
+    if [[ -t 0 ]]; then
+        read -rp "   ...press Enter once pasted " _ || true
+    else
+        sleep "$PAUSE_SECONDS"
+    fi
+}
+
+open_console() {
+    if command -v xdg-open >/dev/null 2>&1; then
+        setsid xdg-open "$CONSOLE_URL" >/dev/null 2>&1 &
+    else
+        step "open: $CONSOLE_URL"
+    fi
+}
+
+run_tool() { (cd "$REPO_DIR" && python3 -m "tool.$1" "${@:2}"); }
+
+wait_for_propagation() {
+    local try
+    for ((try = 1; try <= PROBE_TRIES; try++)); do
+        if run_tool verify_desktop_client --probe-only; then
+            return 0
+        fi
+        step "probe $try/$PROBE_TRIES failed; new clients need a few minutes"
+        sleep "$PROBE_GAP_SECONDS"
+    done
+    echo "error: client still not accepted; rerun with --verify-only later" >&2
+    return 1
+}
+
+verify() {
+    log "Verifying: probe, consent flow, Firebase signInWithIdp"
+    step "Tap Allow on the sync account's consent page when it opens."
+    run_tool verify_desktop_client
+}
+
+register() {
+    local started
+    started="$(date +%s)"
+    log "Create ONE Desktop OAuth client in project $PROJECT"
+    open_console
+    sleep 2
+    step "Click '+ CREATE CLIENT'. Application type (paste or pick):"
+    clip "$APP_TYPE"
+    pause
+    step "Field 'Name':"
+    clip "$CLIENT_NAME"
+    pause
+    step "Click CREATE, then DOWNLOAD JSON in the dialog (the secret shows once)."
+    step "Leave the existing Web and Android clients alone."
+    log "Waiting up to ${WAIT_SECONDS}s for the downloaded client_secret_*.json"
+    run_tool desktop_client pickup --since "$started" --timeout "$WAIT_SECONDS"
+    wait_for_propagation
+    verify
+}
+
+dry_run() {
+    log "Dry run: nothing is opened, copied or written"
+    step "page:      $CONSOLE_URL"
+    step "type:      $APP_TYPE"
+    step "name:      $CLIENT_NAME"
+    step "stores at: ~/.config/crdt-sync/desktop_client.json (mode 600)"
+    step "verify:    python3 -m tool.verify_desktop_client (in $REPO_DIR)"
+}
+
+main() {
+    case "${1:-}" in
+        --verify-only) verify ;;
+        --dry-run) dry_run ;;
+        -h | --help) usage ;;
+        "") register ;;
+        *)
+            usage >&2
+            exit 2
+            ;;
+    esac
+}
+
+main "$@"

crdt-sync/tool/verify_desktop_client.py

@@ -0,0 +1,165 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""Prove Firebase accepts an id_token issued to the stored Desktop OAuth client.
+
+Runs the PKCE loopback flow with the installed-app client (secret included in
+the exchange), then calls Firebase Auth REST ``signInWithIdp`` with the result.
+The consent click in the browser is the only human step. No app credential
+file is written: the session lives in memory and is dropped.
+
+Run from the crdt-sync directory::
+
+    python3 -m tool.verify_desktop_client
+"""
+
+from __future__ import annotations
+
+import argparse
+import base64
+import json
+import logging
+import secrets
+import sys
+from typing import TYPE_CHECKING
+
+from crdt_sync._autherrors import FirebaseAuthError
+from crdt_sync._config import ConfigError, FirebaseConfig
+from crdt_sync._credentials import MemoryCredentialStore
+from crdt_sync._firebase_auth import FirebaseTokenProvider
+from tool._oauth_callback import (
+    _CONSENT_TIMEOUT_SECONDS,
+    _CallbackHandler,
+    _free_port,
+    _start_callback_server,
+)
+from tool._pkce import build_consent_url, make_pkce, open_detached
+from tool._token_exchange import TokenError, _authorization_code, _exchange_code
+from tool.client_probe import probe_client
+from tool.desktop_client import ClientFileError, DesktopClient, load_client
+
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
+_logger = logging.getLogger("verify_desktop_client")
+
+
+def audience_of(id_token: str) -> str:
+    """Return the ``aud`` claim of an unverified JWT, or ``?`` if unreadable."""
+    try:
+        segment = id_token.split(".")[1]
+        claims = json.loads(
+            base64.urlsafe_b64decode(segment + "=" * (-len(segment) % 4))
+        )
+        return str(claims["aud"])
+    except IndexError, ValueError, KeyError, TypeError:
+        return "?"
+
+
+def hint_for(message: str) -> str:
+    """Return what to do about a known failure message, or an empty string."""
+    if "audience mismatch" in message:
+        return (
+            "Firebase does not trust this client yet: Firebase console > "
+            "Authentication > Sign-in method > Google > Safelist client IDs "
+            "from external projects, add the Desktop client id, then rerun."
+        )
+    if "wrong account" in message:
+        return (
+            "Pick the sync account in the consent picker (login_hint only "
+            "preselects it). Firebase may have created a stray user for the "
+            "other account: check Authentication > Users."
+        )
+    return ""
+
+
+def fetch_id_token(
+    client: DesktopClient,
+    login_hint: str,
+    *,
+    open_browser: bool = True,
+    opener: Callable[[str], bool] = open_detached,
+) -> str:
+    """Run the PKCE loopback flow with ``client`` and return its id_token."""
+    port = _free_port()
+    redirect_uri = f"http://127.0.0.1:{port}"
+    state = secrets.token_urlsafe(16)
+    pkce = make_pkce()
+    server, thread = _start_callback_server(port, state)
+    url = build_consent_url(
+        client_id=client.client_id,
+        redirect_uri=redirect_uri,
+        challenge=pkce.challenge,
+        state=state,
+        login_hint=login_hint,
+    )
+    _logger.info("  ..  consent page (opened in your browser, tap Allow):")
+    _logger.info("      %s", url)
+    if open_browser:
+        opener(url)
+    thread.join(timeout=_CONSENT_TIMEOUT_SECONDS)
+    server.server_close()
+    code = _authorization_code(_CallbackHandler.result, redirect_uri, state)
+    return _exchange_code(
+        code, client.client_id, client.client_secret, redirect_uri, pkce.verifier
+    )
+
+
+def sign_in(config: FirebaseConfig, id_token: str) -> str:
+    """Call ``signInWithIdp`` in memory; return the account email.
+
+    Raises:
+        FirebaseAuthError: With Firebase's exact message, or on a uid other
+            than the pinned one.
+    """
+    provider = FirebaseTokenProvider(config.api_key, MemoryCredentialStore())
+    return provider.sign_in_with_google(id_token, expected_uid=config.uid)
+
+
+def _fail(message: str) -> int:
+    _logger.error("  FAIL  %s", message)
+    hint = hint_for(message)
+    if hint:
+        _logger.error("  ..    %s", hint)
+    return 1
+
+
+def main(argv: list[str] | None = None) -> int:
+    """Probe the stored client, run the consent flow, sign in to Firebase."""
+    parser = argparse.ArgumentParser(description=__doc__.splitlines()[0])
+    parser.add_argument("--no-browser", action="store_true", help="only print the URL")
+    parser.add_argument(
+        "--skip-probe", action="store_true", help="skip click-free checks"
+    )
+    parser.add_argument(
+        "--probe-only", action="store_true", help="stop after the click-free checks"
+    )
+    args = parser.parse_args(argv)
+    logging.basicConfig(stream=sys.stdout, level=logging.INFO, format="%(message)s")
+
+    try:
+        config = FirebaseConfig.load()
+        client = load_client()
+        if not args.skip_probe:
+            results = probe_client(client)
+            for result in results:
+                _logger.info("  %s  %s", "ok" if result.ok else "!!", result.detail)
+            failed = [r.detail for r in results if not r.ok]
+            if failed:
+                return _fail("; ".join(failed))
+            if args.probe_only:
+                return 0
+        id_token = fetch_id_token(
+            client, config.email, open_browser=not args.no_browser
+        )
+        _logger.info("  ..  id_token audience: %s", audience_of(id_token))
+        email = sign_in(config, id_token)
+    except (ConfigError, ClientFileError, TokenError, FirebaseAuthError) as exc:
+        return _fail(str(exc))
+
+    _logger.info(
+        "  PASS  Firebase accepted the Desktop client: uid %s, %s", config.uid, email
+    )
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

crdt_sync_dart/README.md

@@ -118,6 +118,16 @@ The public/private split is not cosmetic: every repo in this fleet is public.
 APK — the security rules, not secrecy, protect the data. The account email and
 password identify *a person* and are entered once per device.
 
+### Sandbox namespace for test builds
+
+`--dart-define=SYNC_NAMESPACE=sandbox/slot3` moves every RTDB read and write
+under `/sandbox/slot3/...`, so a test build never touches real data. Sign-in
+is unchanged (the real account). Empty, the default, keeps the exact current
+paths. Only `^sandbox/[a-z0-9_-]+$` is accepted; anything else throws
+`ConfigException` at startup (`firebaseClientFor` / `FirebaseRestClient`), never
+falling back to production paths. The shipped rules (root-level uid pin) already
+allow these paths.
+
 ### `password: ''` is legal
 
 The Google one-tap path and the seeded-session path both store an empty

crdt_sync_dart/lib/crdt_sync.dart

@@ -20,4 +20,5 @@ export 'src/remote_store.dart';
 export 'src/secure_credential_store.dart';
 export 'src/store.dart';
 export 'src/sync.dart';
+export 'src/sync_namespace.dart';
 export 'src/sync_state.dart';

crdt_sync_dart/lib/src/firebase_client.dart

@@ -19,6 +19,7 @@ import 'firebase_auth_rest.dart';
 import 'firebase_errors.dart';
 import 'firebase_keys.dart';
 import 'remote_store.dart';
+import 'sync_namespace.dart';
 
 const _httpUnauthorized = 401;
 const _httpForbidden = 403;
@@ -33,13 +34,22 @@ class FirebaseRestClient implements RemoteStore, BulkMapReader {
     required String databaseUrl,
     required this.auth,
     http.Client? httpClient,
+    String namespace = syncNamespace,
   }) : _databaseUrl = databaseUrl.endsWith('/')
            ? databaseUrl.substring(0, databaseUrl.length - 1)
            : databaseUrl,
+       _prefix = _prefixFor(checkSyncNamespace(namespace)),
        _http = httpClient ?? http.Client();
 
   final String _databaseUrl;
 
+  /// `<namespace>/` or empty: put in front of every RTDB path. Every request
+  /// goes through [_uri], so this is the single choke point.
+  final String _prefix;
+
+  static String _prefixFor(String namespace) =>
+      namespace.isEmpty ? '' : '$namespace/';
+
   /// Mints the ID token every request carries. Public so a settings screen
   /// can drive `signIn` / `signOut` through the same instance the client uses.
   final FirebaseTokenProvider auth;
@@ -47,8 +57,12 @@ class FirebaseRestClient implements RemoteStore, BulkMapReader {
 
   Future<Uri> _uri(String path, {Map<String, String> query = const {}}) async {
     final encoded = encodePath(path);
+    // A bare namespace (the root probe) must not leave a trailing slash.
+    final full = encoded.isEmpty && _prefix.isNotEmpty
+        ? _prefix.substring(0, _prefix.length - 1)
+        : '$_prefix$encoded';
     return Uri.parse(
-      '$_databaseUrl/$encoded.json',
+      '$_databaseUrl/$full.json',
     ).replace(queryParameters: {'auth': await auth.idToken(), ...query});
   }
 

crdt_sync_dart/lib/src/firebase_config.dart

@@ -20,6 +20,7 @@ import 'firebase_credentials.dart';
 import 'firebase_client.dart';
 import 'mirror_store.dart';
 import 'remote_store.dart';
+import 'sync_namespace.dart';
 
 /// The shared config is missing a field, or still holds a scaffold placeholder.
 class ConfigException implements Exception {
@@ -121,6 +122,8 @@ Future<FirebaseRestClient> firebaseClientFor({
   String? expectedUid,
   http.Client? httpClient,
 }) async {
+  // Before any sign-in: a bad SYNC_NAMESPACE must stop the app at startup.
+  checkSyncNamespace(syncNamespace);
   final auth = FirebaseTokenProvider(
     apiKey: config.apiKey,
     store: store,

crdt_sync_dart/lib/src/io_store.dart

@@ -7,8 +7,11 @@ import 'store.dart';
 /// Writes atomically -- to a per-process temp file, then `rename`d over the
 /// real path -- so a concurrent reader (e.g. a background sync isolate writing
 /// while the foreground app also writes) never observes a half-written file.
-/// The pid in the temp name keeps two writers from colliding. This generalizes
-/// diet_guard's hand-rolled `LogStorageService` write scheme.
+/// The pid in the temp name keeps two processes from colliding; within one
+/// instance, writes are serialized in issue order (last issued wins), so
+/// overlapping calls (e.g. per-keystroke saves) never share the temp file
+/// mid-flight. This generalizes diet_guard's hand-rolled `LogStorageService`
+/// write scheme.
 ///
 /// Lives behind the `package:crdt_sync/crdt_sync_io.dart` entrypoint, not the
 /// main barrel, because it imports `dart:io` and so is unavailable on web --
@@ -20,6 +23,10 @@ class FileLogPersistence implements LogPersistence {
 
   final File _file;
 
+  /// Completes when the most recently issued write has settled. Never
+  /// rejects, so one failed write cannot block the ones queued after it.
+  Future<void> _tail = Future<void>.value();
+
   @override
   Future<String?> read() async {
     if (!_file.existsSync()) return null;
@@ -31,7 +38,14 @@ class FileLogPersistence implements LogPersistence {
   }
 
   @override
-  Future<void> write(String text) async {
+  Future<void> write(String text) {
+    final result = _tail.then((_) => _writeNow(text));
+    // The caller still sees its own error via [result]; the chain ignores it.
+    _tail = result.then((_) {}, onError: (Object _) {});
+    return result;
+  }
+
+  Future<void> _writeNow(String text) async {
     await _file.parent.create(recursive: true);
     final tmp = File('${_file.path}.$pid.tmp');
     await tmp.writeAsString(text);

crdt_sync_dart/lib/src/sync_namespace.dart

@@ -0,0 +1,26 @@
+/// Compile-time sandbox namespace for the Realtime Database.
+///
+/// Build a test app with `--dart-define=SYNC_NAMESPACE=sandbox/slot3` and every
+/// RTDB path the library reads or writes moves under `/sandbox/slot3/`, so a
+/// test build can never touch real data. Sign-in is unchanged (real account).
+/// Empty, the default, leaves every path exactly as it was.
+library;
+
+import 'firebase_config.dart';
+
+/// The `SYNC_NAMESPACE` dart-define; empty means production paths.
+const String syncNamespace = String.fromEnvironment('SYNC_NAMESPACE');
+
+final RegExp _allowed = RegExp(r'^sandbox/[a-z0-9_-]+$');
+
+/// Returns [namespace] when it is empty or `sandbox/<slot>`, else throws.
+///
+/// Fails closed: a typo must stop the app at startup, never quietly fall back
+/// to production paths. A trailing newline is rejected too.
+String checkSyncNamespace(String namespace) {
+  if (namespace.isEmpty || _allowed.hasMatch(namespace)) return namespace;
+  throw ConfigException(
+    'SYNC_NAMESPACE "$namespace" is invalid: it must be empty or match '
+    r'^sandbox/[a-z0-9_-]+$ (e.g. sandbox/slot3)',
+  );
+}

crdt_sync_dart/pubspec.yaml

@@ -2,7 +2,7 @@ name: crdt_sync
 description: >-
   Shared CRDT merge scheme + GitHub-Contents-API sync transport for
   cross-device apps. Pure Dart, no Flutter dependency.
-version: 0.11.3
+version: 0.12.1
 publish_to: 'none'
 
 environment:

crdt_sync_dart/test/default_client_and_io_test.dart

@@ -128,5 +128,32 @@ void main() {
       await store.write('{"hello":"world"}');
       expect(await store.read(), '{"hello":"world"}');
     });
+
+    test('50 overlapping writes all succeed and the last issued wins',
+        () async {
+      // Regression: every call shared one `<file>.<pid>.tmp`, so the first
+      // rename moved it away and a later rename threw PathNotFoundException.
+      final store = FileLogPersistence(File('${dir.path}/log.json'));
+      await Future.wait([
+        for (var i = 0; i < 50; i++) store.write('{"n":$i}'),
+      ]);
+      expect(await store.read(), '{"n":49}');
+      expect(dir.listSync().map((e) => e.uri.pathSegments.last),
+          ['log.json']);
+    });
+
+    test('a failed write rejects its caller but does not block later writes',
+        () async {
+      final target = File('${dir.path}/log.json');
+      // A directory at the target path makes the rename fail.
+      Directory(target.path).createSync();
+      final store = FileLogPersistence(target);
+      await expectLater(
+          store.write('{"n":0}'), throwsA(isA<FileSystemException>()));
+
+      Directory(target.path).deleteSync();
+      await store.write('{"n":1}');
+      expect(await store.read(), '{"n":1}');
+    });
   });
 }

crdt_sync_dart/test/sync_namespace_test.dart

@@ -0,0 +1,170 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:crdt_sync/crdt_sync.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart' as http_testing;
+import 'package:test/test.dart';
+
+const _databaseUrl = 'https://example-default-rtdb.firebasedatabase.app';
+
+FirebaseTokenProvider _auth() => FirebaseTokenProvider(
+  apiKey: 'fake-api-key',
+  store: InMemoryCredentialStore(
+    FirebaseCredentials(
+      idToken: 'id-token',
+      refreshToken: 'refresh-token',
+      expiresAt: DateTime.utc(2099),
+    ),
+  ),
+  httpClient: http_testing.MockClient(
+    (_) async => throw StateError('auth must not be contacted'),
+  ),
+);
+
+/// Client over an in-memory transport that records every request path.
+(FirebaseRestClient, List<http.Request>) _client(String? namespace) {
+  final requests = <http.Request>[];
+  final mock = http_testing.MockClient((request) async {
+    requests.add(request);
+    return http.Response(jsonEncode(request.method == 'GET' ? null : 'x'), 200);
+  });
+  final client = namespace == null
+      ? FirebaseRestClient(
+          databaseUrl: _databaseUrl,
+          auth: _auth(),
+          httpClient: mock,
+        )
+      : FirebaseRestClient(
+          databaseUrl: _databaseUrl,
+          auth: _auth(),
+          httpClient: mock,
+          namespace: namespace,
+        );
+  return (client, requests);
+}
+
+void main() {
+  group('compile-time default', () {
+    test('is empty when SYNC_NAMESPACE is not defined', () {
+      expect(syncNamespace, isEmpty);
+    });
+
+    test('empty namespace leaves paths byte-for-byte unchanged', () async {
+      final (client, requests) = _client(null);
+      await client.getFileText('devices/pc/log.json');
+      expect(requests.single.url.path, '/devices/pc/log~2Ejson.json');
+    });
+  });
+
+  group('prefixing', () {
+    test('every operation lands under the namespace', () async {
+      final (client, requests) = _client('sandbox/slot3');
+      await client.getFileText('devices/pc/log.json');
+      await client.putFileText('devices/pc/log.json', 't', message: 'm');
+      await client.listDirectory('devices');
+      await client.getStringMap('revs');
+      await client.patchValues('revs', {'a': 'b'});
+      await client.deleteFile('devices/pc/log.json');
+      await client.canAccessRemote();
+      expect(requests.map((r) => r.url.path), [
+        '/sandbox/slot3/devices/pc/log~2Ejson.json',
+        '/sandbox/slot3/devices/pc/log~2Ejson.json',
+        '/sandbox/slot3/devices.json',
+        '/sandbox/slot3/revs.json',
+        '/sandbox/slot3/revs.json',
+        '/sandbox/slot3/devices/pc/log~2Ejson.json',
+        '/sandbox/slot3.json',
+      ]);
+    });
+
+    test('an explicitly empty namespace is the unprefixed path', () async {
+      final (client, requests) = _client('');
+      await client.getStringMap('revs');
+      expect(requests.single.url.path, '/revs.json');
+    });
+  });
+
+  group('validation (fail closed)', () {
+    const bad = [
+      'sandbox',
+      'sandbox/',
+      'sandbox/Slot3',
+      'sandbox/slot 3',
+      'sandbox/slot3/',
+      'sandbox/a/b',
+      '/sandbox/slot3',
+      'prod/slot3',
+      'sandbox/slot3\n',
+      'Sandbox/slot3',
+      'sandbox/slot.3',
+      'sandbox/..',
+    ];
+
+    for (final value in bad) {
+      test('rejects ${jsonEncode(value)}', () {
+        expect(
+          () => checkSyncNamespace(value),
+          throwsA(isA<ConfigException>()),
+        );
+        expect(
+          () => FirebaseRestClient(
+            databaseUrl: _databaseUrl,
+            auth: _auth(),
+            namespace: value,
+          ),
+          throwsA(isA<ConfigException>()),
+        );
+      });
+    }
+
+    test('the message names the define and the required shape', () {
+      expect(
+        () => checkSyncNamespace('typo'),
+        throwsA(
+          isA<ConfigException>().having(
+            (e) => e.message,
+            'message',
+            allOf(
+              contains('SYNC_NAMESPACE'),
+              contains(r'^sandbox/[a-z0-9_-]+$'),
+            ),
+          ),
+        ),
+      );
+    });
+
+    test('accepts the allowed alphabet', () {
+      expect(() => checkSyncNamespace('sandbox/slot3'), returnsNormally);
+      expect(() => checkSyncNamespace('sandbox/a_b-c9'), returnsNormally);
+      expect(() => checkSyncNamespace(''), returnsNormally);
+    });
+
+    test(
+      'a bad compile-time define stops firebaseClientFor at startup',
+      () async {
+        // The define is compile-time, so only a fresh process can set it.
+        final result = await Process.run(Platform.resolvedExecutable, [
+          '-DSYNC_NAMESPACE=sandbox/Typo',
+          'run',
+          'tool/namespace_probe.dart',
+        ]);
+        expect(result.exitCode, isNot(0));
+        expect(
+          result.stderr,
+          contains('SYNC_NAMESPACE "sandbox/Typo" is invalid'),
+        );
+      },
+    );
+
+    test('a good compile-time define reaches the request path', () async {
+      final result = await Process.run(Platform.resolvedExecutable, [
+        '-DSYNC_NAMESPACE=sandbox/slot3',
+        'run',
+        'tool/namespace_probe.dart',
+      ]);
+      expect(result.stderr, isEmpty);
+      expect(result.stdout, '/sandbox/slot3/devices.json\n');
+    });
+  });
+}

crdt_sync_dart/tool/namespace_probe.dart

@@ -0,0 +1,31 @@
+// Helper for test/sync_namespace_test.dart: the SYNC_NAMESPACE define is
+// compile-time, so the test runs this in a fresh process with -D set. It signs
+// in from an in-memory session (no network) and prints the first request path.
+import 'package:crdt_sync/crdt_sync.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart' as http_testing;
+
+Future<void> main() async {
+  final mock = http_testing.MockClient((request) async {
+    print(request.url.path);
+    return http.Response('null', 200);
+  });
+  final client = await firebaseClientFor(
+    config: const FirebaseConfig(
+      apiKey: 'k',
+      databaseUrl: 'https://example.firebasedatabase.app',
+      projectId: 'p',
+      uid: 'u',
+      email: 'e@x.y',
+    ),
+    store: InMemoryCredentialStore(
+      FirebaseCredentials(
+        idToken: 'i',
+        refreshToken: 'r',
+        expiresAt: DateTime.utc(2099),
+      ),
+    ),
+    httpClient: mock,
+  );
+  await client.listDirectory('devices');
+}

crdt_sync_flutter/README.md

@@ -8,7 +8,7 @@ bootstrap, so a new app reaches "syncing" without writing any of it.
 
 `crdt_sync` is pure Dart on purpose — it runs from command-line tools and from
 `wake_alarm`'s headless systemd job, so it cannot depend on
-`flutter_secure_storage` or `google_sign_in`. It takes closures instead.
+`flutter_secure_storage` or the Android Google plugin. It takes closures instead.
 
 Every Flutter app then wrote the same ~390 lines to supply those closures
 (`firebase_backend.dart` + `google_sign_in_backend.dart` + `google_platform*`),
@@ -110,6 +110,11 @@ const kServerClientId = '845446124781-...apps.googleusercontent.com';
 /// to loopback.
 const kDesktopClientId = '845446124781-...apps.googleusercontent.com';
 
+/// That Desktop client's secret. Google rejects the token exchange without
+/// it, but treats it as non-confidential for installed apps: inject it at
+/// build time (`--dart-define`), never commit it. '' sends none.
+const kDesktopClientSecret = String.fromEnvironment('DESKTOP_CLIENT_SECRET');
+
 SyncSettingsScreen(
   accountLoader: () => loadAccount(),
   accountSaver: saveAccount,
@@ -121,6 +126,7 @@ SyncSettingsScreen(
     tokenFetcher: () => googleAnyIdToken(
       serverClientId: kServerClientId,
       desktopClientId: kDesktopClientId,
+      desktopClientSecret: kDesktopClientSecret,
     ),
   ),
   googleAvailable: googleAnySignInSupported(
@@ -132,13 +138,13 @@ SyncSettingsScreen(
 
 ### One tap on every platform
 
-`google_sign_in` ships **android, ios and web** implementations only — there
-is no `google_sign_in_linux` — so a real GTK desktop build cannot use the
-plugin at all. This package covers both halves and picks between them:
+[`google_account_token`](../google_account_token) wraps Android's AccountManager
+(no Google client library in the APK), so a real GTK desktop build cannot use
+it. This package covers both halves and picks between them:
 
 | Platform | Flow | Entry point |
 |---|---|---|
-| Android / iOS | `google_sign_in` plugin, OS account picker | `googleIdToken` |
+| Android | `google_account_token` plugin, OS account chooser | `googleIdToken` |
 | Linux / Windows / macOS | OAuth **loopback** + PKCE, system browser | `googleDesktopIdToken` |
 | Web | none (GIS renders its own button) | falls back to password |
 

crdt_sync_flutter/lib/src/bootstrap.dart

@@ -84,9 +84,9 @@ Future<FirebaseRestClient?> openSync(
 /// Signs in with Google alone, for a device with no account stored yet.
 ///
 /// The one-tap path: [openSync] needs an account to know which email to use,
-/// but a fresh install has none. [tokenFetcher] is the app's `google_sign_in`
-/// call -- a closure because that plugin is Android/iOS/web only and this
-/// package must keep working on Linux desktop.
+/// but a fresh install has none. [tokenFetcher] is the app's Google token
+/// source -- a closure because the Android plugin does not exist elsewhere and
+/// this package must keep working on Linux desktop.
 ///
 /// Returns null when the user dismisses the picker; throws
 /// [FirebaseAuthError] when Google succeeds but resolves to the wrong uid,
@@ -171,8 +171,5 @@ Future<FirebaseRestClient?> _clientFromStoredSession(
     store: keystoreCredentialStore(storage: storage),
   );
   if (!await auth.hasSession()) return null;
-  return FirebaseRestClient(
-    databaseUrl: app.project.databaseUrl,
-    auth: auth,
-  );
+  return FirebaseRestClient(databaseUrl: app.project.databaseUrl, auth: auth);
 }

crdt_sync_flutter/lib/src/google_any_sign_in.dart

@@ -1,8 +1,8 @@
 /// Picks the right Google sign-in flow for the platform.
 ///
-/// Two flows exist because one is not enough: `google_sign_in` ships android,
-/// ios and web implementations only -- there is no `google_sign_in_linux` --
-/// so a real GTK desktop build reaches Google through the OAuth loopback flow
+/// Two flows exist because one is not enough: the `google_account_token`
+/// plugin wraps Android's AccountManager, which has no desktop counterpart, so
+/// a real GTK desktop build reaches Google through the OAuth loopback flow
 /// instead. Both yield a Google ID token of the same shape, so
 /// `signInWithGoogle` cannot tell them apart.
 ///
@@ -48,7 +48,7 @@ bool desktopSignInSupported(String desktopClientId) =>
 /// worth testing, and returning it lets the suite assert the routing on a
 /// host that can run neither flow for real.
 enum GoogleFlow {
-  /// The `google_sign_in` plugin: Android and iOS.
+  /// The `google_account_token` plugin: Android.
   plugin,
 
   /// OAuth loopback in the system browser: Linux, Windows, macOS.
@@ -72,9 +72,13 @@ GoogleFlow googleFlowFor({
 ///
 /// Null when neither is available or the user backs out -- the caller falls
 /// back to the password path either way.
+///
+/// [desktopClientSecret] is the Desktop client's secret (see
+/// `googleDesktopIdToken`); '' sends none.
 Future<String?> googleAnyIdToken({
   required String serverClientId,
   required String desktopClientId,
+  String desktopClientSecret = '',
 }) async {
   switch (googleFlowFor(
     serverClientId: serverClientId,
@@ -87,7 +91,10 @@ Future<String?> googleAnyIdToken({
     case GoogleFlow.plugin:
       return await googleIdToken(serverClientId: serverClientId);
     case GoogleFlow.desktop:
-      return await googleDesktopIdToken(clientId: desktopClientId);
+      return await googleDesktopIdToken(
+        clientId: desktopClientId,
+        clientSecret: desktopClientSecret,
+      );
     // coverage:ignore-end
     case GoogleFlow.none:
       return null;

crdt_sync_flutter/lib/src/google_desktop_sign_in.dart

@@ -1,11 +1,11 @@
 /// One-tap Google sign-in for desktop, via the OAuth loopback flow.
 ///
-/// `google_sign_in` ships android, ios and web implementations only -- there
-/// is no `google_sign_in_linux` -- so a real GTK build cannot use the plugin
-/// at all. The installed-app flow replaces it: bind a loopback socket, open
-/// the system browser at Google's consent screen, catch the redirect, and
-/// exchange the code for an id_token with PKCE. The token is the same shape
-/// the plugin returns, so `signInWithGoogle` cannot tell the two apart.
+/// The Android plugin (`google_account_token`) wraps AccountManager, which
+/// does not exist on Linux, so a real GTK build cannot use it at all. The
+/// installed-app flow replaces it: bind a loopback socket, open the system
+/// browser at Google's consent screen, catch the redirect, and exchange the
+/// code for an id_token with PKCE. The token is the same shape the plugin
+/// returns, so `signInWithGoogle` cannot tell the two apart.
 ///
 /// Everything decision-shaped lives in `google_pkce.dart` and is covered.
 /// This file is the I/O: a socket, a browser, one POST.
@@ -66,8 +66,12 @@ Future<bool> _launchInBrowser(Uri url) =>
 /// [clientId] must be a **Desktop**-type OAuth client. The Web client id used
 /// for the Android flow will be rejected here, and a Desktop client is the
 /// only type permitted to redirect to loopback.
+///
+/// [clientSecret] is that client's secret; Google's token endpoint rejects a
+/// Desktop exchange without it. See `tokenExchangeBody`.
 Future<String?> googleDesktopIdToken({
   required String clientId,
+  String clientSecret = '',
   ServerBinder binder = _bindLoopback,
   BrowserLauncher launcher = _launchInBrowser,
   http.Client? httpClient,
@@ -83,11 +87,7 @@ Future<String?> googleDesktopIdToken({
   final client = httpClient ?? http.Client();
   try {
     final opened = await launcher(
-      buildAuthUrl(
-        clientId: clientId,
-        redirectPort: port,
-        pkce: pair,
-      ),
+      buildAuthUrl(clientId: clientId, redirectPort: port, pkce: pair),
     );
     // No browser means no redirect will ever arrive: fail now rather than
     // holding the socket open for the full timeout.
@@ -99,6 +99,7 @@ Future<String?> googleDesktopIdToken({
     return await _exchange(
       client: client,
       clientId: clientId,
+      clientSecret: clientSecret,
       code: code,
       port: port,
       verifier: pair.verifier,
@@ -136,6 +137,7 @@ Future<String?> _awaitRedirect(
 Future<String?> _exchange({
   required http.Client client,
   required String clientId,
+  required String clientSecret,
   required String code,
   required int port,
   required String verifier,
@@ -144,6 +146,7 @@ Future<String?> _exchange({
     Uri.parse(kGoogleTokenEndpoint),
     body: tokenExchangeBody(
       clientId: clientId,
+      clientSecret: clientSecret,
       code: code,
       redirectPort: port,
       verifier: verifier,

crdt_sync_flutter/lib/src/google_pkce.dart

@@ -136,13 +136,21 @@ RedirectResult parseRedirect(Uri uri, {required String expectedState}) {
 }
 
 /// Form body for exchanging [code] at [kGoogleTokenEndpoint].
+///
+/// [clientSecret] is the Desktop client's secret. Google issues Desktop
+/// clients one and rejects the exchange without it even with PKCE, but
+/// documents it as non-confidential for installed apps: it ships in the
+/// binary, injected at build time and never committed. Left out of the body
+/// when empty, so a caller that has none behaves exactly as before.
 Map<String, String> tokenExchangeBody({
   required String clientId,
   required String code,
   required int redirectPort,
   required String verifier,
+  String clientSecret = '',
 }) => <String, String>{
   'client_id': clientId,
+  if (clientSecret.isNotEmpty) 'client_secret': clientSecret,
   'code': code,
   'code_verifier': verifier,
   'grant_type': 'authorization_code',

crdt_sync_flutter/lib/src/google_platform.dart

@@ -1,10 +1,8 @@
 /// Platform gate for the programmatic Google sign-in flow.
 ///
-/// Conditional export because the answer differs per platform *and* because
-/// asking the plugin directly is unsafe: `supportsAuthenticate()` throws
-/// `UnimplementedError` where no implementation is registered -- an `Error`,
-/// not an `Exception`, so it escapes an ordinary catch and would take down
-/// the settings screen's `build()`.
+/// Conditional export because the answer differs per platform: the io half
+/// defers to the `google_account_token` plugin (Android only), the web half is
+/// a constant false.
 library;
 
 export 'google_platform_io.dart'

crdt_sync_flutter/lib/src/google_platform_io.dart

@@ -1,15 +1,18 @@
 /// Whether the programmatic Google sign-in flow exists on this platform.
 ///
-/// The io half. `google_sign_in` ships federated implementations for android,
-/// ios and web only -- there is no `google_sign_in_linux` -- so a real GTK
-/// desktop build (lyricanki has one) answers false here and reaches Google
-/// through the loopback flow instead.
+/// The io half. The flow is the `google_account_token` plugin, which wraps the
+/// framework AccountManager and therefore exists on Android only. Every other
+/// `dart:io` platform (Linux, Windows, macOS) reaches Google through the
+/// loopback flow instead.
 library;
 
-import 'dart:io';
+import 'package:google_account_token/google_account_token.dart';
 
-/// True on the platforms shipping the programmatic plugin flow.
-bool get googleSignInSupported => Platform.isAndroid || Platform.isIOS;
+/// True where the one-tap AccountManager flow exists: Android.
+///
+/// Asks the plugin rather than `Platform.isAndroid` so the two can never
+/// disagree about where a token can be produced.
+bool get googleSignInSupported => googleAccountTokenSupported;
 
 /// Whether the loopback sign-in flow can run: it needs a bindable socket and
 /// a system browser, which every `dart:io` platform has.

crdt_sync_flutter/lib/src/google_sign_in.dart

@@ -1,8 +1,8 @@
-/// One-tap Google sign-in: the `google_sign_in` plugin call, owned once.
+/// One-tap Google sign-in: the `google_account_token` plugin call, owned once.
 ///
 /// Why it lives here and not in `crdt_sync`: that package is pure Dart on
 /// purpose, because the same library runs on Linux desktop and headless under
-/// systemd, where `google_sign_in` does not exist. It only ever receives a
+/// systemd, where the Android plugin does not exist. It only ever receives a
 /// token string through a closure -- see `signInWithGoogle`, which takes a
 /// `tokenFetcher`. This file is that closure.
 ///
@@ -11,10 +11,8 @@
 /// time is the mistake this package exists to prevent.
 library;
 
-import 'dart:developer';
-
 import 'package:crdt_sync_flutter/src/google_platform.dart' as platform_gate;
-import 'package:google_sign_in/google_sign_in.dart';
+import 'package:google_account_token/google_account_token.dart' as account;
 
 /// Whether this build can sign in with Google programmatically.
 ///
@@ -33,56 +31,21 @@ bool googleSignInSupported(String serverClientId) =>
 
 /// Returns a Google ID token for the signed-in account, or null.
 ///
-/// Null rather than throwing when the user dismisses the picker: cancelling is
-/// an ordinary outcome, and the caller falls back to the password path.
+/// Null rather than throwing when the user dismisses the chooser: cancelling
+/// is an ordinary outcome, and the caller falls back to the password path.
+/// The plugin logs (level 900) every failure, which matters because a
+/// *configuration* failure (unregistered SHA-1, wrong client id) arrives
+/// through the same path as "the user changed their mind".
 ///
-/// [serverClientId] must be the project's **Web** OAuth client id -- Android
-/// must request a token minted for the web client, and an Android client id
-/// yields a token Firebase rejects with `audience mismatch`.
+/// [serverClientId] must be the project's **Web** OAuth client id -- the token
+/// is minted for that audience, and an Android client id yields one Firebase
+/// rejects with `audience mismatch`.
 ///
-/// [signInFn] exists for tests, which cannot reach the plugin's platform
-/// channel; when supplied it replaces the plugin entirely.
+/// [signInFn] exists for tests; when supplied it replaces the plugin entirely.
 Future<String?> googleIdToken({
   required String serverClientId,
   Future<String?> Function()? signInFn,
 }) async {
   if (signInFn != null) return await signInFn();
-  if (serverClientId.isEmpty) {
-    log(
-      'Google sign-in unavailable: no server client id was compiled in; '
-      'falling back to the password path',
-      level: 900,
-    );
-    return null;
-  }
-  // The plugin reaches the OS account picker through a platform channel,
-  // which `flutter test` has no binding for. Everything above this point is
-  // pure Dart and is covered.
-  // coverage:ignore-start
-  try {
-    await GoogleSignIn.instance.initialize(serverClientId: serverClientId);
-    if (!GoogleSignIn.instance.supportsAuthenticate()) {
-      log(
-        'Google sign-in is not available on this platform; falling back to '
-        'the password path',
-        level: 900,
-      );
-      return null;
-    }
-    final account = await GoogleSignIn.instance.authenticate();
-    return account.authentication.idToken;
-  } on GoogleSignInException catch (error, stackTrace) {
-    // Includes the user simply dismissing the picker, which is not an error
-    // worth surfacing -- but log it, because a *configuration* failure
-    // (unregistered SHA-1, wrong client id) arrives through the same path and
-    // is otherwise indistinguishable from "the user changed their mind".
-    log(
-      'Google sign-in did not complete',
-      level: 900,
-      error: error,
-      stackTrace: stackTrace,
-    );
-    return null;
-  }
-  // coverage:ignore-end
+  return await account.googleIdToken(serverClientId: serverClientId);
 }

crdt_sync_flutter/pubspec.lock

@@ -61,11 +61,11 @@ packages:
     dependency: "direct main"
     description:
       path: crdt_sync_dart
-      ref: "crdt_sync_dart-v0.11.3"
-      resolved-ref: a2e7334dfec5131170a084510d70361d53dc40bc
+      ref: "crdt_sync_dart-v0.12.0"
+      resolved-ref: "59b33949e4a130bb76c77e7434ddf4bbf8cde3a3"
       url: "https://github.com/kuhyx/utils"
     source: git
-    version: "0.11.3"
+    version: "0.12.0"
   crypto:
     dependency: "direct main"
     description:
@@ -177,54 +177,15 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  google_identity_services_web:
-    dependency: transitive
-    description:
-      name: google_identity_services_web
-      sha256: "5d187c46dc59e02646e10fe82665fc3884a9b71bc1c90c2b8b749316d33ee454"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.3.3+1"
-  google_sign_in:
+  google_account_token:
     dependency: "direct main"
     description:
-      name: google_sign_in
-      sha256: "521031b65853b4409b8213c0387d57edaad7e2a949ce6dea0d8b2afc9cb29763"
-      url: "https://pub.dev"
-    source: hosted
-    version: "7.2.0"
-  google_sign_in_android:
-    dependency: transitive
-    description:
-      name: google_sign_in_android
-      sha256: "57782125965ca87b03d42a147d40b046f1fd6a09141a58913e1b86671a5ef22e"
-      url: "https://pub.dev"
-    source: hosted
-    version: "7.2.16"
-  google_sign_in_ios:
-    dependency: transitive
-    description:
-      name: google_sign_in_ios
-      sha256: ac1e4c1205267cb7999d1d81333fccffdfda29e853f434bbaf71525498bb6950
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.3.0"
-  google_sign_in_platform_interface:
-    dependency: transitive
-    description:
-      name: google_sign_in_platform_interface
-      sha256: "7f59208c42b415a3cca203571128d6f84f885fead2d5b53eb65a9e27f2965bb5"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.0"
-  google_sign_in_web:
-    dependency: transitive
-    description:
-      name: google_sign_in_web
-      sha256: d473003eeca892f96a01a64fc803378be765071cb0c265ee872c7f8683245d14
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.3"
+      path: google_account_token
+      ref: "google_account_token-v0.1.0"
+      resolved-ref: db70ba204d124c6eadf9b8808cd3d3b3e70363d1
+      url: "https://github.com/kuhyx/utils"
+    source: git
+    version: "0.1.0"
   hooks:
     dependency: transitive
     description:

crdt_sync_flutter/pubspec.yaml

@@ -4,7 +4,7 @@ description: >-
   persisted per-install device id, and a one-call bootstrap. Removes the
   ~150 lines of firebase_backend.dart every consuming app was copying.
 publish_to: 'none'
-version: 0.3.5
+version: 0.5.1
 
 environment:
   sdk: ^3.12.2
@@ -13,7 +13,7 @@ dependencies:
   crdt_sync:
     git:
       url: https://github.com/kuhyx/utils
-      ref: crdt_sync_dart-v0.11.3
+      ref: crdt_sync_dart-v0.12.1
       path: crdt_sync_dart
   crypto: 3.0.8
   flutter:
@@ -23,10 +23,15 @@ dependencies:
   # consuming apps can test their own sync wiring without rebuilding it.
   flutter_test:
     sdk: flutter
-  # The one-tap Google plugin. Android/iOS/web only -- there is no Linux
-  # implementation -- so desktop reaches Google through the loopback flow in
+  # The one-tap Google ID token on Android: AccountManager chooser, no Google
+  # client library in the APK. Android only -- web has no token source and
+  # desktop reaches Google through the loopback flow in
   # google_desktop_sign_in.dart instead. See google_platform.dart.
-  google_sign_in: 7.2.0
+  google_account_token:
+    git:
+      url: https://github.com/kuhyx/utils
+      ref: google_account_token-v0.1.0
+      path: google_account_token
   http: 1.6.0
   shared_preferences: 2.5.6
   # Opens the system browser for the desktop loopback sign-in.

crdt_sync_flutter/test/google_any_sign_in_test.dart

@@ -1,11 +1,23 @@
 import 'package:crdt_sync_flutter/crdt_sync_flutter.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:google_account_token/google_account_token.dart'
+    show kGoogleAccountTokenChannel;
 
 void main() {
-  // Under `flutter test` the io platform gate answers for the host, which is
-  // Linux -- so the plugin half is false and the loopback half is live. That
-  // is the desktop configuration, and it is the one this suite can exercise
-  // honestly; the Android half is asserted on the device instead.
+  TestWidgetsFlutterBinding.ensureInitialized();
+  // `flutter test` reports Android as the default target platform, so the
+  // desktop configuration this suite exercises is pinned explicitly: the
+  // plugin half is false and the loopback half is live. The Android routing
+  // has its own group at the bottom.
+  setUp(() => debugDefaultTargetPlatformOverride = TargetPlatform.linux);
+  tearDown(() {
+    debugDefaultTargetPlatformOverride = null;
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(kGoogleAccountTokenChannel, null);
+  });
+
   group('desktopSignInSupported', () {
     test('is true on this host once a desktop client id exists', () {
       expect(desktopSignInSupported('desktop-cid'), isTrue);
@@ -90,4 +102,35 @@ void main() {
       );
     });
   });
+
+  group('on Android', () {
+    setUp(() => debugDefaultTargetPlatformOverride = TargetPlatform.android);
+
+    test('the plugin flow wins and the desktop one is off', () {
+      expect(
+        googleFlowFor(serverClientId: 'web-cid', desktopClientId: 'd'),
+        GoogleFlow.plugin,
+      );
+      expect(desktopSignInSupported('d'), isFalse);
+      expect(
+        googleAnySignInSupported(
+          serverClientId: 'web-cid',
+          desktopClientId: '',
+        ),
+        isTrue,
+      );
+    });
+
+    test('googleAnyIdToken reaches the AccountManager plugin', () async {
+      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+          .setMockMethodCallHandler(
+            kGoogleAccountTokenChannel,
+            (_) async => 'native-token',
+          );
+      expect(
+        await googleAnyIdToken(serverClientId: 'web-cid', desktopClientId: ''),
+        'native-token',
+      );
+    });
+  });
 }

crdt_sync_flutter/test/google_desktop_sign_in_test.dart

@@ -23,9 +23,9 @@ BrowserLauncher _respondingLauncher(
   final state = url.queryParameters['state']!;
   unawaited(
     http.get(
-      Uri.parse('http://127.0.0.1:$port/').replace(
-        queryParameters: params(state),
-      ),
+      Uri.parse(
+        'http://127.0.0.1:$port/',
+      ).replace(queryParameters: params(state)),
     ),
   );
   return true;
@@ -54,6 +54,22 @@ void main() {
     expect(sentBody['code_verifier'], 'v');
   });
 
+  test('sends the configured client_secret in the exchange', () async {
+    late Map<String, String> sentBody;
+    final client = MockClient((request) async {
+      sentBody = Uri.splitQueryString(request.body);
+      return http.Response('{"id_token":"t"}', 200);
+    });
+    await googleDesktopIdToken(
+      clientId: 'desktop-cid',
+      clientSecret: 'shh',
+      binder: _bind,
+      launcher: _respondingLauncher((state) => {'code': 'c', 'state': state}),
+      httpClient: client,
+    );
+    expect(sentBody['client_secret'], 'shh');
+  });
+
   test('returns null when the user denies consent', () async {
     final token = await googleDesktopIdToken(
       clientId: 'cid',
@@ -99,9 +115,7 @@ void main() {
     final token = await googleDesktopIdToken(
       clientId: 'cid',
       binder: _bind,
-      launcher: _respondingLauncher(
-        (state) => {'code': 'c', 'state': state},
-      ),
+      launcher: _respondingLauncher((state) => {'code': 'c', 'state': state}),
       httpClient: MockClient(
         (_) async => http.Response('{"error":"invalid_grant"}', 400),
       ),

crdt_sync_flutter/test/google_pkce_test.dart

@@ -142,6 +142,29 @@ void main() {
     expect(body['redirect_uri'], 'http://127.0.0.1:9');
   });
 
+  test('tokenExchangeBody omits client_secret when none is configured', () {
+    final body = tokenExchangeBody(
+      clientId: 'cid',
+      code: 'c',
+      redirectPort: 9,
+      verifier: 'v',
+    );
+    expect(body.containsKey('client_secret'), isFalse);
+  });
+
+  test('tokenExchangeBody sends the Desktop client_secret when given', () {
+    // Google issues Desktop clients a secret and rejects the exchange
+    // without it, even with PKCE.
+    final body = tokenExchangeBody(
+      clientId: 'cid',
+      clientSecret: 'the-secret',
+      code: 'c',
+      redirectPort: 9,
+      verifier: 'v',
+    );
+    expect(body['client_secret'], 'the-secret');
+  });
+
   group('idTokenFromResponse', () {
     test('reads the id_token', () {
       expect(idTokenFromResponse('{"id_token":"tok"}'), 'tok');

crdt_sync_flutter/test/google_sign_in_test.dart

@@ -1,18 +1,39 @@
 import 'package:crdt_sync_flutter/crdt_sync_flutter.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:google_account_token/google_account_token.dart'
+    show kGoogleAccountTokenChannel;
 
 void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  final messenger =
+      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger;
+
+  tearDown(() {
+    debugDefaultTargetPlatformOverride = null;
+    messenger.setMockMethodCallHandler(kGoogleAccountTokenChannel, null);
+  });
+
   group('googleSignInSupported', () {
+    test('is true on Android once a client id is present', () {
+      debugDefaultTargetPlatformOverride = TargetPlatform.android;
+      expect(googleSignInSupported('some-client-id'), isTrue);
+    });
+
+    test('is false on iOS: AccountManager is Android-only', () {
+      debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+      expect(googleSignInSupported('some-client-id'), isFalse);
+    });
+
     test('is false without a client id, whatever the platform', () {
       // The guard that stops a build which forgot the constant from showing a
       // button that can only ever report "cancelled".
       expect(googleSignInSupported(''), isFalse);
     });
 
-    test('follows the platform gate once a client id is present', () {
-      // Under `flutter test` the io half answers for the host, which is not
-      // Android -- so this is false here and true on a real handset. Asserting
-      // the platform's own answer keeps the test honest on every host.
+    test('is false on a desktop host even with a client id', () {
+      debugDefaultTargetPlatformOverride = TargetPlatform.linux;
       expect(googleSignInSupported('some-client-id'), isFalse);
     });
   });
@@ -40,4 +61,30 @@ void main() {
       expect(await googleIdToken(serverClientId: ''), isNull);
     });
   });
+
+  group('googleIdToken through the AccountManager plugin', () {
+    setUp(() => debugDefaultTargetPlatformOverride = TargetPlatform.android);
+
+    test('asks the native side for a token for the web client', () async {
+      MethodCall? seen;
+      messenger.setMockMethodCallHandler(kGoogleAccountTokenChannel, (
+        call,
+      ) async {
+        seen = call;
+        return 'native-token';
+      });
+      final token = await googleIdToken(serverClientId: 'web-cid');
+      expect(token, 'native-token');
+      expect(seen?.method, 'idToken');
+      expect(seen?.arguments, {'serverClientId': 'web-cid'});
+    });
+
+    test('a failing native side is null, not a throw', () async {
+      messenger.setMockMethodCallHandler(
+        kGoogleAccountTokenChannel,
+        (_) async => throw PlatformException(code: 'auth_failed'),
+      );
+      expect(await googleIdToken(serverClientId: 'web-cid'), isNull);
+    });
+  });
 }

data_transfer_flutter/README.md

@@ -11,7 +11,7 @@ dependencies:
   data_transfer_flutter:
     git:
       url: https://github.com/kuhyx/utils
-      ref: data_transfer_flutter-v0.1.0
+      ref: data_transfer_flutter-v0.2.1
       path: data_transfer_flutter
 ```
 
@@ -26,6 +26,7 @@ final map = await pickJson(); // null when cancelled
   use the system "Save as" document picker (`file_picker` `saveFile`, i.e.
   ACTION_CREATE_DOCUMENT), desktop a save dialog (`file_selector`), web a
   browser download. Returns false when cancelled.
+- `exportTextFile` does the same for any text (`text/csv`, `text/calendar`).
 - `shareJson` is an optional second action (share sheet). It is never the
   only way out: a stock phone's share sheet has no local save target.
 - `pickJson` / `pickJsonText` use the system open-document picker.

data_transfer_flutter/lib/src/json_type_group.dart

@@ -9,3 +9,19 @@ const jsonTypeGroup = XTypeGroup(
   uniformTypeIdentifiers: ['public.json'],
   mimeTypes: ['application/json'],
 );
+
+/// The save-dialog filter for [fileName] holding [mimeType] data.
+///
+/// Keyed on the file's own extension so a CSV export is not offered under a
+/// JSON filter; a name with no extension accepts any type.
+XTypeGroup saveTypeGroup(String fileName, String mimeType) {
+  final dot = fileName.lastIndexOf('.');
+  final extension = dot > 0 && dot < fileName.length - 1
+      ? fileName.substring(dot + 1).toLowerCase()
+      : null;
+  return XTypeGroup(
+    label: extension?.toUpperCase(),
+    extensions: extension == null ? null : [extension],
+    mimeTypes: [mimeType],
+  );
+}

data_transfer_flutter/lib/src/platform.dart

@@ -9,14 +9,22 @@ abstract interface class DataTransferPlatform {
   /// Android/iOS: the system "Save as" document picker (device storage).
   /// Desktop: a save dialog. Web: a browser download. Returns false when the
   /// user cancelled.
-  Future<bool> saveText({required String fileName, required String text});
+  Future<bool> saveText({
+    required String fileName,
+    required String text,
+    String mimeType = 'application/json',
+  });
 
   /// Offers [text] as [fileName] to the share sheet, where the host has one.
   ///
   /// A second action only: a share sheet can route the data to cloud apps, so
   /// it never replaces [saveText]. Hosts without a sheet fall back to
   /// [saveText].
-  Future<bool> shareText({required String fileName, required String text});
+  Future<bool> shareText({
+    required String fileName,
+    required String text,
+    String mimeType = 'application/json',
+  });
 
   /// Opens the system open-document picker and returns the file's text, or
   /// null when the user cancelled.

data_transfer_flutter/lib/src/platform_io.dart

@@ -12,11 +12,19 @@ import 'package:share_plus/share_plus.dart';
 
 /// Writes [bytes] through the system "Save as" picker; false on cancel.
 typedef DocumentSaver =
-    Future<bool> Function({required String fileName, required Uint8List bytes});
+    Future<bool> Function({
+      required String fileName,
+      required Uint8List bytes,
+      required String mimeType,
+    });
 
 /// Offers [text] as a file named [fileName] to the share sheet.
 typedef SheetSharer =
-    Future<bool> Function({required String fileName, required String text});
+    Future<bool> Function({
+      required String fileName,
+      required String text,
+      required String mimeType,
+    });
 
 /// The platform for hosts that have `dart:io`.
 DataTransferPlatform createDefaultPlatform() => IoDataTransferPlatform();
@@ -46,16 +54,18 @@ class IoDataTransferPlatform implements DataTransferPlatform {
   Future<bool> saveText({
     required String fileName,
     required String text,
+    String mimeType = 'application/json',
   }) async {
     if (_isMobile) {
       return await _documentSaver(
         fileName: fileName,
         bytes: Uint8List.fromList(utf8.encode(text)),
+        mimeType: mimeType,
       );
     }
     final location = await getSaveLocation(
       suggestedName: fileName,
-      acceptedTypeGroups: const [jsonTypeGroup],
+      acceptedTypeGroups: [saveTypeGroup(fileName, mimeType)],
     );
     if (location == null) return false;
     await File(location.path).writeAsString(text);
@@ -63,10 +73,13 @@ class IoDataTransferPlatform implements DataTransferPlatform {
   }
 
   @override
-  Future<bool> shareText({required String fileName, required String text}) =>
-      _isMobile
-      ? _sheetSharer(fileName: fileName, text: text)
-      : saveText(fileName: fileName, text: text);
+  Future<bool> shareText({
+    required String fileName,
+    required String text,
+    String mimeType = 'application/json',
+  }) => _isMobile
+      ? _sheetSharer(fileName: fileName, text: text, mimeType: mimeType)
+      : saveText(fileName: fileName, text: text, mimeType: mimeType);
 
   @override
   Future<String?> pickText() async {
@@ -81,11 +94,12 @@ class IoDataTransferPlatform implements DataTransferPlatform {
 Future<bool> _saveViaDocumentPicker({
   required String fileName,
   required Uint8List bytes,
+  required String mimeType,
 }) async {
   final saved = await FilePicker.saveFile(
     fileName: fileName,
     bytes: bytes,
-    mimeType: 'application/json',
+    mimeType: mimeType,
   );
   return saved != null;
 }
@@ -93,12 +107,13 @@ Future<bool> _saveViaDocumentPicker({
 Future<bool> _shareViaSheet({
   required String fileName,
   required String text,
+  required String mimeType,
 }) async {
   final dir = await getTemporaryDirectory();
   final file = File(p.join(dir.path, fileName));
   await file.writeAsString(text);
   await SharePlus.instance.share(
-    ShareParams(files: [XFile(file.path, mimeType: 'application/json')]),
+    ShareParams(files: [XFile(file.path, mimeType: mimeType)]),
   );
   return true;
 }

data_transfer_flutter/lib/src/platform_web.dart

@@ -16,20 +16,24 @@ class WebDataTransferPlatform implements DataTransferPlatform {
   Future<bool> saveText({
     required String fileName,
     required String text,
+    String mimeType = 'application/json',
   }) async {
     // `saveTo` on web clicks a synthetic anchor: the path is ignored and the
     // browser's download UI decides where the file lands.
     await XFile.fromData(
       utf8.encode(text),
-      mimeType: 'application/json',
+      mimeType: mimeType,
       name: fileName,
     ).saveTo('');
     return true;
   }
 
   @override
-  Future<bool> shareText({required String fileName, required String text}) =>
-      saveText(fileName: fileName, text: text);
+  Future<bool> shareText({
+    required String fileName,
+    required String text,
+    String mimeType = 'application/json',
+  }) => saveText(fileName: fileName, text: text, mimeType: mimeType);
 
   @override
   Future<String?> pickText() async {

data_transfer_flutter/lib/src/transfer.dart

@@ -21,7 +21,19 @@ Future<bool> exportJson({
 
 /// [exportJson] for an already-encoded JSON string.
 Future<bool> exportJsonText({required String fileName, required String text}) =>
-    DataTransfer.platform.saveText(fileName: fileName, text: text);
+    exportTextFile(fileName: fileName, text: text);
+
+/// Saves any text file ([mimeType], e.g. `text/csv`) to device storage, with
+/// the same host behaviour as [exportJson]. False when cancelled.
+Future<bool> exportTextFile({
+  required String fileName,
+  required String text,
+  String mimeType = 'application/json',
+}) => DataTransfer.platform.saveText(
+  fileName: fileName,
+  text: text,
+  mimeType: mimeType,
+);
 
 /// Optional second action: offers [json] to the share sheet.
 Future<bool> shareJson({

data_transfer_flutter/pubspec.yaml

@@ -4,13 +4,13 @@ description: >-
   Flutter apps: system Save-as on Android/iOS (never cloud-only), a save
   dialog on desktop, a download on web, plus a versioned export envelope.
 publish_to: 'none'
-version: 0.1.0
+version: 0.2.2
 
 environment:
   sdk: ^3.12.2
 
 dependencies:
-  file_picker: 13.3.1
+  file_picker: 13.3.3
   file_selector: 1.1.0
   flutter:
     sdk: flutter

data_transfer_flutter/test/io_platform_test.dart

@@ -2,6 +2,7 @@ import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
 
+import 'package:data_transfer_flutter/src/json_type_group.dart';
 import 'package:data_transfer_flutter/src/platform_io.dart';
 import 'package:file_selector_platform_interface/file_selector_platform_interface.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -46,6 +47,17 @@ void main() {
   group('desktop', () {
     final desktop = IoDataTransferPlatform(isMobile: false);
 
+    test('the save dialog is typed by the file name and mime type', () {
+      final group = saveTypeGroup('punchme.csv', 'text/csv');
+
+      expect(group.extensions, ['csv']);
+      expect(group.mimeTypes, ['text/csv']);
+    });
+
+    test('a name without an extension accepts any type', () {
+      expect(saveTypeGroup('README', 'text/plain').extensions, isNull);
+    });
+
     test('save writes to the chosen path and suggests the name', () async {
       final path = '${temp.path}/out.json';
       selector.saveLocation = FileSaveLocation(path);
@@ -91,20 +103,28 @@ void main() {
       'save hands UTF-8 bytes to the document saver, not file_selector',
       () async {
         String? name;
+        String? mime;
         List<int>? captured;
         final mobile = IoDataTransferPlatform(
           isMobile: true,
-          documentSaver: ({required fileName, required bytes}) async {
-            name = fileName;
-            captured = bytes;
-            return true;
-          },
+          documentSaver:
+              ({required fileName, required bytes, required mimeType}) async {
+                name = fileName;
+                mime = mimeType;
+                captured = bytes;
+                return true;
+              },
         );
 
-        final saved = await mobile.saveText(fileName: 'm.json', text: 'zażółć');
+        final saved = await mobile.saveText(
+          fileName: 'm.json',
+          text: 'zażółć',
+          mimeType: 'text/csv',
+        );
 
         expect(saved, isTrue);
         expect(name, 'm.json');
+        expect(mime, 'text/csv');
         expect(utf8.decode(captured!), 'zażółć');
         expect(selector.saveRequests, isEmpty);
       },
@@ -113,7 +133,9 @@ void main() {
     test('a cancelled document picker reports false', () async {
       final mobile = IoDataTransferPlatform(
         isMobile: true,
-        documentSaver: ({required fileName, required bytes}) async => false,
+        documentSaver:
+            ({required fileName, required bytes, required mimeType}) async =>
+                false,
       );
 
       expect(await mobile.saveText(fileName: 'm.json', text: '{}'), isFalse);
@@ -121,16 +143,20 @@ void main() {
 
     test('share goes through the share sheet seam', () async {
       (String, String)? seen;
+      String? sharedMime;
       final mobile = IoDataTransferPlatform(
         isMobile: true,
-        sheetSharer: ({required fileName, required text}) async {
-          seen = (fileName, text);
-          return true;
-        },
+        sheetSharer:
+            ({required fileName, required text, required mimeType}) async {
+              seen = (fileName, text);
+              sharedMime = mimeType;
+              return true;
+            },
       );
 
       expect(await mobile.shareText(fileName: 's.json', text: '1'), isTrue);
       expect(seen, ('s.json', '1'));
+      expect(sharedMime, 'application/json');
     });
   });
 }

data_transfer_flutter/test/support/fake_platform.dart

@@ -11,6 +11,9 @@ class FakePlatform implements DataTransferPlatform {
   /// `(fileName, text)` of every [saveText] call.
   final saves = <(String, String)>[];
 
+  /// The mime type of every [saveText] call, in order.
+  final saveMimes = <String>[];
+
   /// `(fileName, text)` of every [shareText] call.
   final shares = <(String, String)>[];
 
@@ -18,8 +21,10 @@ class FakePlatform implements DataTransferPlatform {
   Future<bool> saveText({
     required String fileName,
     required String text,
+    String mimeType = 'application/json',
   }) async {
     saves.add((fileName, text));
+    saveMimes.add(mimeType);
     return accept;
   }
 
@@ -27,6 +32,7 @@ class FakePlatform implements DataTransferPlatform {
   Future<bool> shareText({
     required String fileName,
     required String text,
+    String mimeType = 'application/json',
   }) async {
     shares.add((fileName, text));
     return accept;

data_transfer_flutter/test/transfer_test.dart

@@ -45,6 +45,26 @@ void main() {
     });
   });
 
+  group('exportTextFile', () {
+    test('saves non-JSON text with its own mime type', () async {
+      final saved = await exportTextFile(
+        fileName: 'a.csv',
+        text: 'a,b\n',
+        mimeType: 'text/csv',
+      );
+
+      expect(saved, isTrue);
+      expect(fake.saves.single, ('a.csv', 'a,b\n'));
+      expect(fake.saveMimes.single, 'text/csv');
+    });
+
+    test('exportJsonText keeps the JSON mime type', () async {
+      await exportJsonText(fileName: 'a.json', text: '{}');
+
+      expect(fake.saveMimes.single, 'application/json');
+    });
+  });
+
   group('shareJson', () {
     test('uses the share action, not save', () async {
       final shared = await shareJson(fileName: 'c.json', json: {'k': 2});

dep_freshness/_tables.py

@@ -64,6 +64,11 @@ MAVEN_REPOS: Final = (
     "https://repo1.maven.org/maven2/",
     "https://plugins.gradle.org/m2/",
 )
+# Asked only when none of the above knows an artifact AND the group is not
+# `com.github.*` (whose metadata is the 401 above): JitPack also hosts
+# artifacts under their own group, e.g. `cz.adaptech.tesseract4android`,
+# whose metadata answers 200 with the full release list.
+JITPACK_REPO: Final = "https://jitpack.io/"
 UTILS_TAG_REMOTE: Final = "https://github.com/kuhyx/utils"
 # JitPack coordinates: `com.github.<owner>:<repo>` or
 # `com.github.<owner>.<repo>:<module>`; the GitHub repo is what "HEAD" means.
@@ -86,6 +91,8 @@ NPM_ACCEPT: Final = "application/vnd.npm.install-v1+json"
 # --- Cache ------------------------------------------------------------------
 
 CACHE_PATH_ENV: Final = "DEP_FRESHNESS_CACHE"
+# Seconds; overrides every ecosystem TTL (a repo that wants a once-a-day gate).
+TTL_ENV: Final = "DEP_FRESHNESS_TTL_SECONDS"
 DEFAULT_CACHE_DIR: Final = "~/.cache/dep-freshness"
 CACHE_FILE: Final = "registry.json"
 TTL_SECONDS: Final = 6 * 3600
@@ -208,7 +215,7 @@ ALLOWLIST_MAX_DAYS: Final = 90
 TRANSITIVE_PREFIX: Final = "transitive:"
 # A fork's predicate: the entry holds only while the upstream repository's own
 # copy of the same manifest pins the same version, and dies the day upstream
-# bumps. TachiyomiSY cannot take moko-resources 0.27.0 (a 300-file accessor
-# rewrite that breaks every future upstream string) before jobobby04 does.
+# bumps. A fork that cannot take a release (e.g. a 300-file accessor rewrite
+# that breaks every future upstream string) before its upstream does.
 UPSTREAM_PREFIX: Final = "upstream:"
 GITHUB_RAW: Final = "https://raw.githubusercontent.com/{repo}/HEAD/{path}"

dep_freshness/cache.py

@@ -21,6 +21,7 @@ from dep_freshness._tables import (
     DEFAULT_CACHE_DIR,
     GITCOMMIT,
     GITTAG,
+    TTL_ENV,
     TTL_GITTAG_SECONDS,
     TTL_SECONDS,
 )
@@ -33,7 +34,14 @@ def cache_dir() -> Path:
 
 
 def ttl_for(ecosystem: str) -> int:
-    """Git refs move rarely and cost a subprocess, so they cache longer."""
+    """Git refs move rarely and cost a subprocess, so they cache longer.
+
+    `DEP_FRESHNESS_TTL_SECONDS` overrides both; garbage is ignored, because a
+    typo in an env var must not break a commit hook.
+    """
+    override = os.environ.get(TTL_ENV, "")
+    if override.isdigit() and int(override) > 0:
+        return int(override)
     return TTL_GITTAG_SECONDS if ecosystem in (GITTAG, GITCOMMIT) else TTL_SECONDS
 
 

dep_freshness/parsers/gradle.py

@@ -3,7 +3,7 @@
 The version catalog is the one place a Gradle build should declare versions,
 which makes it a manifest the gate can read without evaluating Kotlin DSL.
 A build may have several (`settings.gradle.kts` can `from(files(...))` any
-`*.versions.toml`; TachiyomiSY has three), so the suffix is what is matched.
+`*.versions.toml`; a large app can have several), so the suffix is what is matched.
 Three shapes appear in `[libraries]` and `[plugins]`:
 
     foo = "group:artifact:1.2.3"                         # inline string
@@ -12,7 +12,7 @@ Three shapes appear in `[libraries]` and `[plugins]`:
     plug = { id = "com.example.plugin", version.ref = "x" }
 
 A library with no version is managed by a BOM (`junit-platform-launcher`
-in TachiyomiSY) and is skipped: the BOM's own entry is the pin that counts.
+in a typical app) and is skipped: the BOM's own entry is the pin that counts.
 A rich version table (`{ strictly = "1.2" }`) is read as the constraint it
 spells and lands as unpinned when it is a range, like every other ecosystem.
 

dep_freshness/registries/gitcommit.py

@@ -1,6 +1,6 @@
 """JitPack artifacts pinned to a commit: "newest" is the default branch's HEAD.
 
-Seven of TachiyomiSY's dependencies are `com.github.<owner>:<repo>` at a
+Some Android builds depend on `com.github.<owner>:<repo>` at a
 short hash. No registry lists a "latest" for those, and a hash is not a
 version, so the gate's question becomes the only one a commit pin admits:
 is the pinned commit still what the source repository's default branch

dep_freshness/registries/maven.py

@@ -16,7 +16,9 @@ artifacts published nowhere else (PhotoView, DirectionalViewPager). Since
 themselves still download, so a `com.github.<owner>:<repo>` name that no
 repository knows is answered from the GitHub repo's tags over `git
 ls-remote` (unmetered, no token). JitPack's version IS the tag name, `v`
-prefix included, so the tags are compared as they are.
+prefix included, so the tags are compared as they are. Artifacts JitPack
+hosts under their OWN group (`cz.adaptech.tesseract4android`) still get
+200 metadata there, so JitPack is the last resort for any other name.
 
 `<latest>` and `<release>` in the metadata are not trusted: AndroidX writes
 `1.2.0-alpha03` into `<latest>` routinely. The full `<versions>` list goes
@@ -32,7 +34,12 @@ from __future__ import annotations
 
 from xml.etree import ElementTree
 
-from dep_freshness._tables import GITHUB_REMOTE, MAVEN_REPOS
+from dep_freshness._tables import (
+    GITHUB_REMOTE,
+    JITPACK_GROUP_PREFIX,
+    JITPACK_REPO,
+    MAVEN_REPOS,
+)
 from dep_freshness.registries._git import ls_remote
 from dep_freshness.registries.gitcommit import source_repo
 from dep_freshness.registries.http import get_text
@@ -69,6 +76,15 @@ def github_tags(name: str) -> list[str]:
     return [line.rpartition("refs/tags/")[2] for line in lines if "refs/tags/" in line]
 
 
+def _jitpack_versions(name: str) -> list[str]:
+    """What only JitPack knows: tags for `com.github.*`, metadata otherwise."""
+    if name.startswith(JITPACK_GROUP_PREFIX):
+        return github_tags(name)
+    url = metadata_url(JITPACK_REPO, name)
+    body = get_text(url) if url else None
+    return versions_in(body) if body is not None else []
+
+
 def latest(name: str) -> str | None:
     seen: list[str] = []
     for repo in MAVEN_REPOS:
@@ -79,5 +95,5 @@ def latest(name: str) -> str | None:
         if body is not None:
             seen.extend(versions_in(body))
     if not seen:
-        seen.extend(github_tags(name))
+        seen.extend(_jitpack_versions(name))
     return reference(seen) or newest_per_generation(seen)

dep_freshness/tests/test_gradle_registry.py

@@ -147,6 +147,47 @@ def test_a_tagless_repo_and_a_non_jitpack_name_are_none(repos, monkeypatch):
     assert calls == [("https://github.com/o/r", "--tags", "--refs")]
 
 
+JITPACK = maven.JITPACK_REPO
+TESSERACT = "cz.adaptech.tesseract4android:tesseract4android"
+
+
+def test_a_jitpack_only_artifact_is_answered_by_jitpack_metadata(repos):
+    """Tesseract4Android is published on JitPack under its own group, not
+    `com.github.*`, so there is no source repo to read tags from; JitPack's
+    metadata for it answers 200 and lists every release."""
+    repos[maven.metadata_url(JITPACK, TESSERACT)] = metadata(
+        "4.7.0", "4.9.0", "4.1.1a", latest="4.9.0"
+    )
+    assert maven.latest(TESSERACT) == "4.9.0"
+
+
+def test_jitpack_is_asked_last_and_only_when_nobody_else_knows_the_name(
+    repos, monkeypatch
+):
+    asked: list[str] = []
+    monkeypatch.setattr(
+        maven, "get_text", lambda url, *a, **k: asked.append(url) or repos.get(url)
+    )
+    repos[maven.metadata_url(CENTRAL, "io.coil-kt:coil")] = metadata("2.7.0")
+    assert maven.latest("io.coil-kt:coil") == "2.7.0"
+    assert not any(url.startswith(JITPACK) for url in asked)
+
+
+def test_a_github_jitpack_name_never_asks_jitpack_metadata(repos, monkeypatch):
+    """That endpoint answers 401 for `com.github.*`; the tags are the answer."""
+    asked: list[str] = []
+    monkeypatch.setattr(
+        maven, "get_text", lambda url, *a, **k: asked.append(url) or None
+    )
+    tags(monkeypatch, {"o/r": ["1.0.0"]})
+    assert maven.latest("com.github.o:r") == "1.0.0"
+    assert not any(url.startswith(JITPACK) for url in asked)
+
+
+def test_a_name_jitpack_does_not_know_either_is_none(repos):
+    assert maven.latest(TESSERACT) is None
+
+
 def test_an_unreachable_repo_is_offline(repos, monkeypatch):
     tags(monkeypatch, {})
     with pytest.raises(Offline):

dep_freshness/tests/test_resolve.py

@@ -12,6 +12,7 @@ from pathlib import Path
 
 import pytest
 
+from dep_freshness._tables import TTL_SECONDS
 from dep_freshness.cache import Cache, Entry, ttl_for
 from dep_freshness.models import Dep
 from dep_freshness.registries import http
@@ -139,3 +140,16 @@ def _offline(*_args):
 
 def _explode(*_args):
     raise RuntimeError("boom")
+
+
+def test_ttl_env_overrides_the_registry_ttl(monkeypatch) -> None:
+    """A repo can stretch the refresh window (once-a-day pre-push gates)."""
+    monkeypatch.setenv("DEP_FRESHNESS_TTL_SECONDS", "86400")
+    assert ttl_for("npm") == 86400
+    assert ttl_for("gittag") == 86400
+
+
+def test_ttl_env_garbage_falls_back_to_the_default(monkeypatch) -> None:
+    """A malformed value must never break a commit hook."""
+    monkeypatch.setenv("DEP_FRESHNESS_TTL_SECONDS", "soon")
+    assert ttl_for("npm") == TTL_SECONDS

dep_freshness/tests/test_versions.py

@@ -45,12 +45,19 @@ def test_newest_stable_ignores_unparseable_entries():
     # PyPI stub packages date-stamp a fourth component. Capping the regex at
     # three reported this exact pin as unpinned *against its own value*.
     ("==2.33.0.20260712", "2.33.0.20260712"),
+    # PEP 440 post/dev/pre releases are exact pins too (pytest-asyncio).
+    ("1.4.1.post1", "1.4.1.post1"), ("==1.4.1.post1", "1.4.1.post1"),
+    ("2.0.post3", "2.0.post3"), ("1.0.dev2", "1.0.dev2"),
+    ("==2.0rc1", "2.0rc1"), ("1.2.3a1", "1.2.3a1"), ("1.2b4", "1.2b4"),
+    ("1.0.post1.dev2", "1.0.post1.dev2"),
 ])
 def test_exact_pins_are_recognised(raw, expected):
     assert exact_pin(raw) == expected
 
 
-@pytest.mark.parametrize("raw", ["^1.6.0", ">=1.6.0", "any", "*", "", ">=1,<2", "~1.2"])
+@pytest.mark.parametrize("raw", ["^1.6.0", ">=1.6.0", "any", "*", "", ">=1,<2", "~1.2",
+    ">=1.4.1.post1", "~=1.4", "1.4.post", "1.4.postx", "1.4.1.post1,<2",
+])
 def test_ranges_are_not_exact_pins(raw):
     assert exact_pin(raw) is None
 
@@ -61,6 +68,13 @@ def test_behind_compares_versions():
     assert not behind("1.8.0", "1.7.0")
 
 
+def test_a_post_release_is_newer_than_its_base_release():
+    assert behind("1.4.1", "1.4.1.post1")
+    assert not behind("1.4.1.post1", "1.4.1")
+    assert not is_prerelease("1.4.1.post1")
+    assert newest_stable(["1.4.1", "1.4.1.post1", "1.4.0"]) == "1.4.1.post1"
+
+
 def test_behind_never_fires_on_unparseable_input():
     """An unpinned constraint is UNPINNED, never dressed up as staleness."""
     assert not behind("^1.6.0", "1.7.0")

dep_freshness/upstream.py

@@ -1,8 +1,8 @@
 """The `upstream:` predicate: does the fork's upstream still pin this version?
 
 A fork cannot always take a release before the project it tracks does --
-moko-resources 0.27.0 rewrites every string accessor across 300 files of
-TachiyomiSY and would break each future upstream commit that adds a string.
+a library that rewrites every string accessor across 300 files of the fork
+would break each future upstream commit that adds a string.
 "Wait for upstream" is the honest reason, and it is checkable: fetch the
 upstream repository's copy of the SAME manifest, parse it with the same
 parser, and compare the pin. Equal means the entry holds; different means

dep_freshness/versions.py

@@ -160,10 +160,12 @@ def behind(pinned: str, latest: str) -> bool:
 # date-stamp a fourth (`types-requests==2.33.0.20260712`), and capping at
 # three reported an exact pin as unpinned against itself. A project-name
 # prefix (`natural-comparator-1.1`) is part of the pin, since it is what the
-# registry's version list spells.
+# registry's version list spells. PEP 440 `(a|b|rc)N`, `.postN` and `.devN`
+# follow the release (`pytest-asyncio==1.4.1.post1`), before the semver suffix.
 EXACT = re.compile(
     r"^\s*(?:==\s*)?(?:[A-Za-z][A-Za-z_.-]*?-(?=v?\d))?"
-    r"v?\d+(?:\.\d+)*(?:[-+][0-9A-Za-z.-]+)?\s*$"
+    r"v?\d+(?:\.\d+)*(?:(?:a|b|rc)\d+)?(?:\.post\d+)?(?:\.dev\d+)?"
+    r"(?:[-+][0-9A-Za-z.-]+)?\s*$"
 )
 
 

design_system/lib/src/fit_grid.dart

@@ -8,9 +8,10 @@ import 'package:flutter/material.dart';
 ///
 /// Rows per page come from the height the parent gives it; the overflow moves
 /// to further pages in a horizontal [PageView], marked by dots once there is
-/// more than one. [itemBuilder] gets the global item index and must fill the
-/// cell it is given: a square of up to column width plus [labelHeight], the
-/// rows stretching to use up the leftover height.
+/// more than one (a "n / N" counter past 12 pages). [itemBuilder] gets the
+/// global item index and must fill the cell it is given: a square of up to
+/// column width plus [labelHeight], the rows stretching to use up the
+/// leftover height.
 class FitGrid extends StatefulWidget {
   /// Creates the grid.
   const FitGrid({
@@ -54,6 +55,10 @@ class FitGrid extends StatefulWidget {
 const double _dotSize = AppSpacing.sm;
 const double _dotsHeight = AppSpacing.md + AppSpacing.xs;
 
+// Above this many pages a row of dots outgrows a phone width, so the
+// indicator becomes a "n / N" counter instead.
+const int _maxDots = 12;
+
 class _FitGridState extends State<FitGrid> {
   final _controller = PageController();
   var _page = 0;
@@ -159,22 +164,35 @@ class _Dots extends StatelessWidget {
     return ExcludeSemantics(
       child: SizedBox(
         height: _dotsHeight,
-        child: Row(
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: [
-            for (var i = 0; i < count; i++)
-              Container(
-                key: ValueKey<String>('fit-grid-dot-$i'),
-                width: _dotSize,
-                height: _dotSize,
-                margin: const EdgeInsets.symmetric(horizontal: AppSpacing.xs),
-                decoration: BoxDecoration(
-                  shape: BoxShape.circle,
-                  color: i == current ? scheme.primary : scheme.outlineVariant,
+        child: count > _maxDots
+            ? Center(
+                child: Text(
+                  '${current + 1} / $count',
+                  key: const ValueKey<String>('fit-grid-page-counter'),
+                  style: Theme.of(context).textTheme.labelSmall,
+                  textScaler: TextScaler.noScaling,
                 ),
+              )
+            : Row(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  for (var i = 0; i < count; i++)
+                    Container(
+                      key: ValueKey<String>('fit-grid-dot-$i'),
+                      width: _dotSize,
+                      height: _dotSize,
+                      margin: const EdgeInsets.symmetric(
+                        horizontal: AppSpacing.xs,
+                      ),
+                      decoration: BoxDecoration(
+                        shape: BoxShape.circle,
+                        color: i == current
+                            ? scheme.primary
+                            : scheme.outlineVariant,
+                      ),
+                    ),
+                ],
               ),
-          ],
-        ),
       ),
     );
   }

design_system/pubspec.yaml

@@ -5,7 +5,7 @@ description: >-
   helpers that were each reimplemented in three or more repos. Owns the tokens
   -- consumers import them rather than transcribing the token table by hand.
 publish_to: 'none'
-version: 0.3.0
+version: 0.3.1
 
 environment:
   sdk: ^3.12.2

design_system/test/fit_grid_test.dart

@@ -126,6 +126,30 @@ void main() {
     expect(find.text('item $perPage').hitTestable(), findsNothing);
   });
 
+  testWidgets('more than 12 pages: "n / N" counter instead of dots', (
+    tester,
+  ) async {
+    await _pump(tester, count: 30);
+    final perPage = _onScreen(tester);
+    final count = perPage * 13;
+    await _pump(tester, count: count);
+    expect(_dot, findsNothing);
+    final counter = find.byKey(const ValueKey('fit-grid-page-counter'));
+    expect(tester.widget<Text>(counter).data, '1 / 13');
+    await tester.fling(find.byType(PageView), const Offset(-250, 0), 1000);
+    await tester.pumpAndSettle();
+    expect(tester.widget<Text>(counter).data, '2 / 13');
+    expect(tester.takeException(), isNull);
+  });
+
+  testWidgets('exactly 12 pages still shows dots', (tester) async {
+    await _pump(tester, count: 30);
+    final perPage = _onScreen(tester);
+    await _pump(tester, count: perPage * 12);
+    expect(_dot, findsNWidgets(12));
+    expect(tester.takeException(), isNull);
+  });
+
   testWidgets('swiping left shows the next page and moves the dot', (
     tester,
   ) async {

dopamine-ux/DOCS-dopamine-ux-index.md

@@ -1,165 +0,0 @@
-# Dopamine UX — session prompts
-
-Ten pasteable prompts derived from *"The Dopamine Architecture: How UX Designers
-Hold User Attention in 2026"* (london-post.co.uk), applied to kuhy's repos.
-
-Paste **one file's contents** into a fresh Claude session. Each is
-self-contained: it restates the findings it depends on, so no session needs the
-context of another.
-
-## The two tests — every change must pass both
-
-The article's four mechanics (variable rewards, micro-animations, sound design,
-near-miss) are in scope, aimed at **kuhy's own stated goals**. They are gated by
-two questions, not by an allow/deny list:
-
-1. **Is the displayed state true?** A progress ring at 93% is legitimate *iff*
-   you are actually at 93%. A streak is legitimate iff it counts real days.
-   Dopamine may come from framing, timing and salience — **never from a
-   fabricated number**.
-2. **Is the variance real?** A random pick from a real pool (next workout, next
-   task) is legitimate. Injected random bonus points to manufacture uncertainty
-   are not.
-
-### The load-bearing corollary
-
-**Reward the recording, never the number recorded.** In diet-guard the
-satisfying moment fires on *logging a meal*, not on hitting a calorie target —
-otherwise the app rewards eating less rather than recording honestly, and
-corrupts its own data. Same shape in workout_app (reward logging a workout, not
-beating a PB) and todo (reward capture, not completion count).
-
-## Running order
-
-`01` gates everything. `07` gates `08`. Everything else is independent.
-
-| # | File | Repo | Findings |
-|---|---|---|---|
-| 01 | `01-motion-tokens.md` | `~/src/utils` | 3 |
-| 02 | `02-structural-check.md` | `~/src/utils` | 2 |
-| 03 | `03-diet-guard.md` | `~/src/diet-guard` | 4 |
-| 04 | `04-screen-locker.md` | `~/src/screen-locker` | 3 |
-| 05 | `05-workout-app.md` | `~/src/screen-locker/stronglift_replacement/workout_app` | 4 |
-| 06 | `06-todo.md` | `~/src/todo` | 3 |
-| 07 | `07-dufs-theme.md` | `~/src/dufs-cloud` | 2 |
-| 08 | `08-dufs-motion.md` | `~/src/dufs-cloud` | 4 |
-| 09 | `09-wake-alarm.md` | `~/src/wake-alarm` | 2 |
-
-**27 ranked findings total.**
-
-### Dependency graph
-
-```
-01-motion-tokens ──┬─→ 03, 04, 05, 09   (transcribe tokens locally)
-                   ├─→ 06               (bump design_system-v0.2.0)
-                   └─→ 07 ─→ 08         (bump web_ui-v0.3.2)
-02-structural-check  (independent; run after 01 so it has motion tokens to check)
-```
-
-## The top three findings fleet-wide
-
-Ranked by value-over-effort from the survey data:
-
-1. **screen-locker streak render** (prompt 04) — `snapshot.streak` is already
-   populated and no renderer reads it. Zero new state, zero conftest change,
-   zero new dependency.
-2. **diet-guard `_onLogMeal` feedback** (prompt 03) — the flagship case.
-   Dependency-free via `HapticFeedback` from `flutter/services.dart`.
-3. **workout_app finish-workout cue** (prompt 05) — `audioplayers`, `vibration`,
-   the `assets:` block and the VIBRATE permission are **already present**. Only
-   the call is missing.
-
-## Distributed copies, and the completion protocol
-
-Each prompt is **also copied into the repo it acts on**, at
-`<repo>/prompts/dopamine-ux-*.md`, so you can open a repo and say
-"do dopamine-ux-<name>" without going hunting. **This directory stays the source
-of truth** — if a prompt needs correcting, fix it here and re-distribute.
-
-| Prompt | Distributed to |
-|---|---|
-| 01 | `~/src/utils/prompts/dopamine-ux-01-motion-tokens.md` — deleted (done) |
-| 02 | `~/src/utils/prompts/dopamine-ux-02-structural-check.md` |
-| 03 | `~/src/diet-guard/prompts/dopamine-ux-diet-guard.md` |
-| 04 | `~/src/screen-locker/prompts/dopamine-ux-04-screen-locker.md` |
-| 05 | `~/src/screen-locker/prompts/dopamine-ux-05-workout-app.md` |
-| 06 | `~/src/todo/prompts/dopamine-ux-todo.md` |
-| 07 | `~/src/dufs-cloud/prompts/dopamine-ux-07-theme.md` |
-| 08 | `~/src/dufs-cloud/prompts/dopamine-ux-08-motion.md` |
-| 09 | `~/src/wake-alarm/prompts/dopamine-ux-wake-alarm.md` |
-
-When a session finishes a prompt it **deletes its repo copy** (in the same
-commit as the implementation) and **appends a row below**. A finished prompt left
-in a repo is indistinguishable from a pending one, and the next session re-runs
-it. Partial completion is never recorded as DONE — the file is edited to state
-what remains instead.
-
-### Completion log
-
-| Prompt | Status | Impl commit | Note |
-|---|---|---|---|
-| 01-motion-tokens.md | DONE 2026-08-22 | `f741896` | `motion.md` frozen; `AppDuration`/`AppCurve` + `--duration-*`/`--ease-*` shipped. Tags: `design_system-v0.2.0`, `web_ui-v0.3.2`. |
-| 02-structural-check.md | not started | — | — |
-| 03-diet-guard.md | not started | — | — |
-| 04-screen-locker.md | not started | — | — |
-| 05-workout-app.md | not started | — | — |
-| 06-todo.md | not started | — | — |
-| 07-dufs-theme.md | not started | — | — |
-| 08-dufs-motion.md | not started | — | — |
-| 09-wake-alarm.md | not started | — | — |
-
-## Keeping these prompts honest
-
-Every path and symbol cited across these files is machine-checked:
-
-```
-python3 ~/src/utils/dopamine-ux/verify_prompts.py
-```
-
-Exit 0 means every cited path resolves and every cited symbol is still greppable
-in the file it is attributed to. **Re-run it after any refactor of the surveyed
-repos** — a prompt pointing at a renamed function is worse than no prompt, and a
-path check alone cannot catch that (which is why it greps symbols too).
-
-Verified 2026-08-16: 146 paths, 30 symbols, all passing.
-
-## Rules that apply to every prompt
-
-1. **Tag cuts and version bumps are explicit steps.** `todo` consumes
-   `design_system` at git ref `design_system-v0.1.0`; `dufs-cloud/web` consumes
-   `@kuhyx/web-ui` at `web_ui-v0.3.1`. Adding tokens to those packages does
-   nothing for consumers until a new tag is cut. Prompt 01 ends by cutting
-   `design_system-v0.2.0` and `web_ui-v0.3.2`; prompts 06 and 08 begin by
-   bumping to those literal refs.
-2. **Anchor on symbols, not line numbers.** Line numbers in these prompts are
-   "as of 2026-08-16" and will drift. The symbol name is the real anchor —
-   grep for it rather than trusting the line.
-3. **Reduce-motion is mandatory and is NOT the sound toggle.** Web:
-   `@media (prefers-reduced-motion: reduce)`. Flutter:
-   `MediaQuery.of(context).disableAnimations`. The OS motion preference is
-   honoured automatically; the sound opt-out is a separate user-facing toggle.
-4. **Motion and haptics first, sound second.** Haptics need no dependency;
-   sound needs a pubspec dep, an `assets:` block, and a settings toggle. Each
-   prompt stages them separately so a short session still lands the valuable
-   half, and sound stays independently revertable.
-5. **Sound ships on (opt-out), never in screen-locker enforcement paths.**
-6. **250-line cap** applies to code and prose alike (`~/src/utils/file_length`).
-
-## Source
-
-Article findings, verbatim from the piece:
-
-- **Variable reward schedules** — unpredictable outcomes produce stronger
-  dopaminergic activity than guaranteed ones. Duolingo streaks, feed ordering,
-  pull-to-refresh.
-- **Micro-animations** — "a button that bounces on press, a like counter that
-  ticks upward with a slight delay". Replaces latency with feedback, so waiting
-  reads as responsiveness rather than frustration.
-- **Sound design** — "operates below the threshold of conscious attention";
-  the article's judgement is that it is more powerful than visual design and
-  gets less critical attention.
-- **Near-miss effects** — a fitness ring at ninety-three per cent creates
-  discomfort that drives re-engagement, and works *even when the user is
-  explicitly told the mechanism*.
-- Core claim: **dopamine is released in anticipation of a reward, not on
-  receipt. The uncertainty is the trigger.**

dopamine-ux/TODO-01-motion-tokens.md

@@ -1,140 +0,0 @@
-Add motion, haptic and sound tokens to the unified design system
-
-## findings (3, ranked by value over effort)
-
-1. **No motion token exists in any stack** — greenfield. Every app that wants an
-   animation currently invents its own number, and one already has.
-2. **No haptic vocabulary exists** — the highest-value gap, because
-   `HapticFeedback` needs no dependency, so three of four apps can adopt it
-   the day this lands.
-3. **`tokens.md` is 260 lines against a 250 cap** — it cannot absorb a new
-   section, so motion needs a sibling file.
-
-## what
-
-The shared design system has colour, spacing, radius, type and shadow tokens —
-and **no motion tokens at all**. Verified 2026-08-16: no `Duration`, `Curve`,
-`--duration-*`, `--ease-*`, or haptic constant exists in any stack copy. There is
-not even a prose position that motion is out of scope.
-
-Consequence across kuhy's Flutter fleet: **exactly one animation exists in four
-apps** — a lone `AnimatedContainer(duration: Duration(milliseconds: 200))` with an
-inline magic number. Every other transition is a Flutter/browser default.
-
-Create the motion token layer so the per-app prompts (03–09) have something
-canonical to consume instead of each inventing durations.
-
-## where
-
-Repo: `~/src/utils` (git repo, has CI + the file-length gate wired).
-
-**Create** `~/src/utils/unified-design-system/motion.md` — the prose freeze.
-
-**Do NOT append to `~/src/utils/unified-design-system/tokens.md`.** It is 260 lines
-and the cap is 250, so it already fails the gate; adding to it makes that worse.
-`screen-size.md` was split out of it for exactly this reason — follow that
-precedent and add a pointer line in `tokens.md` only if you can do so without
-growing it (i.e. by shortening another line).
-
-Then mirror the tokens into the three code stacks:
-
-| Stack | File | Form |
-|---|---|---|
-| Flutter/Dart | `~/src/utils/design_system/lib/src/tokens.dart` | `class AppDuration` / `class AppCurve` |
-| web/React | `~/src/utils/web_ui/src/tokens.css` | `--duration-*`, `--ease-*` custom props |
-| Python/Tkinter | `~/src/utils/gatelock/gatelock/_window.py` (`class LockConfig`) | int ms fields — **only if meaningful**; see `must not` |
-
-There are **three** code stacks plus the prose freeze. Do not go hunting for a
-fourth — it does not exist.
-
-## must
-
-- Define a **small** scale. Recommended, but use judgement:
-  `instant 0ms · fast 120ms · base 200ms · slow 320ms`, and easing
-  `standard (0.2, 0, 0, 1)` · `decelerate (0, 0, 0, 1)` · `accelerate (0.3, 0, 1, 1)`.
-  Justify each value in `motion.md` in one line — the file is a freeze, so the
-  reasoning has to survive without you.
-- Include a **haptic** vocabulary mapped to Flutter's `HapticFeedback` API:
-  which semantic event gets `selectionClick` vs `lightImpact` vs `mediumImpact`.
-  This is the highest-value part — `HapticFeedback` needs no dependency, so
-  three of four apps can adopt it immediately.
-- Include a **sound** vocabulary: named semantic cues (`confirm`, `complete`,
-  `error`) with the rule that sound ships **on** (opt-out) per app, and that
-  each app owns its own asset files.
-- State the reduced-motion contract in `motion.md`: web uses
-  `@media (prefers-reduced-motion: reduce)`, Flutter uses
-  `MediaQuery.of(context).disableAnimations`. Motion tokens collapse to `0ms`
-  under it; **haptics and sound are unaffected** (they are not motion).
-- Keep every file at or under **250 lines** (`~/src/utils/file_length/config.py`,
-  `MAX_LINES = 250`). `.md` and `.py` are capped; `.css` is not.
-- **Cut tags at the end** — this is the step that makes the work reach consumers:
-  - `design_system-v0.2.0` (consumed by `~/src/todo`, currently on `v0.1.0`)
-  - `web_ui-v0.3.2` (consumed by `~/src/dufs-cloud/web`, currently on `v0.3.1`)
-  Print both tag names at the end of the session; prompts 06, 07 and 08 need them.
-
-- must not: add motion values to the Tkinter `LockConfig` just for symmetry.
-  Tkinter has no animation framework. If a duration has no meaning there, mark
-  the row `n/a (tk)` in `motion.md` and leave the Python alone. An honest `n/a`
-  beats a dead constant.
-- must not: express any motion token as a hex-looking value. The existing
-  `palette_check.py` parses `#RRGGBB` and would either ignore it or trip on it.
-- must not: touch any colour token, or add a colour alongside the motion work.
-  That *would* break `palette_check.py`'s completeness half.
-- must not: add `# noqa` or `type: ignore` anywhere.
-
-- optional: a `prefers-reduced-motion` helper in
-  `~/src/utils/design_system/lib/src/` and/or `web_ui/src/` so consumers get the
-  collapse behaviour without reimplementing it. Nice, not required.
-
-## done
-
-All four hold:
-
-1. `~/src/utils/unified-design-system/motion.md` exists, is ≤250 lines, and defines
-   duration, easing, haptic and sound vocabularies with a one-line rationale each.
-2. `python3 ~/src/utils/file_length/check.py` (or
-   `~/src/utils/scripts/check_file_length.sh --all`) reports **no new** violations.
-   `tokens.md` (260), `nielsen-audit.md` (258) and `README.md` (257) are
-   pre-existing failures — do not fix them here, but do not add a fourth.
-3. `python3 ~/src/utils/unified-design-system/scripts/palette_check.py` still exits 0.
-4. Both tags exist: `git -C ~/src/utils tag | grep -E 'design_system-v0.2.0|web_ui-v0.3.2'`
-   prints two lines.
-
-## verify
-
-Desktop, any way you like — this prompt ships no UI. Run the two gate commands in
-`done` and paste their output. Then confirm the token names you chose are what
-prompts 03–09 will reference by printing the Dart class and the CSS custom-prop
-block.
-
-## read first
-
-- `~/src/utils/unified-design-system/tokens.md` — the existing freeze; match its
-  table format and tone exactly. Note its length problem before editing.
-- `~/src/utils/unified-design-system/screen-size.md` — the precedent for a sibling
-  file split out of `tokens.md` (32 lines; short and self-contained).
-- `~/src/utils/design_system/lib/src/tokens.dart` — `AppPalette`, `AppSpacing`,
-  `AppRadius`, `AppTextSize`. Your `AppDuration`/`AppCurve` sit alongside these.
-- `~/src/utils/web_ui/src/tokens.css` — the full custom-prop list.
-- `~/src/utils/design_system/lib/src/feedback.dart` — `showToast`/`showError` and
-  `_show`. `confirm.dart` next to it **already imports
-  `package:flutter/services.dart`**, so `HapticFeedback` is one call away with no
-  new import. This is the natural home for a shared haptic helper.
-- `~/src/utils/unified-design-system/scripts/palette_check.py` — read the four
-  `parse_*` regexes to see why motion tokens are invisible to it. Prompt 02
-  builds the checker that covers them; **do not extend this script here.**
-
-## context you would otherwise rediscover
-
-- **Green CI does not mean no drift for these tokens.** `palette_check.py` only
-  matches `#RRGGBB`, so a `--duration-fast: 120ms` is invisible to every one of
-  its parsers. `palette_map.py:159` claims structural values are "checked by the
-  scale check" — **no such script exists**. Prompt 02 writes it.
-- `~/src/utils/gatelock/` is a package inside the `~/src/utils` monorepo, not a
-  standalone repo. It is consumed as a pinned git dependency.
-- Only `~/src/todo` depends on `design_system`; diet-guard, workout_app and
-  wake_alarm hand-transcribe the token values into local `lib/ui/theme.dart`
-  copies. So tokens added here reach exactly one app automatically — the others
-  are handled per-prompt.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-02-structural-check.md

@@ -1,139 +0,0 @@
-Add a structural-token drift checker to CI
-
-## findings (2, ranked by value over effort)
-
-1. **Spacing, radius and type have never been drift-checked** — `palette_check.py`
-   parses hex only, so three whole token categories can diverge across stacks
-   while CI stays green. Motion inherits the same hole.
-2. **`palette_map.py` points at a "scale check" that does not exist** — a
-   comment describing a guarantee nobody wrote.
-
-## what
-
-`palette_check.py` guarantees the colour palette agrees across all stack copies.
-It does **not** check anything else — verified 2026-08-16 by reading its four
-parsers, every one of which requires a `#RRGGBB` value:
-
-```python
-parse_css : r"(--[a-z0-9-]+)\s*:\s*(#[0-9A-Fa-f]{6})\s*;"
-parse_dart: r"static const Color (\w+) = Color\(0x[fF]{2}([0-9A-Fa-f]{6})\)"
-parse_tk  : r'^\s{4}(\w+):\s*str\s*=\s*"(#[0-9A-Fa-f]{6})"'
-parse_md  : r"^\|\s*`([a-z0-9-]+)`\s*\|\s*`(#[0-9A-Fa-f]{6})`"
-```
-
-So **spacing, radius and type have been silently unprotected all along**, and the
-motion tokens added by prompt 01 inherit the same hole. A `--duration-fast: 120ms`
-is invisible to every parser: CI passes while the stacks drift apart.
-
-Worse, `scripts/palette_map.py:159` claims structural values are "checked by the
-scale check" — **no such script exists anywhere in `~/src/utils`**. That comment
-describes a check that was never written. This prompt writes it.
-
-## where
-
-Repo: `~/src/utils`.
-
-**Create** `~/src/utils/unified-design-system/scripts/structural_check.py`.
-
-**Edit** `~/src/utils/.github/workflows/palette-drift.yml` — add a step invoking it.
-The workflow deliberately has no `paths:` filter; keep it that way.
-
-**Fix** the stale comment at `~/src/utils/unified-design-system/scripts/palette_map.py`
-(~:159) to name the real script.
-
-Sources to compare (three code stacks + the prose freeze):
-
-| Role | Path |
-|---|---|
-| prose freeze | `~/src/utils/unified-design-system/tokens.md` (spacing/radius/type) |
-| motion freeze | `~/src/utils/unified-design-system/motion.md` (**created by prompt 01** — run it first) |
-| web/React | `~/src/utils/web_ui/src/tokens.css` |
-| Flutter/Dart | `~/src/utils/design_system/lib/src/tokens.dart` |
-| Python/Tkinter | `~/src/utils/gatelock/gatelock/_window.py` (`class LockConfig`) |
-
-## must
-
-- Cover **motion** (durations, easing) **and** the already-unprotected
-  **spacing, radius and type** scales, in one checker.
-- Mirror `palette_check.py`'s two-halves design, because it is the part that
-  actually works:
-  1. **Agreement** — for each mapped token, resolve it in every non-`n/a` stack
-     and fail if values disagree.
-  2. **Completeness, bidirectional** — every structural value parsed out of any
-     source must be mapped, or explicitly exempted. This is what catches
-     "added it to one stack, forgot the others".
-- Support an explicit **`n/a` per stack**, and require a reason string. Tkinter
-  has no animation framework; a duration legitimately does not exist there. An
-  honest `n/a` with a reason is correct — a fabricated constant is not.
-- **Adjudicate with exit codes.** Exit non-zero on drift with a message naming
-  the token and the disagreeing files. No warnings-only mode.
-- Keep every file ≤ **250 lines** (`~/src/utils/file_length/config.py`). Note
-  `palette_check.py` is 231 and `palette_map.py` is 162 — that pair was split
-  precisely to stay under the cap. **Split yours the same way from the start**
-  (`structural_check.py` + `structural_map.py`) rather than discovering the
-  problem at 251 lines.
-- Ruff-clean under the repo's config. No `# noqa`, no `type: ignore`.
-
-- **Expect it to fail on first run.** Spacing/radius/type have never been
-  compared; there may be real pre-existing drift. That is the point of writing
-  it. Fix whatever it surfaces, in the stack copy that is wrong, and say in the
-  session summary what drifted.
-- must not: weaken the checker, add an exemption, or narrow its scope to make it
-  green. If a token genuinely differs per stack for a good reason, encode it as
-  an `n/a`/variant **with the reason recorded**, not as a silent skip.
-- must not: modify `palette_check.py`. It works; it is simply colour-only. The
-  two scripts run side by side.
-- must not: change any token *value* to resolve a disagreement without saying so
-  explicitly — that is a design change, and `tokens.md` is a freeze. Surface it
-  and let kuhy decide which value is canonical.
-
-- optional: teach it the shadow tier too, if that falls out cheaply.
-
-## done
-
-1. `python3 ~/src/utils/unified-design-system/scripts/structural_check.py` exits 0,
-   and exits non-zero when you deliberately break one stack copy (**test both
-   directions** — a checker that never fails is not a checker).
-2. It is wired into `~/src/utils/.github/workflows/palette-drift.yml` and the
-   workflow passes.
-3. `palette_map.py`'s "scale check" comment names the real script.
-4. `~/src/utils/scripts/check_file_length.sh --all` reports no new violations.
-5. The session summary states what drift, if any, the first run found.
-
-## verify
-
-Desktop. Run the script, paste the output. Then prove it fails: change one
-spacing or duration value in **one** stack copy, re-run, paste the non-zero exit
-and the message, and revert. Both halves of that demonstration are required —
-the passing run alone proves nothing.
-
-## read first
-
-- `~/src/utils/unified-design-system/scripts/palette_check.py` — the design to
-  mirror. Read `NON_COLOUR_CSS`: it is the regex that currently *excludes*
-  spacing/radius/type/shadow from the colour check, and therefore the precise
-  list of what you are now covering.
-- `~/src/utils/unified-design-system/scripts/palette_map.py` — the `PALETTE` tuple of
-  `Token(canonical, md, css, dart, tk, why)` rows. Your map wants the same shape,
-  including the `why` field.
-- `~/src/utils/.github/workflows/palette-drift.yml` — how `palette_check.py` and
-  `ramp_check.py` are invoked; add your step alongside.
-- `~/src/utils/unified-design-system/motion.md` — what prompt 01 created.
-- `~/src/utils/unified-design-system/tokens.md` — the spacing/radius/type tables.
-  **Do not edit it**; it is 260 lines and already over the cap.
-
-## context you would otherwise rediscover
-
-- The four "stack copies" are really **three code stacks plus a prose freeze**.
-  There is no fourth code stack; do not hunt for one.
-- `~/src/dufs-cloud/app/lib/ui/theme.dart` is a **fifth, uncompared copy** of the
-  palette (the Flutter app has no `design_system` dependency and hand-restates
-  every hex). It is out of scope here — prompt 07 wires it up properly. Do not
-  add it as a source to this checker; wait until 07 has removed it.
-- Three Flutter apps (diet-guard, workout_app, wake_alarm) similarly
-  hand-transcribe tokens into local `lib/ui/theme.dart` files. Those are
-  deliberately outside the checker's scope for now — bringing them in is a much
-  larger job than this prompt.
-- `~/src/utils/gatelock/` is a package inside this monorepo, not a separate repo.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-03-diet-guard.md

@@ -1,170 +0,0 @@
-Make logging a meal feel satisfying in diet_guard_app
-
-## findings (4, ranked by value over effort)
-
-1. **`_onLogMeal()` gives zero feedback** — no haptic, no sound, no animation, no
-   confirmation. The flagship gap. Fix needs no new dependency.
-2. **Streak text is inert** — "Adherence streak: N days" is a plain `Text` that
-   blinks to a new value. Real data, no salience.
-3. **No VIBRATE permission** — blocks haptics until added to the manifest.
-4. **No audio capability at all** — no package, no `assets:` block. Step 2 only.
-
-## what
-
-Logging a meal currently produces **no feedback whatsoever**. `_onLogMeal()` in
-`lib/screens/log_meal_screen.dart` writes the meal, syncs it, clears the fields,
-and calls `setState(() { _progress = buildTodayProgress(log); })`. The progress
-card silently appears. No SnackBar, no haptic, no sound, no animation.
-
-That is the whole problem. In kuhy's words: *"noting what you ate should be
-SATISFYING and ADDICTING so you WANT TO ACTUALLY note down what you ate."* The
-data quality of the entire app depends on the logging habit surviving the days
-you don't feel like it, and right now the act of logging gives nothing back.
-
-Make the moment of logging land: an immediate haptic, a real confirmation, and
-the streak/progress reacting visibly rather than blinking into existence.
-
-## where
-
-Repo: `~/src/diet-guard`. Flutter app: `~/src/diet-guard/app` (package `diet_guard_app`).
-
-Primary:
-- `app/lib/screens/log_meal_screen.dart` — `_onLogMeal()` (line 122-168 as of
-  2026-08-16; **grep the symbol, the line will drift**). The `setState` that
-  silently swaps in the progress card is at ~:164-166. Card rendered at ~:240.
-- `app/lib/widgets/today_progress_card.dart` — `TodayProgress` model (~:15),
-  `TodayProgressCard` (~:64). Consumed/budget kcal ~:100, P/C/F macro row ~:122,
-  **"Adherence streak: N days"** ~:129-130 — all plain `Text`, no ring, no bar.
-- `app/lib/widgets/streak_summary_row.dart` — `StreakSummaryRow`: logging streak,
-  adherence streak, YTD tally. Also text-only.
-- `app/lib/screens/log_meal_progress.dart` — `buildTodayProgress(DayLog)` (~:18),
-  `adherenceStreak(...)` (~:31).
-
-Theme (local hand-copy, **no `design_system` dependency**):
-- `app/lib/ui/theme.dart` — `buildAppTheme()` ~:12, `AppStatusColors`
-  ThemeExtension ~:89, redeclared `AppSpacing` ~:124, `AppRadius` ~:146,
-  `AppTextSize`, plus an `AppWidth` class the shared package does not have.
-
-Settings (for the sound opt-out in step 2):
-- `app/lib/screens/settings_screen.dart` — body is a `ListView` inside
-  `Center > ConstrainedBox(maxWidth: AppWidth.prose)` at ~:161-165.
-  **No `SwitchListTile` exists anywhere in this app** — you are adding the first.
-- `app/lib/services/app_settings_service.dart` — the store. **Not
-  SharedPreferences**: a singleton over a `DocumentStore` writing JSON to
-  `app_settings.json` (~:26). `init()` ~:49, `_load()` ~:95-112, setters funnel
-  through `_persist`/`_writeToDisk` ~:147-165 (read the comment at ~:153-155 —
-  `_writeToDisk` is the single write path every setter must use).
-  `resetForTesting`/`initForTesting` at ~:66/:74.
-
-## must
-
-**Step 1 — motion + haptics (no new dependency; land this first).**
-
-- On successful meal log, fire `HapticFeedback.mediumImpact()` (or the token
-  vocabulary's "complete" cue if prompt 01 defined one). `HapticFeedback` comes
-  from `package:flutter/services.dart` — **no pubspec change needed**. Add
-  `<uses-permission android:name="android.permission.VIBRATE"/>` to
-  `app/android/app/src/main/AndroidManifest.xml`; it is currently absent.
-- Fire it **immediately on the tap**, before the write/sync completes. The
-  article's point about micro-animations is that they replace latency with
-  feedback; a haptic that waits for a network round-trip defeats it.
-- Animate the progress card's arrival and the numbers' change rather than
-  snapping: the kcal figure and the streak count should visibly move to their new
-  value. Use the motion tokens from prompt 01.
-- Show an explicit confirmation of what was recorded — the user should not have
-  to infer success from a card appearing.
-- Honour `MediaQuery.of(context).disableAnimations`: collapse durations to zero.
-  Haptics still fire (they are not motion).
-
-**Step 2 — sound (separate, independently revertable).**
-
-- Add an audio dependency and an `assets:` block to `app/pubspec.yaml` (neither
-  exists today), plus a short confirmation cue asset.
-- Sound ships **on**, with an opt-out `SwitchListTile` in `settings_screen.dart`,
-  backed by a new bool in `app_settings_service.dart` following the existing
-  field pattern: private field + static getter, parsed in `_load()`, written via
-  `_writeToDisk`.
-- The toggle controls **UI sound only**. Never route notification-channel
-  behaviour through it.
-
-**Both steps:**
-
-- must not: **reward the calorie number.** The satisfying moment fires on
-  *logging*, not on being under budget. Rewarding a low number teaches the user
-  to eat less rather than record honestly, and corrupts the app's own data. A
-  meal that blows the budget gets the same confirmation as one that doesn't.
-- must not: fabricate or round up any displayed value. The streak counts real
-  consecutive days; the progress bar reflects the true ratio. Framing, timing
-  and salience are fair game — the numbers are not.
-- must not: add a celebratory cue to *deleting* or editing a meal. Only the
-  record-creating act gets it.
-- must not: touch `~/src/diet-guard/diet_guard/` (the Python desktop side) — it has
-  its own streak logic and is out of scope here.
-- optional: a progress ring instead of the plain kcal text. The article's
-  near-miss point applies honestly here — a ring at 80% of budget is truthful
-  and more motivating than a number. Only if it stays accurate.
-
-## done
-
-1. Logging a meal on the phone produces a haptic within ~50ms of the tap, an
-   explicit confirmation, and a visible (not instant) update of the streak/progress.
-2. `cd ~/src/diet-guard/app && flutter analyze` is clean.
-3. `cd ~/src/diet-guard/app && flutter test` passes.
-4. With OS "remove animations" enabled, the screen still works and durations are
-   zero — verified by toggling it, not by reading the code.
-5. Step 2 only: the settings toggle flips, persists across an app restart, and
-   silences the cue.
-
-## verify
-
-**On the phone — this app is mobile-primary; desktop is not sufficient.**
-
-```
-adb devices                      # confirm 23181JEGR08034 is attached
-cd ~/src/diet-guard/app
-flutter build apk --release
-adb install -r build/app/outputs/flutter-apk/app-release.apk
-```
-
-Never `flutter install`, never `adb uninstall`, never `pm clear` — those wipe
-real logged food data. `adb install -r` preserves it.
-
-Then log a real meal on the device and report what you felt and saw. A haptic is
-a physical outcome: state what the phone did, do not claim it worked from code.
-If `com.kuhy.*` focus-mode kills the app on launch, the app needs a focus
-whitelist entry before it can be tested.
-
-## read first
-
-- `app/lib/screens/log_meal_screen.dart` — `_onLogMeal()`. Read the whole method
-  before editing; the sync call and the field-clearing both matter for where the
-  haptic goes.
-- `app/lib/services/app_settings_service.dart` — the `dailyKcalGoal` field
-  (~:34/:40) is the pattern to copy for a new bool. Note the `_writeToDisk`
-  comment.
-- `~/src/diet-guard/diet_guard/_calendar_view.py` — `streaks_text()` ~:136 and
-  `ytd_text()` ~:154. The Dart `streak_summary_row.dart` docstring says it mirrors
-  this formatting; keep them consistent if you change wording.
-- `~/src/utils/unified-design-system/motion.md` — the motion/haptic vocabulary from
-  prompt 01. **Prompt 01 must have run first.**
-
-## context you would otherwise rediscover
-
-- This app has **no `design_system` dependency** — `app/lib/ui/theme.dart` is a
-  hand-transcription of the shared tokens (values are byte-identical, names in
-  comments). Motion tokens from prompt 01 must be **transcribed into that local
-  theme file**, matching the existing convention. Do not add the dependency here;
-  that is a separate, larger refactor.
-- Capability baseline, verified 2026-08-16: **no audio package, no `assets:`
-  block, no `vibration` package, no VIBRATE permission.** The only existing
-  audio-adjacent thing is the `diet_guard_due_slot` notification channel
-  (`app/lib/services/notification_backend_io.dart` ~:17-18, :52-55) at
-  `Importance.high` with no explicit sound/vibration override — leave it alone.
-- The app already computes both a **logging streak** and an **adherence streak**
-  (`_daystatus.py:144`/`:153` on the Python side, mirrored in Dart). You are
-  making existing true data feel like something, not inventing a new metric.
-- diet-guard state lives under XDG (`~/.local/share/diet_guard`), unlike
-  screen-locker's in-repo JSON. Tests isolate it via
-  `~/src/diet-guard/diet_guard/tests/conftest.py:97` `_isolate_state`.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-04-screen-locker.md

@@ -1,173 +0,0 @@
-Surface the workout streak that screen-locker already tracks
-
-## findings (3, ranked by value over effort)
-
-1. **`snapshot.streak` is populated and no renderer reads it** — the cheapest
-   win in the whole project. Zero new state, zero conftest change, zero deps.
-2. **Week-transition reward strings are discarded into `_logger.info`** —
-   fully-formed celebratory sentences that never reach a user.
-3. **The success moment exists only on the lock screen**, for 1.5s. The status
-   window — the surface visited *voluntarily* — shows only enforcement.
-
-## what
-
-screen-locker computes a real workout streak and celebratory reward text, then
-throws almost all of it away. Verified 2026-08-16:
-
-- `StatusSnapshot` (`screen_locker/_status_types.py` ~:88-101) carries populated
-  `streak` and `early_bird_extended` fields, filled by
-  `_status_data.py` ~:210-214. **Grep confirms no renderer reads them.**
-- `_extra_benefits.py` `process_week_transition()` (~:82, reward strings built at
-  ~:130-139) produces fully-formed celebratory sentences — and
-  `_startup_checks.py` ~:57-58 sends them to `_logger.info` and nowhere else.
-- The one success moment that exists is on the **lock screen**:
-  `_unlock_view.py` `unlock_screen()` (~:25) paints "Great job! 💪" and
-  `🔥 {streak}-week streak`, for `_UNLOCK_DELAY_MS = 1500` before routing away.
-
-So the surface the user visits **voluntarily** — the status window, opened from
-the tray icon — shows enforcement and budget depletion, and no evidence of
-success at all. This is the cheapest high-value change in the whole project:
-the data already exists, is already true, and needs no new state.
-
-## where
-
-Repo: `~/src/screen-locker`.
-
-Primary:
-- `screen_locker/_status_sections.py` — the section renderers used by the status
-  window (`_section_*` functions). **177 lines; has headroom.** Add
-  `_section_streak` here.
-- `screen_locker/status_view.py` — `StatusWindow`, `render()`. Call the new
-  section from here. ⚠️ **246 lines — only 4 left under the 250 cap.** Expect to
-  extract something, or add the call in a way that costs ~1 line.
-- `screen_locker/_status_types.py` — `StatusSnapshot` (~:88-101), the fields you
-  are rendering. Read-only for this task.
-- `screen_locker/_extra_benefits.py` (179 lines) — `process_week_transition()`
-  and its reward strings; `current_streak()`, `has_extended_early_bird()`.
-- `screen_locker/_startup_checks.py` ~:57-58 — where the reward strings are
-  currently discarded into a log call.
-- `screen_locker/_unlock_view.py` (72 lines, lots of headroom) — the existing
-  success moment, if you extend it.
-
-## must
-
-- **Render the already-populated fields.** Add `_section_streak` to
-  `_status_sections.py` showing the weekly streak and the extended-early-bird
-  state, and call it from `status_view.py`'s `render()`.
-  Zero new state, zero conftest change, zero new dependency.
-- **Stop discarding the reward strings.** `process_week_transition()` returns
-  human-readable celebratory sentences that currently only reach the log. Surface
-  them where the user will actually see them — the status window is the obvious
-  home; a milestone is worth more than a silent counter increment.
-- Match the existing positive-status styling rather than inventing one:
-  `_status_sections.py` ~:73-78 already renders `"{n} above the weekly minimum!"`
-  in success green, and uses `✓` marks at ~:36 and ~:57.
-- Keep the streak **true**. It counts real ISO weeks with ≥5 counted workouts
-  (`_weekly_check.py`: `WEEKLY_WORKOUT_MINIMUM = 5`, `COUNTED_WORKOUT_TYPES =
-  {phone_verified, runnerup_verified, manual_workout}`). Do not round, pad, or
-  "encourage" the number.
-
-- must not: **make any reward reduce enforcement.** This is recorded in the
-  repo as a deliberate decision:
-  > `_startup_checks.py` — "there is no banked 'skip a workout' credit —
-  > that mechanic works against the goal of maximizing weekly workouts, so it was
-  > removed."
-
-  Every reward here is **display only**. Do not reintroduce a
-  banked skip, a streak freeze, a grace day, or any mechanic that lowers the
-  floor. A dopamine loop that lets you skip the workout defeats the app.
-- must not: **grant shutdown time for a streak, a week or a milestone.** The
-  weekly banked shutdown bonus (and the 4-week `_MILESTONE_INTERVAL` +1h) was
-  removed on purpose (2026-10-10): every shutdown minute comes from the
-  `earned_time` ladder and stops at its daily ceiling. Rewards here are display
-  only — no "+Nh" weekly reward, no bonus-hours field, no new shutdown source.
-- must not: add **sound** to any enforcement or lock path. screen-locker is a
-  self-restriction tool; a chime on lock is punishment audio, and a chime on
-  unlock trains the wrong association. This repo stays silent. (Sound is
-  opt-out-on elsewhere in the fleet; here it is simply absent.)
-- must not: add a write tool to the MCP server. `_mcp.py` ~:14-26 states it is
-  read-only by design. Adding `streak` to the existing `get_status` output is
-  fine; a new action tool violates a stated invariant.
-- must not: add `# noqa` (banned repo-wide) or a silent `except`
-  (`scripts/check_silent_failures.py` — every handler re-raises or logs at
-  warning or above).
-- must not: create a new on-disk state file unless genuinely unavoidable. If you
-  do, you **must** add it to `_ISOLATED_STATE` in
-  `screen_locker/tests/conftest.py` (~:134), listing *every* module that binds
-  the path at import time — a missed binding lets tests write to kuhy's real
-  state. Read the comment at ~:131-133 and the fixture docstring at ~:170-175.
-
-- optional: a daily streak alongside the weekly one. Note this **would** be new
-  state (the existing streak is consecutive-*weeks*), so it triggers the conftest
-  requirement above. diet-guard's consecutive-*day* streak
-  (`~/src/diet-guard/diet_guard/_daystatus.py` ~:144) is the precedent to mirror.
-
-## done
-
-1. Opening the status window (tray icon → click, or `screen-locker-status`) shows
-   the current streak and early-bird state — with the real values
-   from `extra_benefits_state.json`, not placeholders.
-2. A week-transition milestone reaches the UI instead of only `_logger.info`.
-3. `cd ~/src/screen-locker && python -m pytest` passes.
-4. `pre-commit run --files <changed files>` is clean — including the 250-line cap
-   (`scripts/check_file_length.py`) and the silent-failure check.
-5. `git diff` touches no enforcement logic: no change to lock decisions, weekly
-   minimums, or shutdown floors.
-
-## verify
-
-Desktop — this is a desktop Python app.
-
-```
-cd ~/src/screen-locker
-python -m screen_locker --status          # CLI: confirm the values it prints
-screen-locker-status                      # the Tk window: confirm they render
-```
-
-Paste both outputs. The CLI already prints the streak and early-bird state
-(`_status.py`), so it is your ground truth: the window must show the **same numbers**.
-If they disagree, the renderer is wrong, not the data.
-
-Current real state for comparison: `screen_locker/extra_benefits_state.json` and
-`screen_locker/workout_log.json` (12 days of entries, 2026-07-12 → 2026-08-15).
-
-## read first
-
-- `screen_locker/_status_sections.py` — every existing `_section_*`. Match their
-  signature and style; note the success-green precedent at ~:73-78.
-- `screen_locker/_status_types.py` ~:88-101 — the three fields you are rendering.
-- `screen_locker/_extra_benefits.py` — especially the module docstring ~:5-8
-  (the enforcement invariant) and the reward strings ~:130-139.
-- `screen_locker/_unlock_view.py` — the existing celebration, for tone.
-- `screen_locker/status_view.py` — check its line count **before** editing.
-- `~/src/screen-locker/CLAUDE.md` — repo rules (no silent failures, ruff `select=ALL`).
-
-## context you would otherwise rediscover
-
-- **`workout_log.json` is the single source of truth**, written only through
-  `_log_mixin.py` `write_signed_entry()` (~:82), HMAC-signed via
-  `gatelock.log_integrity`, deduped on `workout_id`. The Flutter app converges on
-  it via `_manual_push.py`. There is no second history — a streak computed from
-  it is authoritative.
-- All persistence is **JSON files, no sqlite**; paths declared in
-  `screen_locker/_constants.py`. The streak store is
-  `screen_locker/extra_benefits_state.json` (`consecutive_5plus_weeks`,
-  `last_processed_iso_week`, `extended_early_bird_iso_weeks`; a legacy
-  `weekly_shutdown_bonus_hours` map is ignored and dropped on the next write).
-- The threshold lives in `_extra_benefits.py`: `_BONUS_THRESHOLD = 5` (workouts
-  per week, for the streak and the early-bird extension). There is no milestone
-  constant any more.
-- **There is no config system** — no argparse, no env vars, no config file. Every
-  tunable is a module-level constant. An opt-out toggle has no existing home;
-  for a self-restriction tool, requiring a code edit to disable is arguably
-  correct, so prefer a constant in `_constants.py` over new state.
-- `~/gatelock` is **not** a repo — it is `~/src/utils/gatelock/gatelock/`, consumed as
-  a pinned git dep, and it holds no workout state.
-- Manual workouts were **not** removed: `_manual_workout.py` implements a
-  rate-limited, evidence-gated subsystem (budget 2 per 7 days, 10 per 30).
-- Three UI surfaces exist: the Tk status window (`status_view.py`), a GTK tray
-  icon at `~/.config/i3/scripts/screen_locker_tray.py` (outside the repo, shells
-  out to the CLI, refreshes every 60s), and the lock screen itself. No i3blocks
-  integration exists despite `format_summary_line` being described as one.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-05-workout-app.md

@@ -1,194 +0,0 @@
-Close the feedback asymmetry in workout_app
-
-## findings (4, ranked by value over effort)
-
-1. **Finishing a workout gets no cue** — while the rest timer gets sound *and*
-   an 800ms vibration. The app celebrates waiting and ignores achieving. All
-   infrastructure is already present; only the call is missing.
-2. **Set completion has no haptic** — the app's most repeated action, silent.
-3. **The fleet's only animation is an inline magic number** —
-   `Duration(milliseconds: 200)` in `exercise_tile_rows.dart`.
-4. **No sound opt-out exists** — the SQLite settings table is ready, but no
-   public accessor and no `SwitchListTile` anywhere. Step 2 only.
-
-## what
-
-workout_app is the only app in kuhy's fleet that can already play a sound and
-vibrate — and it spends that capability on the wrong moment. Verified 2026-08-16:
-
-- **Rest-timer expiry** gets a full cue: `_playBreakEndCue()` in
-  `lib/screens/workout_screen_session.dart` (~:128-145) plays
-  `assets/sounds/break_end.mp3` and fires `Vibration.vibrate(duration: 800)`.
-- **Finishing an entire workout** gets nothing. `_persistFinishedWorkout()` in
-  `lib/screens/workout_screen_finish.dart` (~:99-108) ends by showing
-  `WorkoutSummaryDialog` with no sound, no haptic, no animation.
-- **Completing a set** — the core repeated action of the whole app — gets no
-  haptic either. The `GestureDetector` at `lib/widgets/exercise_tile_rows.dart`
-  (~:145) toggles state silently.
-
-So the app celebrates *waiting* and ignores *achieving*. Fix the asymmetry: the
-moments worth reinforcing are completing a set and finishing a workout.
-
-This app also contains the fleet's **only animation** — a lone
-`AnimatedContainer(duration: Duration(milliseconds: 200))` at
-`exercise_tile_rows.dart` ~:146-147, with an inline magic number. Replace that
-number with a motion token while you are in the file.
-
-## where
-
-Repo: `~/src/screen-locker`. App: `~/src/screen-locker/stronglift_replacement/workout_app`
-(a Flutter app nested inside the screen-locker repo; that directory contains **no
-Python** — only the app and two design docs).
-
-Primary:
-- `lib/widgets/exercise_tile_rows.dart` — set-completion `GestureDetector` ~:145,
-  the `AnimatedContainer` ~:146-147.
-- `lib/screens/workout_screen_finish.dart` — `_persistFinishedWorkout()` ~:99-108.
-- `lib/widgets/workout_summary_dialog.dart` — `WorkoutSummaryDialog` ~:10.
-- `lib/screens/workout_screen_session.dart` — `_playBreakEndCue()` ~:128-145, the
-  existing cue to model the new ones on. Note its `.catchError` only
-  `debugPrint`s (~:131-137).
-- `lib/screens/workout_screen.dart` — `_audio = AudioPlayer()` ~:78, `vibration`
-  import ~:9.
-- `lib/widgets/rep_circle.dart` — `RepCircle` ~:34, per-set completion indicator.
-
-Progress/history surfaces (already rich; animate rather than rebuild):
-- `lib/screens/history_screen_charts.dart` — `_ProgressStatsCard` ~:71,
-  **`_StreakRow` ~:139**, `_WeightChart` ~:192.
-- `lib/screens/history_screen_painter.dart` — `_ChartPainter` ~:9, `paint()` ~:46,
-  `shouldRepaint` ~:121 (static; no animation today).
-- Streak data: `successStreak`/`failStreak` on `ExerciseState`
-  (`lib/services/storage_service.dart` ~:42-46).
-
-Settings (for the sound opt-out):
-- `lib/screens/settings_screen.dart` — `build()` ~:166, `ListView` ~:174-208.
-  Parts: `settings_screen_rows.dart`, `settings_screen_sections.dart`,
-  `settings_screen_exercise_sections.dart`, `settings_screen_thresholds.dart`,
-  `settings_screen_widget.dart`, `settings_screen_actions.dart`.
-  **No `SwitchListTile` exists** — model a new section on `_SyncSection`
-  (`settings_screen_sections.dart` ~:14) or `_OfflineBackupSection`.
-- Store: **SQLite**, not SharedPreferences. There is a ready-made key/value table
-  — schema `lib/services/storage_service_schema.dart` ~:34-36
-  (`CREATE TABLE settings (key TEXT PRIMARY KEY, value TEXT NOT NULL)`, migration
-  ~:64-65), accessors `lib/services/storage_service.dart` ~:122-137
-  (`_getSetting`/`_setSetting`, both **private** — add a public typed wrapper like
-  the existing `setLastWorkoutType`). Already backed up/restored via
-  `lib/services/storage_service_backup.dart` ~:23, :43, :156-163.
-
-Theme: `lib/ui/theme.dart` — local hand-copy, **no `design_system` dependency**
-(`buildAppTheme()` ~:12, `AppStatusColors` ~:76, `AppSpacing` ~:111,
-`AppRadius` ~:133, `AppTextSize`). Wired at `lib/main.dart` ~:115.
-
-## must
-
-**Step 1 — motion + haptics (no new dependency).**
-
-- Add `HapticFeedback.selectionClick()` on **set completion** — the tap at
-  `exercise_tile_rows.dart` ~:145. This is the app's most repeated action; it
-  should feel like flipping a physical switch. Fire on tap, not after the write.
-- Add a completion cue when a **workout finishes** — haptic plus a visible
-  arrival for `WorkoutSummaryDialog`, rather than it appearing instantly.
-- Replace the inline `Duration(milliseconds: 200)` at ~:146-147 with the motion
-  token from prompt 01, transcribed into `lib/ui/theme.dart`.
-- Animate the streak/stat numbers on the history screen to their new values
-  instead of snapping. `_ChartPainter.shouldRepaint` currently returns a static
-  result — leave the chart itself alone unless animating it is cheap.
-- Honour `MediaQuery.of(context).disableAnimations` — durations collapse to zero;
-  haptics and sound still fire.
-- `VIBRATE` is already granted (`android/app/src/main/AndroidManifest.xml` ~:10)
-  and `vibration: ^3.1.0` is already a dependency. Prefer `HapticFeedback` from
-  `flutter/services.dart` for short UI taps and reserve the `vibration` package
-  for the long timed buzz it already does well.
-
-**Step 2 — sound (separate, independently revertable).**
-
-- Add a finish-workout cue asset alongside `assets/sounds/break_end.mp3`
-  (declared at `pubspec.yaml` ~:52-53 — **this is the fleet's only `assets:`
-  block**, so you are adding a file, not the block).
-- Sound ships **on**, with an opt-out. Add a public
-  `getSoundEnabled()`/`setSoundEnabled(bool)` on `StorageService` wrapping
-  `_getSetting`/`_setSetting` (store `'true'`/`'false'`), then a settings section
-  with a `SwitchListTile`.
-- The toggle must silence the **new** cues and the existing break-end cue alike —
-  one switch, not two behaviours.
-
-**Both steps:**
-
-- must not: **reward the weight or rep number.** The cue fires on *logging a set*
-  and *finishing a workout*, not on hitting a PB or beating last week. Rewarding
-  the number pushes toward misreporting; rewarding the record keeps the data
-  honest. A deloaded set gets the same confirmation as a PB.
-- must not: fabricate the streak. `successStreak`/`failStreak` count real
-  outcomes; display them as they are.
-- must not: add a cue to *deleting* a set or workout.
-- must not: silently swallow an audio error. The existing `.catchError` →
-  `debugPrint` at ~:131-137 is the local precedent; do not make it quieter.
-- must not: break the **100% coverage gate** — new public methods on
-  `StorageService` need tests. See the comments at
-  `settings_screen_sections.dart` ~:1-11.
-- must not: exceed the **250-line cap** on any file.
-
-- optional: a subtle near-miss cue on the history screen when a streak is one
-  workout short of a milestone — legitimate only because the number is true.
-
-## done
-
-1. Completing a set produces an immediate haptic on the phone.
-2. Finishing a workout produces a haptic and a visible dialog arrival; step 2
-   adds a sound.
-3. No inline animation duration remains in `exercise_tile_rows.dart`.
-4. `cd ~/src/screen-locker/stronglift_replacement/workout_app && flutter analyze` clean.
-5. `flutter test` passes **and coverage stays at 100%**.
-6. With OS "remove animations" on, the app works and durations are zero.
-7. Step 2: the settings toggle flips, persists across restart, and silences both
-   the new cues and the existing break-end cue.
-
-## verify
-
-**On the phone.**
-
-```
-adb devices                      # confirm 23181JEGR08034
-cd ~/src/screen-locker/stronglift_replacement/workout_app
-flutter build apk --release
-adb install -r build/app/outputs/flutter-apk/app-release.apk
-```
-
-Never `flutter install`, never `adb uninstall`, never `pm clear` — those wipe the
-SQLite workout history. `adb install -r` preserves it.
-
-Then run a real set on the device: tap a set complete, finish a workout, and
-report what the phone actually did. Haptics and sound are physical outcomes —
-state what you felt and heard; do not infer them from the code.
-
-## read first
-
-- `lib/screens/workout_screen_session.dart` ~:128-145 — `_playBreakEndCue()`, the
-  working cue. Your new cues should look like it.
-- `lib/widgets/exercise_tile_rows.dart` — the set-completion tap and the fleet's
-  only `AnimatedContainer`.
-- `lib/services/storage_service.dart` ~:122-137 — `_getSetting`/`_setSetting`, and
-  `setLastWorkoutType` as the public-wrapper pattern.
-- `lib/screens/settings_screen_sections.dart` ~:1-11 — the coverage/line-cap
-  comments, and `_SyncSection` as the section pattern.
-- `~/src/utils/unified-design-system/motion.md` — motion/haptic vocabulary from
-  prompt 01. **Prompt 01 must have run first.**
-
-## context you would otherwise rediscover
-
-- This app has **no `design_system` dependency**; `lib/ui/theme.dart` is a
-  hand-transcription of the shared tokens. Motion tokens must be transcribed
-  there, matching the existing convention. Do not add the dependency here.
-- `shared_preferences` **is** a dependency but is used only for the device id
-  (`lib/services/sync_device_id.dart` ~:37-38). Settings go in SQLite.
-- Non-motion `Duration`s that are **not** animation and must not be touched:
-  rest tickers (`workout_screen.dart` ~:91, `workout_screen_breaks.dart` ~:20,
-  `workout_screen_session.dart` ~:37 — 1s), settings debounces
-  (`settings_screen.dart` ~:140, :148 — 600ms), `main.dart` ~:56 (20s).
-- The app syncs to the screen-locker Python side, which treats
-  `screen_locker/workout_log.json` as the single source of truth. **Do not change
-  what counts as a workout** — enforcement depends on it, and it is out of scope.
-- The repo enforces a 250-line file cap and bans `# noqa`; ruff runs
-  `select = ["ALL"]` on the Python side.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-06-todo.md

@@ -1,182 +0,0 @@
-Adopt the motion tokens in todo, and make capture feel immediate
-
-## findings (3, ranked by value over effort)
-
-1. **Capture gives no confirmation** — a successful capture is indistinguishable
-   from a no-op unless you go looking for the note.
-2. **Zero motion, zero haptics** — despite being the only app already wired to
-   the shared package, so adoption here is cheapest.
-3. **The pinned `design_system` tag predates the motion tokens** — nothing
-   compiles until the ref is bumped. Easy to forget, fatal if skipped.
-
-## what
-
-`todo` is the only app in kuhy's fleet already wired to the shared
-`design_system` package — it has **deliberately no local `theme.dart`** (the
-pubspec comment says so: nothing to drift from the frozen table). That makes it
-the cheapest place to adopt the motion tokens added by prompt 01, and the
-reference implementation the other apps get compared against.
-
-Today it has **zero motion and zero haptics**. Verified 2026-08-16: no
-`Animated*`, no `AnimationController`, no `HapticFeedback`, no audio. Its only
-progress UI is the note-editor wizard bar. Capturing a note — the app's whole
-purpose, and the thing that has to feel frictionless enough to actually do —
-gives nothing back beyond a toast on error.
-
-Per kuhy's rule for this project: **reward the capture, never the completion
-count.** A todo app that celebrates finishing things teaches you to log easy
-things; one that celebrates *capturing* keeps the backlog honest.
-
-## where
-
-Repo: `~/src/todo`.
-
-**First step — bump the dependency.** `pubspec.yaml` pins `design_system` at git
-ref `design_system-v0.1.0`, which predates the motion tokens. Bump it to
-**`design_system-v0.2.0`** (cut by prompt 01) or the tag that prompt actually
-printed. Without this, `AppDuration` does not exist and nothing else here compiles.
-
-Primary:
-- `lib/ui/capture_screen.dart`, `lib/ui/capture_screen_widget.dart`,
-  `lib/ui/capture_screen_sync.dart` — the capture path. `showError` ~:76 and
-  `showToast` ~:78 in `capture_screen_sync.dart` are the fleet's only uses of the
-  shared feedback helpers.
-- `lib/ui/capture_app_bar.dart` — progress indicators ~:66, :84.
-- `lib/ui/note_editor.dart` — `showError` ~:115.
-- `lib/ui/note_editor_step_page.dart` ~:80 — `LinearProgressIndicator(value:
-  (index+1)/total)`, the wizard step bar. The one honest progress surface.
-- `lib/ui/notes_list_screen.dart` — `_searchDebounce = 250ms` ~:45 (**not**
-  animation; do not tokenise it).
-- `lib/ui/notes_list_navigation.dart`, `lib/ui/settings_screen.dart` (2×),
-  `lib/ui/capture_screen.dart` — the `MaterialPageRoute` sites, all using the
-  default platform transition.
-
-Settings — **this app has the only working toggle in the fleet; it is the
-pattern the other prompts copy**:
-- `lib/ui/settings_screen.dart` ~:213-225 — `ValueListenableBuilder<AppSettings>`
-  wrapping a `SwitchListTile`; setter ~:111-140 (logs an `AnalyticsEvent`, opens
-  a Firebase client, calls `withAdvancedMode`).
-- `lib/data/app_settings.dart` — `AppSettings` immutable class,
-  `SharedPreferences` keys ~:38-39, `load()` ~:42, `withAdvancedMode` ~:60,
-  `reconcileWithRemote` ~:98, `adopt` ~:132 (last-writer-wins cross-device sync
-  via `settings/advancedMode` ~:20). Held app-wide as a `ValueNotifier`.
-
-Theme: no local file. `lib/main.dart` ~:4 imports `design_system`; ~:60-61 wires
-`theme: buildLightTheme(), darkTheme: buildDarkTheme()`. Source of truth is
-`~/src/utils/design_system/lib/src/theme.dart`.
-
-## must
-
-**Step 1 — motion + haptics (no new dependency).**
-
-- Bump `design_system` to the new tag **first**, and confirm `AppDuration` /
-  `AppCurve` resolve before writing any other code.
-- Add `HapticFeedback.selectionClick()` (or the token vocabulary's "confirm" cue)
-  on **successful note capture**. `HapticFeedback` comes from
-  `package:flutter/services.dart` — no pubspec change. Add
-  `<uses-permission android:name="android.permission.VIBRATE"/>` to
-  `android/app/src/main/AndroidManifest.xml`; it is absent today.
-- Fire the haptic **on the tap**, not after the Firebase sync returns. The whole
-  point of the micro-animation idea is that immediate feedback removes the
-  perceived latency; a cue gated on a network round-trip reintroduces it.
-- Give the capture a visible confirmation — currently a successful capture is
-  indistinguishable from a no-op unless you go looking.
-- Animate the wizard `LinearProgressIndicator` between steps rather than jumping.
-- Apply the shared page-transition/motion tokens to the `MaterialPageRoute` sites
-  so navigation matches the rest of the system.
-- Honour `MediaQuery.of(context).disableAnimations`: durations collapse to zero,
-  haptics still fire.
-
-**Step 2 — sound (separate, independently revertable).**
-
-- Add an audio dependency and an `assets:` block to `pubspec.yaml` (neither
-  exists) plus a short capture-confirm cue.
-- Sound ships **on**, with an opt-out `SwitchListTile` — copy the
-  `advancedMode` pattern verbatim (widget ~:213-225, setter ~:111-140, field in
-  `app_settings.dart`). It is the fleet's proven toggle; do not invent a new one.
-- Consider whether the sound preference should sync across devices like
-  `advancedMode` does, or stay local. Local is the safer default — a per-device
-  audio choice is usually what people mean.
-
-**Both steps:**
-
-- must not: reward **completing** a todo more than capturing one. No streak on
-  completions, no counter that makes finishing feel better than recording. The
-  backlog is only useful if capture stays frictionless and honest.
-- must not: add a variable/random reward to capture. There is no real pool to
-  draw from here, so any variance would be manufactured — which fails the
-  project's second test.
-- must not: fabricate progress. The wizard bar's `(index+1)/total` is true; keep
-  it that way.
-- must not: hand-copy token values into a local `theme.dart`. This app
-  deliberately has none — that is a feature, and the pubspec comment says so.
-- must not: add `# noqa`-equivalents or suppress analyzer warnings.
-
-- optional: animate the notes-list reordering/filtering, if it falls out cheaply
-  from the shared tokens.
-
-## done
-
-1. `pubspec.yaml` references the new `design_system` tag and `flutter pub get`
-   resolves it.
-2. Capturing a note produces a haptic within ~50ms of the tap and a visible
-   confirmation.
-3. Wizard step transitions and page navigation use shared motion tokens; no
-   inline `Duration` remains for animation purposes (the 250ms search debounce
-   and 5s auto-sync debounce stay as they are — they are not motion).
-4. `cd ~/src/todo && flutter analyze` is clean.
-5. `cd ~/src/todo && flutter test` passes.
-6. With OS "remove animations" enabled, the app works and durations are zero.
-7. Step 2: the sound toggle flips, persists across restart, and silences the cue.
-
-## verify
-
-**On the phone — todo is mobile-primary.**
-
-```
-adb devices                      # confirm 23181JEGR08034
-cd ~/src/todo
-flutter build apk --release
-adb install -r build/app/outputs/flutter-apk/app-release.apk
-```
-
-Never `flutter install`, never `adb uninstall`, never `pm clear` — those wipe
-real notes. `adb install -r` preserves them.
-
-Then capture a real note on the device and report what the phone did. A haptic is
-a physical outcome: say what you felt, do not infer it from code. Also step
-through the note-editor wizard to confirm the progress bar animates.
-
-If the app also has a desktop/web surface deployed under `/opt/`, note that it
-can go stale independently — but this prompt's done-condition is the phone.
-
-## read first
-
-- `lib/ui/settings_screen.dart` ~:213-225 and `lib/data/app_settings.dart` — the
-  toggle pattern, in full, before writing the sound switch.
-- `lib/ui/capture_screen_sync.dart` ~:76-78 — how `showToast`/`showError` are
-  used today; the shared helpers live in
-  `~/src/utils/design_system/lib/src/feedback.dart`.
-- `~/src/utils/design_system/lib/src/feedback.dart` — `showToast`/`showError`, `_show`
-  ~:50. `confirm.dart` beside it **already imports `flutter/services.dart`**, so
-  if prompt 01 added a shared haptic helper it lives near here.
-- `~/src/utils/unified-design-system/motion.md` — the vocabulary from prompt 01.
-  **Prompt 01 must have run first, and its tag must be cut.**
-- `pubspec.yaml` — read the comment explaining why there is no local theme.
-
-## context you would otherwise rediscover
-
-- `showToast` and `showError` already carry fixed dwell times in the shared
-  package (`_toastDuration = 3s`, `_errorDuration = 5s`,
-  `feedback.dart` ~:14, :18). Those are **not** motion tokens; leave them.
-- This is the **only** app on `design_system`. diet-guard, workout_app and
-  wake_alarm hand-transcribe tokens into local theme files, so a widget copied
-  from this app into one of those will not compile unmodified.
-- The app has no streaks, no rings, no history charts, and no completion counts
-  today. That is a deliberate starting point for this prompt, not an oversight to
-  fix wholesale.
-- Settings sync cross-device last-writer-wins through Firebase
-  (`settings/advancedMode`). If you add a synced preference, follow
-  `reconcileWithRemote`/`adopt`; if local-only, skip that path entirely.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-07-dufs-theme.md

@@ -1,141 +0,0 @@
-Wire dufs-cloud's Flutter app to the shared design_system
-
-## findings (2, ranked by value over effort)
-
-1. **`app/lib/ui/theme.dart` is a fifth, uncompared palette copy** — hand-copied
-   hexes that `palette_check.py` has never seen, so it can drift silently while
-   CI stays green.
-2. **The web half of the same repo is wired correctly** — which makes the
-   Flutter half's divergence an accident, not a decision.
-
-## what
-
-`~/src/dufs-cloud/app/lib/ui/theme.dart` is a **fifth, uncompared copy of the
-palette**. Verified 2026-08-16: the Flutter app has no `design_system`
-dependency at all — it hand-restates every hex (`Color(0xFF211D1B) // ink`,
-`Color(0xFFB8862E) // accent`, …) with the shared token names appearing only in
-comments. `palette_check.py` has never seen this file, so it can drift from the
-frozen table silently and CI will stay green.
-
-The web half of the same repo is wired correctly (`@kuhyx/web-ui`), which makes
-the Flutter half's divergence an accident rather than a decision.
-
-Fix the root cause: add the dependency, replace the hand-copied hexes with token
-references, and delete the duplicate. This must land **before** prompt 08 adds
-motion to this app, so that motion tokens arrive through the package instead of
-becoming a sixth hand-copy.
-
-## where
-
-Repo: `~/src/dufs-cloud`. Flutter app: `~/src/dufs-cloud/app` (package `dufs_client`).
-
-- `app/pubspec.yaml` — current deps: `archive, cupertino_icons, flutter,
-  flutter_secure_storage, http, image_picker, media_kit*, path, path_provider,
-  share_plus, shared_preferences, webview_flutter, xml`. **No `design_system`.**
-- `app/lib/ui/theme.dart` — the hand-copy to eliminate.
-- Every file referencing a colour from it — find them with a grep for the theme's
-  exported symbols rather than trusting any list here.
-
-Source of truth:
-- `~/src/utils/design_system/lib/src/tokens.dart` — `AppPalette`, `AppSpacing`,
-  `AppRadius`, `AppTextSize` (plus `AppDuration`/`AppCurve` if prompt 01 ran).
-- `~/src/utils/design_system/lib/src/theme.dart` — `buildLightTheme()`,
-  `buildDarkTheme()`.
-
-Reference implementation: `~/src/todo` is the only app already on the package. Its
-`pubspec.yaml` uses a **git ref** (`design_system-v0.1.0`) and it has
-deliberately **no local `theme.dart`**. Copy that shape.
-
-## must
-
-- Add `design_system` to `app/pubspec.yaml` using the **git ref** style matching
-  `~/src/todo` — not a local `path:` dependency. One dependency convention across the
-  fleet. Pin the tag prompt 01 cut (`design_system-v0.2.0` or whatever it
-  printed); if prompt 01 has not run, pin `design_system-v0.1.0` and let prompt
-  08 do the bump.
-- Replace every hand-copied hex in `app/lib/ui/theme.dart` with the corresponding
-  token reference. **Verify each swap is value-identical before making it** — the
-  survey found the values byte-identical today, but confirm rather than assume;
-  a silent colour change in a live app is a real regression.
-- Delete the duplicated token declarations once nothing references them. If the
-  app declares helper classes the shared package lacks, keep only those, and say
-  in the session summary which ones survived and why.
-- Keep the app's visual output **identical**. This is a pure de-duplication: if
-  anything looks different afterwards, a value was wrong and you have found a
-  pre-existing drift — report it rather than papering over it.
-
-- must not: change any colour, spacing, radius or type **value**. The shared
-  table is a freeze. If a value genuinely disagrees, stop and surface it — that
-  is a finding, and kuhy decides which side is canonical.
-- must not: add motion/animation here. That is prompt 08. This prompt is
-  dependency plumbing only, so that a visual regression has exactly one possible
-  cause.
-- must not: touch `~/src/dufs-cloud/web/` — its `@kuhyx/web-ui` wiring is already
-  correct.
-- must not: leave a partial migration. Either the local theme file is gone (or
-  reduced to app-specific extras) and everything resolves through the package, or
-  the change is not done. A half-migrated theme is worse than the current state
-  because it hides *which* copy is authoritative.
-
-- optional: once migrated, add `app/lib/ui/theme.dart`'s path to the structural
-  checker from prompt 02 if that is now meaningful. Probably it is not — after
-  this prompt there is nothing left there to compare.
-
-## done
-
-1. `app/pubspec.yaml` declares `design_system` at a git ref; `flutter pub get`
-   resolves.
-2. No hard-coded palette hex remains in `app/lib/`. A grep for `Color(0xFF` in
-   `app/lib/ui/theme.dart` returns nothing (or only app-specific values that are
-   not palette tokens — name them if so).
-3. `cd ~/src/dufs-cloud/app && flutter analyze` is clean.
-4. `cd ~/src/dufs-cloud/app && flutter test` passes.
-5. The app looks **the same** as before on device — verified by screenshot
-   comparison, not by reasoning about the diff.
-6. `python3 ~/src/utils/unified-design-system/scripts/palette_check.py` still exits 0.
-
-## verify
-
-**On the phone**, and with a before/after comparison — a pure refactor is only
-verified by showing nothing changed.
-
-```
-adb devices
-cd ~/src/dufs-cloud/app
-flutter build apk --release
-adb install -r build/app/outputs/flutter-apk/app-release.apk
-```
-
-Take a screenshot of the browser screen and the settings screen **before**
-starting (from the currently installed build) and after, and compare them. Never
-`adb uninstall` or `pm clear` — the app holds a stored credential
-(`flutter_secure_storage`) and wiping it means re-authenticating.
-
-## read first
-
-- `~/src/dufs-cloud/app/lib/ui/theme.dart` — in full, before touching anything. The
-  comments naming each token are your mapping table.
-- `~/src/todo/pubspec.yaml` — the git-ref dependency line to copy, and the comment
-  explaining why no local theme exists.
-- `~/src/utils/design_system/lib/src/tokens.dart` — the canonical names.
-- `~/src/dufs-cloud/DESIGN_AUDIT_TODO.md` — a prior audit of this repo; check whether
-  it already records theme findings so you do not contradict it.
-
-## context you would otherwise rediscover
-
-- The web half consumes `@kuhyx/web-ui` at tag **`web_ui-v0.3.1`**, declared in
-  `~/src/dufs-cloud/web/package.json` as
-  `"github:kuhyx/utils#web_ui-v0.3.1&path:/web_ui"`. It is correctly wired; the
-  only app-local CSS value is `--overlay: rgba(33, 29, 27, 0.82)` in
-  `web/src/index.css`. Prompt 08 bumps that tag — not this prompt.
-- `@kuhyx/web-ui` is **pnpm-only**; npm cannot install a monorepo subdirectory.
-  Irrelevant here (this prompt is Flutter-only) but fatal if you wander into
-  `web/`.
-- `palette_check.py` compares four sources and has never included this file, so
-  "CI is green" told you nothing about it. That is the whole reason this prompt
-  exists.
-- Three other Flutter apps (diet-guard, workout_app, wake_alarm) have the same
-  hand-copy pattern. They are **out of scope** — migrating them is a separate,
-  larger job, and doing one app properly is the point here.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-08-dufs-motion.md

@@ -1,198 +0,0 @@
-Give dufs-cloud real latency feedback on its slow operations
-
-## findings (4, ranked by value over effort)
-
-1. **No cancel on the unbounded index walk or the ZIP build** — the real
-   usability failure, and worth more than any animation.
-2. **Slow operations report one static string** — the walk and the zip both know
-   real counts and discard them.
-3. **No `prefers-reduced-motion` block anywhere in 806 lines of CSS** — a
-   straight accessibility gap.
-4. **Long-press multi-select has no haptic** — the canonical place for one.
-
-## what
-
-dufs-cloud has genuinely slow operations and tells the user almost nothing while
-they run. Verified 2026-08-16:
-
-- The **recursive cloud index walk** lists every directory in the cloud,
-  unbounded. Web shows one static string `"Indexing cloud…"`; Flutter shows one
-  indeterminate `CircularProgressIndicator`. **No count, no current path, no
-  cancel** on either side.
-- The **multi-file ZIP build** downloads every selected file's bytes into memory
-  and then zips them, with `setBusy('Preparing N item(s)…')` — a single static
-  string for the entire operation. Neither `buildSelectionZip` signature even
-  accepts a progress callback.
-- Web's entire 806-line `index.css` contains **exactly one transition**
-  (`.tile-actions { transition: opacity 0.12s }` ~:539-544), zero `@keyframes`,
-  and **no `prefers-reduced-motion` block at all**.
-- Flutter side has **zero animations and zero haptics** — notably
-  `browser_screen.dart` (~:95) enters multi-select on **long-press** with no
-  `HapticFeedback.selectionClick()`, the canonical place for one.
-
-This is the article's micro-animation point in its most defensible form: replace
-dead latency with honest, informative feedback. Nothing here needs a manufactured
-reward — the operations are genuinely slow and the progress is genuinely knowable.
-
-## where
-
-Repo: `~/src/dufs-cloud`. Web: `web/`. Flutter: `app/` (package `dufs_client`).
-
-**First step — bump both dependencies** to pick up prompt 01's motion tokens:
-- `web/package.json`: `"@kuhyx/web-ui": "github:kuhyx/utils#web_ui-v0.3.1&path:/web_ui"`
-  → bump to **`web_ui-v0.3.2`** (or whatever tag prompt 01 printed).
-  **pnpm only** — npm cannot install a monorepo subdirectory and will lock the repo.
-- `app/pubspec.yaml`: bump `design_system` to the tag prompt 01 cut.
-  **Prompt 07 must have run first** — it is what adds this dependency at all.
-
-Slow operations (the highest-value targets):
-- Index walk — web `web/src/hooks/use-cloud-index.ts` (`walkInto` ~:36-43, root
-  walk ~:56-63, `loading` derived ~:113); Flutter
-  `app/lib/services/cloud_index.dart` (`buildCloudIndex` ~:25, `_walk` ~:31-41),
-  driven by `app/lib/screens/browser_screen.dart` `_ensureIndex()` ~:184-194.
-- ZIP build — web `web/src/lib/download.ts` (`gatherFiles` ~:24,
-  `buildSelectionZip` ~:37-47, `saveBytes` ~:55; encoder `web/src/lib/zip.ts`
-  `zipStore` ~:32), triggered from `web/src/components/gallery.tsx` ~:307;
-  Flutter `app/lib/services/download_zip.dart` (`gatherFiles` ~:15,
-  `buildSelectionZip` ~:29-37).
-- Upload — web `gallery.tsx` ~:186; Flutter
-  `app/lib/services/dufs_client.dart` `upload()` ~:73-81 (a plain `_http.put`
-  with the full body — **not** a `StreamedRequest`, so byte progress is not
-  currently observable), called from `browser_screen.dart` ~:339.
-- Bulk mutations, all single static strings in `gallery.tsx`: move ~:211/:271,
-  delete ~:229/:290 (the bulk delete loops per item and reports only a final
-  failure count), rename ~:243, create dir ~:257.
-- Directory listing — web `web/src/hooks/use-listing.ts` ~:31-72; Flutter
-  `browser_screen.dart` ~:120/:140/:149/:155.
-
-Other surfaces:
-- `web/src/index.css` (806 lines; `.busy` styled ~:87 — static text, no shimmer).
-- `web/src/components/filter-bar.tsx` ~:75-83 — the search input fires `onFilter`
-  on **every keystroke with no debounce**.
-- `web/src/components/gallery.tsx` ~:454 `{loading && <p className="muted">Loading…</p>}`,
-  ~:355 the `busy` span; `folder-picker.tsx` ~:97.
-- Flutter spinners: `browser_screen.dart` ~:717, ~:732, `RefreshIndicator` ~:748
-  (the one built-in motion affordance), plus `text_editor_screen.dart` ~:101/:80,
-  `audio_screen.dart` ~:104, `video_screen.dart` ~:169, `pdf_screen.dart` ~:184,
-  `app/lib/widgets/folder_picker.dart` ~:92.
-- Settings: `app/lib/screens/settings_screen.dart` (93 lines — room for a toggle),
-  store `app/lib/services/settings.dart`.
-
-## must
-
-**Step 1 — motion + honest progress (the valuable half).**
-
-- Make the index walk report **real progress**: directories walked, files found,
-  and ideally the current path. The walk already knows these numbers — it just
-  discards them. Thread a progress callback through `buildCloudIndex`/`walkInto`.
-- Make the ZIP build report **per-file progress** (`3 of 47`). Both
-  `buildSelectionZip` signatures need a progress callback added; today neither
-  accepts one.
-- Add a **cancel** to both. A long unbounded operation with no way out is the
-  actual usability failure here, and it is more valuable than any animation.
-- Add `HapticFeedback.selectionClick()` on the Flutter **long-press to
-  multi-select** (`browser_screen.dart` ~:95). No dependency needed
-  (`flutter/services.dart`); add `<uses-permission
-  android:name="android.permission.VIBRATE"/>` to the manifest if absent.
-- Add a `@media (prefers-reduced-motion: reduce)` block to `web/src/index.css`.
-  **There is none today** — this is a straight accessibility gap, not a nicety.
-  Flutter side: honour `MediaQuery.of(context).disableAnimations`.
-- Use the shared motion tokens for any transition you add. Replace the inline
-  `0.12s` at `index.css` ~:539-544 with the token while you are there.
-- Debounce the search input (`filter-bar.tsx` ~:75-83). Firing on every keystroke
-  over a large index is the cause of jank, and no animation fixes that.
-
-**Step 2 — sound (separate, independently revertable).**
-
-- A completion cue for long operations only (index built, ZIP ready, upload
-  finished) — **not** for navigation or selection. A file manager that chirps on
-  every click is intolerable.
-- Sound ships **on**, with an opt-out toggle in
-  `app/lib/screens/settings_screen.dart` backed by `app/lib/services/settings.dart`,
-  and an equivalent on web.
-- Consider suppressing the cue when the operation finishes in under ~2s — a
-  completion sound for something that felt instant is noise.
-
-**Both steps:**
-
-- must not: **fake progress.** No indeterminate bar dressed up as determinate, no
-  bar that advances on a timer, no "estimated" percentage that is really elapsed
-  time. If a total is unknown, show the count that *is* known ("47 files found")
-  rather than a fabricated fraction. This is the project's first test and the
-  easiest place in the fleet to violate it.
-- must not: add a variable/random reward. There is no real pool here; any
-  variance would be manufactured.
-- must not: change what the index actually contains, or filter/sort semantics
-  (`web/src/lib/filter-sort.ts`, `app/lib/util/filter_sort.dart` mirror each
-  other — a change to one desyncs the port).
-- must not: use npm in `web/`. **pnpm only.**
-- must not: let web and Flutter drift further apart. If you add a progress
-  callback on one side, add the equivalent on the other, or state explicitly in
-  the summary why not.
-
-- optional: skeleton screens for the directory listing instead of "Loading…".
-  Genuinely useful for perceived latency, but lower value than cancel + real
-  counts. Do it only after step 1 lands.
-
-## done
-
-1. Starting a cloud index shows a live, **true** count and can be cancelled — on
-   both web and Flutter.
-2. A multi-file ZIP shows per-file progress and can be cancelled.
-3. `web/src/index.css` has a `prefers-reduced-motion` block; with the OS setting
-   on, transitions are suppressed.
-4. Long-press multi-select produces a haptic on the phone.
-5. `cd ~/src/dufs-cloud/web && pnpm install && pnpm build && pnpm test` passes
-   (use the repo's actual script names).
-6. `cd ~/src/dufs-cloud/app && flutter analyze && flutter test` clean.
-7. No fabricated progress value anywhere in the diff.
-
-## verify
-
-**Both surfaces — this repo has two and they drift.**
-
-Web: run the dev server, open it in a real browser, and index a directory large
-enough to take several seconds. Confirm the count moves, the cancel works, and
-the numbers are real (cross-check the final count against the actual file count).
-A jsdom test cannot verify this — it has no layout and no perceived latency.
-
-Flutter, on the phone:
-```
-adb devices
-cd ~/src/dufs-cloud/app
-flutter build apk --release
-adb install -r build/app/outputs/flutter-apk/app-release.apk
-```
-Never `adb uninstall`/`pm clear` — the app holds a stored credential.
-
-Then trigger a real index build and a real multi-file ZIP on the device and
-report what you saw. State the haptic as a physical observation.
-
-## read first
-
-- `web/src/hooks/use-cloud-index.ts` and `app/lib/services/cloud_index.dart` —
-  read both before changing either; they mirror each other deliberately.
-- `web/src/lib/download.ts` and `app/lib/services/download_zip.dart` — same.
-- `web/src/components/gallery.tsx` — the `setBusy` call sites; they are the
-  inventory of every operation currently reduced to one static string.
-- `~/src/dufs-cloud/DESIGN_AUDIT_TODO.md` — prior findings for this repo.
-- `~/src/utils/unified-design-system/motion.md` — vocabulary from prompt 01.
-
-## context you would otherwise rediscover
-
-- **Prompt 07 must have run first.** Until it does, `app/` has no
-  `design_system` dependency and hand-restates the palette in
-  `app/lib/ui/theme.dart`.
-- Web tokens come from `@kuhyx/web-ui` imported in `web/src/main.tsx`;
-  `web/src/index.css` declares only `--overlay`. New tokens arrive **only** after
-  the tag bump — this is the step that is easy to forget and silently produces
-  "the variable doesn't exist".
-- `upload()` uses a non-streaming `_http.put`, so real byte-level upload progress
-  needs a `StreamedRequest` refactor. That may be more than this prompt wants —
-  if you skip it, say so explicitly and report per-**file** progress instead of
-  per-byte rather than faking a byte percentage.
-- Media playback (`web/src/hooks/use-dash-player.ts`, `web/src/lib/dash-buffer.ts`,
-  `app/lib/services/app_player.dart`) has its own buffering states. Out of scope
-  unless trivially adjacent.
-
-REMOVE ME AFTER FINISH

dopamine-ux/TODO-09-wake-alarm.md

@@ -1,164 +0,0 @@
-Add motion and haptics to the wake-alarm phone app
-
-## findings (2, ranked by value over effort)
-
-1. **Setting an alarm gives no confirmation or haptic** — and since the real
-   alarm lives in another app entirely, confirming the handoff is the only
-   reassurance this app can offer.
-2. **Zero motion, and the thinnest local theme in the fleet** — it lacks
-   `AppSpacing`/`AppRadius`/`AppTextSize`, so widgets copied from sibling apps
-   will not compile here.
-
-## what
-
-`~/src/wake-alarm/phone_app` is the smallest surface in this project: 12 Dart files,
-a sync companion that sets a time, syncs it, and hands off to the system clock
-app. It has **zero motion, zero haptics, zero audio, zero progress feedback** —
-verified 2026-08-16. Its settings screen is a 56-line `StatelessWidget` with two
-`ListTile`s and no state at all.
-
-Bring it up to the fleet's baseline: a confirmation the alarm was actually set,
-motion tokens on its transitions, and a haptic on the one action that matters.
-
-**This app is deliberately last and deliberately small.** It also carries the
-project's sharpest hazard — see `must not` about alarm audio.
-
-## where
-
-Repo: `~/src/wake-alarm`. Flutter app: `~/src/wake-alarm/phone_app` (**underscore**, not
-`phone-app`). The repo root is a Python package; the Flutter app is only the
-`phone_app/` subdirectory.
-
-Primary:
-- `phone_app/lib/screens/home_screen.dart` — `_setPhoneAlarm()` ~:86-96 builds an
-  `AndroidIntent(action: 'android.intent.action.SET_ALARM', arguments: {HOUR,
-  MINUTES, SKIP_UI: false, MESSAGE: 'Wake Alarm'})` via `android_intent_plus`.
-  The `CircularProgressIndicator` is at ~:189. The only `Duration` in the whole
-  app is `.timeout(const Duration(seconds: 3))` ~:95 — **an intent timeout, not
-  animation. Do not tokenise it.**
-- `phone_app/lib/screens/settings_screen.dart` — 56 lines, `StatelessWidget`,
-  `ListView` ~:21-53, `MaterialPageRoute` ~:30, :49.
-- `phone_app/lib/services/sync_settings.dart` — holds **only** the GitHub token
-  in the keystore (`FlutterSecureStorage`, `_secureTokenKey = 'github_token'`
-  ~:31, `load()` ~:36, `save()` ~:61). There is no general app-preferences class.
-- `phone_app/lib/ui/theme.dart` — local hand-copy, **no `design_system`
-  dependency**. `buildAppTheme()` ~:12, `AppStatusColors` ~:54. ⚠️ Unlike the
-  other apps it does **not** declare `AppSpacing`/`AppRadius`/`AppTextSize`, so a
-  widget copied from diet-guard or workout_app **will not compile here**. Wired at
-  `phone_app/lib/main.dart` ~:18.
-
-## must
-
-**Step 1 — motion + haptics (no new dependency).**
-
-- Add `HapticFeedback.mediumImpact()` when the alarm is successfully set — the
-  single most important action in the app. Fire it on the tap, not after the
-  intent round-trips. `HapticFeedback` is in `package:flutter/services.dart`; add
-  `<uses-permission android:name="android.permission.VIBRATE"/>` to
-  `phone_app/android/app/src/main/AndroidManifest.xml` if absent.
-- Give setting the alarm a **clear confirmation**: which time was set, and that
-  the handoff to the system clock succeeded. Today the user gets a `_status`
-  string and a spinner. Since the actual alarm lives in another app, confirming
-  the handoff is the only reassurance this app can offer — make it unambiguous.
-- Transcribe the motion tokens from prompt 01 into `phone_app/lib/ui/theme.dart`,
-  matching the existing hand-copy convention. Add `AppSpacing`/`AppRadius`/
-  `AppTextSize` **only if** you need them; otherwise leave the file's shape alone.
-- Apply motion tokens to the two `MaterialPageRoute` transitions.
-- Honour `MediaQuery.of(context).disableAnimations`.
-
-**Step 2 — sound (optional here; consider skipping).**
-
-- A UI confirmation cue would need an audio dependency, an `assets:` block, a
-  settings toggle, **and** a preferences class that does not exist yet (see
-  below). For an app whose entire job is to hand off to another app, that is a
-  poor value ratio.
-- **Recommendation: skip sound in this app** and say so explicitly in the session
-  summary. If you do add it, it needs the full opt-out toggle like everywhere
-  else — and the toggle work below.
-- To add any toggle here you must do three things the other apps do not require:
-  (a) convert `SettingsScreen` from `StatelessWidget` to `StatefulWidget`,
-  (b) create a preferences class — there is no `AppSettings` equivalent; model it
-  on `~/src/todo/lib/data/app_settings.dart`, and note `shared_preferences: ^2.3.0`
-  is **already a dependency**, (c) add the `SwitchListTile` to the `ListView`.
-
-**Both steps:**
-
-- must not: **touch anything under `~/src/wake-alarm/wake_alarm/`.** That is the
-  desktop Python daemon that produces the real alarm noise — sine-tone WAVs via
-  `paplay` → `aplay` → `speaker-test` (`_audio.py`, `_play_on_all_sinks` ~:218,
-  pcspkr evdev fallback `_beep_pcspkr` ~:81), escalating 440Hz → 1000Hz → loud in
-  the loop at `_alarm.py` ~:393-407, with sink volume save/restore in `_sinks.py`.
-  **Never route a UI-sound opt-out through any of it.** A toggle that silences a
-  wake-up alarm is a bug that makes someone late for work.
-- The two systems never share a process, package, or file — `phone_app` has no
-  audio engine at all — so a UI sound layer here **structurally cannot** touch
-  alarm playback. Keep it that way; do not build a bridge between them.
-- must not: change the alarm-setting intent, its arguments, or the 3s timeout.
-  Feedback wraps that call; it does not modify it.
-- must not: add a streak, a counter, or any reward for setting an alarm. Waking
-  up is not a metric this app owns, and rewarding "alarms set" rewards the wrong
-  act entirely.
-- must not: copy a widget from another app without checking it only uses symbols
-  this app's thinner theme actually declares.
-
-## done
-
-1. Setting an alarm produces a haptic and an unambiguous confirmation naming the
-   time that was set.
-2. Page transitions use the shared motion tokens; no inline animation `Duration`
-   remains (the 3s intent timeout stays).
-3. `cd ~/src/wake-alarm/phone_app && flutter analyze` is clean.
-4. `cd ~/src/wake-alarm/phone_app && flutter test` passes.
-5. With OS "remove animations" enabled, the app works and durations are zero.
-6. `git diff` shows **no changes under `~/src/wake-alarm/wake_alarm/`**.
-7. The summary states whether sound was added or deliberately skipped.
-
-## verify
-
-**On the phone.**
-
-```
-adb devices                      # confirm 23181JEGR08034
-cd ~/src/wake-alarm/phone_app
-flutter build apk --release
-adb install -r build/app/outputs/flutter-apk/app-release.apk
-```
-
-Never `flutter install`, never `adb uninstall`, never `pm clear` — the app stores
-a GitHub token in the keystore and wiping it means re-authenticating.
-
-Then set a real alarm on the device: confirm the haptic fired (state it as a
-physical observation), the confirmation named the right time, and **the system
-Clock app actually received the alarm**. The last one is the real test — this
-app's job is the handoff, so verify the alarm exists in the Clock app, not just
-that this screen said so.
-
-Do **not** test by letting an alarm actually fire unless kuhy asks — that
-involves the desktop daemon and real noise.
-
-## read first
-
-- `phone_app/lib/screens/home_screen.dart` — `_setPhoneAlarm()` in full,
-  including the timeout and the `_status` string handling.
-- `phone_app/lib/ui/theme.dart` — note what it does **not** declare before
-  writing any widget.
-- `~/src/todo/lib/data/app_settings.dart` — the preferences-class pattern, only if
-  you decide to do step 2.
-- `~/src/utils/unified-design-system/motion.md` — vocabulary from prompt 01.
-  **Prompt 01 must have run first.**
-
-## context you would otherwise rediscover
-
-- **The Flutter app produces no audio whatsoever.** No audio package, no
-  `assets:` block; `assets/` contains only launcher icons. It fires an Android
-  `SET_ALARM` intent and the **system Clock app** rings. The desktop Python
-  daemon is an entirely separate program on a different machine.
-- The repo root (`~/src/wake-alarm/wake_alarm/`, `wake_alarm.egg-info`) is the Python
-  package. Only `phone_app/` is Flutter.
-- This app has **no `design_system` dependency** and the thinnest local theme in
-  the fleet. Adding the dependency is out of scope here (see prompt 07 for what
-  that migration looks like when done properly).
-- No streaks, no charts, no progress, no completion counts exist — and none
-  should be added. This is a two-button utility.
-
-REMOVE ME AFTER FINISH

dopamine-ux/verify_prompts.py

@@ -1,209 +0,0 @@
-#!/usr/bin/env python3
-"""Verify every path and symbol cited in the dopamine-ux prompt files.
-
-A copy-pasteable prompt that points at a file which does not exist is worse than
-no prompt, so this gate adjudicates with an exit code rather than by eye.
-
-Two checks:
-  1. Every cited on-disk path resolves.
-  2. Every cited symbol is greppable in the file it is attributed to. A path
-     check alone cannot catch a stale line number; a symbol grep can.
-"""
-
-from __future__ import annotations
-
-import re
-import sys
-from pathlib import Path
-
-PROMPT_DIR = Path.home() / "src/utils" / "dopamine-ux"
-HOME = Path.home()
-
-PATH_RE = re.compile(r"`(~?/[^`\s]+|[\w.\-]+/[\w./\-]+\.\w+)`")
-
-# Not on-disk paths despite matching the shape above.
-SKIP_SUBSTRINGS = (
-    "://",
-    "$",
-    "*",
-    "<",
-    ">",
-    "…",
-    "devices/",  # Firebase/crdt key path
-    "settings/advanced",  # Firebase key path
-    "android.permission",
-    "android.intent",
-    "/sdcard/",
-    "/etc/",
-    "/dev/input/",
-    "/opt/",
-    "com.kuhy",
-    "app-release.apk",
-    "build/app/outputs",  # build outputs
-    "flutter/services.dart",
-    "flutter/material.dart",  # package imports
-)
-
-# Files a prompt CREATES. Citing them forward is correct, so absence is expected
-# -- but pairing each with its creating prompt still catches a typo.
-CREATED_BY_PROMPT = {
-    "~/src/utils/unified-design-system/motion.md": "01",
-    "~/src/utils/unified-design-system/scripts/structural_check.py": "02",
-}
-
-# Cited precisely to state that they do NOT exist.
-ASSERTED_ABSENT = {
-    "~/gatelock",
-    # Distributed prompt copies are `git rm`d on completion (see the protocol in
-    # 00-INDEX.md), but 00-INDEX.md keeps citing them in its "Distributed copies"
-    # table. Asserting ABSENT rather than dropping the row keeps the check
-    # two-directional: a finished prompt reappearing in a repo is itself a
-    # failure, because the next session would re-run it. Move a row here as each
-    # prompt completes.
-    "~/src/utils/prompts/dopamine-ux-01-motion-tokens.md",
-}
-
-# Generic prose fragments rather than citations of one specific file.
-PROSE_FRAGMENTS = {"lib/ui/theme.dart", "lib/main.dart", "pubspec.yaml"}
-
-# Symbols each prompt claims exist, as (repo-relative file, symbol).
-SYMBOL_CLAIMS = [
-    ("~/src/diet-guard/app/lib/screens/log_meal_screen.dart", "_onLogMeal"),
-    ("~/src/diet-guard/app/lib/widgets/today_progress_card.dart", "TodayProgressCard"),
-    ("~/src/diet-guard/app/lib/widgets/streak_summary_row.dart", "StreakSummaryRow"),
-    ("~/src/diet-guard/app/lib/screens/log_meal_progress.dart", "buildTodayProgress"),
-    ("~/src/diet-guard/app/lib/services/app_settings_service.dart", "_writeToDisk"),
-    ("~/src/screen-locker/screen_locker/_status_types.py", "StatusSnapshot"),
-    ("~/src/screen-locker/screen_locker/_extra_benefits.py", "process_week_transition"),
-    ("~/src/screen-locker/screen_locker/_extra_benefits.py", "current_streak"),
-    ("~/src/screen-locker/screen_locker/_unlock_view.py", "unlock_screen"),
-    ("~/src/screen-locker/screen_locker/_log_mixin.py", "write_signed_entry"),
-    ("~/src/screen-locker/screen_locker/tests/conftest.py", "_ISOLATED_STATE"),
-    ("~/src/screen-locker/screen_locker/_weekly_check.py", "WEEKLY_WORKOUT_MINIMUM"),
-    (
-        "~/src/screen-locker/stronglift_replacement/workout_app/lib/screens/"
-        "workout_screen_session.dart",
-        "_playBreakEndCue",
-    ),
-    (
-        "~/src/screen-locker/stronglift_replacement/workout_app/lib/screens/"
-        "workout_screen_finish.dart",
-        "_persistFinishedWorkout",
-    ),
-    (
-        "~/src/screen-locker/stronglift_replacement/workout_app/lib/widgets/"
-        "workout_summary_dialog.dart",
-        "WorkoutSummaryDialog",
-    ),
-    (
-        "~/src/screen-locker/stronglift_replacement/workout_app/lib/services/"
-        "storage_service.dart",
-        "_getSetting",
-    ),
-    (
-        "~/src/screen-locker/stronglift_replacement/workout_app/lib/widgets/"
-        "exercise_tile_rows.dart",
-        "AnimatedContainer",
-    ),
-    ("~/src/todo/lib/data/app_settings.dart", "withAdvancedMode"),
-    ("~/src/todo/lib/ui/settings_screen.dart", "SwitchListTile"),
-    ("~/src/dufs-cloud/web/src/hooks/use-cloud-index.ts", "walkInto"),
-    ("~/src/dufs-cloud/app/lib/services/cloud_index.dart", "buildCloudIndex"),
-    ("~/src/dufs-cloud/web/src/lib/download.ts", "buildSelectionZip"),
-    ("~/src/dufs-cloud/app/lib/services/download_zip.dart", "buildSelectionZip"),
-    ("~/src/wake-alarm/phone_app/lib/screens/home_screen.dart", "_setPhoneAlarm"),
-    ("~/src/wake-alarm/wake_alarm/_audio.py", "_play_on_all_sinks"),
-    ("~/src/utils/unified-design-system/scripts/palette_check.py", "NON_COLOUR_CSS"),
-    ("~/src/utils/unified-design-system/scripts/palette_map.py", "PALETTE"),
-    ("~/src/utils/design_system/lib/src/feedback.dart", "showToast"),
-    ("~/src/utils/design_system/lib/src/tokens.dart", "AppSpacing"),
-    ("~/src/utils/gatelock/gatelock/_window.py", "LockConfig"),
-]
-
-
-def expand(raw: str) -> Path:
-    return HOME / raw[2:] if raw.startswith("~/") else Path(raw)
-
-
-def candidate_paths(text: str) -> set[str]:
-    return {
-        raw
-        for raw in PATH_RE.findall(text)
-        if not any(s in raw for s in SKIP_SUBSTRINGS)
-        and raw not in PROSE_FRAGMENTS
-        and not re.search(r"\.\w+:\d+$", raw)  # trailing :line suffix
-    }
-
-
-def prompt_roots(text: str) -> list[Path]:
-    roots = []
-    for label in ("Repo", "App", "Flutter app"):
-        for m in re.finditer(rf"{label}: `(~/[^`]+)`", text):
-            roots.append(expand(m.group(1)))
-    return roots
-
-
-def check_paths() -> list[str]:
-    failures = []
-    checked = 0
-    for prompt in sorted(PROMPT_DIR.glob("*.md")):
-        text = prompt.read_text()
-        roots = prompt_roots(text)
-        for raw in sorted(candidate_paths(text)):
-            if raw in ASSERTED_ABSENT:
-                if expand(raw).exists():
-                    failures.append(
-                        f"{prompt.name}: `{raw}` is asserted ABSENT but EXISTS"
-                    )
-                continue
-            if raw in CREATED_BY_PROMPT:
-                owner = CREATED_BY_PROMPT[raw]
-                cites_owner = re.search(rf"[Pp]rompt {owner}", text) is not None
-                if not prompt.name.startswith(owner) and not cites_owner:
-                    failures.append(
-                        f"{prompt.name}: cites `{raw}` without noting prompt "
-                        f"{owner} creates it"
-                    )
-                continue
-
-            checked += 1
-            if raw.startswith(("~/", "/")):
-                if not expand(raw).exists():
-                    failures.append(f"{prompt.name}: `{raw}` MISSING")
-            elif not any((r / raw).exists() for r in roots):
-                failures.append(
-                    f"{prompt.name}: `{raw}` not found under any of "
-                    f"{[str(r) for r in roots]}"
-                )
-    print(f"paths: checked {checked}")
-    return failures
-
-
-def check_symbols() -> list[str]:
-    failures = []
-    for raw_file, symbol in SYMBOL_CLAIMS:
-        path = expand(raw_file)
-        if not path.exists():
-            failures.append(f"symbol source MISSING: {raw_file}")
-            continue
-        if symbol not in path.read_text(errors="replace"):
-            failures.append(f"symbol `{symbol}` NOT FOUND in {raw_file}")
-    print(f"symbols: checked {len(SYMBOL_CLAIMS)}")
-    return failures
-
-
-def main() -> int:
-    n_prompts = len(list(PROMPT_DIR.glob("*.md")))
-    print(f"verifying {n_prompts} prompt files in {PROMPT_DIR}")
-    failures = check_paths() + check_symbols()
-    if failures:
-        print(f"\nFAIL -- {len(failures)} problem(s):")
-        for f in failures:
-            print(f"  {f}")
-        return 1
-    print("\nPASS -- every cited path exists and every cited symbol is present")
-    return 0
-
-
-if __name__ == "__main__":
-    sys.exit(main())

earned_time/README.md

@@ -168,17 +168,14 @@ How far to trust a gate is computed from its ledger, never listed by name:
 - `done_today(earner, ledger, key_file, *, now=None) -> bool | None`
 - `first_credit_at(earner, ledger, key_file, day) -> float | None` — unix time
   of the earliest verified credit for `day`, on its matcher's stamp
-  (`_match.CREDIT_STAMPS`; Anki/Automation: `created_at`). It can lie outside
-  `day` (Anki's rollover, a rest day declared the evening before).
-- `credit_units(earner, ledger, key_file, day) -> int | None` — the units
-  the verified rows pay for `day`: 1 per row (the workout), or the row's own
-  count (the tutor's `detail.minutes`, legacy block rows 15; from 0.10.0 the
-  day's sum scaled to its weekday quota). A repeated `entry_id` pays once,
-  its smallest count; `max_units` is applied by `resolve`.
+  (`_match.CREDIT_STAMPS`; else `created_at`); it can lie outside `day`.
+- `credit_units(earner, ledger, key_file, day) -> int | None` — the units the
+  verified rows pay for `day`: 1 per row (the workout), or the row's own count
+  (`detail.minutes`: tutor, legacy blocks 15, from 0.10.0 scaled to its weekday
+  quota; focus). A repeated `entry_id` pays once; `resolve` applies `max_units`.
 - `earners_for(day)`, `all_earners()`, `registries()` — the registry in force
   on a day, and every earner of every registry (what a ledger watcher must
-  watch). They read `earned_time.EARNERS` through the package, so a consumer
-  test that patches it still registers its stand-in.
+  watch). They read `earned_time.EARNERS` through the package, so a patch holds.
 - `shutdown_minutes_for(earner, day)`, `extra_shutdown_minutes_for(earner, day)`,
   `shutdown_ceiling_for(day)` (ints), `on_ladder(day) -> bool` — what a status
   view lists as still left to earn. `Earner.shutdown_for(units, day=None)` is
@@ -187,14 +184,22 @@ How far to trust a gate is computed from its ledger, never listed by name:
 
 ## The workout ledger
 
-`WORKOUT` is `kind="counted"` with a ledger at
-`~/.local/share/workout_locker/ledger.json`, written by screen-locker: one
-signed credit row per credited unit,
-`{"kind": "credit", "entry_id", "day", "detail": {"completed_at", "source"}}`.
-`workout_match` counts a `runnerup_tcx` row when `completed_at` falls in the
-window, and a `rest_day` row on the `day` it names — only if
-`detail.declared_at` is before that day's local midnight. A rest day declared
-on the day itself is logged and does not count.
+`WORKOUT` is `kind="counted"`, ledger `~/.local/share/workout_locker/ledger.json`
+(screen-locker; one signed credit row per unit, `detail.completed_at`/`source`).
+`workout_match` counts a `runnerup_tcx` row by `completed_at`, a `rest_day` row
+on its `day` only if `detail.declared_at` predates that day (else logged, no).
+
+## The focus project (0.19.0, cut 180 since 0.20.0, pays 240 since 0.21.0)
+
+While `focus_project.active(day)` returns a project, `earners_for` drops the
+gates it `replaces` (`book` = `reading`) and adds one counted `focus` earner
+(`max_units` = the day's `daily_on`). Shutdown pays their rungs (180/120 min); gaming
+their `max_gaming_minutes` + pure bonuses again (240/120 min = 2/min; full day = 8 h):
+`floor(summed minutes * pay / daily_minutes)`, never per row. The penalty runs
+from the start day, cutting all of it, 180 with LeetCode's formerly free hour (0.20.0); maturity never delays it. Ledger `~/.local/share/focus_project/ledger.json`:
+signed `credit` rows, `entry_id` `<project>-<YYYYMMDD>-m<n>`, `detail.minutes` (positive int),
+`detail.ended_at` (else `day`). `focus_project` unusable = no project (logged).
+Unbacked timer time pays 0 from 2026-11-08 (focus_project 0.10.0).
 
 ## Adding a gate
 
@@ -208,43 +213,39 @@ on the day itself is logged and does not count.
    ```python
    PIANO = Earner(
        name="piano",                    # also screen-locker's "piano_bonus_date" stamp
-       label="piano",
        gaming_minutes=30,
        shutdown_minutes=30,             # pre-ladder value
        penalty_from=date(2026, 11, 1),  # gaming base drops by 30 from then on
        ledger=".local/share/piano_guard/ledger.json",
        match=piano_match,               # which verified credit rows count today
-       missing_ledger_is_no=True,
    )
    ```
 
-   Then give it a rung in `TUTOR_LADDER` (`PIANO.name: Rung(20)`), and, if its
-   matcher decides on an event stamp, an entry in `_match.CREDIT_STAMPS`.
+   Then a rung in `TUTOR_LADDER` (`PIANO.name: Rung(20)`) and, for an event
+   stamp, an entry in `_match.CREDIT_STAMPS`.
 
-   On the ladder a new earner's rung comes out of the floor from its penalty
-   start (a pure bonus: the day its pin lands; the ceiling is fixed): re-split
-   the rungs and ship it the day the gate can actually be satisfied.
-3. Bump the version, tag `earned-time-vX.Y.Z`, and bump the pin in both
-   consumers. Neither needs code for a ledger-backed flat earner.
+   A new rung comes out of the floor from its penalty start (a pure bonus:
+   the day its pin lands): ship it the day the gate can be satisfied.
+3. Bump, tag `earned-time-vX.Y.Z`, re-pin every consumer (no code needed).
 
 ## Rules the consumers rely on
 
 - **Minutes everywhere.** Shutdown is minutes after local midnight.
-- **Paths are passed in.** No reader resolves a real path itself, except the
-  switch file: consumer tests patch `earned_time._leisure.LEISURE_FROM_PATH`.
+- **Paths are passed in.** Only the switch file is resolved here
+  (patch `earned_time._leisure.LEISURE_FROM_PATH`).
 - **`None` is "could not check", never "no".** It earns nothing (fail closed),
   but consumers log it. A missing answer in `resolve()` is logged as well; an
   unknown earner name raises.
-- **The HMAC key is root-owned and 0644 on purpose.** User-run gates must sign
-  rows, so the user reads it; root owns it so no user process can replace it.
-  It stops casual edits and corruption, not a determined forger with a shell.
-- **Stdlib only.** The gaming daemon imports this as root, headless.
+- **The HMAC key is root 0644 on purpose.** User-run gates sign rows with it;
+  it stops casual edits, not a determined forger with a shell.
+- **Stdlib only.** The root gaming daemon imports this headless; `focus_project`
+  (stdlib too) is imported lazily and may be absent.
 
 ## Install
 
 ```console
-pip install --user --break-system-packages --no-deps "earned-time @ git+https://github.com/kuhyx/utils@earned-time-v0.18.0#subdirectory=earned_time"
+pip install --user --break-system-packages --no-deps "earned-time @ git+https://github.com/kuhyx/utils@earned-time-v0.20.0#subdirectory=earned_time"
 ```
 
-The root `steam-backlog-enforcer.service` sets `HOME=/home/kuhy`, so it imports
-from the same user site-packages. Test: `scripts/run_subproject_tests.sh earned_time`.
+The root `steam-backlog-enforcer.service` sets `HOME=/home/kuhy` and imports from
+the same user site-packages. Test: `scripts/run_subproject_tests.sh earned_time`.

earned_time/earned_time/__init__.py

@@ -43,6 +43,7 @@ from earned_time._credits import (
     first_credit_at,
 )
 from earned_time._evidence import real_credit
+from earned_time._focus import FOCUS_LEDGER, FocusEarner
 from earned_time._ladder import (
     ANKI_WAIVED_FROM,
     LADDER,
@@ -105,6 +106,7 @@ __all__ = [
     "ANKI_WAIVED_FROM",
     "AUTOMATION",
     "EARNERS",
+    "FOCUS_LEDGER",
     "GAMING_BASE_MINUTES",
     "GAMING_CEILING_MINUTES",
     "LADDER",
@@ -132,6 +134,7 @@ __all__ = [
     "WORKOUT",
     "Base",
     "Earner",
+    "FocusEarner",
     "Level",
     "Maturity",
     "Resolution",

earned_time/earned_time/_cli.py

@@ -20,6 +20,7 @@ from pathlib import Path
 import sys
 from typing import TYPE_CHECKING, Final
 
+from earned_time._focus import FOCUS_WATCH
 from earned_time._maturity import Maturity, maturity
 from earned_time._registry import all_earners, earners_for
 
@@ -57,9 +58,14 @@ def _gates(day: date) -> list[tuple[str, Earner, Maturity]]:
     and after ``TUTOR_FROM`` until 0.9.0); those get their ledger's directory
     appended.
     """
-    earners = [e for e in all_earners() if e.ledger is not None]
-    names = Counter(e.name for e in earners)
     registered = earners_for(day)
+    earners = [
+        e
+        for e in (*all_earners(), *registered)
+        if e.ledger is not None and e is not FOCUS_WATCH
+    ]
+    earners = list(dict.fromkeys(earners))
+    names = Counter(e.name for e in earners)
     gates = []
     for item in earners:
         ledger = Path(str(item.ledger))

earned_time/earned_time/_focus.py

@@ -0,0 +1,121 @@
+# Copyright (c) 2026 Krzysztof Rudnicki
+"""The focus project (0.19.0): replaced gates stand down, one earner pays."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from datetime import date, timedelta
+import importlib
+import logging
+from typing import Any, Final
+
+from earned_time._ladder import shutdown_units_minutes
+from earned_time._match import focus_match
+from earned_time._policy import Earner
+
+__all__ = [
+    "FOCUS_LEDGER",
+    "FOCUS_WATCH",
+    "FocusEarner",
+    "focus_earner",
+    "with_focus",
+]
+
+FOCUS_LEDGER: Final = ".local/share/focus_project/ledger.json"
+_SYNONYMS: Final = {"book": "reading"}
+_logger: Final = logging.getLogger(__name__)
+_warned: set[str] = set()
+
+
+@dataclass(frozen=True)
+class FocusEarner(Earner):
+    """Counted; ``gaming_minutes``/``shutdown_minutes`` pay a FULL day.
+
+    ``cut_gaming_minutes``: the gaming base cut, all the replaced gates paid,
+    LeetCode's free hour too (0.20.0). The full-day gaming pay adds that free
+    hour once more, so a full day matches the old one (kuhy 2026-11-02, 0.21.0).
+    """
+
+    cut_gaming_minutes: int = 0
+
+    def gaming_for(self, units: int) -> int:
+        """Gaming minutes of ``units`` focused minutes, floored."""
+        return self.capped(units) * self.gaming_minutes // (self.max_units or 1)
+
+    def shutdown_for(
+        self,
+        units: int,
+        day: date | None = None,  # noqa: ARG002
+    ) -> int:
+        """Shutdown minutes of ``units`` focused minutes, floored."""
+        return self.capped(units) * self.shutdown_minutes // (self.max_units or 1)
+
+
+def _active(day: date) -> Any:  # noqa: ANN401
+    """The active project on ``day``; ``None`` for none or on any failure."""
+    try:
+        return importlib.import_module("focus_project").active(day)
+    except Exception as exc:  # noqa: BLE001  # pylint: disable=broad-exception-caught
+        message = f"focus_project unusable ({type(exc).__name__}: {exc})"
+        if message not in _warned:
+            _warned.add(message)
+            _logger.warning("%s; behaving as if no project is active", message)
+        return None
+
+
+def daily_on(project: Any, day: date) -> int:  # noqa: ANN401
+    """``day``'s target: ``project.daily_on(day)`` (a later edit never re-prices it)."""
+    pick = getattr(project, "daily_on", None)
+    return int(pick(day) if pick is not None else project.daily_minutes)
+
+
+def focus_earner(project: Any, dropped: tuple[Earner, ...], day: date) -> Earner:  # noqa: ANN401
+    """The ``focus`` earner paying what ``dropped`` paid, over ``project``.
+
+    Gaming: the cut is every dropped gate's full pay; a full day pays that plus
+    the pure bonuses (no ``penalty_from``) again: 180 + 60 = 240 at 120 min.
+    """
+    cut = sum(e.max_gaming_minutes for e in dropped)
+    free = tuple(e for e in dropped if e.penalty_from is None)
+    return FocusEarner(
+        name="focus",
+        label="Focus",
+        gaming_minutes=cut + sum(e.max_gaming_minutes for e in free),
+        cut_gaming_minutes=cut,
+        shutdown_minutes=sum(
+            shutdown_units_minutes(e, e.max_units or 1, day) for e in dropped
+        ),
+        kind="counted",
+        max_units=daily_on(project, day),
+        penalty_from=project.start,
+        confirmed_on=project.start - timedelta(days=1),
+        ledger=FOCUS_LEDGER,
+        match=focus_match,
+        missing_ledger_is_no=True,
+    )
+
+
+FOCUS_WATCH: Final = FocusEarner(
+    name="focus",
+    label="Focus",
+    gaming_minutes=0,
+    shutdown_minutes=0,
+    kind="counted",
+    max_units=1,
+    ledger=FOCUS_LEDGER,
+    match=focus_match,
+    missing_ledger_is_no=True,
+)
+
+
+def with_focus(registry: tuple[Earner, ...], day: date) -> tuple[Earner, ...]:
+    """``registry`` reshaped by the active project; unchanged if none."""
+    project = _active(day)
+    if project is None:
+        return registry
+    gates = {_SYNONYMS.get(g, g) for g in project.replaces}
+    dropped = tuple(e for e in registry if e.name in gates)
+    if not dropped or daily_on(project, day) < 1:
+        return registry
+    kept = tuple(e for e in registry if e not in dropped)
+    return (*kept, focus_earner(project, dropped, day))