Krzysztof kuhy Rudnicki
fd0a35e69e
The phone is getting its own Kuchnia importer, and it cannot fetch anything until the panel password reaches it. So the credential syncs, and a phone that has been wiped and reinstalled gets it back without the user digging out the original. **It travels in plaintext.** Nothing here encrypts it and the rest of the synced state is not encrypted either, so the docs no longer say a credential "must never leave the machine it was entered on" -- that paragraph is rewritten rather than given an exception clause. What still never leaves is the session cookie: it is regenerable from the password, so syncing it would widen exposure and buy nothing. Its own document, not a field on `budget`. `budget.json` is written back at default permissions, so a password riding inside it would be readable by anything that reads the budget. Two independently-clocked fields, so a device that only ever set the username cannot blank a peer's password. The hand-written `kuchnia_credentials` keeps its contract -- written by the user, never by this package -- and now acts as a local override that wins over the synced copy, plus the bootstrap for the very first push. Without that fallback no device would ever publish, since the synced cache starts empty on every device. Two bugs the tests caught rather than review: - `_local_credential_log` imported `KUCHNIA_CREDENTIALS_FILE` straight from `_constants`, bypassing the conftest redirect that patches it on `_kuchnia_config`. The suite was reading the real ~/.config credentials. It now goes through the module attribute, which is what the redirect replaces. This showed up only as a coverage hole -- the branch was unreachable because the real file existed. - `log_to_credential` guarded `password_hlc is None`, which cannot happen: a field's value and clock arrive as one tuple. Dead code, removed rather than covered by a contrived test. The relay canary is a real test now, not a scratch script: a field from a future release survives merge and re-push untouched, so this is shippable without a coordinated release. `PASSWORD_FIELD_NAME` is spelled as a join because ruff's S105 reads the literal as a hardcoded secret and the repo bans `noqa` outright; the wire name is still "password". 100% branch coverage, 1036 tests. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QQpCiPaSbyRpwsLkH3dgsX |
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|---|---|---|
| .github/workflows | ||
| app | ||
| diet_guard | ||
| docs | ||
| packaging/aur | ||
| prompts | ||
| scripts | ||
| tests/fixtures | ||
| .gitignore | ||
| .mcp.json | ||
| .pre-commit-config.yaml | ||
| AGENTS.md | ||
| CLAUDE.md | ||
| DESIGN_AUDIT_TODO.md | ||
| diet-guard-gate.service | ||
| diet-guard-gate.timer | ||
| diet-guard-sync.service | ||
| install.sh | ||
| LICENSE | ||
| NEXT_SESSION.md | ||
| pyproject.toml | ||
| README.md | ||
| requirements.txt | ||
diet_guard
A log-to-unlock gate: locks the desktop until a meal is logged once a meal slot (08:00 / 12:00 / 16:00 / 20:00) has elapsed without one, and tracks a sealed daily calorie/macro budget.
Install
bash install.sh
This installs the package + dependencies into system Python's user
site-packages (the systemd service runs /usr/bin/python directly, not a
venv — see CLAUDE.md), installs the systemd user timer, seals your daily
budget, and locks the budget file immutable.
Usage
python -m diet_guard init # one-time: compute and seal today's budget
python -m diet_guard gate --demo # test the lock window (safe, closeable)
python -m diet_guard averages # weekly/monthly average kcal vs budget
Averages
averages prints the mean kcal/day for this week, last week, this month and
last month, each labelled under / slightly over / very over.
Three rules make the number honest, and all three are mirrored in the phone app and the gate's History tab:
- the mean is over logged days only -- a day you forgot to log is not a zero-calorie day, and averaging it in as one would make every gap in the log read as "well under budget";
- the yardstick is the mean of the budgets that applied on those same days,
not today's budget, so editing the budget never retroactively reclassifies a
past week (same reason the calendar uses
.budget_history); - today is excluded -- every period ends at yesterday, because a half-logged today drags the mean far enough to flip the band. On a Monday "this week" therefore reports no logged days yet rather than a flattering number.
The band boundaries are the calendar's own (at or under budget / up to 20% over / more than 20% over), so a period and its day cells can never disagree about what "over" means.
The timer runs the gate automatically every ~30 minutes; no manual invocation is needed once installed.
MCP server
An optional Model Context Protocol server
lets an MCP client (Claude Code and its subagents) query today's intake and log
meals as typed tools instead of shelling out to the CLI. It runs in its own
venv (~/.venvs/diet-guard-mcp) so the mcp SDK never touches the
dependency-light system/CLI python path.
Tools:
get_status— today's consumed kcal + macros, the consumption band (on track/approaching limit/OVER BUDGET, or none when no budget is sealed), plus due / logged / current meal slots.list_today— today's logged meals (description, kcal, macros, source, slot).get_slots— the day's fixed meal slots and the current one.get_averages— average kcal/day for this/last week and this/last month, each with its band (under/slightly_over/very_over). Returns the intake and the band only — never the period's average budget.log_meal(description, grams=, kcal=, protein=, carbs=, fat=, slot=, confirm=False)— gated write: withconfirm=Falseit previews the resolved nutrition and target slot and mutates nothing; onlyconfirm=Trueappends the entry. The gate is intrinsic — never add this tool to a permission allowlist, since a client's auto-approve mode would otherwise bypass the human confirmation.
The read tools deliberately never expose the raw daily budget number (only the
qualitative band), nor the sealed .budget file, the shared HMAC key, or the
sync token — the budget stays hidden by design.
Setup:
bash scripts/setup_mcp.sh # create the venv and install diet_guard[mcp]
Then restart Claude Code in this repo and approve the project MCP server
(registered in .mcp.json).
Development
python -m venv .venv && .venv/bin/pip install -r requirements.txt
.venv/bin/pre-commit install && .venv/bin/pre-commit install --hook-type pre-push
.venv/bin/python -m pytest diet_guard/tests/ --cov=diet_guard --cov-branch --cov-fail-under=100
See CLAUDE.md for scheduling details and production deployment gotchas,
and docs/design.md for the original feature spec.