Record.toJson() was writing the delete-clock field as deletedHlc while
the Python package's Record.to_dict() writes deleted_hlc -- an
undetected cross-language wire divergence: a tombstoned record synced
Python<->Dart would silently lose its delete clock on the receiving
side. Also widen syncLog's decode error handling from FormatException
alone to also catch TypeError, matching the Python side's
(ValueError, KeyError, TypeError) so a valid-JSON-but-wrong-shape push
from an incompatible writer is skipped per-device instead of aborting
the whole sync. Adds a fixture test shared verbatim with the Python
package's test suite so this class of divergence fails loudly going
forward.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017McuA1nAi6jBT1EaS5BrVf
The Python and Dart test suites each only verified round-tripping through
their own encoder/decoder, so a Record.to_dict()/toJson() key mismatch
between the two (deleted_hlc vs deletedHlc) would have gone undetected
despite being the exact thing this shared library exists to prevent. Pin
one canonical fixture in both suites so a future divergence fails loudly
on at least one side. Also add a test for a valid-JSON-but-wrong-shape
remote push, exercising the full (ValueError, KeyError, TypeError) skip
path, not just JSON syntax errors.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017McuA1nAi6jBT1EaS5BrVf
Pure-Dart mirror of the Python crdt-sync package, module-for-module and
test-for-test, so the merge algorithm canonically agrees on both sides of
a sync between a Dart client and a Python one. No Flutter SDK dependency
(package:http only) per Workstream D's scoping decision (2026-07-04).
59 tests, clean dart analyze.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017McuA1nAi6jBT1EaS5BrVf
Extracted and generalized from diet_guard's existing tombstone-merge scheme
and GitHub Contents API client, extended with per-field HLC LWW so the same
library can also cover todo's mutable notes and wake_alarm's single-value
sync (Workstream D scoping decision, 2026-07-04). 100% branch coverage,
clean ruff/mypy/pylint/bandit.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017McuA1nAi6jBT1EaS5BrVf
Extracts the chattr+bind-mount+systemd-watcher file-locking pattern (and a
new pacman PreTransaction package-block primitive) out of screen-locker and
steam-backlog-enforcer into a standalone, config-driven library so both
projects (and steam-backlog-enforcer's new block-gaming feature) can share
one implementation instead of maintaining parallel copies.
- guardctl: CLI entry point (file-guard, package-block subcommands)
- lib/file_guard.sh: chattr +i / bind-mount / systemd-path-watcher / pacman
hook enforcement for a single target file, keyed by /etc/guard-lib/targets
config; includes `sync` (adopt current content as canonical - for a
caller's own legitimate edit) distinct from `pacman-relock` (revert drift)
- lib/package_block.sh: time-locked pacman PreTransaction hook that refuses
to (re)install a given package while a lock file's `until` timestamp is in
the future; supports --bind-mount to compose with file-guard on the same
lock file
- pacman-hooks/: the installed hook scripts + .hook definitions
- systemd/: guard-file@.path/.service watcher units, guard-bind-mount@.service
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AFNiYQQgSLAkiBXswyimPq
Extracted from wake_alarm, screen-locker, and diet_guard, which each
independently implemented fullscreen-lock, input-grab, VT-disable, and
HMAC-signed-state mechanics at different levels of maturity (the HMAC
module was already a hand-copied duplicate between two of them).
LockConfig exposes overrideredirect/grab/disable_vt as independent
axes so one LockWindow can reproduce all three projects' exact prior
behavior, plus screen-locker's confirmed upgrade to retry-forever grab.
