MealGate now composes gatelock.GateRoot + gatelock.LockWindow instead of
inheriting the deleted _GateWindow/_GateRoot, and its HMAC signing goes
through gatelock.log_integrity. This is the first of three migrations
(diet_guard -> screen-locker -> wake_alarm) extracting the lock-window
mechanics that diet_guard's own _GateWindow proved out into a shared,
reusable package. Window-mechanics tests moved with the code; diet_guard's
suite now only tests its own wiring (LockConfig choice, hook delegation).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XCdT46zV8hESDvbgYMGDLt
Add the diet_guard package: a screen-locking meal-logging gate that fires
on 4-hour slots (08/12/16/20) and records calories/macros, persisting an
autocompleting food bank.
- Trigger fix: the systemd timer fires at session start (Persistent=true)
before lightdm has written ~/.Xauthority, so the gate crashed with a
TclError instead of locking the screen. Add wait_for_display() /
_display_is_ready() in _gatelock.py and wire it into _cli._cmd_gate so the
gate retries on the next tick instead of crashing; add
Environment=XAUTHORITY=%h/.Xauthority to the service as belt-and-suspenders.
- Food-bank hardening: a transiently corrupt food_bank.json was warned about
on every keystroke and then silently overwritten (data loss). _read_bank
now quarantines it via _quarantine_corrupt_bank() (warn-once + timestamped
backup) before starting fresh.
- Multi-item meals: new _meal.py (MealItem, meal_total, MEAL_SOURCE),
remember_meal() + _upsert() in _foodbank.py, and a "+ Add item" control in
the gate that logs both the individual items and the composite meal.
- Bundle resolve_nutrition's manual macros into a ManualMacros dataclass to
stay within the argument-count limit.
diet_guard at 100% branch coverage; full pre-commit suite passes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
