[razbahri]

Summary

Changes the sync window from rolling-relative-to-now to day-aligned in the user's local timezone. Same window_past_days / window_future_days config; new semantics inside the daemon.

Why

Old behavior in cli.py:69-70:

start = now - timedelta(days=window_past_days)
end   = now + timedelta(days=window_future_days)

So a sync at 14:23 saw [yesterday 14:23, +30d 14:23]. Two real bugs:

1. Boundary churn: events near the past edge slid out of the window throughout the day. The daemon deleted them from Google. User saw events vanish for no apparent reason.
2. CREATE/DELETE flapping: a noon sync saw event X, a 3pm sync didn't, the next sync re-created it. Especially bad for all-day events whose start time was close to the rolling boundary.

What changed

New helper _compute_sync_window(now, past_days, future_days, tz) returns

[midnight(today − past_days) local, midnight(today + future_days + 1) local)

as UTC-aware datetimes. Exclusive end (idiomatic Python). Window is invariant within a local calendar day — every sync of the same day evaluates the same boundaries.

The sync.start log line now prints the window in local time and uses ) for the exclusive end, e.g.:

2026-05-09T11:23:00Z INFO  ogmac.cli sync.start window=[2026-05-08..2026-06-09)

Tests

5 new tests in tests/unit/test_sync_window.py:

• test_window_aligns_to_local_midnight
• test_window_invariant_within_a_local_day
• test_window_zero_days_is_one_day
• test_window_returns_utc_datetimes
• test_window_end_is_exclusive

Use a fixed IDT (UTC+3) timezone so they don't depend on the runner's TZ. 177 tests pass (was 172).

Migration

Behavioral, not schematic. First sync after upgrade may:

• CREATE events newly in scope
• DELETE events newly out of scope

After that, the window is stable. No state.db migration, no config schema change.

Test plan

• pytest tests/ → 177 passed
• ogmac sync → check ~/Library/Logs/ogmac/sync.log: sync.start window=[YYYY-MM-DD..YYYY-MM-DD) shows day-aligned local dates
• Run two syncs at different times of the same day and verify the same reconcile create=… counts
• Run on a Mac with non-UTC local timezone and confirm the window flips at local midnight, not UTC midnight

🤖 Generated with Claude Code