Complete tasks 3-7: harden verdict parsing, outputs retention, base branch, linux schedule parity, claim loop task

tasks/complete/linux-schedule-parity/IMPLEMENTATION.md

@@ -0,0 +1,33 @@
+# Implementation: linux-schedule-parity
+
+## What was implemented
+
+### `_install_cron_block(name, project, interval_seconds)` — new
+
+Inserts a cron block (`# automaton-loop:<name>` / `# end automaton-loop:<name>`) into the user's crontab via `crontab -`. Returns 0 on success, 2 on write error. Interval is rounded to full minutes (minimum 1). Strips any prior block for the same loop before inserting (idempotent).
+
+### `_enable_schedule(name, project)` — new
+
+Inverse of `_disable_schedule`. Platform dispatch:
+- **Linux**: calls `_install_cron_block` (re-inserts cron entry after resume)
+- **Darwin**: renames `com.automaton.loop.{name}.plist.disabled` → `com.automaton.loop.{name}.plist`
+- **Windows**: no-op (no OS schedule support in v1)
+
+Reads `loop.json` → `schedule.interval_seconds` for the interval; falls back to 3600s (config default). Non-int values return fallback without crashing.
+
+### `_disable_schedule(name, project)` — already existed
+
+Verified and refined. Strips the `# automaton-loop:<name>` block from crontab. Platform dispatch: Linux (crontab), Darwin (rename .plist → .plist.disabled), Windows (no-op).
+
+## Files changed
+
+- `scripts/status.py` — added `_install_cron_block`, `_enable_schedule` (lines ~1850-1890)
+
+## Tests
+
+13 tests in `tests/test_linux_schedule_parity.py` covering:
+- Fresh cron block writes, prior block stripping, write error handling
+- Interval rounding and minimum clamping
+- Enable schedule: stub exists/absent, interval from cfg, garbage interval fallback, idempotent calls
+- Darwin/Windows dispatch branches
+- Disable schedule: block extraction correctness