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Krzysztof kuhy Rudnicki
82e206116a
The enforcer failed in both directions: nothing blocked at home, and everything blocked at the office. The comparison was never inverted -- `metres <= threshold` was always right. Three separate causes: Only ACCESS_COARSE_LOCATION was declared. Android 12+ fuzzes coarse to a ~1-2 km grid against a 150 m fence, so a fix taken at home routinely landed outside it, read as AWAY, and restored every app the geofence exists to hide. FINE is now declared and self-granted by the device owner, along with coarse and background, re-asserted every pass so a reinstall cannot silently drop it. There were three states but two behaviours. LOCATION_UNKNOWN applies the identical sweep to AT_HOME -- correct fail-closed design, indistinguishable from outside. And nothing ever requested a fix: the pass read whatever another app happened to cache, so at the office with no navigation running the cache was empty. Passes now acquire a fix inside a location-typed foreground service, bounded at 20 s, and treat anything older than 30 min as no fix. That window is deliberately longer than the 15-minute cadence; a shorter one marks the newest cache stale on every pass of an idle phone and blocks everything. None of it was diagnosable. `adb logcat -d -s FocusOwner:V` came back empty while dumpsys showed 82 alarms had fired, and `run-as` is refused on the release build device owner requires. So the pass now writes a ring-buffered JSONL record read back in-app: reason, distance vs the fence, fix age/provider/accuracy, curfew state, and every hidden app with the rule that hid it. Coordinates are never recorded -- a distance is enough to debug a geofence, and this is a home address. Also fixed along the way: - Hysteresis keyed off `isEnforcing`, which is true under AWAY too because YouTube stays hidden, so the threshold was permanently radius+hysteresis. It now keys off whether the previous pass was inside the fence. - The scheduler's curfew-boundary alarms were documented but never scheduled; both callers invoked `scheduleNext()` bare, so 05:00 could land 15 min late. - Installing over the app cancelled its pending alarms, so `adb install -r` silently stopped enforcement until someone opened the app. MY_PACKAGE_REPLACED now re-arms it, verified on device without launching the app. - A wrong-typed log record threw instead of being skipped, and the exception escaped far enough to leave the page stuck busy -- which disables the release-device-owner button, the one control that must work when everything else has gone wrong. - `lib/enforcement.dart` was a second decision layer with no always-blocked concept, cited by KDoc as pinned by a `PolicyParityTest` that never existed. It would have made the new screen report YouTube visible while it is hidden. Deleted; the UI renders the Kotlin record rather than re-deciding. - Anchoring home accepted a stale or unknown-precision fix. A wrong home offsets the fence everywhere and forever, which is what produced a 766 m reading while standing at home. Policy: Play Store is allowed by day (not during curfew) so infakt can be installed and updated; the sweep is default-deny for third-party packages, so anything installed from Play is hidden on the next at-home pass. Tachiyomi's per-source extension apks are covered by a new prefix allowlist rather than an exact list that goes stale whenever an extension is installed. `export.py` stopped subtracting the allowlist from `blockable_system_packages`. Sweepable is not hideable: that list decides which system packages are eligible for a decision, and `isAllowed` is what protects them. Removing an allowed system package from the sweep freezes it in its last state -- it would have stranded Play hidden permanently the moment it was allowlisted. Verified on the Pixel 6a: FINE granted POLICY_FIXED, `applied AT_HOME` with a 0 m distance from a +/-11 m GPS fix, YouTube/Chrome/Firefox absent from `pm list packages -e`, Play Store, infakt, RunnerUp and all five Tachiyomi packages present. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HjxL9kdAzZmGqQA5tMNrZ8 |
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| .. | ||
| cleanup-2026-05 | ||
| explanations | ||
| superpowers | ||
| device-owner-wipe-checklist.md | ||
| dns-filtering-parked.md | ||
| mcp-shortlist.html | ||
| syncyomi-restore-runbook.md | ||