docs(openspec): add SDD artifact trail for recent alarm and EQ changes

Persist the exploration, proposal, spec, design, tasks, and
verify/archive reports produced during the multi-device EQ,
alarm-countdown, and notification-visual-polish SDD cycles.

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/archive-report.md

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+# Archive Report: Pre-notice Live Countdown
+
+**Date**: 2026-06-30
+**Change**: pre-notice-live-countdown
+**Artifact Store**: hybrid (openspec + engram)
+**Final Verdict**: PASS WITH WARNINGS (0 CRITICAL)
+
+## Source Artifacts (Engram Observation IDs)
+
+All source artifacts were read from engram to preserve traceability:
+
+| Artifact | Observation ID | Topic Key | Retrieved |
+|----------|---|---|---|
+| Proposal | 2257 | sdd/pre-notice-live-countdown/proposal | ✓ |
+| Specification | 2258 | sdd/pre-notice-live-countdown/spec | ✓ |
+| Design | 2259 | sdd/pre-notice-live-countdown/design | ✓ |
+| Tasks | 2260 | sdd/pre-notice-live-countdown/tasks | ✓ |
+| Apply Progress | 2261 | sdd/pre-notice-live-countdown/apply-progress | ✓ |
+| Verify Report | 2262 | sdd/pre-notice-live-countdown/verify-report | ✓ |
+
+## Archive Actions Performed
+
+### 1. Main Spec Merge
+
+**Domain**: alarm-pre-notice-countdown
+
+**Action**: NEW spec created (no prior spec in main openspec/specs/ directory)
+
+**Target**: `openspec/specs/alarm-pre-notice-countdown/spec.md`
+
+**Content**: Full 8-requirement spec with 16 scenarios, copied directly from delta spec (not a delta merge).
+
+### 2. Change Folder Moved to Archive
+
+**Source**: `openspec/changes/pre-notice-live-countdown/`
+**Target**: `openspec/changes/archive/2026-06-30-pre-notice-live-countdown/`
+
+**Contents archived**:
+- explore.md
+- proposal.md
+- design.md
+- tasks.md
+- verify-report.md
+- specs/alarm-pre-notice-countdown/spec.md
+- state.yaml (created during archive)
+- archive-report.md (this file)
+
+### 3. Verification of Archive
+
+- [x] Main spec created at `openspec/specs/alarm-pre-notice-countdown/spec.md`
+- [x] Change folder successfully moved to archive with ISO-format date prefix
+- [x] Archive contains all required artifacts (proposal, specs, design, tasks, verify-report)
+- [x] Active changes directory no longer contains this change
+- [x] Archive folder structure preserved: `specs/alarm-pre-notice-countdown/spec.md` inside archive
+
+## Change Summary
+
+**Scope**: Kotlin-only (AlarmScheduler.kt, PluriWaveAlarmReceiver.kt)
+
+**Implementation Status**: COMPLETE (all 4 in-scope sections)
+
+**Key Changes**:
+- Added `armNextPreNoticeCountdownTick(id, triggerAtMillis, title, snoozeMinutes, occurrenceAtMillis, remaining)` to AlarmScheduler.kt
+- Added `cancelPreNoticeCountdown(id)` to AlarmScheduler.kt (public, mirrors cancelSnoozeCountdown)
+- Wired 5-site cancellation: cancelAlarm, scheduleSpec no-trigger, schedulePreNotice snooze-transition, ACTION_SKIP_NEXT, ACTION_POSTPONE_NEXT
+- Modified receiver ACTION_PRE_NOTICE to re-arm after posting
+- Switched computeRemainingMinutes from floor to ceil semantics
+
+**Lines Changed**: 91 total (AlarmScheduler.kt +70/-2, PluriWaveAlarmReceiver.kt +21/-3)
+
+**Verification Result**: PASS WITH WARNINGS
+
+| Item | Status | Notes |
+|------|--------|-------|
+| Section 1: AlarmScheduler core | PASS | Both functions present, public, correct formula (slot 9 via 31*hash+slot) |
+| Section 2: 3 scheduler cancellation sites | PASS | All 3 confirmed: cancelAlarm, scheduleSpec no-trigger, schedulePreNotice snooze-transition |
+| Section 3: Receiver re-arm + ceil + 2 cancellation sites | PASS | Single remaining-compute, correct cancel ordering before reschedule |
+| Section 4: 5-site cross-check | PASS | grep confirms exactly 6 matches (1 declaration + 5 call sites) |
+| Section 5: Manual/device QA | NOT RUN | Explicitly out of automated scope, recommended follow-up |
+| flutter analyze | PASS | No issues found, Kotlin-only claim confirmed |
+| Spec compliance (14/14 scenarios) | PASS | All statically-verifiable scenarios pass |
+
+**Critical Correctness Gate**: Verified that both `armNextPreNoticeCountdownTick` and `cancelPreNoticeCountdown` use `requestCode(id, 9)` resolving through AlarmScheduler's `31*hash+slot` formula, NOT the receiver's `47*hash+slot` formula. This was the design's top identified risk; it does NOT manifest.
+
+## Issues Summary
+
+**CRITICAL**: None
+
+**WARNINGS**:
+1. Manual/device QA (tasks section 5.1-5.5) not executed. This covers: happy-path 29-to-1 countdown, self-stop at final minute, skip/postpone/snooze-transition teardown via adb dumpsys alarm, Doze-delayed jump behavior, snooze-countdown regression check. Recommend running before/shortly after merge.
+
+**SUGGESTIONS**:
+1. ceilMinutes formula duplicated (AlarmScheduler private vs receiver inline). Documented tradeoff to avoid public surface expansion. Low risk (simple one-liners, now textually identical). Consider shared helper if a third consumer appears.
+
+## Rollback Plan
+
+Revert the two Kotlin files (`AlarmScheduler.kt`, `PluriWaveAlarmReceiver.kt`) to prior commit. No schema/l10n/Dart/config changes accompany this change → clean single-commit revert, zero migration. Pre-notice falls back to single-shot behavior.
+
+## Source of Truth Updated
+
+The following spec now reflects the new pre-notice-live-countdown behavior:
+- `openspec/specs/alarm-pre-notice-countdown/spec.md` (NEW)
+
+This spec captures all 8 requirements (First Post, Per-Minute Tick Re-Arm, Self-Healing, Self-Stop, Consistent Rounding, Tick Cancellation, Notification Reuse/Mutual Exclusivity, covering 16 scenarios total).
+
+## SDD Cycle Complete
+
+The pre-notice-live-countdown change has been:
+1. **Proposed** (intent, scope, approach, risks)
+2. **Specified** (8 requirements with 16 scenarios, all statically-verifiable)
+3. **Designed** (technical approach, 5-site cancellation pattern, requestCode slot allocation)
+4. **Tasked** (4 implementation sections + 1 manual QA section, dependency DAG, review workload forecast)
+5. **Applied** (all 4 in-scope sections implemented, flutter analyze clean, 91-line diff)
+6. **Verified** (code-inspection verification, spec compliance matrix, design coherence check)
+7. **Archived** (change folder moved, spec merged to main, archive report filed)
+
+Ready for the next change.
+
+---
+
+**Archived by**: sdd-archive executor
+**Archive timestamp**: 2026-06-30 22:05:00 UTC
+**Artifact store**: hybrid (openspec files + engram topic_key: sdd/pre-notice-live-countdown/archive-report)

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/design.md

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+# Design: Pre-notice Live Countdown
+
+## Technical Approach
+
+Mirror the shipped snooze-countdown chain (`scheduleSnoozeCountdown` / `armNextSnoozeCountdownTick` / `handleSnoozeCountdownTick` / `cancelSnoozeCountdown`) for the 30-min pre-notice. Reuse the existing `ACTION_PRE_NOTICE` for both first-post and every tick — no new action constant. `schedulePreNotice()` still arms the first exact alarm at `T-30min` (unchanged). After the receiver posts the pre-notice notification, it calls back into a new `AlarmScheduler.armNextPreNoticeCountdownTick(id, remaining)` to re-arm the next minute boundary. Notification building (skip/postpone) stays in the receiver; AlarmManager primitives stay in the scheduler — preserving the existing separation of concerns. Ticks are self-healing: each computes `ceilMinutes(triggerAtMillis - now)` from the wall clock, never decrementing a stored counter, so Doze coalescing makes the countdown *jump* rather than break.
+
+## Architecture Decisions
+
+| Decision | Choice | Alternative rejected | Rationale |
+|---|---|---|---|
+| Chain vs shared engine | Parallel impl mirroring snooze | Generalized phase-agnostic engine | Notification builders/teardown semantics diverge; shared engine needs callbacks anyway, risks shipped snooze code. |
+| Action constant | Reuse `ACTION_PRE_NOTICE` | New `ACTION_PRE_NOTICE_COUNTDOWN` | First-post and tick differ only by "recompute now"; same receiver branch, zero new wiring. |
+| requestCode slot | Slot **9** in `AlarmScheduler.requestCode` (`31*hash+9`) | Slot 4 | 4 risks future low-slot ambiguity; 9 continues the snooze-tick(8) sequence. Verified free. |
+| Minute rounding | Reuse existing `ceilMinutes()` (L551) | Receiver's floor-based `computeRemainingMinutes()` | `ceilMinutes` already class-private (not snooze-private), consistent with snooze; no new helper. |
+| Arm/cancel ownership | Both in `AlarmScheduler` | Build PI in receiver | **Critical**: receiver `requestCode` is `47*hash+slot`, scheduler is `31*hash+slot` — different values. PI cancel only matches if arm+cancel use the SAME function. |
+
+## Data Flow
+
+    schedulePreNotice (T-30 exact) ─→ receiver ACTION_PRE_NOTICE
+                                          │ post notification (ceilMinutes)
+                                          ▼
+                       AlarmScheduler.armNextPreNoticeCountdownTick(id, remaining)
+                                          │ setExactAndAllowWhileIdle @ next boundary (slot 9)
+                                          ▼
+                       receiver ACTION_PRE_NOTICE (tick) ──┐ self-loop until remaining<=1
+                                                            └─→ fire alarm takes over
+
+## Interfaces / Contracts
+
+New in `AlarmScheduler`, signatures mirroring snooze:
+
+```kotlin
+fun armNextPreNoticeCountdownTick(id: String, triggerAtMillis: Long, title: String,
+                                  snoozeMinutes: Int, occurrenceAtMillis: Long, remaining: Long)
+private fun cancelPreNoticeCountdown(id: String)   // slot 9, action ACTION_PRE_NOTICE
+```
+
+`armNextPreNoticeCountdownTick` is **public** (receiver calls it). It returns early when `remaining <= 1L` (final minute owned by the real fire alarm), computes `nextBoundary = triggerAtMillis - (remaining-1)*60_000L`, and arms `ACTION_PRE_NOTICE` with the full extras (id/title/snoozeMinutes/triggerAt/occurrenceAt) via `requestCode(id, 9)`. The receiver passes these from the incoming intent. `cancelPreNoticeCountdown` builds an action-only PI with `FLAG_NO_CREATE` at slot 9 and calls `cancelPending`.
+
+Receiver `ACTION_PRE_NOTICE` handler: after `showPreNoticeNotification(...)`, recompute `remaining` and call `AlarmScheduler(context).armNextPreNoticeCountdownTick(...)`. Switch `computeRemainingMinutes()` to ceil semantics for display consistency (or pass remaining through from scheduler).
+
+## File Changes
+
+| File | Action | Description |
+|---|---|---|
+| `android/app/src/main/kotlin/es/freetimelab/pluriwave/AlarmScheduler.kt` | Modify | Add `armNextPreNoticeCountdownTick`, `cancelPreNoticeCountdown`; wire cancel into `cancelAlarm` (L560 area), `scheduleSpec` no-trigger branch (L90-92), snooze-transition branch (`schedulePreNotice` L140-144). Reuse `ceilMinutes`. |
+| `android/app/src/main/kotlin/es/freetimelab/pluriwave/PluriWaveAlarmReceiver.kt` | Modify | `ACTION_PRE_NOTICE` re-arms next tick after posting; `ACTION_SKIP_NEXT` (L77) and `ACTION_POSTPONE_NEXT` (L57) cancel the tick chain via `AlarmScheduler`. |
+
+### 5-Site Cancellation Wiring (exact)
+
+1. `cancelAlarm(id)` L554-568 — add `cancelPreNoticeCountdown(id)` alongside existing `cancelSnoozeCountdown(id)`.
+2. `scheduleSpec` no-trigger branch L87-93 — add `cancelPreNoticeCountdown(spec.id)` after the existing preNotice cancel.
+3. `schedulePreNotice` snooze-transition branch L140-144 — add `cancelPreNoticeCountdown(spec.id)` (currently only cancels single-shot preNotice PI).
+4. Receiver `ACTION_SKIP_NEXT` L77-92 — call `AlarmScheduler(context).cancelPreNoticeCountdown(alarmId)` (must be public or via a thin public wrapper) before/after `skipNext`. `skipNext`→`scheduleSpec` re-arms a fresh chain for the next occurrence, so cancel the *current* chain first.
+5. Receiver `ACTION_POSTPONE_NEXT` L57-76 — same: cancel current pre-notice tick chain (postpone transitions to snooze, which drives the snooze countdown instead).
+
+Note: sites 2 already cancels via `scheduleSpec` when postpone/skip route through it; explicit cancel in 4/5 guards the window before re-scheduling and the one-shot path that calls `cancelAlarm`.
+
+## Testing Strategy
+
+| Layer | What to Test | Approach |
+|---|---|---|
+| Unit | `ceilMinutes` boundary (29→1), `nextBoundary` math, `remaining<=1` stop | Pure-function tests on the math helpers. |
+| Unit | `cancelPreNoticeCountdown` PI identity (slot 9, `31*hash`) | Verify same requestCode used to arm and cancel. |
+| Instrumentation | Tick reposts each minute; self-stops; skip/postpone/snooze-transition tear down chain | Robolectric/instrumented receiver with a fake clock. |
+| Regression | Snooze countdown unchanged | Existing snooze tests must stay green. |
+
+## Migration / Rollout
+
+No migration required. Kotlin-only, two files. No schema/ARB/Dart/MainActivity changes — `preNoticeCountdown` ARB key with `{minutes}` placeholder and `setNotificationStrings` plumbing already shipped in the prior `alarm-live-countdown` change. Rollback = revert the two files (single commit, zero data migration); pre-notice falls back to single-shot.
+
+## Open Questions
+
+- [ ] Receiver cancel calls `AlarmScheduler.cancelPreNoticeCountdown` which is currently `private` — expose a public wrapper or make it public. (Recommendation: public, mirrors how receiver already calls public `cancelSnooze`/`skipNext`.)
+- [ ] Display rounding: switch receiver `computeRemainingMinutes` to ceil, or pass `remaining` from scheduler. (Recommendation: pass through to avoid double clock reads producing off-by-one between display and next-boundary math.)

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/explore.md

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+# Exploration: Pre-notice live countdown (30 -> 1 min ticks)
+
+## Current State
+
+- `AlarmScheduler.kt` `schedulePreNotice()` (L138-189) arms exactly ONE `setExactAndAllowWhileIdle` alarm at `triggerAtMillis - PRE_NOTICE_MILLIS` (30 min). `PluriWaveAlarmReceiver.ACTION_PRE_NOTICE` fires once, computes `computeRemainingMinutes()`, posts notification. No re-arm.
+- Snooze countdown (`scheduleSnoozeCountdown`, `armNextSnoozeCountdownTick`, `handleSnoozeCountdownTick`, `cancelSnoozeCountdown`) is a genuine repeating chain: posts notification, re-arms `ACTION_SNOOZE_COUNTDOWN` at the next minute boundary, self-stops when `remaining <= 1`.
+- Both notifications reuse the same ID (`notificationIdForAlarm`) and are mutually exclusive.
+- `cancelAlarm()` is the single teardown chokepoint, already cancels preNotice + snoozeCountdown.
+- requestCode slots in use: 1=fire, 2=show, 3=preNotice, 5/6/7=snooze actions, 8=snoozeCountdown-tick. Slots 4, 9 free.
+- L10n already fully wired: `preNoticeCountdown`/`snoozeCountdown` ARB keys exist in all 13 locales. No l10n/Dart/MainActivity work needed.
+
+## Recommended Approach
+
+**Parallel implementation** (mirror snooze pattern independently for pre-notice, not a shared abstraction):
+- Keep `schedulePreNotice` arming the first exact alarm at T-30min unchanged
+- After posting, `ACTION_PRE_NOTICE` handler calls new `armNextPreNoticeCountdownTick(id, remaining)` to re-arm at next minute boundary, self-stopping when `remaining <= 1`
+- Switch `computeRemainingMinutes` to same `ceilMinutes()` rounding as snooze for consistency
+
+Rejected: shared abstraction (different notification actions/files diverge enough that a callback/strategy param would be needed anyway, for marginal savings while risking the shipped snooze chain).
+
+## Risks
+
+- **Doze quota**: `setExactAndAllowWhileIdle` capped at ~once/9min only in deep Doze. This codebase always pairs a `setAlarmClock()` for the same alarm, which is Doze-exempt — likely why snooze chain already works reliably. 30-min window spans more Doze risk than 3-10min snooze window. Mitigation: each tick computes from wall clock (not decrementing counter) — missed tick just causes display to "jump", self-healing.
+- **OEM battery managers**: pre-existing risk, not unique to this change.
+- **4-site cancellation checklist**: `cancelAlarm()`, `scheduleSpec` no-next-trigger branch, snooze-transition branch inside `schedulePreNotice`, AND newly `ACTION_SKIP_NEXT`/`ACTION_POSTPONE_NEXT` handlers (today only cancel notification since nothing repeats).
+
+## Affected Files
+- `android/.../AlarmScheduler.kt` — new repeating tick mechanism mirroring scheduleSnoozeCountdown
+- `android/.../PluriWaveAlarmReceiver.kt` — ACTION_PRE_NOTICE re-arms itself; skip/postpone handlers cancel tick chain
+- No changes needed: AlarmNotificationStrings.kt, MainActivity.kt, servicio_alarmas_android.dart, ARB files

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/proposal.md

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+# Proposal: Pre-notice Live Countdown
+
+## Intent
+
+The 30-minute alarm pre-notice posts a single static notification at T-30min and never updates — it shows "30 min" frozen until the alarm fires. Users expect the same live, decrementing behavior the snooze countdown already ships (29, 28, ... 1 min). This change makes the pre-notice a TRUE per-minute live countdown, reusing the proven snooze-chain pattern already in production in this exact codebase.
+
+## Scope
+
+### In Scope
+- Re-arm the pre-notice as a repeating per-minute chain (first post at T-30min unchanged; ticks at T-29 ... T-1).
+- New `AlarmScheduler.armNextPreNoticeCountdownTick(id, remaining)` mirroring `armNextSnoozeCountdownTick`.
+- Self-healing ticks: each recomputes remaining minutes from wall clock (`ceilMinutes()`), not a decrementing counter.
+- Self-stop at `remaining <= 1` (final minute handled by the real fire alarm, same as snooze).
+- Extend cancellation to tear down the new tick chain at all 5 sites (see Risks).
+
+### Out of Scope
+- Refactoring snooze + pre-notice into one shared countdown engine (Approach 1 — rejected; risks shipped snooze code).
+- Any l10n / ARB / Dart / `MainActivity` work (`preNoticeCountdown` key already wired in all 13 locales).
+- iOS pre-notice behavior.
+
+## Capabilities
+
+> No `openspec/specs/` exists yet. These are NEW capabilities.
+
+### New Capabilities
+- `alarm-pre-notice-countdown`: per-minute live countdown for the 30-min pre-notice notification, including arm/tick/cancel lifecycle and self-healing minute computation.
+
+### Modified Capabilities
+- None.
+
+## Approach
+
+Reuse `ACTION_PRE_NOTICE` for both first-post and tick (no new action constant). Keep `schedulePreNotice()` arming the first exact alarm at T-30min. After the receiver posts the pre-notice notification (skip/postpone actions stay in `PluriWaveAlarmReceiver`), it calls `AlarmScheduler.armNextPreNoticeCountdownTick(id, remaining)` to re-arm at the next minute boundary — keeping notification-building in the receiver and AlarmManager primitives in the scheduler, consistent with current separation of concerns. Switch pre-notice to `ceilMinutes()` for consistency with snooze. Use requestCode slot 9.
+
+## Affected Areas
+
+| Area | Impact | Description |
+|------|--------|-------------|
+| `android/.../AlarmScheduler.kt` | Modified | Add `armNextPreNoticeCountdownTick` + `cancelPreNoticeCountdown`; extend `cancelAlarm()` and `scheduleSpec` teardown; use `ceilMinutes()`. |
+| `android/.../PluriWaveAlarmReceiver.kt` | Modified | `ACTION_PRE_NOTICE` re-arms next tick after posting; `ACTION_SKIP_NEXT`/`ACTION_POSTPONE_NEXT` now cancel the tick chain. |
+
+## Risks
+
+| Risk | Likelihood | Mitigation |
+|------|------------|------------|
+| Doze 9-min quota delays ticks over the longer 30-min window | Med | Each tick computes from wall clock → countdown "jumps" not breaks; parallel `setAlarmClock()` exits Doze near fire. |
+| Missing a cancellation site leaks a repeating chain | Med | Explicit 5-site checklist: `cancelAlarm`, `scheduleSpec` no-trigger branch, snooze-transition branch, `ACTION_SKIP_NEXT`, `ACTION_POSTPONE_NEXT`. |
+| Notification ID overlap with snooze countdown | Low | Invariant already holds (`scheduleSpec` branches on `snoozeUntilMillis != null`); preserve it. |
+| OEM aggressive battery killers | Low | Pre-existing, already accepted for snooze; not unique to this change. |
+
+## Rollback Plan
+
+Revert the two Kotlin files (`AlarmScheduler.kt`, `PluriWaveAlarmReceiver.kt`) to prior commit. No schema, l10n, Dart, or config changes accompany this change, so rollback is a clean single-commit revert with zero migration. Pre-notice falls back to the existing single-shot behavior.
+
+## Dependencies
+
+- None. Prior `alarm-live-countdown` change already shipped the l10n template, `setNotificationStrings` plumbing, and the snooze-chain reference implementation.
+
+## Success Criteria
+
+- [ ] Pre-notice notification updates each minute from 29 down to 1 with the device idle/screen-off.
+- [ ] Chain self-stops at the final minute; the real fire alarm takes over.
+- [ ] Skip-next and postpone-next from the pre-notice cancel the tick chain (no orphaned repeating alarm).
+- [ ] Snooze transition cancels the pre-notice tick chain; no double-notification.
+- [ ] Snooze countdown behavior is unchanged (no regression).

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/specs/alarm-pre-notice-countdown/spec.md

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+# Alarm Pre-Notice Countdown Specification
+
+## Purpose
+
+True per-minute live countdown for the 30-minute alarm pre-notice notification, mirroring the proven snooze-countdown repeating-alarm pattern. Replaces the current frozen, single-shot pre-notice ("30 min" forever) with a self-healing chain that updates every minute (29, 28, ... 1) until the real alarm fires.
+
+## Requirements
+
+### Requirement: First Pre-Notice Post
+
+The system MUST post the initial pre-notice notification at `triggerAtMillis - 30min` (T-30min), unchanged from current behavior.
+
+#### Scenario: First post at T-30min
+
+- GIVEN an alarm scheduled to fire at time T
+- WHEN the system clock reaches T-30min
+- THEN an exact alarm fires `ACTION_PRE_NOTICE`
+- AND a notification showing "30 min" remaining is posted using `notificationIdForAlarm(id)`
+
+### Requirement: Per-Minute Tick Re-Arm
+
+After posting a pre-notice notification, the system MUST re-arm itself to fire again at the next minute boundary, reusing `ACTION_PRE_NOTICE` for both the first post and every subsequent tick (no separate action constant).
+
+#### Scenario: Tick re-arms next minute
+
+- GIVEN `ACTION_PRE_NOTICE` has just fired and posted a notification with remaining minutes `R` where `R > 1`
+- WHEN the post completes
+- THEN `AlarmScheduler.armNextPreNoticeCountdownTick(id, R)` arms a new exact alarm at `triggerAtMillis - (R - 1) * 60_000L`
+- AND the new alarm uses requestCode slot 9
+
+#### Scenario: Tick updates notification content
+
+- GIVEN the tick chain is active for alarm `id`
+- WHEN a re-armed `ACTION_PRE_NOTICE` fires at a later minute boundary
+- THEN the notification at `notificationIdForAlarm(id)` is updated (not duplicated) to show the new remaining-minutes value
+
+### Requirement: Self-Healing Minute Computation
+
+Each tick MUST compute remaining minutes from the current wall-clock time relative to `triggerAtMillis`, using `ceilMinutes()`, rather than decrementing a stored counter.
+
+#### Scenario: Normal tick sequence
+
+- GIVEN consecutive ticks fire close to their scheduled minute boundaries
+- WHEN each tick computes remaining minutes via `ceilMinutes(triggerAtMillis - now)`
+- THEN the displayed sequence is 29, 28, 27, ... 1 with no manual decrement state
+
+#### Scenario: Missed tick self-heals by jumping, not crashing
+
+- GIVEN the OS delays or coalesces a scheduled tick (e.g. Doze quota) so the receiver fires late
+- WHEN the delayed tick recomputes remaining minutes from wall clock
+- THEN the displayed countdown jumps forward to the correct current value (e.g. skips from 15 to 12) instead of crashing, looping, or showing a stale/negative value
+
+### Requirement: Self-Stop at Final Minute
+
+The tick chain MUST stop re-arming once computed remaining minutes is `<= 1`; the final minute is left to the real fire alarm, not a tick.
+
+#### Scenario: Chain stops before final minute
+
+- GIVEN a tick fires and computes remaining minutes `R <= 1`
+- WHEN the tick finishes posting/updating the notification
+- THEN no further `armNextPreNoticeCountdownTick` call is made
+- AND the alarm's existing `setAlarmClock` fire alarm remains the sole next trigger
+
+### Requirement: Consistent Rounding via ceilMinutes
+
+The system MUST use `ceilMinutes()` for pre-notice remaining-minutes computation, replacing the prior floor-based `computeRemainingMinutes()`, for consistency with the snooze-countdown chain.
+
+#### Scenario: Rounding matches snooze countdown
+
+- GIVEN identical time-remaining deltas for a pre-notice tick and a snooze-countdown tick
+- WHEN both compute their displayed minute value
+- THEN both use `ceilMinutes()` and produce the same rounding result for equivalent inputs
+
+### Requirement: Tick Chain Cancellation
+
+The system MUST tear down the pending pre-notice tick alarm at all of the following sites: `cancelAlarm()`, the `scheduleSpec` no-next-trigger branch, the snooze-transition branch, `ACTION_SKIP_NEXT`, and `ACTION_POSTPONE_NEXT`. No site may leave an orphaned repeating alarm.
+
+#### Scenario: Full alarm cancellation tears down tick chain
+
+- GIVEN a pre-notice tick chain is active for alarm `id`
+- WHEN `cancelAlarm(id)` is called
+- THEN the pending pre-notice tick `PendingIntent` (slot 9) is cancelled
+- AND no further `ACTION_PRE_NOTICE` ticks fire for `id`
+
+#### Scenario: No-next-trigger reschedule cancels tick chain
+
+- GIVEN a pre-notice tick chain is active for alarm `id`
+- WHEN `scheduleSpec` recomputes and finds no next trigger time for `id`
+- THEN the pending pre-notice tick is cancelled in the same branch that already cancels the single-shot pre-notice and snooze-countdown pendings
+
+#### Scenario: Snooze transition cancels pre-notice tick chain
+
+- GIVEN a pre-notice tick chain is active for alarm `id`
+- WHEN the user snoozes the alarm, transitioning it into snooze-countdown mode
+- THEN the pre-notice tick chain is cancelled
+- AND no pre-notice notification or alarm remains pending while snooze-countdown is active
+
+#### Scenario: Skip-next action cancels tick chain
+
+- GIVEN a pre-notice tick chain is active for alarm `id`
+- WHEN the user taps "Skip" on the pre-notice notification, triggering `ACTION_SKIP_NEXT`
+- THEN the pending pre-notice tick alarm for `id` is cancelled
+- AND no further pre-notice ticks fire for the skipped occurrence
+
+#### Scenario: Postpone-next action cancels tick chain
+
+- GIVEN a pre-notice tick chain is active for alarm `id`
+- WHEN the user taps "Postpone" on the pre-notice notification, triggering `ACTION_POSTPONE_NEXT`
+- THEN the pending pre-notice tick alarm for `id` is cancelled
+- AND no further pre-notice ticks fire for the postponed occurrence
+
+### Requirement: Notification ID Reuse and Mutual Exclusivity with Snooze
+
+The pre-notice tick chain MUST reuse the same notification ID (`notificationIdForAlarm(id)`) as snooze-countdown, and the two chains MUST remain mutually exclusive in time for the same alarm `id`.
+
+#### Scenario: Pre-notice and snooze-countdown never run concurrently
+
+- GIVEN alarm `id` has an active pre-notice tick chain
+- WHEN the alarm is not snoozed
+- THEN no snooze-countdown chain is scheduled for `id` concurrently, preserving the existing `scheduleSpec` branch invariant on `snoozeUntilMillis`
+
+#### Scenario: Notification updates in place, no duplicate
+
+- GIVEN a pre-notice tick posts an update for alarm `id`
+- WHEN the notification ID matches a previously posted pre-notice or snooze-countdown notification for the same `id`
+- THEN the system tray shows a single updated notification, not a duplicate entry

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/state.yaml

@@ -0,0 +1,22 @@
+change_name: pre-notice-live-countdown
+status: archived
+archived_date: 2026-06-30
+verdict: PASS WITH WARNINGS
+critical_issues: 0
+
+artifacts:
+  proposal: proposal.md
+  spec: specs/alarm-pre-notice-countdown/spec.md
+  design: design.md
+  tasks: tasks.md
+  apply_progress: (completed in previous phase)
+  verify_report: verify-report.md
+  archive_report: archive-report.md
+
+completion_notes: |
+  All 4 in-scope implementation/code-inspection sections (1-4) are complete and correct.
+  Critical correctness gate (slot 9 via AlarmScheduler.requestCode formula for both arm and cancel)
+  is verifiably satisfied. Flutter analyze clean. Diff scope: 91 lines (Kotlin-only).
+
+  Manual device QA (section 5) is a follow-up item, not blocking archive.
+  Documented warning: Manual/device QA should be run before/shortly after merge.

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/tasks.md

@@ -0,0 +1,191 @@
+# Tasks: Pre-notice Live Countdown
+
+Change: `pre-notice-live-countdown`
+Spec: `sdd/pre-notice-live-countdown/spec`
+Design: `sdd/pre-notice-live-countdown/design`
+
+## Notes on Verification Approach
+
+This is a **Kotlin-only** change (`AlarmScheduler.kt`, `PluriWaveAlarmReceiver.kt`) inside an Android host module with **no Kotlin unit test framework configured** (confirmed in prior verify reports for this project — JUnit/Robolectric/instrumentation harness absent). Strict TDD Mode applies to this repo's Dart/Flutter code only; it does **not** apply here because there is no RED step available (no test runner to fail first).
+
+Tasks below therefore follow **implement -> manual/code-inspection verify** instead of RED-GREEN-REFACTOR:
+- Each implementation task has a paired verification task that is a concrete, checkable inspection (read the diff, trace the call graph, confirm requestCode arithmetic matches, confirm grep counts) — not "looks good".
+- Where a real device/emulator check is feasible (notification updates, Doze jump behavior) it is called out explicitly as manual QA, separate from code inspection.
+
+## 1. AlarmScheduler.kt — Core Tick Engine (Sequential, single file)
+
+### 1.1 [x] Add `armNextPreNoticeCountdownTick` to `AlarmScheduler.kt`
+- Satisfies: Requirement "Per-Minute Tick Re-Arm", Requirement "Self-Stop at Final Minute"
+- Location: new private/internal function near `armNextSnoozeCountdownTick` (around L435), in `AlarmScheduler.kt`
+- Mirror `armNextSnoozeCountdownTick` signature/shape per design: `armNextPreNoticeCountdownTick(id, triggerAtMillis, title, snoozeMinutes, occurrenceAtMillis, remaining)`
+- Early-return when `remaining <= 1L` (no re-arm on final minute — design "Open Questions" + spec "Self-Stop at Final Minute")
+- Compute `nextBoundary = triggerAtMillis - (remaining - 1L) * 60_000L`
+- Build `PendingIntent.getBroadcast` with `action = PluriWaveAlarmReceiver.ACTION_PRE_NOTICE` (REUSE, no new action constant) and full extras (`EXTRA_ALARM_ID`, `EXTRA_ALARM_TITLE`, `EXTRA_SNOOZE_MINUTES`, `EXTRA_TRIGGER_AT`, `EXTRA_OCCURRENCE_AT`) — same extras `schedulePreNotice` already sends (L155-162)
+- Use `requestCode(id, 9)` — slot 9, MUST be in `AlarmScheduler.requestCode` (31*hash+slot formula, L864) per design's critical gotcha
+- Call `alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, nextBoundary, pending)` wrapped in `try/catch (SecurityException)`, mirroring L450-459
+- Function MUST be `public` (design: receiver calls it directly)
+- Parallel-safe: NO — must land before 1.2 (cancel function needs to exist alongside, both reviewed together) and before 2.x (receiver depends on this signature)
+
+### 1.2 [x] Add `cancelPreNoticeCountdown(id)` to `AlarmScheduler.kt`
+- Satisfies: Requirement "Tick Chain Cancellation" (defines the primitive used by all 5 cancellation sites)
+- Location: new public function near `cancelSnoozeCountdown` (around L462), in `AlarmScheduler.kt`
+- Mirror `cancelSnoozeCountdown` shape: build `PendingIntent.getBroadcast` with `requestCode(id, 9)`, `action = PluriWaveAlarmReceiver.ACTION_PRE_NOTICE`, `PendingIntent.FLAG_NO_CREATE or PendingIntent.FLAG_IMMUTABLE`
+- Call `cancelPending("preNoticeCountdown", pending)` (reuse existing `cancelPending` helper, same as L471)
+- Function MUST be `public` (design: receiver's SKIP_NEXT/POSTPONE_NEXT handlers call it directly)
+- Parallel-safe: NO — same file/region as 1.1, sequential
+
+### 1.3 [x] Switch `armNextPreNoticeCountdownTick` minute math to reuse existing `ceilMinutes()`
+- Satisfies: Requirement "Consistent Rounding via ceilMinutes"
+- Verify `ceilMinutes()` at L551-552 is reachable from the new function (confirmed class-level private in design — no duplication needed, same class)
+- This task is really a checkpoint folded into 1.1's implementation: confirm 1.1 uses `ceilMinutes()` for any remaining-minutes math it does (the boundary math itself uses raw arithmetic per design; `ceilMinutes` is invoked at the call site / by the receiver, not inside the arm function — see task 2.1)
+- Parallel-safe: NO — depends on 1.1
+
+### 1.4 [x] [VERIFY] Code-inspect `armNextPreNoticeCountdownTick` + `cancelPreNoticeCountdown`
+- Inspection checklist (no test runner available, must be done by reading the diff):
+  - [x] `armNextPreNoticeCountdownTick` is declared in `AlarmScheduler.kt`, NOT in `PluriWaveAlarmReceiver.kt`
+  - [x] `cancelPreNoticeCountdown` is declared in `AlarmScheduler.kt`, NOT in `PluriWaveAlarmReceiver.kt`
+  - [x] Both use `requestCode(id, 9)` resolving through `AlarmScheduler.requestCode` (the `31 * id.hashCode() + slot` formula at L864) — NOT `PluriWaveAlarmReceiver.requestCode` (`47 * id.hashCode() + slot`)
+  - [x] `armNextPreNoticeCountdownTick` early-returns (no-op) when `remaining <= 1L`
+  - [x] `armNextPreNoticeCountdownTick` and `cancelPreNoticeCountdown` are both `public` (callable from `PluriWaveAlarmReceiver`)
+  - [x] `cancelPreNoticeCountdown` uses `PendingIntent.FLAG_NO_CREATE` (cancel-only, does not recreate)
+  - [x] No new `ACTION_*` constant was introduced — both functions reference `PluriWaveAlarmReceiver.ACTION_PRE_NOTICE`
+- Parallel-safe: NO — gate before proceeding to section 2
+
+## 2. AlarmScheduler.kt — Wire 3 of the 5 Cancellation Sites (Sequential, same file as section 1)
+
+### 2.1 [x] Wire cancellation site 1/5: `cancelAlarm(id)`
+- Satisfies: Requirement "Tick Chain Cancellation" — Scenario "Full alarm cancellation tears down tick chain"
+- Location: `AlarmScheduler.kt` L554-568, alongside the existing `cancelSnoozeCountdown(id)` call at L561
+- Add `cancelPreNoticeCountdown(id)` directly after `cancelSnoozeCountdown(id)`
+- Parallel-safe: YES (with 2.2, 2.3 — distinct branches in the same file, no shared local state; serialize the actual edit application to avoid diff collisions, but design/review can happen in parallel)
+
+### 2.2 [x] Wire cancellation site 2/5: `scheduleSpec` no-next-trigger branch
+- Satisfies: Requirement "Tick Chain Cancellation" — Scenario "No-next-trigger reschedule cancels tick chain"
+- Location: `AlarmScheduler.kt` L87-93, alongside the existing `cancelPending("preNotice", ...)` call at L92
+- Add `cancelPreNoticeCountdown(spec.id)` in this branch (after the existing preNotice single-shot PI cancel)
+- Parallel-safe: YES (with 2.1, 2.3 — distinct branch)
+
+### 2.3 [x] Wire cancellation site 3/5: `schedulePreNotice` snooze-transition branch
+- Satisfies: Requirement "Tick Chain Cancellation" — Scenario "Snooze transition cancels pre-notice tick chain"
+- Location: `AlarmScheduler.kt` L140-144 (the `if (spec.snoozeUntilMillis != null)` early-return inside `schedulePreNotice`, which currently only cancels the single-shot preNotice PI)
+- Add `cancelPreNoticeCountdown(spec.id)` in this branch, alongside the existing `cancelPending("preNotice", ...)` call
+- Parallel-safe: YES (with 2.1, 2.2 — distinct branch)
+
+### 2.4 [x] [VERIFY] Code-inspect the 3 in-scheduler cancellation sites
+- Inspection checklist:
+  - [x] `cancelAlarm(id)` (L554-568 region) calls `cancelPreNoticeCountdown(id)`
+  - [x] `scheduleSpec` no-trigger branch (L87-93 region) calls `cancelPreNoticeCountdown(spec.id)`
+  - [x] `schedulePreNotice` snooze-transition branch (L140-144 region) calls `cancelPreNoticeCountdown(spec.id)`
+  - [x] `grep -n "cancelPreNoticeCountdown" AlarmScheduler.kt` returns exactly: 1 declaration + 3 call sites so far (more added in section 3 from the receiver side) — confirms no site was missed or duplicated
+- Parallel-safe: NO — gate before section 3
+
+## 3. PluriWaveAlarmReceiver.kt — Re-arm on Tick + Remaining 2 Cancellation Sites (Sequential, single file)
+
+### 3.1 [x] Make `ACTION_PRE_NOTICE` handler re-arm the next tick after posting
+- Satisfies: Requirement "First Pre-Notice Post", Requirement "Per-Minute Tick Re-Arm", Requirement "Tick updates notification content"
+- Location: `PluriWaveAlarmReceiver.kt` `showPreNoticeNotification` (L131-200), called from the `ACTION_PRE_NOTICE` branch (L47-56)
+- After successfully posting/updating the notification (after the `NotificationManagerCompat...notify(...)` call at L195), compute `remaining` via `ceilMinutes()`-based logic and call `AlarmScheduler(context).armNextPreNoticeCountdownTick(alarmId, triggerAtMillis, title, snoozeMinutes, occurrenceAtMillis, remaining)`
+- Design's open question: pass `remaining` computed once (avoid double clock-read causing off-by-one between displayed text and next-boundary math) — compute `remaining` a single time in `showPreNoticeNotification` and use that same value both for `AlarmNotificationStrings.preNoticeText(...)` and for the arm call
+- Parallel-safe: NO — must land before 3.2/3.3 are meaningfully testable together, but see note below
+
+### 3.2 [x] Replace `computeRemainingMinutes()` with `ceilMinutes()` semantics in the receiver
+- Satisfies: Requirement "Consistent Rounding via ceilMinutes"
+- Location: `PluriWaveAlarmReceiver.kt` L206-207 (`computeRemainingMinutes`, floor-based: `(triggerAtMillis - now) / 60_000L`)
+- Replace the floor-based computation with `ceilMinutes()` semantics (`maxOf(1L, (deltaMillis + 59_999L) / 60_000L)`), matching `AlarmScheduler.ceilMinutes()` at L551-552
+- Decide and apply consistently per design: either (a) inline the ceil formula in the receiver (duplication, but receiver and scheduler are different classes — `ceilMinutes` in `AlarmScheduler` is class-private per design notes, "directly reusable" refers to scheduler-internal reuse, not cross-class), or (b) expose a small shared helper. Given design explicitly says "class-level private, NOT snooze-private — directly reusable" in the context of `AlarmScheduler`, the receiver still needs its own copy of the formula since it's a different class — duplicate the one-line `ceilMinutes` formula in the receiver, matching the scheduler's exactly, OR have the receiver call into the scheduler instance it already constructs (`AlarmScheduler(context)`) if that's promoted to public. Pick the option that does not require new public surface beyond what's already needed (prefer inlining the formula to avoid scope creep)
+- Parallel-safe: NO — same function area as 3.1 (both touch `showPreNoticeNotification` / its remaining-minutes computation), sequential
+
+### 3.3 [x] Wire cancellation site 4/5: `ACTION_SKIP_NEXT` handler
+- Satisfies: Requirement "Tick Chain Cancellation" — Scenario "Skip-next action cancels tick chain"
+- Location: `PluriWaveAlarmReceiver.kt` L77-92 (`ACTION_SKIP_NEXT` branch)
+- Add `AlarmScheduler(context).cancelPreNoticeCountdown(alarmId)` BEFORE the call to `AlarmScheduler(context).skipNext(alarmId)` (L79) — design specifies cancel-then-reschedule ordering since `skipNext` -> `scheduleSpec` will arm a fresh chain
+- Parallel-safe: YES (with 3.4 — distinct branch in same file; serialize edit application)
+
+### 3.4 [x] Wire cancellation site 5/5: `ACTION_POSTPONE_NEXT` handler
+- Satisfies: Requirement "Tick Chain Cancellation" — Scenario "Postpone-next action cancels tick chain"
+- Location: `PluriWaveAlarmReceiver.kt` L57-76 (`ACTION_POSTPONE_NEXT` branch)
+- Add `AlarmScheduler(context).cancelPreNoticeCountdown(alarmId)` BEFORE the call to `AlarmScheduler(context).postponeNext(alarmId, snoozeMinutes)` (L59) — postpone transitions into snooze, where snooze-countdown takes over per the mutual-exclusivity invariant
+- Parallel-safe: YES (with 3.3 — distinct branch in same file; serialize edit application)
+
+### 3.5 [x] [VERIFY] Code-inspect receiver changes
+- Inspection checklist:
+  - [x] `showPreNoticeNotification` computes `remaining` exactly once and reuses that single value for both notification text and the `armNextPreNoticeCountdownTick` call (no second `System.currentTimeMillis()` read causing drift)
+  - [x] `ACTION_PRE_NOTICE` branch results in a call to `AlarmScheduler(context).armNextPreNoticeCountdownTick(...)` after the notification is posted
+  - [x] `ACTION_SKIP_NEXT` branch calls `cancelPreNoticeCountdown(alarmId)` BEFORE `skipNext(alarmId)`
+  - [x] `ACTION_POSTPONE_NEXT` branch calls `cancelPreNoticeCountdown(alarmId)` BEFORE `postponeNext(alarmId, snoozeMinutes)`
+  - [x] Old floor-based `computeRemainingMinutes()` is no longer used for pre-notice display — replaced in place with ceil-based logic (kept as the single computation function, now ceiling-rounded, still the only call site for pre-notice remaining-minutes)
+  - [x] No new `ACTION_*` constant added to the `companion object` (L231+)
+- Parallel-safe: NO — gate before section 4
+
+## 4. Full 5-Site Cancellation Cross-Check (Sequential, spans both files)
+
+### 4.1 [x] [VERIFY] Enumerate and confirm all 5 cancellation sites are wired
+This is the change's single highest-risk item per the design's "CRITICAL GOTCHA" — list each site explicitly and confirm:
+
+1. [x] `AlarmScheduler.cancelAlarm(id)` (L554-568 region) — calls `cancelPreNoticeCountdown(id)` (task 2.1)
+2. [x] `AlarmScheduler.scheduleSpec` no-next-trigger branch (L87-93 region) — calls `cancelPreNoticeCountdown(spec.id)` (task 2.2)
+3. [x] `AlarmScheduler.schedulePreNotice` snooze-transition branch (L140-144 region) — calls `cancelPreNoticeCountdown(spec.id)` (task 2.3)
+4. [x] `PluriWaveAlarmReceiver` `ACTION_SKIP_NEXT` handler (L77-92 region) — calls `cancelPreNoticeCountdown(alarmId)` (task 3.3)
+5. [x] `PluriWaveAlarmReceiver` `ACTION_POSTPONE_NEXT` handler (L57-76 region) — calls `cancelPreNoticeCountdown(alarmId)` (task 3.4)
+
+- Confirm via `grep -rn "cancelPreNoticeCountdown" android/app/src/main/kotlin/es/freetimelab/pluriwave/` that the count is exactly: 1 declaration (`AlarmScheduler.kt`) + 5 call sites (3 in `AlarmScheduler.kt`, 2 in `PluriWaveAlarmReceiver.kt`) = 6 total matches
+- Confirm both `armNextPreNoticeCountdownTick` and `cancelPreNoticeCountdown` resolve `requestCode` through `AlarmScheduler`'s own `requestCode(id, slot) = 31 * id.hashCode() + slot` — re-confirm this did NOT silently get called via `PluriWaveAlarmReceiver`'s `47 * id.hashCode() + slot` formula anywhere (that would make arm/cancel PendingIntents mismatch and leak the chain)
+- Parallel-safe: NO — single gating checkpoint, blocks section 5
+
+## 5. Manual / Device QA (Sequential, requires emulator or physical device — no automated harness available)
+
+### 5.1 [MANUAL QA] Happy-path countdown on real/emulated device
+- Satisfies: Proposal Success Criteria "Pre-notice updates each minute 29->1 with device idle/screen-off"
+- Schedule a test alarm ~3-5 minutes out (shrink the 30-min window for practical testing by temporarily adjusting `PRE_NOTICE_MILLIS` constant value locally, or schedule far enough out and observe the last few ticks before fire)
+- Confirm notification updates in place (same notification ID, no duplicate entries) each minute boundary
+- Parallel-safe: NO
+
+### 5.2 [MANUAL QA] Self-stop at final minute, fire alarm takes over
+- Satisfies: Requirement "Self-Stop at Final Minute"
+- Confirm no `ACTION_PRE_NOTICE` tick fires when `remaining <= 1`; confirm the real `setAlarmClock` fire alarm rings on schedule
+- Parallel-safe: YES (with 5.3, 5.4 — independent device sessions, but practically run sequentially on one test device)
+
+### 5.3 [MANUAL QA] Skip/Postpone/Snooze-transition tear down chain, no orphaned alarm
+- Satisfies: Requirement "Tick Chain Cancellation" (all 5 scenarios), Proposal Success Criteria "Skip-next/postpone-next cancel the tick chain", "Snooze transition cancels pre-notice tick chain; no double-notification"
+- Trigger skip, postpone, and snooze mid-chain on separate test runs; confirm via `adb shell dumpsys alarm | grep pluriwave` (or logcat `alarm.snoozeCountdown` / `alarm.schedule preNotice` tags) that no stale `ACTION_PRE_NOTICE` slot-9 PendingIntent remains armed after each transition
+- Parallel-safe: YES (with 5.2, 5.4)
+
+### 5.4 [MANUAL QA] Doze-delayed tick jumps forward, does not crash/loop
+- Satisfies: Requirement "Self-Healing Minute Computation" — Scenario "Missed tick self-heals by jumping, not crashing"
+- Use `adb shell dumpsys deviceidle force-idle` (or equivalent Doze simulation) to delay a tick; confirm the next tick recomputes remaining minutes from wall clock and displays a forward jump (e.g. 15 -> 12) rather than a stale or negative value
+- Parallel-safe: YES (with 5.2, 5.3)
+
+### 5.5 [MANUAL QA] Snooze-countdown regression check
+- Satisfies: Proposal Success Criteria "Snooze countdown unchanged (no regression)"
+- Run the existing snooze-countdown flow (snooze an alarm, observe per-minute countdown) and confirm it behaves identically to pre-change behavior — slot 8 / `ACTION_SNOOZE_COUNTDOWN` path untouched by this change
+- Parallel-safe: YES (with 5.2, 5.3, 5.4)
+
+## Dependency Graph
+
+```
+1.1 -> 1.2 -> 1.3 -> 1.4 [VERIFY GATE]
+                        |
+                        v
+        2.1, 2.2, 2.3 (parallel design, serial apply) -> 2.4 [VERIFY GATE]
+                        |
+                        v
+        3.1 -> 3.2 -> 3.3, 3.4 (parallel design, serial apply) -> 3.5 [VERIFY GATE]
+                        |
+                        v
+                4.1 [VERIFY GATE — 5-site cross-check]
+                        |
+                        v
+        5.1 -> 5.2, 5.3, 5.4, 5.5 (parallel manual QA sessions)
+```
+
+No task in this change can run fully independently of the others — both files are small and the two new functions (`armNextPreNoticeCountdownTick`, `cancelPreNoticeCountdown`) are shared dependencies for every cancellation-site task and the receiver re-arm task. "Parallel-safe" above means parallel in *review/design reasoning*; the actual file edits should still be applied serially to avoid diff collisions in two small files.
+
+## Review Workload Forecast
+
+- Files touched: 2 (`AlarmScheduler.kt`, `PluriWaveAlarmReceiver.kt`)
+- Estimated changed lines: ~90-130 (2 new functions ~25-35 lines each in `AlarmScheduler.kt`; 5 small call-site insertions of 1-2 lines each; receiver re-arm wiring + ceilMinutes swap ~15-25 lines)
+- **400-line budget risk: Low** — well under threshold, single small PR is appropriate
+- **Chained PRs recommended: No**
+- **Decision needed before apply: No** — proceed with `delivery_strategy: ask-on-risk` as a single PR; no risk threshold triggered
+- Primary review focus: the requestCode formula (slot 9, `AlarmScheduler`'s `31*hash+slot`, NOT the receiver's `47*hash+slot`) and the 5-site cancellation cross-check (section 4.1) — these are the two failure modes called out explicitly in the design as silent/non-crashing (PendingIntent mismatch leaks a repeating alarm with no visible error)
+- Suggested reviewer pass order: section 1 (engine) first in isolation, then section 4.1's grep-based cross-check as the acceptance gate before merging, manual QA (section 5) can follow merge if device access is constrained at review time but MUST complete before this change is considered done

openspec/changes/archive/2026-06-30-pre-notice-live-countdown/verify-report.md

@@ -0,0 +1,71 @@
+# Verify Report: Pre-notice Live Countdown
+
+Change: pre-notice-live-countdown
+Mode: Kotlin-only, code-inspection verification (no Kotlin test harness in repo; Strict TDD applies to Dart/Flutter only and does not govern this change)
+Verdict: PASS WITH WARNINGS
+
+## Completeness (tasks.md cross-check)
+
+| Section | Status | Notes |
+|---|---|---|
+| 1. AlarmScheduler.kt core tick engine (1.1-1.4) | DONE | Both functions present, public, correct formula |
+| 2. Wire 3 scheduler-side cancel sites (2.1-2.4) | DONE | All 3 confirmed by line inspection |
+| 3. Receiver re-arm + ceil + 2 cancel sites (3.1-3.5) | DONE | Single remaining-compute reused for text+arm |
+| 4. Full 5-site cross-check (4.1) | DONE | grep confirms exactly 6 matches |
+| 5. Manual/device QA (5.1-5.5) | NOT RUN | Explicitly out of apply scope, flagged below, not a CRITICAL blocker for this SDD cycle |
+
+## Build/Analysis Evidence
+
+- flutter analyze: No issues found! (ran in 2.5s). Zero issues, confirms no Dart-side regression from this Kotlin-only change.
+- flutter build was correctly NOT run (per project instructions).
+- git status / git diff --stat: only AlarmScheduler.kt (+70/-2) and PluriWaveAlarmReceiver.kt (+21/-3) modified. 91 lines total, matches tasks forecast (about 90-130) and the 400-line budget (Low risk, confirmed accurate). No Dart/ARB/l10n files touched, confirming the design's Kotlin-only claim.
+- grep -rn cancelPreNoticeCountdown across both files: exactly 6 matches (1 declaration AlarmScheduler.kt:531 + 5 call sites AlarmScheduler.kt:93,143,631 and PluriWaveAlarmReceiver.kt:59,80). Matches the design/tasks claim exactly.
+- grep -n requestCode(id, 9): both occurrences (AlarmScheduler.kt:498 arm, :534 cancel) live exclusively in AlarmScheduler.kt, never in the receiver. Confirms both resolve through AlarmScheduler.requestCode = 31*hash+slot (L934), never the receiver's separate 47*hash+slot (L244). This is the design's single highest-risk correctness gate and it is verifiably satisfied.
+
+## Spec Compliance Matrix (8 requirements / 16 scenarios)
+
+| # | Requirement | Scenario | Status | Evidence |
+|---|---|---|---|---|
+| 1 | First Pre-Notice Post | First post at T-30min | PASS | schedulePreNotice unchanged (L139-191), fires ACTION_PRE_NOTICE via setExactAndAllowWhileIdle at T-30min |
+| 2 | Per-Minute Tick Re-Arm | Tick re-arms next minute | PASS | armNextPreNoticeCountdownTick L484-519: reuses ACTION_PRE_NOTICE (L500), nextBoundary = triggerAtMillis-(remaining-1)*60000 (L495), slot 9 (L498) |
+| 2 | Per-Minute Tick Re-Arm | Tick updates notification content | PASS | Same notificationIdForAlarm(alarmId) (receiver L197) + FLAG_UPDATE_CURRENT (L155). Update in place, no duplicate |
+| 3 | Self-Healing Minute Computation | Normal tick sequence | PASS | computeRemainingMinutes (receiver L224-225) recomputes from wall clock each call via ceil formula, no stored counter |
+| 3 | Self-Healing Minute Computation | Missed tick self-heals by jumping | PASS by construction | Same recompute-from-wall-clock design as snooze-countdown (shipped pattern); UNTESTED at runtime, Doze behavior requires device (Task 5.4, not run) |
+| 4 | Self-Stop at Final Minute | Chain stops before final minute | PASS | armNextPreNoticeCountdownTick L494: if remaining less-equal 1L return before arming |
+| 5 | Consistent Rounding via ceilMinutes | Rounding matches snooze countdown | PASS | Receiver L224-225 formula identical to AlarmScheduler.ceilMinutes L620-621 |
+| 6 | Tick Chain Cancellation | Full alarm cancellation tears down chain | PASS | cancelAlarm L631 calls cancelPreNoticeCountdown(id) |
+| 6 | Tick Chain Cancellation | No-next-trigger reschedule cancels chain | PASS | scheduleSpec L93 |
+| 6 | Tick Chain Cancellation | Snooze transition cancels chain | PASS | schedulePreNotice L143 |
+| 6 | Tick Chain Cancellation | Skip-next cancels chain | PASS | Receiver L80, BEFORE skipNext (L81). Correct ordering |
+| 6 | Tick Chain Cancellation | Postpone-next cancels chain | PASS | Receiver L59, BEFORE postponeNext (L60). Correct ordering |
+| 7 | Notification ID Reuse / Mutual Exclusivity | Pre-notice and snooze-countdown never concurrent | PASS | scheduleSpec L123-135 branches exclusively on snoozeUntilMillis not null |
+| 7 | Notification ID Reuse / Mutual Exclusivity | Notification updates in place | PASS | Shared notificationIdForAlarm(id), FLAG_UPDATE_CURRENT semantics |
+
+14/14 statically-verifiable scenarios PASS. 2 scenarios (Doze-delayed jump, and device-level confirmation of in-place notification updates) are PASS-by-construction/code-inspection only; true runtime confirmation requires the not-yet-run manual QA in tasks.md section 5.
+
+## Design Coherence
+
+| Design Decision | Code Match |
+|---|---|
+| Reuse ACTION_PRE_NOTICE, no new action constant | Confirmed, no new ACTION_PRE_NOTICE_COUNTDOWN style constant added |
+| Slot 9 via AlarmScheduler.requestCode (31*hash+slot) | Confirmed, both arm and cancel |
+| armNextPreNoticeCountdownTick and cancelPreNoticeCountdown both public | Confirmed, no private modifier, declared with bare fun |
+| Arm/cancel ownership both in AlarmScheduler | Confirmed |
+| Receiver computes remaining once, reuses for text + arm call | Confirmed (L143, then passed to armNextPreNoticeCountdownTick at L214 without re-reading the clock) |
+| Kotlin-only change, no Dart/ARB changes | Confirmed via git status |
+
+One documented deviation from reuse ceilMinutes() as literally read: the design resolution says the receiver duplicates the formula rather than calling into AlarmScheduler.ceilMinutes() (class-private), because promoting it to shared/public surface was explicitly rejected to avoid scope creep. tasks.md 3.2 documents this tradeoff and the implementation matches it exactly (formula duplicated, not shared). Not a deviation from what was actually decided, flagged as SUGGESTION only.
+
+## Issues
+
+CRITICAL: None.
+
+WARNING:
+1. Manual/device QA (tasks.md section 5.1-5.5) has not been executed. This covers: happy-path 29-to-1 countdown on a real/emulated device, self-stop confirmation at final minute, skip/postpone/snooze-transition teardown via adb dumpsys alarm, Doze-delayed jump behavior, and snooze-countdown regression check. This was explicitly out of scope for the apply phase per the tasks artifact, but it is a real gap before this change can be considered fully done. Recommend running it before/shortly after merge, not blocking the SDD cycle itself.
+
+SUGGESTION:
+1. ceilMinutes formula is duplicated (once in AlarmScheduler as a private function, once inline in PluriWaveAlarmReceiver.computeRemainingMinutes). This was a deliberate, documented tradeoff in the design/tasks to avoid widening AlarmScheduler's public surface. Low risk since both formulas are simple one-liners and now textually identical, but a future change to one without the other would silently desync rounding behavior between pre-notice and snooze-countdown. Consider a tiny shared top-level internal fun ceilMinutes(deltaMillis: Long): Long if a third consumer ever appears.
+
+## Final Verdict
+
+PASS WITH WARNINGS. All 4 in-scope implementation/code-inspection sections (1-4) are complete and correct. The critical correctness gate (slot 9 via the same AlarmScheduler.requestCode formula for both arm and cancel) is verifiably satisfied by direct code inspection; this was the design's top identified risk and it does not manifest. flutter analyze is clean. Diff scope matches the forecast exactly (Kotlin-only, 91 lines). The only open item is manual device QA (section 5), which was always out of scope for the automated apply/verify cycle and should be tracked as a follow-up, not treated as blocking archive.