Reduce Android realtime heartbeat noise

docs/superpowers/plans/2026-04-10-android-realtime-noise-reduction.md

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+# Android Realtime Noise Reduction Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Reduce Android realtime stutter by suppressing heartbeat-only conversation refresh events and avoiding full reloads from initial SSE context snapshots.
+
+**Architecture:** Keep the existing SSE endpoint and Android `BossRealtimeClient`. Narrow event production in `upsertDeviceHeartbeat` and narrow Android root-page event consumption in `MainActivity`.
+
+**Tech Stack:** Next.js App Router backend, TypeScript `node:test`, Android Java native client, Server-Sent Events.
+
+---
+
+### Task 1: Lock Heartbeat Event Contract
+
+**Files:**
+- Create: `tests/device-heartbeat-event-noise.test.ts`
+- Modify: `src/lib/boss-data.ts`
+
+- [ ] **Step 1: Write the failing unchanged-heartbeat test**
+
+```ts
+assert.deepEqual(events.map((event) => event.event), ["devices.updated"]);
+```
+
+- [ ] **Step 2: Run the test and verify it fails**
+
+Run: `npx tsx --test tests/device-heartbeat-event-noise.test.ts`
+
+Expected: unchanged heartbeat currently emits both `devices.updated` and `conversation.updated`.
+
+- [ ] **Step 3: Suppress unchanged heartbeat conversation refreshes**
+
+Track whether heartbeat import/candidate state actually changes the conversation drawer. Always publish `devices.updated`; publish `conversation.updated` only when the drawer changes.
+
+- [ ] **Step 4: Run the focused test and verify it passes**
+
+Run: `npx tsx --test tests/device-heartbeat-event-noise.test.ts`
+
+Expected: unchanged heartbeat emits only `devices.updated`.
+
+### Task 2: Keep Import Changes Visible
+
+**Files:**
+- Modify: `tests/device-heartbeat-event-noise.test.ts`
+- Modify: `src/lib/boss-data.ts`
+
+- [ ] **Step 1: Write the changed-candidates test**
+
+```ts
+assert.deepEqual(
+  events.map((event) => [event.event, event.payload.deviceId, event.payload.note]),
+  [
+    ["devices.updated", "noise-device-b", undefined],
+    ["conversation.updated", "noise-device-b", "device_import.updated"],
+  ],
+);
+```
+
+- [ ] **Step 2: Run the test and verify it fails**
+
+Run: `npx tsx --test tests/device-heartbeat-event-noise.test.ts`
+
+Expected: the event exists before the fix but is too broad and lacks the `device_import.updated` marker.
+
+- [ ] **Step 3: Publish a marked conversation event only for import changes**
+
+Use `note: "device_import.updated"` on the conditional `conversation.updated` heartbeat event.
+
+- [ ] **Step 4: Run the focused test and verify it passes**
+
+Run: `npx tsx --test tests/device-heartbeat-event-noise.test.ts`
+
+Expected: changed candidates publish one marked conversation refresh event.
+
+### Task 3: Avoid Android Initial Snapshot Full Reloads
+
+**Files:**
+- Create: `tests/android-root-realtime-noise.test.ts`
+- Modify: `android/app/src/main/java/com/hyzq/boss/MainActivity.java`
+
+- [ ] **Step 1: Write the failing Android static test**
+
+```ts
+assert.doesNotMatch(
+  source,
+  /"conversation\.context_indicator\.updated"[\s\S]{0,120}return true;/,
+);
+```
+
+- [ ] **Step 2: Run the test and verify it fails**
+
+Run: `npx tsx --test tests/android-root-realtime-noise.test.ts`
+
+Expected: `MainActivity` currently returns `true` for the context snapshot event.
+
+- [ ] **Step 3: Ignore context snapshot as a full reload trigger**
+
+Change the context snapshot branch to return `false` in `shouldRefreshConversationsTab`.
+
+- [ ] **Step 4: Run the focused test and verify it passes**
+
+Run: `npx tsx --test tests/android-root-realtime-noise.test.ts`
+
+Expected: Android root no longer treats initial snapshot events as full reload triggers.
+
+### Task 4: Verify And Ship
+
+**Files:**
+- Verify: `src/lib/boss-data.ts`
+- Verify: `android/app/src/main/java/com/hyzq/boss/MainActivity.java`
+- Verify: `tests/device-heartbeat-event-noise.test.ts`
+- Verify: `tests/android-root-realtime-noise.test.ts`
+
+- [ ] **Step 1: Run realtime and device regression tests**
+
+Run: `npx tsx --test tests/device-heartbeat-event-noise.test.ts tests/android-root-realtime-noise.test.ts tests/device-gui-cli-capabilities.test.ts tests/device-execution-conflict.test.ts tests/conversation-home-items.test.ts tests/realtime-refresh-utils.test.ts tests/project-scoped-realtime-refresh.test.ts tests/android-folder-realtime-refresh.test.ts`
+
+Expected: all selected tests pass.
+
+- [ ] **Step 2: Run project gates**
+
+Run: `npm run lint`
+
+Expected: lint exits 0.
+
+Run: `npm run build`
+
+Expected: production build exits 0.
+
+- [ ] **Step 3: Build and install Android release APK**
+
+Run: `cd android && ./gradlew assembleRelease`
+
+Expected: release APK builds successfully.
+
+Run: `adb -s <wireless-device-id> install -r android/app/build/outputs/apk/release/app-release.apk`
+
+Expected: install returns `Success`.