ML-168.4: perform async messages audit

backlog/tasks/ml-169.4 - Phase-1-Async-message-audit-LiveComponent-→-Parent-handle_info-coverage.md

@@ -1,18 +1,16 @@
 ---
 id: ML-169.4
 title: "Phase 1: Async message audit (LiveComponent → Parent handle_info coverage)"
-status: To Do
+status: Done
 assignee: []
 created_date: "2026-05-08 08:59"
-updated_date: "2026-05-11 06:46"
+updated_date: "2026-05-19 06:35"
 labels:
   - audit
   - ready
 dependencies: []
 references:
-  - lib/music_library_web/components/release.ex
-  - lib/music_library_web/live/collection_live/show.ex
-  - lib/music_library_web/live/scrobble_live/release_show.ex
+  - audits/phase1-async-message-coverage
 parent_task_id: ML-169
 priority: medium
 ---
@@ -31,9 +29,63 @@ Pre-flagged concern: the Release component renders in CollectionLive.Show with `
 
 <!-- AC:BEGIN -->
 
-- [ ] #1 Every send(self(), ...) call site in lib/music_library_web/components/ matched against handle_info in its consumer LiveViews
-- [ ] #2 Release component's {:release*loaded, *} message traced end-to-end in CollectionLive.Show context — either confirmed harmless or flagged as bug
-- [ ] #3 All 11 message-producing components verified: RecordForm, AddRecord, Chat, Release, ArtistLive.Form, RecordSetLive.Form, RecordSetLive.RecordPicker, ScrobbleRulesLive.Form, ScrobbledTracksLive.Form, OnlineStoreTemplateLive.Form, ScrobbleRulePicker
-- [ ] #4 Any send/2 calls using non-{**MODULE**, \_} patterns found and verified
-- [ ] #5 Findings report written as a Backlog.md document with file:line references, severity ratings, and fix recommendations
+- [x] #1 Every send(self(), ...) call site in lib/music_library_web/components/ matched against handle_info in its consumer LiveViews
+- [x] #2 Release component's {:release*loaded, *} message traced end-to-end in CollectionLive.Show context — either confirmed harmless or flagged as bug
+- [x] #3 All 11 message-producing components verified: RecordForm, AddRecord, Chat, Release, ArtistLive.Form, RecordSetLive.Form, RecordSetLive.RecordPicker, ScrobbleRulesLive.Form, ScrobbledTracksLive.Form, OnlineStoreTemplateLive.Form, ScrobbleRulePicker
+- [x] #4 Any send/2 calls using non-{**MODULE**, \_} patterns found and verified
+- [x] #5 Findings report written as a Backlog.md document with file:line references, severity ratings, and fix recommendations
 <!-- AC:END -->
+
+## Implementation Notes
+
+<!-- SECTION:NOTES:BEGIN -->
+
+## Audit Execution Notes
+
+### Method
+
+- Grepped all `send(self(), ...)` call sites in `lib/music_library_web/components/` and `lib/music_library_web/live/` (excluding test files)
+- Grepped all `handle_info` clauses in `lib/music_library_web/live/`
+- Cross-referenced every `send(self())` call site against parent LiveView `handle_info` clauses
+- Verified component render locations to confirm the consumer LiveView is the correct parent
+- Verified all module aliases match (e.g., AddRecord = MusicLibraryWeb.Components.AddRecord)
+
+### Pre-flagged concern: Release component in CollectionLive.Show
+
+**RESULT: HARMLESS** — The `notify_release_loaded/2` function in release.ex checks `socket.assigns[:on_release_loaded]`. When nil (CollectionLive.Show doesn't set it), the function returns `:ok` without calling `send/2`. No dead message, no missing handler. The Release component is rendered at line 304 in CollectionLive.Show with `show_print?={true}` and `timezone={@timezone}` but no `on_release_loaded` attribute, which is intentional.
+
+### Key findings
+
+- 11/11 components fully verified with 0 missing handlers
+- 3 non-MODULE patterns found, all verified safe
+- Release component's dynamic tag pattern works but could benefit from type-safe refactoring (low priority)
+- RecordSetLive.Show correctly only handles `:updated` since it renders Form only in `:edit` mode
+
+Full report at @audits/phase1-async-message-coverage
+
+<!-- SECTION:NOTES:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+## Result: PASS — No missing handlers or dead messages found
+
+### Coverage
+
+- **14 `send(self(), ...)` call sites** across 11 components all matched to corresponding `handle_info` clauses
+- **0 missing handlers**, **0 dead messages**
+- **3 non-`{__MODULE__, _}` patterns** all verified safe:
+  1. Release component dynamic tag — safe, nil-guarded
+  2. ScrobbleLive.Index self-send — has matching handler
+  3. ShowToast hook — standard LiveView attach_hook pattern
+
+### Pre-flagged concern resolved
+
+Release component in CollectionLive.Show: **HARMLESS**. The `notify_release_loaded/2` checks `socket.assigns[:on_release_loaded]` and skips sending when nil. CollectionLive.Show intentionally doesn't set `on_release_loaded`.
+
+### Full report
+
+Documented at `audits/phase1-async-message-coverage` with file:line references, severity ratings, and all 11 components verified.
+
+<!-- SECTION:FINAL_SUMMARY:END -->