ML-154: add early platform detection for SQLite extensions

backlog/tasks/ml-154 - Add-early-platform-detection-in-runtime.exs-for-SQLite-extensions.md

@@ -0,0 +1,38 @@
+---
+id: ML-154
+title: Add early platform detection in runtime.exs for SQLite extensions
+status: Done
+assignee: []
+created_date: '2026-04-30 10:48'
+updated_date: '2026-04-30 12:37'
+labels:
+  - robustness
+  - sqlite
+dependencies: []
+references:
+  - lib/music_library/repo.ex
+  - config/runtime.exs
+priority: low
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+`MusicLibrary.Repo.extension_path/1` raises `"Unsupported OS or platform"` when run on an unrecognised OS/architecture combination. This is called at startup via `config/runtime.exs` to resolve paths for `unicode` and `vec0` SQLite extensions.
+
+Instead of silently degrading (which would cause confusing downstream failures), add early detection:
+
+1. Add `MusicLibrary.Repo.supported_platform?/0` that returns a boolean
+2. In `config/runtime.exs`, check this BEFORE the `load_extensions` config block
+3. If unsupported, raise with a helpful message listing supported platforms and the detected OS/arch
+
+The existing `raise` in `extension_path/1` stays as a defensive fallback (should not be reached if runtime.exs catches it first).
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [x] #1 #1 `Repo.supported_platform?/0` returns true/false based on OS/arch
+- [x] #2 #2 `config/runtime.exs` checks `supported_platform?/0` before loading extensions and raises with a helpful message on unsupported platforms
+- [x] #3 #3 Existing supported platforms (darwin-amd64, darwin-arm64, linux-amd64, linux-arm64) continue to load extensions correctly
+- [x] #4 #4 `extension_path/1` raise stays as a defensive fallback
+<!-- AC:END -->

backlog/tasks/ml-154 - Replace-raise-with-Logger.warning-in-Repo.extension_path-for-unsupported-platforms.md

@@ -1,40 +0,0 @@
----
-id: ML-154
-title: >-
-  Replace raise with Logger.warning in Repo.extension_path for unsupported
-  platforms
-status: To Do
-assignee: []
-created_date: '2026-04-30 10:48'
-labels:
-  - robustness
-  - sqlite
-dependencies: []
-references:
-  - lib/music_library/repo.ex
-  - config/runtime.exs
-priority: low
----
-
-## Description
-
-<!-- SECTION:DESCRIPTION:BEGIN -->
-`MusicLibrary.Repo.extension_path/1` (`lib/music_library/repo.ex`) derives the platform from `:erlang.system_info(:system_architecture)` and raises `"Unsupported OS or platform"` if the combination isn't recognised.
-
-This is called at startup in `config/runtime.exs` to load SQLite extensions (`unicode`, `vec0`). If deployed on an unexpected architecture, the app crashes before serving any traffic.
-
-Change the function to:
-1. Log a warning with the detected OS/arch details
-2. Return `nil` (or an `{:error, reason}` tuple)
-3. Update `config/runtime.exs` and any other callers to handle the nil/error case gracefully — skipping extension loading but allowing the app to start
-
-Features that depend on the extensions (FTS5 unicode support, vector similarity search) will degrade but the app remains available.
-<!-- SECTION:DESCRIPTION:END -->
-
-## Acceptance Criteria
-<!-- AC:BEGIN -->
-- [ ] #1 `Repo.extension_path/1` logs a warning and returns nil instead of raising for unsupported platforms
-- [ ] #2 `config/runtime.exs` handles a nil return by skipping extension loading for that extension
-- [ ] #3 App can start on an unsupported platform without crashing
-- [ ] #4 Existing supported platforms (darwin-amd64, darwin-arm64, linux-amd64, linux-arm64) continue to load extensions correctly
-<!-- AC:END -->