docs(audiobooks): implementation plan sub-plan 5 (podcasts)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/superpowers/plans/2026-05-24-audiobooks-absorption-5-podcasts.md

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+# Audiobooks Absorption — Sub-plan 5: Podcasts (RSS feed refresher)
+
+**Goal:** Port the plugin's `podcastfeed` package as a first-party scheduled task in silo, so RSS-subscribed podcasts get their episode lists kept up to date.
+
+**Source plugin:** `/opt/silo_plugins/silo-plugin-audiobooks/internal/podcastfeed/refresher.go` (353 LOC) + `refresher_test.go` (295 LOC)
+
+## Tasks
+
+### Task 1: Port the refresher package
+- Copy `refresher.go` + `refresher_test.go` from plugin to `/opt/silo-server/internal/audiobooks/podcastfeed/`
+- Update imports (drop plugin SDK; use silo's `pgxpool` + `log/slog`)
+- Rewrite SQL queries against silo's `podcast_feeds` table (created in sub-plan 1 migration 140), `media_items` (type='podcast'), and `episodes`
+- Drop the plugin's `presentation_libraries` reference; subscriptions are tracked by `podcast_feeds.media_item_id`
+
+### Task 2: Wire as scheduled task
+- Discovery D8 documented silo's task registration pattern: `taskMgr.Register(tasks.NewXxxTask(...))` in `cmd/silo/main.go`
+- Add `tasks.NewSyncPodcastFeedsTask(refresher)` and register
+- Default interval: 10 minutes (matches plugin)
+
+### Task 3: ABS podcast endpoints (optional)
+The plugin's `abs/podcast.go` + `abs/rss_feed_handler.go` + `abs/podcast_handler.go` expose:
+- `GET /abs/api/libraries/{id}/podcasts/{podcastId}/episodes/{episodeId}`
+- `POST /abs/api/libraries/{id}/podcasts` (add subscription)
+- `GET /abs/api/podcast/feeds` (admin RSS feed browse)
+
+If reach is required for ABS clients, port these. Otherwise stub 501 and ship. For initial release, stub.
+
+### Task 4: Build + smoke
+- Verify scheduled task registers on startup (`docker logs` shows the task)
+- Verify nothing else breaks
+
+## Risks
+
+- Plugin's RSS parser may depend on third-party packages not in silo's go.mod. Check go.mod after porting and add if needed.
+- `episodes` table in silo has a different shape than the plugin assumed. Re-read the plugin's INSERT statements and adapt.