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+# 2026-02-24 Session Notes
+
+## Embedding Health Check Feature Plan
+
+A coding session focused on planning a unified embedding health check system for the Signet daemon. The feature addresses scattered health signals across multiple endpoints (`/api/embeddings/status`, `/api/repair/embedding-gaps`, `diagnostics.ts`) by introducing a single aggregated endpoint and dashboard UI.
+
+### Architecture
+
+The plan creates a new read-only module `packages/daemon/src/embedding-health.ts` (~200 LOC) following the existing `diagnostics.ts` pattern. It exports `buildEmbeddingHealth()` which synchronously evaluates embedding system health via seven database checks and provider status.
+
+### Seven Health Checks
+
+Each check is a small function with weighted scoring (provider-available: 0.30, coverage: 0.25, dimension-mismatch: 0.15, model-drift: 0.10, null-vectors: 0.08, vec-table-sync: 0.07, orphaned-embeddings: 0.05). Thresholds match diagnostics patterns: ≥0.8 healthy, ≥0.5 degraded, <0.5 unhealthy.
+
+### Implementation Tasks
+
+1. Create `embedding-health.ts` with type definitions and check functions
+2. Register `GET /api/embeddings/health` endpoint in daemon.ts
+3. Add orphan cleanup function to repair-actions.ts
+4. Add API client function to dashboard/api.ts
+5. Build floating health indicator UI in EmbeddingsTab.svelte (collapsed pill + expanded panel)
+
+### Dashboard Integration
+
+A floating health indicator in the top-right corner of the embeddings canvas showing status with color-coded dots (green/amber/red). Expands on click to show all checks with fix hints for failed items. Fetches every 60s using lightweight read-only queries.
+
+### Key Decisions
+
+- Synchronous DB reads only; provider status pre-resolved by caller
+- Duplicate small helper functions locally rather than exposing from diagnostics.ts
+- No external dependencies; follows existing daemon patterns
+- All checks are actionable with clear fix hints for failed states
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