diff --git a/.daemon/logs/signet-2026-02-22.log b/.daemon/logs/signet-2026-02-22.log
index 6094c6017..e4bf441a3 100644
--- a/.daemon/logs/signet-2026-02-22.log
+++ b/.daemon/logs/signet-2026-02-22.log
@@ -1619,3 +1619,14 @@
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diff --git a/memory/2026-02-22-umap-performance-refactoring-setup.md b/memory/2026-02-22-umap-performance-refactoring-setup.md
new file mode 100644
index 000000000..05349e0f6
--- /dev/null
+++ b/memory/2026-02-22-umap-performance-refactoring-setup.md
@@ -0,0 +1,13 @@
+# 2026-02-22 Session Notes
+
+## UMAP Performance Refactoring Setup
+
+Backend-worker agent was assigned four core tasks for the umap-perf team: creating a database migration for UMAP caching, building a server-side projection module, adding an API endpoint, and implementing cache invalidation hooks.
+
+Task #1 was claimed and read: a new migration (010-umap-cache.ts) must create a umap_cache table with dimensions (INTEGER), embedding_count (INTEGER), payload (TEXT), and created_at (TEXT) columns. The migration should follow the existing pattern from 009-summary-jobs.ts and be registered in packages/core/src/migrations/index.ts.
+
+The refactoring moves UMAP projection computation from client-side (dashboard) to server-side (daemon), pre-computing 2D/3D coordinates that the dashboard fetches via API instead of calculating them locally. This requires understanding the db-accessor pattern with getDbAccessor().withReadDb() and withWriteDb() methods, along with blob-to-vector conversions used elsewhere in daemon.ts.
+
+Planned endpoint location: immediately after /api/embeddings/status in daemon.ts. Cache invalidation hooks must be added to syncVecInsert, syncVecDeleteBySourceId, syncVecDeleteBySourceExceptHash, and syncVecDeleteByEmbeddingIds in db-helpers.ts.
+
+Dependency chain: tasks #1-4 must complete before dashboard changes (#5-6), which then unblock the final build/typecheck (#7).
\ No newline at end of file
diff --git a/memory/memories.db-wal b/memory/memories.db-wal
index 80324f778..4215a8c12 100644
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