Changeset 0.7.2 (#40)

server/database/migrations/014_notes.sql

@@ -0,0 +1,50 @@
+-- 014_notes.sql — Notes table with full-text search
+--
+-- Notes are user-scoped persistent documents. The LLM can create, search,
+-- and update them via built-in tools (note_create, note_search, etc.).
+-- Full-text search uses PostgreSQL tsvector — zero additional infrastructure.
+--
+-- DROP first: if a previous deployment created an incomplete version of
+-- this table (e.g. missing search_vector), IF NOT EXISTS would skip and
+-- the indexes/trigger would fail. Safe because 014 was never recorded
+-- in schema_migrations — any existing data is from a failed attempt.
+
+DROP TABLE IF EXISTS notes CASCADE;
+
+CREATE TABLE notes (
+    id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id         UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    title           VARCHAR(500) NOT NULL,
+    content         TEXT DEFAULT '',
+    folder_path     TEXT DEFAULT '/',
+    tags            TEXT[] DEFAULT '{}',
+    metadata        JSONB DEFAULT '{}',
+    source_channel_id UUID REFERENCES channels(id) ON DELETE SET NULL,
+    search_vector   TSVECTOR,
+    created_at      TIMESTAMP DEFAULT NOW(),
+    updated_at      TIMESTAMP DEFAULT NOW()
+);
+
+CREATE INDEX idx_notes_user ON notes(user_id);
+CREATE INDEX idx_notes_search ON notes USING GIN(search_vector);
+CREATE INDEX idx_notes_folder ON notes(user_id, folder_path);
+CREATE INDEX idx_notes_tags ON notes USING GIN(tags);
+CREATE INDEX idx_notes_updated ON notes(user_id, updated_at DESC);
+
+-- Auto-update search vector from title + content
+CREATE OR REPLACE FUNCTION notes_search_update_fn()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.search_vector :=
+        setweight(to_tsvector('pg_catalog.english', COALESCE(NEW.title, '')), 'A') ||
+        setweight(to_tsvector('pg_catalog.english', COALESCE(NEW.content, '')), 'B');
+    NEW.updated_at := NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Drop first to allow re-run
+DROP TRIGGER IF EXISTS notes_search_update ON notes;
+CREATE TRIGGER notes_search_update
+    BEFORE INSERT OR UPDATE OF title, content ON notes
+    FOR EACH ROW EXECUTE FUNCTION notes_search_update_fn();