Changeset 0.18.0 (#79)

server/database/migrations/sqlite/003_v0180_memories.sql

@@ -0,0 +1,61 @@
+-- v0.18.0: Memory System (SQLite)
+--
+-- Long-term memory across conversations, with scope-aware isolation.
+-- Three scopes: user (personal), persona (shared), persona_user (per-user-per-persona).
+
+-- =========================================
+-- 1. Memories Table
+-- =========================================
+
+CREATE TABLE IF NOT EXISTS memories (
+    id                TEXT PRIMARY KEY,
+    scope             TEXT NOT NULL CHECK (scope IN ('user', 'persona', 'persona_user')),
+
+    -- Owner resolution:
+    --   user scope:         owner_id = user_id,   user_id = NULL
+    --   persona scope:      owner_id = persona_id, user_id = NULL
+    --   persona_user scope: owner_id = persona_id, user_id = user_id
+    owner_id          TEXT NOT NULL,
+    user_id           TEXT,
+
+    key               TEXT NOT NULL,
+    value             TEXT NOT NULL,
+    source_channel_id TEXT,
+    confidence        REAL NOT NULL DEFAULT 1.0,
+    status            TEXT NOT NULL DEFAULT 'active'
+                      CHECK (status IN ('active', 'pending_review', 'archived')),
+
+    -- Embedding stored as JSON array of float64 for app-level cosine similarity
+    embedding         TEXT,
+
+    created_at        TEXT DEFAULT (datetime('now')),
+    updated_at        TEXT DEFAULT (datetime('now'))
+);
+
+-- Primary lookup
+CREATE INDEX IF NOT EXISTS idx_memories_scope_owner
+    ON memories(scope, owner_id, status);
+
+-- Persona+user lookup
+CREATE INDEX IF NOT EXISTS idx_memories_persona_user
+    ON memories(owner_id, user_id);
+
+-- Deduplication: prevent saving the same key twice for the same scope/owner/user
+CREATE UNIQUE INDEX IF NOT EXISTS idx_memories_unique_key
+    ON memories(scope, owner_id, COALESCE(user_id, '00000000-0000-0000-0000-000000000000'), key);
+
+-- Source channel reference
+CREATE INDEX IF NOT EXISTS idx_memories_source_channel
+    ON memories(source_channel_id);
+
+-- =========================================
+-- 2. Updated-at Trigger
+-- =========================================
+
+CREATE TRIGGER IF NOT EXISTS trg_memories_updated_at
+    AFTER UPDATE ON memories
+    FOR EACH ROW
+    WHEN NEW.updated_at = OLD.updated_at
+BEGIN
+    UPDATE memories SET updated_at = datetime('now') WHERE id = NEW.id;
+END;

server/database/migrations/sqlite/004_v0180_memory_phase2.sql

@@ -0,0 +1,22 @@
+-- v0.18.0 Phase 2: Memory Extraction & Embeddings (SQLite)
+
+-- 1. Persona memory configuration
+ALTER TABLE personas ADD COLUMN memory_enabled INTEGER NOT NULL DEFAULT 1;
+ALTER TABLE personas ADD COLUMN memory_extraction_prompt TEXT;
+
+-- 2. No HNSW index for SQLite — app-level cosine similarity used instead.
+
+-- 3. Memory extraction log
+CREATE TABLE IF NOT EXISTS memory_extraction_log (
+    id              TEXT PRIMARY KEY,
+    channel_id      TEXT NOT NULL,
+    user_id         TEXT NOT NULL,
+    last_message_id TEXT NOT NULL,
+    extracted_at    TEXT DEFAULT (datetime('now')),
+    memory_count    INTEGER NOT NULL DEFAULT 0,
+
+    UNIQUE(channel_id, user_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_mem_extract_log_channel
+    ON memory_extraction_log(channel_id);