-- Agent Memory plugin initial migration: creates agent_memories table with pgvector
CREATE TABLE IF NOT EXISTS agent_memories (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL,
    agent_id UUID NOT NULL,
    memory_type VARCHAR(50) NOT NULL DEFAULT 'fact',
    content TEXT NOT NULL,
    embedding vector(768),
    owner_id UUID REFERENCES users(id) ON DELETE SET NULL,
    deleted_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS ix_agent_memories_tenant_agent ON agent_memories(tenant_id, agent_id);
CREATE INDEX IF NOT EXISTS ix_agent_memories_tenant_type ON agent_memories(tenant_id, memory_type);
CREATE INDEX IF NOT EXISTS ix_agent_memories_agent_id ON agent_memories(agent_id);

-- HNSW index for fast vector similarity search on agent_memories.embedding
CREATE INDEX IF NOT EXISTS ix_agent_memories_embedding_hnsw ON agent_memories USING hnsw (embedding vector_cosine_ops) WITH (m = 16, ef_construction = 200);