feat(schema): 004 — agents, agent_tokens, conversations, messages

lib/db/migrations/004_agents.sql

@@ -0,0 +1,50 @@
+CREATE TABLE agents (
+  id           uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  slug         text NOT NULL UNIQUE,
+  name         text NOT NULL,
+  kind         text NOT NULL
+               CHECK (kind IN ('claude','ollama','mastra','mcp-client','external')),
+  model        text,
+  persona_path text,
+  capabilities jsonb NOT NULL DEFAULT '{"read":true,"suggest":true,"write":false}'::jsonb,
+  scopes       jsonb NOT NULL DEFAULT '{}'::jsonb,
+  created_at   timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE TABLE agent_tokens (
+  id          uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  agent_id    uuid NOT NULL REFERENCES agents(id) ON DELETE CASCADE,
+  label       text,
+  token_hash  text NOT NULL,
+  last_used   timestamptz,
+  created_at  timestamptz NOT NULL DEFAULT now(),
+  revoked_at  timestamptz
+);
+
+CREATE TABLE conversations (
+  id           uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  title        text,
+  agent_id     uuid REFERENCES agents(id) ON DELETE SET NULL,
+  participants text[] NOT NULL DEFAULT '{}',
+  status       text NOT NULL DEFAULT 'open'
+               CHECK (status IN ('open','summarized','archived')),
+  summary      text,
+  metadata     jsonb NOT NULL DEFAULT '{}'::jsonb,
+  embedding    vector(1024),
+  started_at   timestamptz NOT NULL DEFAULT now(),
+  ended_at     timestamptz
+);
+
+CREATE TABLE messages (
+  id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  conversation_id uuid NOT NULL REFERENCES conversations(id) ON DELETE CASCADE,
+  role            text NOT NULL CHECK (role IN ('user','assistant','system','tool')),
+  agent_id        uuid REFERENCES agents(id) ON DELETE SET NULL,
+  body            text NOT NULL,
+  metadata        jsonb NOT NULL DEFAULT '{}'::jsonb,
+  created_at      timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX idx_messages_conv ON messages(conversation_id, created_at);
+CREATE INDEX idx_messages_fts ON messages USING GIN (to_tsvector('english', body));
+CREATE INDEX idx_agent_tokens_hash ON agent_tokens(token_hash) WHERE revoked_at IS NULL;