CREATE TABLE prompts (
    id text PRIMARY KEY,
    repository_id text NOT NULL REFERENCES repositories(id) ON DELETE CASCADE,
    task_id text NOT NULL DEFAULT '',
    attempt_id text NOT NULL DEFAULT '',
    state_id text NOT NULL DEFAULT '',
    prompt text NOT NULL,
    agent_name text NOT NULL DEFAULT '',
    agent_model text NOT NULL DEFAULT '',
    status text NOT NULL DEFAULT 'running' CHECK (status IN ('running', 'completed', 'failed', 'cancelled')),
    response_summary text NOT NULL DEFAULT '',
    metadata jsonb NOT NULL DEFAULT '{}'::jsonb,
    created_at timestamptz NOT NULL DEFAULT now(),
    completed_at timestamptz
);

CREATE INDEX prompts_repository_created_at_idx ON prompts (repository_id, created_at DESC);