-- lib/db/migrations/007_companion.sql
-- Plan 5: per-Space ambient companion conversation + default companion agent.

ALTER TABLE conversations
  ADD COLUMN space_id uuid REFERENCES spaces(id) ON DELETE CASCADE;

CREATE INDEX idx_conversations_space ON conversations(space_id, started_at DESC);

INSERT INTO agents (slug, name, kind, model, capabilities)
VALUES (
  'companion', 'Companion', 'claude', NULL,
  '{"read":true,"suggest":true,"write":false}'::jsonb
)
ON CONFLICT (slug) DO NOTHING;