{"role":"user","content":"Ship a migration plan. Never delete customer records."}
{"role":"assistant","content":"Constraint accepted: preserve every customer record."}
{"role":"user","content":"Check the schema."}
{"role":"assistant","content":"Reading schema.","tool_calls":[{"id":"schema-1","type":"function","function":{"name":"read_file","arguments":"schema.sql"}}]}
{"role":"tool","tool_call_id":"schema-1","content":"customers(id, email, created_at)"}
{"role":"assistant","content":"Add the index concurrently; retain all rows."}
{"role":"user","content":"Aside: what should the mascot wear?"}
{"role":"assistant","content":"A very large green hat. This does not affect the migration."}
{"role":"user","content":"Continue with the rollback checklist."}
{"role":"assistant","content":"Rollback removes the new index only, never customer data."}