BEFORE — real T3 Code server — existing-malformed
Commit: 0cf9423d8b1220a435703ff98a2dabbddc1e59ef
Environment: Linux; Node v26.12.1
Fresh synthetic database; T3CODE_DEV_SEED=0
Seed: runMigrations(toMigrationInclusive: 85)
Seed user_message payload_json = '{not json'
Command: node src/bin.ts serve --base-dir <isolated-home> --host 127.0.0.1 --port <port> --no-browser

Captured server output:
  migration: 86_QueuedTurnInputIndex
[19:47:10.243] ERROR (#2): MigrationError: Migration "86_QueuedTurnInputIndex" failed
      [cause]: Error: malformed JSON

Server response: none; process exited
Server state before cleanup: exited 1
Database migration after startup: 85
Original row preserved: [('before-86', '{not json')]
Offline post-start malformed INSERT: accepted
Offline post-start malformed UPDATE: accepted