codex-acp

Upgrade Codex in this repository and resolve compatibility regressions caused by app-server schema/protocol changes. Use when bumping Codex/npm package versions, regenerating `src/app-server` types, fixing TypeScript errors after update, repairing event mappings, and updating tests/snapshots to match new Codex behavior (especially model list, thread/session fields, sandbox policy shape, and tool/event notifications).

Run real Codex with a prompt to test and verify code during development. Use when debugging event handling, understanding Codex responses, or validating implementation changes against real behavior.