Added
- Test harness - Added vitest with 20 tests covering session queries, key encoding, notification formatting, headless monitor lifecycle, session manager, config/docs parity, and module loading.
- gpt-5-4-prompting skill - New bundled skill with GPT-5.4 prompting best practices for Codex workflows.
Changed
- Architecture refactor - Extracted shared logic into 8 focused modules for better maintainability: session-query, notification-utils, handoff-utils, runtime-coordinator, pty-log, pty-protocol, spawn-helper, background-widget.
- Docs (README, SKILL.md, install output) now consistently recommend dispatch mode with current defaults.
- Codex workflow examples updated for gpt-5.4 with bundled skills.
- Renamed codex-5.3-prompting → codex-5-3-prompting (filesystem-friendly).
Fixed
- Map/array iteration bugs in disposeAllMonitors() and PTY listener notifications.
- Missing @sinclair/typebox runtime dependency.