- Made Codex websocket prewarm asynchronous and non-blocking during session creation for faster startup.
- Added Codex websocket status updates in interactive mode when prewarm completes or fails.
- Introduced `getOpenAICodexTransportDetails()` to determine transport preferences before prewarm initialization.
- Refactored Codex prewarm to fire in background without awaiting, matching LSP server warmup pattern.
- Updated CHANGELOG entries for ai and coding-agent packages to reflect Codex startup event monitoring and async prewarm behavior.