May 2026 monthly summary for openai/codex: Key outcomes include introducing an opaque 'desktop' configuration namespace to decouple desktop preferences from the core app, and delivering a Realtime v1 websocket compatibility fix to align data shapes and conditional headers. Together, these workstreams improve desktop integration stability, preserve backward compatibility, and reduce integration risk for Electron-based clients.

April 2026 (2026-04) focused on delivering robust real-time delegation and context-sharing capabilities for openai/codex, with four key feature deliverables that enhance data correctness, efficiency, and collaboration ergonomics. These changes improve real-time data formatting, enrich handoffs with richer context, support quieter collaboration modes, and optimize data transmission during transcript handoffs. While there were no explicit major bug fixes recorded this month, the work enhances reliability, reduces latency, and strengthens Codex’s ability to respond coherently in real-time conversations. Technologies demonstrated include real-time websocket data handling, XML wrapping/escaping, handoff protocol design, and tool-driven orchestration.

March 2026 — Codex: focused on reliability and lifecycle robustness during app quit and cold resume. Delivered stability improvements to thread handling that prevent resumed threads from getting stuck in progress, reducing user disruption during restarts.

February 2026 – Codex: Thread Fork Integrity fix and test coverage. Fixed a data integrity issue where forked sessions could lose their unique thread_id due to overwriting metadata from the source thread. Implemented by designating the first rollout session_meta as the canonical identity during a fork, ensuring forks retain a unique thread_id. Added automated tests to verify thread_id association for forked sessions. Change captured in commit 099ed802b20852148bf14f9d85ed77eb3ba8601b (#11241).