Highlights

• Introducing our new model GPT-5-Codex-Mini — a more compact and cost-efficient version of GPT-5-Codex

PRs merged

• #6211 fix: Update the deprecation message to link to the docs
• #6212 [app-server] feat: export.rs supports a v2 namespace, initial v2
  notifications
• #6230 Fix nix build
• #3643 fix(core): load custom prompts from symlinked Markdown files
• #4200 allow codex to be run from pid 1
• #6234 Upgrade rmcp to 0.8.4
• #6237 Add modelReasoningEffort option to TypeScript SDK
• #5565 tui: refactor ChatWidget and BottomPane to use Renderables
• #6229 refactor Conversation history file into its own directory
• #6231 Improved token refresh handling to address “Re-connecting” behavior
• #6261 Update rmcp to 0.8.5
• #6214 [app-server] feat: v2 Thread APIs
• #6282 Fixes intermittent test failures in CI
• #6249 stop capturing r when environment selection modal is open
• #6183 [App-server] Implement v2 for account/login/start and account/login/completed
• #6285 Prevent dismissal of login menu in TUI
• #4388 fix: ToC so it doesn’t include itself or duplicate the end marker
• #6288 [App-server] Add account/login/cancel v2 endpoint
• #6286 feat: add model nudge for queries
• #6300 feat: support models with single reasoning effort
• #6319 chore: rename for clarity
• #6216 [app-server] feat: v2 Turn APIs
• #6295 docs: Fix code fence and typo in advanced guide
• #6326 chore: fix grammar mistakes
• #6283 Windows Sandbox: Show Everyone-writable directory warning
• #6289 chore: move relevant tests to app-server/tests/suite/v2
• #6333 feat: clarify that gpt-5-codex should not amend commits unless requested
• #6332 Updated contributing guidelines and PR template to request link to bug report
  in PR notes
• #5980 core: widen sandbox to allow certificate ops when network is enabled
• #6337 [App Server] Add more session metadata to listConversations