codex

New Features

• Added a built-in amazon-bedrock model provider with configurable AWS profile support (#18744).
• Added /mcp verbose for full MCP server diagnostics, resources, and resource templates while keeping plain /mcp fast (#18610).
• Made plugin MCP loading accept both mcpServers and top-level server maps in .mcp.json (#18780).
• Improved realtime handoffs so background agents receive transcript deltas and can explicitly stay silent when appropriate (#18597, #18761, #18635).
• Added host-specific remote_sandbox_config requirements for remote environments (#18763).
• Refreshed bundled model metadata, including the current gpt-5.4 default (#18586, #18388, #18719).

Bug Fixes

• Fixed /copy after rollback so it copies the latest visible assistant response, not a pre-rollback response (#18739).
• Queued normal follow-up text submitted while a manual shell command is running, preventing stuck Working states (#18820).
• Fixed Unicode/dead-key input in VS Code WSL terminals by disabling the enhanced keyboard mode there (#18741).
• Prevented stale proxy environment variables from being restored from shell snapshots (#17271).
• Made codex exec inherit root-level shared flags such as sandbox and model options (#18630).
• Removed leaked review prompts from TUI transcripts (#18659).

Documentation

• Added and tightened the Code Review skill instructions used by Codex-driven reviews (#18746, #18818).
• Documented intentional await-across-lock cases and enabled Clippy linting for them (#18423, #18698).
• Updated app-server protocol docs for threadless MCP resource reads and namespaced dynamic tools (#18292, #18413).

Chores

• Fixed high-severity dependency alerts by pinning patched JS and Rust dependencies (#18167).
• Reduced Rust dev build debug-info overhead while preserving useful backtraces (#18844).
• Refreshed generated Python app-server SDK types from the current schema (#18862).

Changelog

Full Changelog: https://github.com/openai/codex/compare/rust-v0.122.0...rust-v0.123.0

• #18662 feat: add metric to track the number of turns with memory usage @jif-oai
• #18659 chore: drop review prompt from TUI UX @jif-oai
• #18661 feat: log client use min log level @jif-oai
• #18094 [codex] Use background agent task auth for backend calls @adrian-openai
• #18441 Avoid false shell snapshot cleanup warnings @etraut-openai
• #18260 [codex] Use background task auth for additional backend calls @adrian-openai
• #18657 fix: auth.json leak in tests @jif-oai
• #18610 Add verbose diagnostics for /mcp @etraut-openai
• #18633 Use app server thread names in TUI picker @etraut-openai
• #18591 Surface parent thread status in side conversations @etraut-openai
• #18361 codex: move thread/name/set and thread/memoryModeSet into ThreadStore @wiltzius-openai
• #18274 protocol: canonicalize file system permissions @bolinfest
• #18403 refactor: use semaphores for async serialization gates @bolinfest
• #18586 Update models.json @aibrahim-oai
• #18289 Wire the PatchUpdated events through app_server @akshaynathan
• #18631 Remove simple TUI legacy_core reexports @etraut-openai
• #18697 [codex] Fix agent identity auth test fixture @adrian-openai
• #18388 Update models.json @github-actions
• #18167 [codex] Fix high severity dependency alerts @caseysilver-oai
• #17692 [codex-analytics] guardian review analytics schema polishing @rhan-oai
• #18722 chore(guardian) disable mcps and plugins @dylan-hurd-oai
• #18597 Update realtime handoff transcript handling @guinness-oai
• #18627 Surface TUI skills refresh failures @etraut-openai
• #18719 Fix stale model test fixtures @aibrahim-oai
• #18714 Add experimental remote thread store config @wiltzius-openai
• #18739 fix(tui): keep /copy aligned with rollback @fcoury-oai
• #18701 [codex] prefer inherited spawn agent model @tibo-openai
• #18632 Use app server metadata for fork parent titles @etraut-openai
• #18112 feat: cascade thread archive @jif-oai
• #18716 Read conversation summaries through thread store @wiltzius-openai
• #18635 Add realtime silence tool @guinness-oai
• #18254 uds: add async Unix socket crate @euroelessar
• #18746 Add Code Review skill @pakrym-oai
• #18208 Add session config loader interface @rasmusrygaard
• #18753 Refactor TUI app module into submodules @etraut-openai
• #18630 Fix exec inheritance of root shared flags @etraut-openai
• #18027 [6/6] Fail exec client operations after disconnect @aibrahim-oai
• #17271 fix: fix stale proxy env restoration after shell snapshots @viyatb-oai
• #18602 Warn when trusting Git subdirectories @etraut-openai
• #18761 [codex] Send realtime transcript deltas on handoff @guinness-oai
• #18435 /statusline & /title - Shared preview values @canvrno-oai
• #18744 feat: add a built-in Amazon Bedrock model provider @celia-oai
• #18581 [1/4] Add executor HTTP request protocol @aibrahim-oai
• #18418 refactor: narrow async lock scopes @bolinfest
• #18780 feat: Support more plugin MCP file shapes. @xl-openai
• #18713 protocol: preserve glob scan depth in permission profiles @bolinfest
• #18795 fix(guardian) Dont hard error on feature disable @dylan-hurd-oai
• #18292 Make MCP resource read threadless @mzeng-openai
• #18786 Fallback display names for TUI skill mentions @canvrno-oai
• #18807 chore(app-server) linguist-generated @dylan-hurd-oai
• #18393 feat(auto-review) Handle request_permissions calls @dylan-hurd-oai
• #18763 Add remote_sandbox_config to our config requirements @abhinav-oai
• #18794 Organize context fragments @pakrym-oai
• #18423 chore: document intentional await-holding cases @bolinfest
• #18698 chore: enable await-holding clippy lints @bolinfest
• #18413 [tool search] support namespaced deferred dynamic tools @pash-openai
• #18818 [codex] Tighten code review skill wording @pakrym-oai
• #18271 show bash mode in the TUI @abhinav-oai
• #18741 fix(tui): disable enhanced keys for VS Code WSL @fcoury-oai
• #18850 Move external agent config out of core @pakrym-oai
• #18844 build: reduce Rust dev debuginfo @bolinfest
• #18848 feat: baseline lib @jif-oai
• #18846 core: make test-log a dev dependency @bolinfest
• #18428 app-server: define device key v2 protocol @euroelessar
• #18093 Propagate thread id in MCP tool metadata @rennie-openai
• #17836 [codex] Add tmux-aware OSC 9 notifications @caseychow-oai
• #18820 Queue follow-up input during user shell commands @etraut-openai
• #18858 Stabilize debug clear memories integration test @jif-oai
• #18799 Move TUI app tests to modules they cover @etraut-openai
• #18442 Refactor app-server config loading into ConfigManager @pakrym-oai
• #18813 Split DeveloperInstructions into individual fragments. @pakrym-oai
• #18275 sandboxing: intersect permission profiles semantically @bolinfest
• #18862 Refresh generated Python app-server SDK types @sdcoffey
• #15578 Add Windows sandbox unified exec runtime support @iceweasel-oai
• #18429 app-server: add codex-device-key crate @euroelessar
• #18872 app-server: fix Bazel clippy in tracing tests @euroelessar
• #18885 skip busted tests while I fix them @iceweasel-oai
• #18873 chore: default multi-agent v2 fork to all @jif-oai