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