OpenAI Codex CLI rust-v0.78.0

OpenAI Codex CLI rust-v0.78.0 was released on January 6, 2026.

Summary

New Features - Add Ctrl+G to open the current prompt in your configured external editor ($VISUAL/$EDITOR) and sync edits back into the TUI. (7606) - Support project-aware config layering: load repo...

Release Notes

New Features - Add Ctrl+G to open the current prompt in your configured external editor ($VISUAL/$EDITOR) and sync edits back into the TUI. (7606) - Support project-aware config layering: load repo-local .codex/config.toml, honor configurable projectrootmarkers, and merge that with system config like /etc/codex/config.toml. (8354, 8359, 8461) - Support enterprise-managed configuration requirements on macOS via an MDM-provided TOML payload. (8743) - Improve tui2 transcript navigation with multi-click selection, a copy shortcut/affordance, and a draggable auto-hiding scrollbar. (8462, 8471, 8728) - Start Windows PowerShell sessions in UTF-8 mode to reduce encoding-related prompt/output issues. (7902) - Exec policy rules can now include human-readable justifications, and policy loading follows the unified config-layer stack. (8349, 8453, 8751) Bug Fixes - Fix failures when the model returns multiple tool calls in a single turn by emitting tool calls in the format the Chat Completions API expects. (8556) - Make /review compute diffs from the session’s working directory so base-branch detection works correctly with runtime cwd overrides. (8738) - Handle the legacy Chat Completions streaming terminator cleanly to avoid spurious SSE parse errors. (8708) - Fix a set of tui2 rendering/input edge cases (screen corruption, scroll stickiness, and selection/copy correctness). (8463, 8695, 8449) - Improve diagnostics when ripgrep download fails during CLI packaging so failures are easier to debug. (8486) - Avoid a panic when parsing alpha/stable version strings. (8406) Documentation - Replace and de-duplicate user docs with links to the developer documentation site (including skills docs). (8662, 8407) - Clarify configuration documentation, including the developerinstructions option. (8376, 8701) - Fix broken README links. (8682) Chores - Performance tuning for TUIs: cap redraw scheduling and reduce unnecessary rerenders during streaming to lower CPU usage. (8499, 8681, 8693) - Update Rust dependencies across codex-rs. (8414, 8596, 8597) Changelog Full Changelog: https://github.com/openai/codex/compare/rust-v0.77.0...rust-v0.78.0 - 8407 Point skills docs to developer documentation site @etraut-openai - 8406 fix: do not panic on alphas @aibrahim-oai - 8091 Update ghostcommit flag reference to undo @charlie-openai - 8423 test(tui2): re-enable ANSI for VT100 tests @joshka-oai - 8419 fix(tui2): constrain transcript mouse selection bounds @joshka-oai - 8424 chore: un-ship undo @jif-oai - 8376 docs: add developerinstructions config option and update descriptions @448523760 - 8431 chore: drop undo from the docs @jif-oai - 8410 chore(deps): bump peter-evans/create-pull-request from 7 to 8 @dependabot - 8412 chore(deps): bump test-log from 0.2.18 to 0.2.19 in /codex-rs @dependabot - 8413 chore(deps): bump landlock from 0.4.2 to 0.4.4 in /codex-rs @dependabot - 8414 chore(deps): bump clap from 4.5.47 to 4.5.53 in /codex-rs @dependabot - 8416 chore(deps): bump openssl-sys from 0.9.109 to 0.9.111 in /codex-rs @dependabot - 7902 feat(windows) start powershell in utf-8 mode @dylan-hurd-oai - 8349 Add ExecPolicyManager @pakrym-oai - 8354 feat: support in-repo .codex/config.toml entries as sources of config info @bolinfest - 8359 feat: add support for projectrootmarkers in config.toml @bolinfest - 8395 Handle concatenation nodes in bash command parser for exec policy @ivanmurashko - 8446 Update models.json @github-actions - 8444 use a junction for the cwd while read ACLs are being applied @iceweasel-oai - 8447 remove minimal client version @aibrahim-oai - 8448 chore: add ConfigLayerStack as a field of Config @bolinfest - 7606 feat: open prompt in configured external editor @sayan-oai - 8449 fix(tui2): copy transcript selection outside viewport @joshka-oai - 8418 chore(tui): include tracing targets in file logs @joshka-oai - 8456 chore: include User layer in ConfigLayerStack even if config.toml is empty @bolinfest - 8453 feat: load ExecPolicyManager from ConfigLayerStack @bolinfest - 8462 feat(tui2): add copy selection shortcut + UI affordance @joshka-oai - 8461 feat: honor /etc/codex/config.toml @bolinfest - 8463 fix(tui2): fix screen corruption @joshka-oai - 8458 chore: save more about turn context in rollout log file @apanasenko-oai - 8466 fix(tui2): start transcript selection on drag @joshka-oai - 8293 [tui] add optional details to TUI status header @sayan-oai - 8471 feat(tui2): add multi-click transcript selection @joshka-oai - 8486 fix(codex-cli): improve ripgrep download diagnostics @joshka-oai - 8460 fix: limit output size for exec command in unified exec @shijie-oai - 8493 fix: fix test that was writing temp file to cwd instead of TMPDIR @bolinfest - 8484 Remove reasoning format @aibrahim-oai - 8499 perf(tui): cap redraw scheduling to 60fps @joshka-oai - 8496 feat: introduce codex-utils-cargo-bin as an alternative to assertcmd::Command @bolinfest - 8498 fix: declare test path relative to $CARGOMANIFESTDIR @bolinfest - 8307 [chore] add additionaldetails to StreamErrorEvent + wire through @sayan-oai - 8522 fix: restrict windows-sys to Windows target @RunjiLiu - 8595 chore(deps): bump tomledit from 0.23.7 to 0.24.0+spec-1.1.0 in /codex-rs @dependabot - 8596 chore(deps): bump tracing-subscriber from 0.3.20 to 0.3.22 in /codex-rs @dependabot - 8597 chore(deps): bump tokio from 1.47.1 to 1.48.0 in /codex-rs @dependabot - 8598 chore(deps): bump regex-lite from 0.1.7 to 0.1.8 in /codex-rs @dependabot - 8491 Refresh on models etag mismatch @aibrahim-oai - 8483 use a SandboxUsers group for ACLs instead of granting to each sandbox user separately @iceweasel-oai - 8676 Log compaction request bodies @pakrym-oai - 8488 Remove model family from tui @aibrahim-oai - 8662 Replaced user documentation with links to developers docs site @etraut-openai - 8681 perf(tui2): reduce unnecessary redraws @joshka-oai - 8682 Fixed broken link in README @etraut-openai - 8677 Account for last token count on resume @aibrahim-oai - 8687 hard disable remote models refresh when feature is disabled @aibrahim-oai - 8415 chore(deps): bump tracing-opentelemetry from 0.31.0 to 0.32.0 in /codex-rs @dependabot - 8688 Attach more tags to feedback submissions @pakrym-oai - 8701 chore: update outdated docs @tibo-openai - 8693 perf(tui2): cache transcript view rendering @joshka-oai - 8697 fix: brighten transcript copy affordance @joshka-oai - 8629 ci: prevent workflows from running on forks @leezenn - 8695 fix(tui2): avoid scroll stickiness at cell boundaries @joshka-oai - 8716 fix(tui2): render copy pill at viewport bottom @joshka-oai - 8718 tui2: copy selection dismisses highlight @joshka-oai - 8721 chore(deps): bump clapcomplete from 4.5.57 to 4.5.64 in /codex-rs @dependabot - 8723 chore(deps): bump tokio-stream from 0.1.17 to 0.1.18 in /codex-rs @dependabot - 8724 chore(deps): bump derivemore from 2.0.1 to 2.1.1 in /codex-rs @dependabot - 8725 chore(deps): bump insta from 1.44.3 to 1.46.0 in /codex-rs @dependabot - 8556 fix: chat multiple tool calls @jif-oai - 8738 fix: /review to respect session cwd @tibo-openai - 8694 [MCP] Sanitize MCP tool names to ensure they are compatible with the Responses APO @gpeal - 8728 feat(tui2): transcript scrollbar (auto-hide + drag) @joshka-oai - 8708 fix(codex-api): handle Chat Completions DONE sentinel @joshka-oai - 8743 (MacOS) Load config requirements from MDM @gt-oai - 8377 feat: expose outputSchema to userturn/turnstart appserver API @apanasenko-oai - 8747 chore: GH pager @jif-oai - 8686 better idempotency for creating/updating firewall rules during setup. @iceweasel-oai - 8683 never let sandbox write to .codex/ or .codex/.sandbox/ @iceweasel-oai - 8459 chore: improve skills render section @gverma-openai - 7858 Use issuer URL in device auth prompt link @abrar71 - 8492 best effort to "hide" Sandbox users @iceweasel-oai - 8751 feat: add justification arg to prefixrule() in .rules @bolinfest

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