Assistants/OpenAI Codex CLI

OpenAI Codex CLI

OpenAI · cli agent · paid

Lightweight coding agent that runs in your terminal (Codex CLI).

agentcliopenaicodex

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Config files OpenAI Codex CLI has changed

Config you own — hooks, permission rules, MCP servers, settings — that releases below state a change to. Counted from the release notes we track, newest change first. How a harness is layered.

skills and plugins2 changes · 4 releases touched it · latest Sep 3, 2026 · rust-v0.153.0 ↗

MCP server config1 change · 8 releases touched it · latest Jul 29, 2026 · rust-v0.146.0 ↗

sandbox settings1 change · 5 releases touched it · latest Aug 7, 2026 · rust-v0.147.0 ↗

permission rules1 change · 4 releases touched it · latest Aug 26, 2026 · rust-v0.150.0 ↗

agent context files1 change · latest Aug 26, 2026 · rust-v0.150.0 ↗

Release signals

OpenAI Codex CLIrust-v0.153.0-alpha.4Sep 1, 2026

alpha.4

Release 0.153.0-alpha.4Primary source ↗

OpenAI Codex CLIrust-v0.153.0-alpha.2Sep 1, 2026

alpha.2

Release 0.153.0-alpha.2Primary source ↗

OpenAI Codex CLIrust-v0.153.0-alpha.1Sep 1, 2026

alpha.1

Release 0.153.0-alpha.1Primary source ↗

OpenAI Codex CLIrust-v0.152.0Sep 1, 2026

Vim mode supports `/` and `?` searches within drafts, highlighted matches, and repeat navigation with `n` and `N`. (#41586)

Rate-limit banners offer actions for checking usage, managing credits, resetting limits, and managing plans. (#41742)
The terminal UI and `codex exec` show credential-refresh progress, including Amazon Bedrock reauthentication. (#41239)
MCP server names can contain `:`, `@`, `/`, and `.`, supporting package-style names throughout CLI commands and authentication. (#41700)
+101 more changes

Read the full release note

New Features

Vim mode supports / and ? searches within drafts, highlighted matches, and repeat navigation with n and N. (#41586)
Rate-limit banners offer actions for checking usage, managing credits, resetting limits, and managing plans. (#41742)
The terminal UI and codex exec show credential-refresh progress, including Amazon Bedrock reauthentication. (#41239)
MCP server names can contain :, @, /, and ., supporting package-style names throughout CLI commands and authentication. (#41700)
Individual MCP tools support an output_token_limit setting, with consistent truncation across session resumes. (#41421)
App-server clients can configure thread/shellCommand timeouts, including deadlines longer than one hour. (#41384)

Bug Fixes

Vim-enabled composers now start fresh drafts in Insert mode, including after submitting messages or dispatching slash commands. (#41921)
Automatic approval reviews can retain longer messages and a larger conversation transcript. (#41931)
Automatic approval reviews preserve user instructions, answers, and valid authorizations across history compaction. (#41660, #41846, #41852)

Excerpt ends here — this release continues at the source ↗.

Primary source ↗

OpenAI Codex CLIrust-v0.152.0-alpha.7.2Sep 1, 2026

alpha.7.2

Release 0.152.0-alpha.7.2Primary source ↗

OpenAI Codex CLIrust-v0.152.0-alpha.7Aug 31, 2026

alpha.7

Release 0.152.0-alpha.7Primary source ↗

OpenAI Codex CLIrust-v0.152.0-alpha.6Aug 31, 2026

alpha.6

Release 0.152.0-alpha.6Primary source ↗

OpenAI Codex CLIrust-v0.152.0-alpha.5Aug 31, 2026

alpha.5

Release 0.152.0-alpha.5Primary source ↗

OpenAI Codex CLIrust-v0.152.0-alpha.4Aug 30, 2026

alpha.4

Release 0.152.0-alpha.4Primary source ↗

OpenAI Codex CLIrust-v0.151.0-alpha.7.2Aug 29, 2026

alpha.7.2

Release 0.151.0-alpha.7.2Primary source ↗

OpenAI Codex CLIrust-v0.152.0-alpha.1Aug 29, 2026

alpha.1

Release 0.152.0-alpha.1Primary source ↗

OpenAI Codex CLIrust-v0.151.0Aug 29, 2026

Added a configurable grace period for discovering tools from optional MCP servers. (#41199)

Extensions can now inspect or replace MCP tool results before they reach the model. (#41202)
Plugin catalogs now combine per-repository configuration and report invalid project marketplaces without hiding valid plugins. (#41208)
Preserved restored permission profiles across TUI turns and prevented `/cd` from weakening sandbox restrictions. (#41192)
Kept tool availability and reasoning effort correct when switching models or falling back to another model. (#41195, #41206)
+22 more changes

Read the full release note

New Features

Added a configurable grace period for discovering tools from optional MCP servers. (#41199)
Extensions can now inspect or replace MCP tool results before they reach the model. (#41202)
Plugin catalogs now combine per-repository configuration and report invalid project marketplaces without hiding valid plugins. (#41208)

Bug Fixes

Preserved restored permission profiles across TUI turns and prevented /cd from weakening sandbox restrictions. (#41192)
Kept tool availability and reasoning effort correct when switching models or falling back to another model. (#41195, #41206)
Improved remote sandbox enforcement using the executor’s actual home directory, operating system, and path conventions. (#41196, #41204, #41207, #41209)
Preserved structured MCP tool and resource errors in app-server responses. (#41196)
Counted nested subagent token usage toward root goal budgets. (#41183)
Prevented stale Guardian classifications from authorizing actions after permission state changes. (#41196)