Codex
OpenAI Codex and AI-assisted coding
Codex CLI is a terminal-based coding agent powered by cloud Codex models. This channel walks through the full engineering workflow — from install, auth, and sandboxing to running Codex in an isolated git worktree, reviewing diffs, and merging back to main.
16 article(s) total
What you'll learn in this channel
These are the core topics this channel covers. Each featured article unpacks several of them in depth.
- Codex CLI install
- Auth & API keys
- Sandbox & permissions
- Working with git worktree
- Fixing a real bug
- Team rollout lessons
Codex Preview Line Jumps from 0.167 to 0.168: Four Releases, No Stable Close (2026)
The Codex 0.167 preview line reached alpha.5 on GitHub without ever shipping a stable release — npm's alpha dist-tag moved to 0.168.0-alpha.1 on November 4, while PyPI's openai-codex remains stuck at 0.163.0.
Read articleCodex CLI 0.166.0, Explained: GPT-6.1 Terra in Vertex AI and Bedrock Catalogs, Transcript Search, doctor
0.166.0 went stable on 2026-10-29T19:47 UTC: GPT-6.1 Terra covers the Vertex AI and Bedrock catalogs too; the TUI gains keyboard transcript selection and search; queue --resume and doctor --network-only land. PyPI gap: three versions.
Read articleCodex CLI 0.164–0.165, Explained: GPT-6.1 Terra in the Catalog, a Vertex AI Provider, /presets, memory v2
Two stable releases since 0.163: 0.164.0 (Oct 23) adds /presets and inline /model and /permissions; 0.165.0 (Oct 27) ships a Vertex AI provider and GPT-6.1 Terra in the catalog. Checked against the official notes.
Read articleOpenAI Maintains Software with GPT-6: 1,400+ PRs, 800k Lines, 92%-for-14%
OpenAI's Core Experimentation team details GPT-6-powered maintenance: 1,400+ dead-code PRs, stale-experiment retirement, and a comparison where 6.1 Sol Ultra matched 92% of Astra's findings at 14% of the cost.
Read articleCodex CLI 0.163.0, Explained: Daybreak On by Default, Instant Interrupts, /config Search
The 0.163 preview line closes into a stable release: Daybreak on by default for eligible accounts, instant interrupts by default, /config preference search, a leader key, parallel read-only tools — and the bundled zsh is gone.
Read articleCodex CLI 0.156–0.162, Explained: Voice by Default, GPT-6.1 Sol as Default Model, Worktrees and Command Center
Seven stable releases since our 0.155 coverage: voice on by default, GPT-6 Sol/Luna, GPT-6.1 Sol as default model, MCP OAuth client secrets, Git worktree tools, Command Center pinning — mapped against the official release notes.
Read articleCodex Cloud Setup: Environments, Cloud Tasks, and the codex cloud CLI
Codex Cloud (called Codex Web in the source) is the hosted Codex surface: tasks run in cloud environments organized per GitHub repo, and the codex cloud CLI submits, tracks, and pulls diffs back to your machine.
Read articleCodex CLI config.toml: The Complete Guide to Models, Approvals, MCP and Layered Config
Codex CLI centers on ~/.codex/config.toml: model picks the model, approval_policy gates prompts, sandbox_mode sets boundaries, mcp_servers wires tools, profiles switch scenarios.
Read articleCodex CLI Sandbox Modes: sandbox_mode and approval_policy Explained
Codex CLI sandbox has four levels — read-only, workspace-write, external-sandbox, danger-full-access — plus a separate approval_policy axis. Every value checked against the codex source enums.
Read articleCodex CLI 0.155, Explained: Experimental /voice, Touch ID for MCP Requests, and the 0.155.1 Revert
Codex CLI 0.155.0/0.155.1 back to back: experimental /voice behind /experimental, streaming reasoning summaries, Touch ID for MCP requests, daemon update schedules, Bedrock credentials — plus the 0.155.1 reasoning-summary revert.
Read articleCodex CLI 0.154.0 and SDK 0.154.0: Worktrees, ExternalMessage, and the ultra Reasoning Effort
Codex CLI 0.154.0 (2026-09-09) ships experimental worktrees, inline Q&A, a shared Windows server, and drops the mcp-server entry point; SDK 0.154.0 adds max/ultra efforts and ExternalMessage. Voice is build-side only.
Read articleCodex CLI vs IDE Extension vs Codex Cloud: Choosing a Codex Surface
Codex ships in three surfaces -- local terminal, IDE extension, and cloud. This guide compares execution environment, sandbox and approvals, automation, and scenarios, with a migration view for Cursor users.
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