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.
10 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 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.
Read articleCodex CLI vs Cursor vs Aider vs Claude Code: 2026 AI coding tools compared
Codex CLI / Cursor / Aider / Claude Code side-by-side: positioning, model support, UI/UX, CI fit, cost curve, migration cost. Decision matrix for teams and individual developers.
Read articleCodex CLI in GitHub Actions: production-grade CI integration
Plug Codex CLI into GitHub Actions for automatic PR review / test generation / doc sync. Covers OAuth vs API-key auth, npm caching, worktree concurrency isolation, audit and budget guardrails.
Read articleCodex Team Workflow: worktrees, reviews, and CI integration
How to use Codex CLI in a team without breaking things: independent git worktrees, diff review, CODEOWNERS, CI integration, sensitive-path whitelist, and PR review checklist.
Read articleGetting started with OpenAI Codex CLI: from install to daily use
A practical guide to installing OpenAI's Codex CLI, configuring auth, shipping your first change, and integrating it into daily coding.
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