Codex Knowledge Base
Codex CLI v0.133.0 Release Guide: Goals Enabled by Default, Permission Profile Inheritance, and Extension Lifecycle Events
Codex CLI v0.133.0 landed on 21 May 2026 with over 80 merged pull requests . The headline change is deceptively simple — goals are now on by default.
Codex CLI v0.133.0-alpha: SubagentStart Hooks, Goal DB, and Permission Profile APIs — Signals for Multi-Agent Orchestration
Between the stable v0.132.0 release on 20 May 2026 and the same evening, OpenAI shipped three alpha pre-releases — v0.133.0-alpha.1 through alpha.3.
Codex CLI + shadcn/ui: Agent-Driven Design System Workflows with MCP Server, Skills, and CLI v4
The shadcn/ui March 2026 release — CLI v4, the official skills system, and the shadcn MCP server — turned what was already the most popular component.
Codex CLI Session Transcripts: JSONL Format, Replay Tools, and Audit Analysis
Every Codex CLI session generates a complete JSONL transcript — every prompt, model response, tool call, approval decision, and token counter, timestamped.
Codex CLI Security Testing Tools: codex sandbox, codex execpolicy, and Offline Policy Validation
Codex CLI ships two subcommands that most developers never discover: codex sandbox and codex execpolicy check. Together, they let you validate your security.
Codex CLI Prompt Engineering in the GPT-5.5 Era: Outcome-First Patterns, Anti-Patterns, and the Prompts That Ship Code on the First Turn
The single most common question in the OpenAI developer forum is some variation of Why does Codex produce garbage for me but magic for everyone else? .
Codex CLI MITM Hooks: HTTPS Request Interception, Header Mutation, and Network-Level Policy Enforcement
Codex CLI's sandbox has always controlled what an agent can do on disk and whether it can reach the network.
Codex CLI Log Files and Debug Tracing: The Complete Diagnostic Toolkit for When Sessions Fail
Something broke. The agent hung mid-refactor, an MCP server silently disconnected, or authentication failed three turns into a goal workflow.
Codex CLI for Scala Development Teams: Metals MCP, sbt, and Idiomatic Functional Workflows
Dedicated language-specific Codex CLI articles exist for Go, Rust, Ruby/Rails, Python/Django/FastAPI, C/C++, Elixir/Phoenix, Swift, Kotlin/Android.
Codex CLI for Go Development Teams: gopls MCP, Agent Skills, and Go 1.26 Workflows
Go teams adopting Codex CLI face a specific configuration challenge: the language's strong conventions around error handling, concurrency, and module.