Codex Mastery skills for Codex
Skills about Codex itself: writing AGENTS.md files that keep the agent on your conventions, tuning config.toml profiles, choosing sandbox and approval modes, wiring MCP servers, running codex exec in CI, authoring and packaging new skills, and keeping long or parallel sessions productive. Install these first if you want Codex to configure and extend itself well.
curl -fsSL codexskills.dev/install.sh | sh -s -- --category codex Installs all 34 into ~/.agents/skills/. Or download the zip.
All 34 Codex Mastery skills
Each opens the full SKILL.md, example prompts and every way to install it.
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Agent Handoff Notes
Long tasks that survive any context reset -
Agentic PR Workflow
Agent PRs with evidence, not just claims -
AGENTS.md Authoring
Short, verified project rules Codex follows -
AGENTS.md for Monorepos
Root rules once, package rules where they apply -
Codex Cloud Environments
Cloud tasks that start ready to run tests -
Codex Code Review
Few findings, each one verified -
Codex config.toml
Every setting in the right layer, verified -
Codex Context Budget
Spend the context window on the task, not the preamble -
Codex Cost Control
Know tokens per task, then cut the waste -
Codex Custom Prompts
Turn repeated requests into one-word commands -
codex exec in CI
Headless Codex runs you can gate and audit -
Codex GitHub Action
Codex in workflows without leaking the key -
Codex IDE Extension
Hand Codex the code you are already looking at -
Codex MCP Servers
Connect tools to Codex, scoped and debuggable -
Codex Migration Guide
Bring your agent setup over without losing rules -
Codex Model Selection
The lightest model and effort that still passes -
Codex Output Schemas
JSON results your pipeline can actually trust -
Codex Parallel Worktrees
One checkout per agent, zero collisions -
Codex Plugin Packaging
Ship skills and MCP servers as one install -
Codex Profiles
Switch Codex presets with one flag -
Codex Prompting Patterns
Outcome, context, limits, proof: one pass -
Codex Sandbox and Approvals
The narrowest boundary that still finishes the job -
Codex SDK Automation
Drive Codex from TypeScript with real guardrails -
Codex Security Hardening
Least privilege for your coding agent -
Codex Session Resume
Pick up exactly where the last run stopped -
Codex Task Decomposition
Big changes as small, green, reviewable steps -
Codex Team Rollout
Same rules and guardrails for every engineer -
Codex Troubleshooting
From cryptic Codex error to named root cause -
Long-Running Agent Tasks
Hours of autonomy, milestone by verified milestone -
MCP Server Builder
Tools an agent picks right the first time -
Skill Authoring
From repeated prompt to a skill that triggers -
Skill Description Tuning
Make skills fire on cue, and only then -
Skill Evals
Prove a skill triggers when it should, and only then -
Skill Scripts and Packaging
Helper scripts and files that earn their place
No Codex Mastery skill matches that.
Where to start
Install the ones that match requests you make every week. Name one with $agents-md-authoring when you want it for sure; otherwise Codex picks by description.
Start with
- AGENTS.md AuthoringShort, verified project rules Codex follows
- Codex Security HardeningLeast privilege for your coding agent
- Agent Handoff NotesLong tasks that survive any context reset
Install a few by name
curl -fsSL codexskills.dev/install.sh | sh -s -- agent-handoff-notes agentic-pr-workflow 104-line POSIX script. No sudo, no telemetry. Read install.sh
Codex Mastery FAQ
How do I install every Codex Mastery skill at once?
Run curl -fsSL https://codexskills.dev/install.sh | sh -s -- --category codex to put all 34 in ~/.agents/skills/, or add --project to install them into the current repository's .agents/skills/. You can also download the category zip and unpack it yourself.
Does installing 34 skills slow Codex down?
Hardly. At startup Codex sees only each skill's name and description, a few dozen words apiece, and reads a full SKILL.md only when a task needs it. Install the whole category if the work fits; unused skills cost almost nothing.
Which Codex Mastery skill should I start with?
Start with AGENTS.md Authoring, Codex Security Hardening, Agent Handoff Notes. They cover the requests that come up most in this category. Mention one with $agents-md-authoring to try it.