skills: Instructions file for Codex

Agent guide

Humans: see README.md.

This repo is a public collection of reusable agent skills. Each skill must work in any project that installs it.

Layout

• One folder per skill at the repo root: <name>/SKILL.md, plus optional scripts/ and references/.
• No category subfolders. The name prefix does the grouping.
• README.md lists every skill in the table for its topic. Add, rename, or remove a skill and its README row in the same change.

Naming

Choose the prefix by the first rule that applies:

1. Framework or platform. A skill that only makes sense with one framework or platform starts with its name: effect-, svelte-, alchemy-, sentry-. Use the bare name (effect) for the skill that covers the framework's general conventions.
2. GitHub CLI. A skill whose procedure or scripts run gh starts with gh-. A skill that only mentions gh as an optional alternative does not.
3. Topic. Every other skill starts with a short topic prefix:
   • eng-: engineering practice (change checklists, testing, measurement, migrations, CLI design).
   • comms-: explaining and writing (how, why, review verdicts, technical writing, prose cleanup).
   • agents-: working with agents (subagent fan-out, reflection, correcting repeated mistakes, verification skills).

Add a new topic prefix only when no existing one fits, and keep it short. Names are lowercase and hyphenated. The folder name must equal the name: field.

Renaming a skill changes its install path. Update every cross-reference and the README in the same change, and say so in the PR.

Skill content

• No private names. A skill never names a private organization, repository, product, package scope, internal domain, service, environment, secret path, or a skill that lives only in another repo. Public tools and platforms (Effect, Svelte, Cloudflare, Sentry, Alchemy, Infisical, GitHub) are fine as general examples. Use a neutral example when a real one would identify a private project.
• Repo facts come from the installing repo. Do not inline project commands, paths, or names. Each skill has a Repo facts line listing what it expects the repo's AGENTS.md or CLAUDE.md to provide, such as check commands, environments, or a Sentry project.
• Frontmatter. name matches the folder. description says what the skill does and includes a "Use when ..." trigger, in under about 400 characters. Do not set disable-model-invocation: some agents then never load the skill, even by name, and cross-references to it break.
• Cross-references name other skills in this repo by their current names in backticks. Never reference a skill outside this repo; describe the need instead ("the repo's deploy guidance").
• Length. Keep SKILL.md short, usually under 100 lines. Move long reference material to references/.
• Prose follows comms-technical-writing and comms-unslop. No emojis.