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Agent skill

Actions CI Tuning

by mizchi in mizchi/skills

A skill your agent uses when auditing or improving GitHub Actions workflows for a project.

No licenceAuto-check passedTesting & QA

Install Actions CI Tuning

skills CLI
$ npx skills add mizchi/skills --skill actions-ci-tuning -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mizchi/skills actions-ci-tuning --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/actions-ci-tuning .claude/skills/actions-ci-tuning && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
actions-ci-tuning
GitHub stars
360
Token cost
~2.6k tokens
SKILL.md length
866 words
Files
2
Skills in repo
69
Repo updated
First seen
Licence
None found

At a glance

A skill your agent uses when auditing or improving GitHub Actions workflows for a project.

  • Works in 5 steps: Inventory — list all… → Audit against checklist — run through… → Prioritise — group findings by impact:… → …
  • Improving GitHub Actions workflows for a project
  • SKILL.md covers Workflow, Checklist, Quick Audit Commands and Common Anti-Patterns
  • Calls gh, jq and pnpm

What it does

Actions CI Tuning is an agent skill from mizchi/skills. Use when auditing or improving GitHub Actions workflows for a project. Covers cache setup (npm/pnpm/yarn), job parallelism, shard-based test splitting, artifact handling pitfalls, and Playwright-specific patterns. Trigger on: slow CI, cache miss, flaky shard jobs, merge-reports failures, or an explicit 'tune CI' request.

Its SKILL.md is about 2.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `README.md`).

It sits in Testing & QA, covering CI/CD and Browser testing. It works with GitHub Actions, Playwright, pnpm and npm. The repository describes itself as: Agent skills by mizchi, distributed via APM.

When your agent uses it

  • Improving GitHub Actions workflows for a project
  • Flaky shard jobs
  • Merge-reports failures
  • An explicit tune CI request

Example prompts

  • “tune CI”
  • “/actions-ci-tuning”

Requirements

  • Node.js
  • Docker

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Inventory — list all .github/workflows/*.yml files and their trigger events, jobs, and rough durations (gh run list --workflow --limit 5).
  2. Audit against checklist — run through each section below and flag every gap.
  3. Prioritise — group findings by impact: correctness bugs > cache misses > parallelism gains > cosmetic.
  4. Propose changes — draft minimal diffs; do not refactor unrelated parts.
  5. Verify — after applying, confirm via gh run list that the next run is green and faster.

What it can do on your machine

Read from SKILL.md and the folder at commit 62f5808. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • gh
    • jq
    • pnpm
    • playwright
    • npm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use gh, pnpm and npm, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Actions CI Tuning loads about 2.6k tokens when it runs. Until then it costs about 85 tokens; SKILL.md has 866 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~85
When it runs · the whole SKILL.md, loaded when a task matches
~2.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 866 words (~2,555 tokens).

“Audit and improve GitHub Actions workflows. Focus on correctness first (jobs that error rather than fail), then speed (cache, parallelism), then reliability (flakiness, artifact guards).”

— opening of SKILL.md by mizchi
name
actions-ci-tuning

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in actions-ci-tuning of mizchi/skills.

  • SKILL.md
  • README.md

Open the folder on GitHubat commit 62f5808

Compare with similar skills

Actions CI Tuning next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Actions CI Tuning compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Actions CI Tuning this skillmizchi/skills360—~2.6kAutomated safety check: PassNone
Playwright CI CachingAaronontheweb/dotnet-skills1.2k1 repos~1.7kAutomated safety check: PassMIT
Testing Test Automation Engineerchendongqi/OPB-Skills126—~3.1kAutomated safety check: PassNone
Debug Playwright Prowquay/quay2.8k—~2.2kAutomated safety check: PassApache-2.0
Debug Playwrightquay/quay2.8k—~1.2kAutomated safety check: PassApache-2.0
UI Previewtingly-dev/tingly-box351—~2kAutomated safety check: NotesMPL-2.0

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Works with

Categories

Questions about Actions CI Tuning

What does Actions CI Tuning do?

A skill your agent uses when auditing or improving GitHub Actions workflows for a project. Actions CI Tuning is an agent skill from mizchi/skills. Use when auditing or improving GitHub Actions workflows for a project.

When should I use Actions CI Tuning?

Actions CI Tuning fits situations like: improving GitHub Actions workflows for a project; flaky shard jobs; merge-reports failures; an explicit tune CI request.

How do I install Actions CI Tuning in Claude Code?

Run `npx skills add mizchi/skills --skill actions-ci-tuning -a claude-code`. Or copy the skill folder (actions-ci-tuning in mizchi/skills) into .claude/skills/actions-ci-tuning in your project. Claude Code loads it when a task matches its description.

How do I install Actions CI Tuning in Codex?

Run `npx skills add mizchi/skills --skill actions-ci-tuning -a codex`. Or copy the skill folder (actions-ci-tuning in mizchi/skills) into .agents/skills/actions-ci-tuning in your project. Codex loads it when a task matches its description.

Can I use Actions CI Tuning in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mizchi/skills --skill actions-ci-tuning -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/actions-ci-tuning, .gemini/skills/actions-ci-tuning, .github/skills/actions-ci-tuning and .opencode/skills/actions-ci-tuning in your project.

What does Actions CI Tuning need to run?

Going by SKILL.md and its folder, Actions CI Tuning needs the command-line tools its instructions call (gh, jq, pnpm, playwright and npm). Our summary lists: Node.js; Docker.

Does Actions CI Tuning access the network?

SKILL.md contains no URLs. Its commands use gh and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Actions CI Tuning safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Actions CI Tuning use?

No licence was found for Actions CI Tuning or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Actions CI Tuning use?

About 2.6k tokens (SKILL.md is roughly 10k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Actions CI Tuning?

Skills that share tags, products or a category with Actions CI Tuning: Playwright CI Caching (Aaronontheweb/dotnet-skills, 1.2k stars), Testing Test Automation Engineer (chendongqi/OPB-Skills, 126 stars), Debug Playwright Prow (quay/quay, 2.8k stars) and Debug Playwright (quay/quay, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Actions CI Tuning?

mizchi (a GitHub user) maintains it in mizchi/skills, which has 360 GitHub stars. The repository holds 69 skills in this directory. The repository was last updated on October 2, 2026.

Source: mizchi/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.