Github Actions Matrix Patterns

Q: What is a Claude Code skill and how does the Github Actions Matrix Patterns skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Github Actions Matrix Patterns is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: devops · Last updated: 2026-06-08

cloud:cloudflare tool:github

Use when designing matrix builds (OS x version x dimension), composing reusable workflows, gating jobs on conditions, doing OIDC to AWS/GCP/Cloudflare without long-lived secrets, sharding tests across runners, or fixing cache invalidation. Triggers: workflow_call between repos, fail-fast: false tradeoffs, exclude/include matrix surgery, environment protection rules, OIDC trust policy setup, concurrency cancellation on duplicate pushes, artifact reuse across jobs, conditional job matrices computed at runtime. NOT for GitLab CI / CircleCI / Jenkins (different yaml dialects), self-hosted runner administration, or local act dev.

About this skill (catalog notes)

Github Actions Matrix Patterns includes 11 code blocks for direct copy-paste. The SKILL.md runs to about 1,126 words, in the catalog's typical mid-range.

Original author: curiositech
Indexed lastmod: 2026-06-08
Catalog position: Engineering · devops
Indexed related skills: 10

How Github Actions Matrix Patterns fits the catalog

Github Actions Matrix Patterns sits in the Engineering category under the devops sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Hello-world Actions are easy. Real CI gets stuck on three things: matrix expansion that runs the wrong cells, OIDC trust policies that reject your cloud auth, and cache keys that never invalidate (or invalidate on every commit). This skill catalogs those.

What this skill does

Github Actions Matrix Patterns is a community-contributed Claude Code skill in the devops sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/github-actions-matrix-patterns/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when designing matrix builds (OS x version x dimension), composing reusable workflows, gating jobs on conditions, doing OIDC to AWS/GCP/Cloudflare without long-lived secrets, sharding tests across runners, or fixing cache invalidation. Triggers: workflow_call between repos, fail-fast: false tradeoffs, exclude/include matrix surgery, environment protection rules, OIDC trust policy setup, concurrency cancellation on duplicate pushes, artifact reuse across jobs, conditional job matrices computed at runtime.

Who uses this skill

The Github Actions Matrix Patterns Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 97,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/github-actions-matrix-patterns
curl -L https://claudskills.com/skills/github-actions-matrix-patterns/SKILL.md \
  -o ~/.claude/skills/github-actions-matrix-patterns/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/github-actions-matrix-patterns/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/github-actions-matrix-patterns/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\github-actions-matrix-patterns\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Github Actions Matrix Patterns Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/github-actions-matrix-patterns/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Github Actions Matrix Patterns skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Github Actions Matrix Patterns skill?

Use Github Actions Matrix Patterns when your Claude Code task falls under the Engineering category — specifically in the devops area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Github Actions Matrix Patterns" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Github Actions Matrix Patterns skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Github Actions Matrix Patterns is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/curiositech/windags-skills/blob/HEAD/skills/github-actions-matrix-patterns/SKILL.md
Author: curiositech

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

curiositech. (2026). Github Actions Matrix Patterns [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/github-actions-matrix-patterns/

BibTeX

@misc{github-actions-matrix-patterns-2026,
  author    = {curiositech},
  title     = {Github Actions Matrix Patterns [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/github-actions-matrix-patterns/}
}

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