Guide · Agent skill
How to use the GitHub Actions Workflow Spec Writer agent skill
Updated · written with AI from the project's own documentation and checked against our catalogue data
This guide shows you how to use the create-github-action-workflow-specification skill, which tells an AI agent to read an existing GitHub Actions workflow file and write a formal specification of it. It is aimed at people who have not used agent skills before. By the end you will know what the skill produces, how to install it, how to ask for a spec in plain language, and what to check before you rely on the output.
GitHub Actions Workflow Spec Writergithub/awesome-copilot · MIT Download the skill Quick start
- 1Download the ZIP. Download the skill ZIP from this page.
- 2Unzip into a skills folder. Unzip it into ~/.claude/skills/ for personal use or .claude/skills/ inside a project.
- 3Or upload in the Claude apps. Go to Settings → Capabilities → Skills and upload the skill there.
- 4Point the agent at a workflow file. Give the agent the path to your GitHub Actions workflow file, such as one under .github/workflows.
- 5Ask for a specification. Request a formal specification of the existing workflow in plain language.
- 6Review and correct the output. Check the triggers, jobs, secrets and placeholder targets against the real workflow and your systems.
- 7Save and maintain the spec. Save the document in your repository and update it when the workflow changes.
What the skill makes the agent do
The skill is a set of text-generation instructions. When you point the agent at a GitHub Actions workflow file, it reads that file and writes a structured specification document describing what the workflow does. The source template covers workflow overview, an execution flow diagram, jobs and dependencies, requirements, inputs and outputs, secrets and variables, execution constraints, error handling, quality gates, monitoring, integration points, compliance, edge cases, validation criteria and change management.
The skill does not run the workflow and does not change any code. It only produces the document. The spec is written to be implementation-neutral, so it describes behaviour rather than exact YAML syntax, which helps it stay useful as the workflow changes.
- Output is a static Markdown document built from the workflow file's contents.
- The template uses tables and a Mermaid flow diagram.
- The skill suggests saving the result as /spec/spec-process-cicd-[workflow-name].md.
Install the skill from the ZIP download
Download the ZIP for this skill from this page. The skill is distributed as a folder that contains a single file, SKILL.md. Unzip it so the skill folder ends up in one of two places. For a personal install, use ~/.claude/skills/. For a single project, use the .claude/skills/ folder inside that project.
If you use the Claude apps instead, you can upload the skill under Settings → Capabilities → Skills rather than placing files by hand.
- Personal install: unzip into ~/.claude/skills/
- Project install: unzip into .claude/skills/ in your project root
- Claude apps: upload under Settings → Capabilities → Skills
Trigger the skill with a natural request
You do not need a special command. Name the workflow file and ask for a specification. The skill's own prompt refers to the workflow file as an input, so give the agent the file path or attach the file in your request. Phrases such as 'write a spec for this workflow' or 'document the CI pipeline in .github/workflows as a specification' should be enough to match the skill's description, which is about creating a formal specification for an existing GitHub Actions CI/CD workflow.
Ask for changes to the output in the same conversation. For example, you can ask the agent to fill in the jobs table, or to add a diagram for a workflow with more than five jobs, since the guidelines recommend subgraphs in that case.
- Good: 'Create a specification for .github/workflows/deploy.yml'
- Good: 'Document this CI/CD workflow as a spec I can hand to an AI assistant later'
- Better to include the file path or the file itself so the agent reads the right workflow
Review the output before you rely on it
The template contains many placeholder metrics and targets, such as success rates, execution time and coverage percentages. The author must check these against reality. Anything the workflow file does not state should be treated as a gap to fill in, not a fact.
Because the spec is a static snapshot, it can drift as the workflow changes. Re-run the skill or update the document when the workflow changes significantly.
- Check every placeholder metric, target and alert against your real systems.
- Confirm the job dependency diagram matches the workflow file.
- Note the version and date fields in the template and update them when you revise the spec.
Safety notes: scripts and network
According to the listing, this skill requires nothing beyond the agent itself, runs no scripts and uses no network access. Its only file is SKILL.md. That makes it low risk to install, but you should still read the file yourself, since it is the instruction set the agent follows.
Keep in mind that the workflow file you give the agent may contain sensitive details, such as secret names, environment settings and deployment targets. Check what you are sharing with the agent, and follow your organisation's policy for that material.
- Requirements: none listed
- Runs scripts: no
- Uses network: no
- Read SKILL.md before installing and check the workflow content you share
What people use it for
- Documenting an inherited CI/CD pipeline that nobody on the current team wrote.
- Preparing maintenance or audit documentation for a set of deployment workflows.
- Creating a reference spec to hand to an AI assistant before asking it to change a workflow.
- Mapping job dependencies and quality gates in a complex pipeline with a Mermaid flow diagram.
Frequently asked questions
Is the create-github-action-workflow-specification skill free?
The skill is published under the MIT licence, as listed on this page. The source does not mention pricing for the Claude apps or other tools you may use alongside it.
What do I need to use this skill?
The listing states that no requirements are listed, and that it runs no scripts and uses no network. You need an AI agent that supports skills, and a GitHub Actions workflow file to document.
Where do I put the skill files?
Unzip the downloaded ZIP into ~/.claude/skills/ for a personal install, or into .claude/skills/ in a project. You can also upload it under Settings → Capabilities → Skills in the Claude apps.
Can this skill write a new GitHub Actions workflow for me?
No. The skill documents an existing workflow rather than creating one. It reads the file you provide and produces a specification of what it does.
Will the spec stay up to date automatically?
No. The output is a static document written from the file's contents and can drift as the workflow changes. You need to regenerate or update it yourself.
Does the skill validate my workflow or run it?
No. The skill is text-generation guidance only. It does not run the workflow, validate it, or change any code. The template's metrics and targets must be checked by the author.
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Our verdict
This skill suits engineering teams, DevOps leads and developers who need documentation for an inherited or complex GitHub Actions pipeline, or a reference spec to give an AI assistant before making changes. It is a poor fit if you need a live, auto-synced diagram, validation of the workflow, or help writing a new workflow from scratch. Treat the output as a draft to verify against the real workflow and your systems.
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