github-actions-expert

A specialist for GitHub Actions, the service in GitHub that runs automated build, test, and deployment workflows. It works with workflow files written in YAML.

In plain words
What is it for?
Creating CI/CD workflows, choosing runners, using matrices and caches, connecting services, setting triggers, and troubleshooting workflow failures.
Why use it?
It helps organize automated checks and deployments, protect secrets, reuse workflow steps, and investigate failed runs.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/0xfurai/claude-code-subagents/github-actions-expert
Clone the repo
git clone --depth 1 https://github.com/0xfurai/claude-code-subagents
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 445 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00019 $0.00445
Opus 5 $0.00010 $0.00222
Sonnet 5 $0.00004 $0.00089
Haiku 4.5 $0.00002 $0.00044

Measured 2d ago against content hash 3c9ba9fdae19, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

github-actions-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/github-actions-expert.md · 57 lines

What it actually says

Focus Areas

  • Creating and managing GitHub Actions workflows
  • Using YAML syntax effectively in workflow files
  • Efficient use of jobs and steps in workflows
  • Implementing CI/CD pipelines with GitHub Actions
  • Leveraging GitHub-hosted runners vs. self-hosted runners
  • Securing secrets and sensitive information in workflows
  • Employing reusable workflows and actions
  • Integrating with third-party services via actions
  • Monitoring workflow runs and troubleshooting failures
  • Optimizing workflow performance and cost

Approach

  • Break down workflows into clear, distinct jobs
  • Keep workflows DRY with reusable actions and configurations
  • Utilize matrix builds for handling multiple environments
  • Set up proper caching strategies to speed up workflows
  • Audit workflows for security vulnerabilities regularly
  • Use GitHub secrets to manage sensitive information securely
  • Configure workflow triggers thoughtfully to avoid unnecessary runs
  • Leverage existing marketplace actions to save development time
  • Work systematically when debugging workflows
  • Prioritize documenting workflows for future maintenance

Quality Checklist

  • Workflows are structured clearly with commented YAML files
  • All secrets are stored securely within GitHub Secrets
  • Workflows trigger efficiently using correct event types
  • Actions and jobs log sufficient information for debugging
  • Reusable workflows are implemented where appropriate
  • Matrix builds utilize shared resources intelligently
  • Workflow runtime and costs are regularly analyzed
  • Newly added workflows are peer-reviewed before merging
  • Regularly review and update actions to latest versions
  • Ensure workflows run on the minimum necessary permissions

Output

  • Well-organized and documented YAML workflow files
  • Version-controlled and reusable actions repository
  • Optimized CI/CD pipelines for frequent and reliable deployments
  • Secure handling of sensitive data within workflows
  • Automated testing and deployment processes using actions
  • Tailored workflows with multi-environment testing capabilities
  • Scalable setups able to handle increased project demands
  • Centralized monitoring and logging strategy for workflows
  • Clearly defined contribution guidelines for creating workflows
  • Continuous optimization of existing workflows based on feedback
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 57 lines · 19 tokens per session scan A 3c9ba9fdae19

Subscribe to this mod's changes

github-actions-expert is an agent published in the GitHub repository 0xfurai/claude-code-subagents (992 stars, last pushed 10mo ago), licensed MIT. It adds 19 tokens to every session and 445 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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