Analyze GitHub Action Logs
withastro/astro
Analyze recent GitHub Actions workflow runs to identify patterns, mistakes, and improvements.
Reference for the just command runner — justfile syntax and GitHub Actions integration.
Install Justfile
$ npx skills add mizchi/skills --skill justfile -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mizchi/skills justfile --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/justfile .claude/skills/justfile && rm -rf skills-srcUse ~/.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/
Install the "justfile" agent skill from https://github.com/mizchi/skills/tree/main/justfile into .claude/skills/justfile/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "justfile", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mizchi/skills/tree/main/justfileType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mizchi/skills --skill justfile -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mizchi/skills justfile --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/justfile .agents/skills/justfile && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "justfile" agent skill from https://github.com/mizchi/skills/tree/main/justfile into .agents/skills/justfile/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "justfile", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mizchi/skills --skill justfile -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mizchi/skills justfile --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/justfile .cursor/skills/justfile && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "justfile" agent skill from https://github.com/mizchi/skills/tree/main/justfile into .cursor/skills/justfile/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "justfile", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mizchi/skills.git --path justfile--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mizchi/skills --skill justfile -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mizchi/skills justfile --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/justfile .gemini/skills/justfile && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "justfile" agent skill from https://github.com/mizchi/skills/tree/main/justfile into .gemini/skills/justfile/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "justfile", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mizchi/skills justfileInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mizchi/skills --skill justfile -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/justfile .github/skills/justfile && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "justfile" agent skill from https://github.com/mizchi/skills/tree/main/justfile into .github/skills/justfile/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "justfile", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mizchi/skills --skill justfile -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mizchi/skills justfile --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/justfile .opencode/skills/justfile && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "justfile" agent skill from https://github.com/mizchi/skills/tree/main/justfile into .opencode/skills/justfile/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "justfile", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
justfile- GitHub stars
- 359
- Token cost
- ~789 tokens
- SKILL.md length
- 65 words
- Files
- 5 (incl. assets)
- Skills in repo
- 69
- Repo updated
- First seen
- Licence
- None found
At a glance
Reference for the just command runner — justfile syntax and GitHub Actions integration.
- An existing repo already has a justfile and tasks must be added
- SKILL.md covers Basic Syntax, Variables, Settings and Conditionals, plus 5 more sections
- Calls just
- Tasks that involve CI/CD
What it does
Justfile is an agent skill from mizchi/skills. Reference for the just command runner — justfile syntax and GitHub Actions integration. Use when an existing repo already has a justfile and tasks must be added, modified, or audited. For new mizchi-owned repos, prefer the pkfire skill (Taskfile.pkl + pkf) instead; justfile is kept only for compatibility with existing repos.
Its SKILL.md is about 790 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including assets (for example `.claude-plugin/manifest.json`, `README.md` and `assets/gh_action_example.yaml`).
It sits in DevOps & Cloud, covering CI/CD. It works with GitHub Actions. The repository describes itself as: Agent skills by mizchi, distributed via APM.
When your agent uses it
- An existing repo already has a justfile and tasks must be added
- Tasks that involve CI/CD
Example prompts
- “/justfile”
Requirements
- Python 3
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:
just
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
github.comjust.systems
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
Justfile loads about 789 tokens when it runs. Until then it costs about 86 tokens; SKILL.md has 65 words of instructions outside code blocks.
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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteMentions a .env fileSKILL.md:61
# Load .env
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 65 words (~789 tokens).
“just is a command runner for project-specific commands. Similar to Make but simpler.”
- name
- justfile
Files
SKILL.md and 4 other files (assets) in justfile of mizchi/skills.
- SKILL.md
- .claude-plugin/manifest.json
- README.md
- assets/gh_action_example.yaml
- assets/justfile
Open the folder on GitHubat commit 62f5808
Compare with similar skills
Justfile 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Justfile this skillmizchi/skills | 359 | — | ~789 | Automated safety check: Notes | None | |
| Analyze GitHub Action Logswithastro/astro | 63k | 1 repos | ~1.3k | Automated safety check: Pass | Custom licence | |
| GitHub Actions Templatesbartstc/vite-ts-react-template | 122 | 14 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Nushellccusage/ccusage | 19k | — | ~938 | Automated safety check: Pass | Custom licence | |
| Repo Hygiene Scan and FixQwenLM/qwen-code | 28k | — | ~1.7k | Automated safety check: Pass | Apache-2.0 | |
| Senior DevOps Toolkitmaslennikov-ig/claude-code-orchestrator-kit | 260 | 6 repos | ~1.1k | Automated safety check: Notes | Custom licence |
Similar skills
- Official
GitHub Actions Templates
bartstc/vite-ts-react-template
Create production-ready GitHub Actions workflows for automated testing, building, and deploying applications.
Nushell
ccusage/ccusage
Guides ccusage Nushell scripts. An agent skill from ccusage/ccusage.
Repo Hygiene Scan and Fix
QwenLM/qwen-code
Scheduled CI skill that scans a repository for small, certain docs, test and code hygiene issues and fixes them on one branch with a commit per finding.
Senior DevOps Toolkit
maslennikov-ig/claude-code-orchestrator-kit
Comprehensive DevOps skill for CI/CD, infrastructure automation, containerization, and cloud platforms (AWS, GCP, Azure). Includes pipeline setup…
CI Failure Triage and Repair
Chachamaru127/claude-code-harness
Diagnoses failing CI pipelines and tests, deciding first whether the test or the implementation is at fault, and hands hard cases to a dedicated fixer subagent.
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Related
Works with
Categories
Questions about Justfile
What does Justfile do?
Reference for the just command runner — justfile syntax and GitHub Actions integration. Justfile is an agent skill from mizchi/skills. Reference for the just command runner — justfile syntax and GitHub Actions integration.
When should I use Justfile?
Justfile fits situations like: an existing repo already has a justfile and tasks must be added; tasks that involve CI/CD.
How do I install Justfile in Claude Code?
Run `npx skills add mizchi/skills --skill justfile -a claude-code`. Or copy the skill folder (justfile in mizchi/skills) into .claude/skills/justfile in your project. Claude Code loads it when a task matches its description.
How do I install Justfile in Codex?
Run `npx skills add mizchi/skills --skill justfile -a codex`. Or copy the skill folder (justfile in mizchi/skills) into .agents/skills/justfile in your project. Codex loads it when a task matches its description.
Can I use Justfile 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 justfile -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/justfile, .gemini/skills/justfile, .github/skills/justfile and .opencode/skills/justfile in your project.
What does Justfile need to run?
Going by SKILL.md and its folder, Justfile needs the command-line tools its instructions call (just). Our summary lists: Python 3.
Does Justfile access the network?
SKILL.md names 2 domains. As links in the text: github.com and just.systems. This is read from the text; nothing was executed.
Is Justfile safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Justfile use?
No licence was found for Justfile or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Justfile use?
About 789 tokens (SKILL.md is roughly 3.2k 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 Justfile?
Skills that share tags, products or a category with Justfile: Analyze GitHub Action Logs (withastro/astro, 63k stars), GitHub Actions Templates (bartstc/vite-ts-react-template, 122 stars), Nushell (ccusage/ccusage, 19k stars) and Repo Hygiene Scan and Fix (QwenLM/qwen-code, 28k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Justfile?
mizchi (a GitHub user) maintains it in mizchi/skills, which has 359 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.