Install Anti-Slop Oxlint Rules
dmmulroy/anti-slop
Installs, updates or migrates the vendored anti-slop Oxlint plugin in a repository, keeping local rule changes and the plugin's license and provenance files.
Run precommit checks (lint, format, tests) on the mycelium codebase.
Install Precommit
$ npx skills add mycelium-io/mycelium --skill precommit -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mycelium-io/mycelium precommit --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/mycelium-io/mycelium.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/precommit .claude/skills/precommit && 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 "precommit" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/precommit into .claude/skills/precommit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit", 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/mycelium-io/mycelium/tree/main/.claude/skills/precommitType 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 mycelium-io/mycelium --skill precommit -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mycelium-io/mycelium precommit --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/precommit .agents/skills/precommit && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "precommit" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/precommit into .agents/skills/precommit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit", 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 mycelium-io/mycelium --skill precommit -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mycelium-io/mycelium precommit --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/precommit .cursor/skills/precommit && 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 "precommit" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/precommit into .cursor/skills/precommit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit", 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/mycelium-io/mycelium.git --path .claude/skills/precommit--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 mycelium-io/mycelium --skill precommit -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mycelium-io/mycelium precommit --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/precommit .gemini/skills/precommit && 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 "precommit" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/precommit into .gemini/skills/precommit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit", 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 mycelium-io/mycelium precommitInstalls 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 mycelium-io/mycelium --skill precommit -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/precommit .github/skills/precommit && 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 "precommit" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/precommit into .github/skills/precommit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit", 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 mycelium-io/mycelium --skill precommit -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mycelium-io/mycelium precommit --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/precommit .opencode/skills/precommit && 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 "precommit" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/precommit into .opencode/skills/precommit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit", 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
precommit- GitHub stars
- 119
- Token cost
- ~1.5k tokens
- SKILL.md length
- 631 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Run precommit checks (lint, format, tests) on the mycelium codebase.
- Works in 9 steps: Lint + format — Fix lint and format… → Type check (ty) — Both backend and CLI… → Backend tests — Run pytest → …
- The user says /precommit
- Calls uv, npx and docker
- Wants to check code quality before committing
What it does
Precommit is an agent skill from mycelium-io/mycelium. Run precommit checks (lint, format, tests) on the mycelium codebase. Use when the user says /precommit or wants to check code quality before committing.
Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Linting and formatting and Code quality. The repository describes itself as: Multi-agent coordination + persistent memory, semantic negotiation, async rooms, and a shared knowledge graph.
When your agent uses it
- The user says /precommit
- Wants to check code quality before committing
Example prompts
- “/precommit”
Requirements
- Python 3
- Node.js
- Docker
Workflow steps
9 steps, taken from the first numbered list in SKILL.md.
- Lint + format — Fix lint and format issues automatically
- Type check (ty) — Both backend and CLI must come back clean. CI gates on this
- Backend tests — Run pytest
- Frontend — Type-check, test, and build. All three: tsc and next build between them prove the app compiles, not that it behaves, and the…
- CLI docs — If any CLI command files were changed (mycelium-cli/src/mycelium/commands/)
- Generated OpenAPI clients — Two clients are vendored from live OpenAPI specs. CI gates on the mycelium one being current; the CFN one is…
- Docs consistency — If any user-facing behavior changed (commands renamed, new features, API changes), grep for stale references and fix…
- Doctor sanity check — If mycelium-cli/src/mycelium/commands/doctor.py was changed, run mycelium doctor to verify every check still passes…
- Report — Summarize what was fixed and any remaining issues.
What it can do on your machine
Read from SKILL.md and the folder at commit a45bca1. 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:
uvnpxdockernpmtsc
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv, npx, docker 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
Precommit loads about 1.5k tokens when it runs. Until then it costs about 41 tokens; SKILL.md has 631 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 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 631 words (~1,519 tokens).
“Run all quality checks on the mycelium codebase. Auto-fix issues where possible.”
- name
- precommit
Files
Just SKILL.md in .claude/skills/precommit of mycelium-io/mycelium.
Open the folder on GitHubat commit a45bca1
Compare with similar skills
Precommit 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 |
|---|---|---|---|---|---|---|
| Precommit this skillmycelium-io/mycelium | 119 | — | ~1.5k | Automated safety check: Pass | Custom licence | |
| Install Anti-Slop Oxlint Rulesdmmulroy/anti-slop | 5.2k | — | ~2.2k | Automated safety check: Pass | MIT | |
| Add Opik Code Quality Hookcomet-ml/opik | 22k | — | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| LobeHub Alint Rule Set Maintenancelobehub/lobehub | 83k | — | ~1.9k | Automated safety check: Pass | Custom licence | |
| Code Quality Gatefengshao1227/ccg-workflow | 5.9k | — | ~593 | Automated safety check: Notes | MIT | |
| Experiment Iterative CoderEvoScientist/EvoSkills | 474 | 3 repos | ~2.5k | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Precommit
What does Precommit do?
Run precommit checks (lint, format, tests) on the mycelium codebase. Precommit is an agent skill from mycelium-io/mycelium. Run precommit checks (lint, format, tests) on the mycelium codebase.
When should I use Precommit?
Precommit fits situations like: the user says /precommit; wants to check code quality before committing.
How do I install Precommit in Claude Code?
Run `npx skills add mycelium-io/mycelium --skill precommit -a claude-code`. Or copy the skill folder (.claude/skills/precommit in mycelium-io/mycelium) into .claude/skills/precommit in your project. Claude Code loads it when a task matches its description.
How do I install Precommit in Codex?
Run `npx skills add mycelium-io/mycelium --skill precommit -a codex`. Or copy the skill folder (.claude/skills/precommit in mycelium-io/mycelium) into .agents/skills/precommit in your project. Codex loads it when a task matches its description.
Can I use Precommit 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 mycelium-io/mycelium --skill precommit -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/precommit, .gemini/skills/precommit, .github/skills/precommit and .opencode/skills/precommit in your project.
What does Precommit need to run?
Going by SKILL.md and its folder, Precommit needs the command-line tools its instructions call (uv, npx, docker, npm and tsc). Our summary lists: Python 3; Node.js; Docker.
Does Precommit access the network?
SKILL.md contains no URLs. Its commands use uv, npx, docker and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Precommit 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 Precommit use?
Precommit has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Precommit use?
About 1.5k tokens (SKILL.md is roughly 6.1k 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 Precommit?
Skills that share tags, products or a category with Precommit: Install Anti-Slop Oxlint Rules (dmmulroy/anti-slop, 5.2k stars), Add Opik Code Quality Hook (comet-ml/opik, 22k stars), LobeHub Alint Rule Set Maintenance (lobehub/lobehub, 83k stars) and Code Quality Gate (fengshao1227/ccg-workflow, 5.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Precommit?
mycelium-io (a GitHub organization) maintains it in mycelium-io/mycelium, which has 119 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 7, 2026.
Source: mycelium-io/mycelium on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.