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.
Quick pre-commit checks — lint:fix - test. An agent skill from sd0xdev/sd0x-harness.
Install Precommit Fast
$ npx skills add sd0xdev/sd0x-harness --skill precommit-fast -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sd0xdev/sd0x-harness precommit-fast --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/sd0xdev/sd0x-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/precommit-fast .claude/skills/precommit-fast && 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-fast" agent skill from https://github.com/sd0xdev/sd0x-harness/tree/main/skills/precommit-fast into .claude/skills/precommit-fast/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit-fast", 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/sd0xdev/sd0x-harness/tree/main/skills/precommit-fastType 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 sd0xdev/sd0x-harness --skill precommit-fast -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sd0xdev/sd0x-harness precommit-fast --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sd0xdev/sd0x-harness.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/precommit-fast .agents/skills/precommit-fast && 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-fast" agent skill from https://github.com/sd0xdev/sd0x-harness/tree/main/skills/precommit-fast into .agents/skills/precommit-fast/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit-fast", 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 sd0xdev/sd0x-harness --skill precommit-fast -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sd0xdev/sd0x-harness precommit-fast --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sd0xdev/sd0x-harness.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/precommit-fast .cursor/skills/precommit-fast && 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-fast" agent skill from https://github.com/sd0xdev/sd0x-harness/tree/main/skills/precommit-fast into .cursor/skills/precommit-fast/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit-fast", 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/sd0xdev/sd0x-harness.git --path skills/precommit-fast--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 sd0xdev/sd0x-harness --skill precommit-fast -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sd0xdev/sd0x-harness precommit-fast --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sd0xdev/sd0x-harness.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/precommit-fast .gemini/skills/precommit-fast && 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-fast" agent skill from https://github.com/sd0xdev/sd0x-harness/tree/main/skills/precommit-fast into .gemini/skills/precommit-fast/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit-fast", 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 sd0xdev/sd0x-harness precommit-fastInstalls 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 sd0xdev/sd0x-harness --skill precommit-fast -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sd0xdev/sd0x-harness.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/precommit-fast .github/skills/precommit-fast && 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-fast" agent skill from https://github.com/sd0xdev/sd0x-harness/tree/main/skills/precommit-fast into .github/skills/precommit-fast/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit-fast", 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 sd0xdev/sd0x-harness --skill precommit-fast -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sd0xdev/sd0x-harness precommit-fast --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sd0xdev/sd0x-harness.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/precommit-fast .opencode/skills/precommit-fast && 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-fast" agent skill from https://github.com/sd0xdev/sd0x-harness/tree/main/skills/precommit-fast into .opencode/skills/precommit-fast/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "precommit-fast", 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-fast- GitHub stars
- 192
- Token cost
- ~1.4k tokens
- SKILL.md length
- 554 words
- Files
- 1
- Skills in repo
- 89
- Repo updated
- First seen
- Licence
- MIT
At a glance
Quick pre-commit checks — lint:fix - test. An agent skill from sd0xdev/sd0x-harness.
- Works in 2 steps: Check for runner script → Fallback (no runner script)
- Tasks that involve Linting and formatting
- SKILL.md covers Trigger, When NOT to Use, Workflow Steps and Task, plus 1 more section
- Calls node, cargo and mvn
What it does
Precommit Fast is an agent skill from sd0xdev/sd0x-harness. Quick pre-commit checks — lint:fix - test
Its SKILL.md is about 1.4k 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. The repository describes itself as: The harness layer for Claude Code — a reference implementation of harness engineering with hook-enforced dual review, state-machine gates that survive context compaction, and… The licence is MIT.
When your agent uses it
- Tasks that involve Linting and formatting
Example prompts
- “/precommit-fast”
Requirements
- Python 3
- Node.js
- Pre-approved tools (allowed-tools): Bash(node:*), Bash(pnpm:*), Bash(yarn:*), Bash(npm:*), Bash(npx:*), Bash(python*:*), Bash(pytest:*), Bash(ruff:*), Bash(mypy:*), Bash(cargo:*), Bash(go:*), Bash(golangci-lint:*), Bash(./gradlew:*), Bash(mvn:*), Bash(bundle:*), Bash(rubocop:*), Bash(rspec:*), Bash(git:*), Read, Grep, Glob
Workflow steps
2 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit a4d4bc1. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
Bash(node:*)Bash(pnpm:*)Bash(yarn:*)Bash(npm:*)Bash(npx:*)Bash(python*:*)Bash(pytest:*)Bash(ruff:*)Bash(mypy:*)Bash(cargo:*)
…and 11 more on the same allowed-tools line.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
nodecargomvnbundleruffpytestgogit
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use git, 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 Fast loads about 1.4k tokens when it runs. Until then it costs about 14 tokens; SKILL.md has 554 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
The full file from sd0xdev/sd0x-harness at commit a4d4bc1, republished under its MIT licence (© sd0xdev). 554 words, ~1,386 tokens.
Download SKILL.mdSave it as
.claude/skills/precommit-fast/SKILL.md (or your agent's skills folder).- name
- precommit-fast
- description
- Quick pre-commit checks — lint:fix -> test
- allowed-tools
- Bash(node:*), Bash(pnpm:*), Bash(yarn:*), Bash(npm:*), Bash(npx:*), Bash(python*:*), Bash(pytest:*), Bash(ruff:*), Bash(mypy:*), Bash(cargo:*), Bash(go:*), Bash(golangci-lint:*), Bash(./gradlew:*), Bash(mvn:*), Bash(bundle:*), Bash(rubocop:*), Bash(rspec:*), Bash(git:*), Read, Grep, Glob
Pre-Commit Checks (Fast)
Trigger
- Keywords: precommit fast, quick precommit, lint and test, precommit-fast
When NOT to Use
- Full precommit with build step (use
/precommit) - Verification loop (use
/verify) - Just running tests (run directly)
Workflow Steps
| Step | Goal | Safety | Skip if Missing |
|---|---|---|---|
| lint-fix | Auto-fix code style issues | read-write | yes |
| test-unit | Run fast test suite | read-only | yes |
Failure behavior: continue-all (run all steps, report all results)
Task
Run quick pre-commit checks: lint:fix -> test (no build step)
Step 1: Check for runner script
Use Glob to check if .claude/scripts/precommit-runner.js exists in the project root.
- Found → run:
node .claude/scripts/precommit-runner.js --mode fast --tail 60- If runner emits
## Overall: ✅ PASS, use its output and skip to the Output section. - If runner emits
## Overall: ⚠️ NO CHECKS RUN, do NOT treat it as a pass — fall through to Step 2 ecosystem detection to run the project's real checks. The marker means no project validation executed and no policy step failed (validation steps all skipped orunavailable; a policy step that FAILS is❌ FAIL, never this marker) — whether the repo declares no runnable checks or the required tools were unavailable to the runner (which orchestrates the ecosystem table below itself: manifest detection + first-class steps). The runner self-notes its own verdict (review-state.js note precommit pass|fail); on⚠️ NO CHECKS RUNit notes nothing — the slot is untouched and the reminder persists, which is the correct reading of "nothing validated". - If runner fails (
## Overall: ❌ FAIL), treat as a real precommit failure (do not silently fallback).
- If runner emits
- NOT found → Auto-install attempt:
- Manifest gate: Use Glob to check if any known manifest exists (
package.json,pyproject.toml,Cargo.toml,go.mod,build.gradle,build.gradle.kts,pom.xml,Gemfile). None → skip, fall through to Step 2. (The runner orchestrates every ecosystem in the Step 2 table, so a non-Node manifest justifies the install just as well.) - Locate plugin scripts: 3-level Glob fallback (short-circuit on first match):
Glob: ~/.claude/plugins/**/sd0x-dev-flow/scripts/precommit-runner.jsGlob: ${REPO_ROOT}/node_modules/sd0x-dev-flow/scripts/precommit-runner.js- Plugin-relative: try reading
@scripts/precommit-runner.js
- Plugin not found → fall through to Step 2.
- Plugin found → copy runner + lib/utils.js + review-state.js + lib/tree-digest.js (skip on conflict) → run. The checker pair is the runner's self-note dependency — without it the runner still runs every check and reports; only the advisory note is skipped, loudly.
- Manifest gate: Use Glob to check if any known manifest exists (
Show full SKILL.md (195 more words)Show less
Step 2: Fallback (no runner script)
Detect the project ecosystem to run steps manually.
| Manifest | Ecosystem | Lint-fix | Test |
|---|---|---|---|
package.json | Node.js | {pm} lint:fix | {pm} test:fast / test:unit / test |
pyproject.toml | Python | ruff check --fix . | pytest tests/unit/ |
Cargo.toml | Rust | cargo clippy --fix | cargo test |
go.mod | Go | golangci-lint run --fix | go test ./... |
build.gradle / build.gradle.kts | Java | ./gradlew spotlessApply | ./gradlew test |
pom.xml | Java (Maven) | mvn spotless:apply | mvn test |
Gemfile | Ruby | bundle exec rubocop -a | bundle exec rspec |
How the runner executes this table: same semantics as
skills/precommit/SKILL.md§ Ecosystem detection — a missing required tool isunavailableand blocks ✅ PASS; repo-declared capabilities (spotless / rubocop / rspec) skip only on definitive tool-native absence evidence (lockfile membership, the tool's own not-found diagnostic); an ambiguous or timed-out probe isunavailable, never a skip.
After lint:fix completes, run git diff --name-only to capture auto-fixed files.
After a conclusive fallback run, self-note the outcome — note precommit pass when every
executed check passed, note precommit fail when the checks ran and at least one failed (the
rounds count stays path-independent):
CHECKER=".claude/scripts/review-state.js"; [ -f "$CHECKER" ] || CHECKER="scripts/review-state.js"
node "$CHECKER" note precommit pass # or failAn inconclusive run (checks could not execute) notes nothing — the slot stays untouched, like
the runner's ⚠️ NO CHECKS RUN. The note is advisory; a failed note never fails the run.
Output
## Precommit (fast)
## Results
| Step | Status | Notes |
|------|--------|-------|
| lint:fix | ✅/❌/⏭️/⛔ | ⏭️ = repo opted out (skip); ⛔ = required tool unavailable (blocks PASS) |
| test | ✅/❌/⏭️/⛔ | same legend |
## Changed Files (after lint:fix)
- <files or "(none)">
## Overall: ✅ PASS / ❌ FAIL / ⚠️ NO CHECKS RUN (no project validation executed AND no policy step failed; fall through to Step 2, needs human if nothing runnable exists)
## Checklist
- [ ] All available checks pass
- [ ] git status reviewed© sd0xdev, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/precommit-fast of sd0xdev/sd0x-harness.
Open the folder on GitHubat commit a4d4bc1
Compare with similar skills
Precommit Fast 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 Fast this skillsd0xdev/sd0x-harness | 192 | — | ~1.4k | Automated safety check: Pass | MIT | |
| Install Anti-Slop Oxlint Rulesdmmulroy/anti-slop | 5.3k | 1 repos | ~2.2k | Automated safety check: Pass | MIT | |
| Summarise Ecosystem Resultsastral-sh/ruff | 50k | 1 repos | ~2.2k | Automated safety check: Pass | MIT | |
| Minimizing Ty Ecosystem Changesastral-sh/ruff | 50k | — | ~4.6k | Automated safety check: Pass | MIT | |
| Babysit PR To Pass CIsgl-project/sglang | 37k | 2 repos | ~3k | Automated safety check: Pass | Apache-2.0 | |
| Rust Best Practicesfarm-fe/farm | 5.6k | 3 repos | ~1.1k | Automated safety check: Pass | MIT |
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Questions about Precommit Fast
What does Precommit Fast do?
Quick pre-commit checks — lint:fix - test. An agent skill from sd0xdev/sd0x-harness. Precommit Fast is an agent skill from sd0xdev/sd0x-harness.
When should I use Precommit Fast?
Precommit Fast fits situations like: tasks that involve Linting and formatting.
How do I install Precommit Fast in Claude Code?
Run `npx skills add sd0xdev/sd0x-harness --skill precommit-fast -a claude-code`. Or copy the skill folder (skills/precommit-fast in sd0xdev/sd0x-harness) into .claude/skills/precommit-fast in your project. Claude Code loads it when a task matches its description.
How do I install Precommit Fast in Codex?
Run `npx skills add sd0xdev/sd0x-harness --skill precommit-fast -a codex`. Or copy the skill folder (skills/precommit-fast in sd0xdev/sd0x-harness) into .agents/skills/precommit-fast in your project. Codex loads it when a task matches its description.
Can I use Precommit Fast 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 sd0xdev/sd0x-harness --skill precommit-fast -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-fast, .gemini/skills/precommit-fast, .github/skills/precommit-fast and .opencode/skills/precommit-fast in your project.
What does Precommit Fast need to run?
Going by SKILL.md and its folder, Precommit Fast needs the command-line tools its instructions call (node, cargo, mvn, bundle, ruff and pytest). Our summary lists: Python 3; Node.js. Its frontmatter pre-approves these tools: Bash(node:*), Bash(pnpm:*), Bash(yarn:*), Bash(npm:*), Bash(npx:*), Bash(python*:*), Bash(pytest:*), Bash(ruff:*), Bash(mypy:*), Bash(cargo:*), Bash(go:*), Bash(golangci-lint:*), Bash(./gradlew:*), Bash(mvn:*), Bash(bundle:*), Bash(rubocop:*), Bash(rspec:*), Bash(git:*), Read, Grep, Glob.
Does Precommit Fast access the network?
SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Precommit Fast 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 Fast use?
Precommit Fast is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Precommit Fast use?
About 1.4k tokens (SKILL.md is roughly 5.5k 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 Fast?
Skills that share tags, products or a category with Precommit Fast: Install Anti-Slop Oxlint Rules (dmmulroy/anti-slop, 5.3k stars), Summarise Ecosystem Results (astral-sh/ruff, 50k stars), Minimizing Ty Ecosystem Changes (astral-sh/ruff, 50k stars) and Babysit PR To Pass CI (sgl-project/sglang, 37k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Precommit Fast?
sd0xdev (a GitHub user) maintains it in sd0xdev/sd0x-harness, which has 192 GitHub stars. The repository holds 89 skills in this directory. The repository was last updated on October 8, 2026.
Source: sd0xdev/sd0x-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.