biome

biome is a skill for Claude Code, Codex from ashish7802/awesome-api-skills. It costs 0 tokens per session (676 once invoked), scanned A, original, MIT.

A single tool for checking JavaScript and related web code for style problems and automatically formatting it. It is presented as a replacement for separate ESLint and Prettier setups.

In plain words
What is it for?
Use it to format code, find style and code-quality issues, initialize project configuration, and run checks in a continuous-integration pipeline.
Why use it?
It removes the need to configure and run separate linting and formatting tools. Consistent checks can also be added to local development and automated build checks.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to format code, find style and code-quality issues, initialize project configuration, and run checks in a continuous-integration pipeline.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ashish7802/awesome-api-skills/biome
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.

Any agent
npx skills add ashish7802/awesome-api-skills --skill biome
Clone the repo
git clone --depth 1 https://github.com/ashish7802/awesome-api-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for biome

README.md
[![agentmods](https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/biome/github.svg)](https://agentmods.dev/skills/ashish7802/awesome-api-skills/biome)
Your own site
<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/biome"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/biome/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for biome

Your own site · 80×15
<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/biome"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/biome.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 676 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium MCP Rug Pull · line 32
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium MCP Rug Pull · line 37
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
How audits are shown
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 5.1 $0.00000 $0.00676
Opus 5 $0.00000 $0.00338
Sonnet 5 $0.00000 $0.00135
Haiku 4.5 $0.00000 $0.00068

Measured 10d ago against content hash 359ce9dfe30e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

biome 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 10d 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.

skills/biome/SKILL.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Biome Skill

One toolchain for your web project.

Ecosystem Graph Preview

graph LR
  biome["biome"]:::core
  classDef core fill:#f9f,stroke:#333,stroke-width:4px;
  biome -- "replaces" --> eslint
  biome -- "replaces" --> prettier
  biome -- "works well with" --> typescript
  eslint -- "alternative to" --> biome
  prettier -- "alternative to" --> biome
  • eslint (Score: 0.95) Why: Direct relationship, Both are Developer Tools, Shared ecosystem (javascript), Can deploy to any, Similar network profile
  • prettier (Score: 0.92) Why: Direct relationship, Both are Developer Tools, Shared ecosystem (javascript), Can deploy to any, Similar network profile
  • bullmq (Score: 0.35) Why: Both are Developer Tools, Shared ecosystem (javascript), Logical next step

Quick Start

Biome is a high-performance toolchain written in Rust that completely replaces ESLint and Prettier. It formats and lints code in milliseconds.

npm install --save-dev --save-exact @biomejs/biome
npx @biomejs/biome init

Production Patterns

CI Pipeline Integration

Replace slow npm run lint and npm run format:check steps in your GitHub Actions with npx @biomejs/biome ci .. It runs both formatting and linting concurrently in a fraction of a second.

Architecture & Scaling

Rust Native

Because Biome is a compiled Rust binary, it completely bypasses the V8 Node.js runtime overhead, resulting in 35x faster execution times compared to standard JS-based tooling.

Error Recovery

If Biome conflicts with your IDE's built-in TypeScript formatter, ensure you have the official Biome extension installed and set it as the default formatter in .vscode/settings.json.

Security Notes

Biome does not execute third-party plugins (unlike ESLint). This eliminates the supply chain attack vector of malicious linting rules stealing environment variables during the build process.

Read the full file on GitHub · 72 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 10d ago First seen · 72 lines · 0 tokens per session scan A 359ce9dfe30e

Subscribe to this mod's changes

biome is a skill published in the GitHub repository ashish7802/awesome-api-skills (13 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 676 tokens. 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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