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.
npx skills add pledgeandgrow/pledge-skills --skill biomegit clone --depth 1 https://github.com/pledgeandgrow/pledge-skillsWrote 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.
[](https://agentmods.dev/skills/pledgeandgrow/pledge-skills/biome)<a href="https://agentmods.dev/skills/pledgeandgrow/pledge-skills/biome"><img src="https://agentmods.dev/badge/skills/pledgeandgrow/pledge-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.
<a href="https://agentmods.dev/skills/pledgeandgrow/pledge-skills/biome"><img src="https://agentmods.dev/badge/skills/pledgeandgrow/pledge-skills/biome.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00033 | $0.01447 |
| Opus 5.5 | $0.00013 | $0.00579 |
| Sonnet 5.5 | $0.00007 | $0.00289 |
| Haiku 4.5 | $0.00003 | $0.00145 |
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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Biome — Skill Overview
Source: biomejs.dev | Getting Started | Formatter | Linter | CLI | Configuration
What is Biome?
Biome is a fast, all-in-one toolchain for web projects — it formats, lints, and assists your code in a fraction of a second. It is designed to replace Prettier and ESLint with a single, opinionated tool written in Rust.
Key Benefits
- Fast: Written in Rust, formats and lints in milliseconds
- All-in-one: Formatter + linter + import organizer in one tool
- Opinionated: Few options, no bike-shedding — like Prettier's philosophy
- Multi-language: JavaScript, TypeScript, JSX, TSX, JSON, CSS, GraphQL, Grit, HTML (experimental)
- Zero config: Works out of the box with sensible defaults
- Editor integration: First-party extensions for VS Code, IntelliJ, Zed
- CI ready:
biome cicommand optimized for CI pipelines - Migration tools:
biome migrate eslintandbiome migrate prettiercommands - Plugin system: GritQL-based linter plugins for custom rules
File Index
| File | Coverage |
|---|---|
| getting-started.md | Installation, getting started, configure Biome, manual installation, big projects, VCS integration, investigate slowness, language support, versioning |
| formatter.md | Formatter usage, CLI, options, ignore code, differences with Prettier, option philosophy |
| linter.md | Linter usage, rules, safe/unsafe fixes, rule pillars, configure linter, suppressions, domains, plugins, rules sources, linter groups, FAQ |
| reference.md | CLI reference (all commands), configuration reference (all options), diagnostics, GritQL reference |
Quick Start
# Install
npm i -D -E @biomejs/biome
# or: pnpm add -D -E @biomejs/biome
# or: bun add -D -E @biomejs/biome
# or: deno add -D npm:@biomejs/biome
# or: yarn add -D -E @biomejs/biome
# Initialize configuration
npx @biomejs/biome init
# Format all files
npx @biomejs/biome format --write
# Lint and apply safe fixes
npx @biomejs/biome lint --write
# Format + lint + organize imports (all-in-one)
npx @biomejs/biome check --write
# CI mode (optimized for CI environments)
npx @biomejs/biome ci
What ships with it
4 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.
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.
- 1mo ago First seen · 137 lines · 33 tokens per session scan A 60b17d1dd125
Biome is a skill published in the GitHub repository pledgeandgrow/pledge-skills (10 stars, last pushed 3mo ago), licensed MIT. It adds 33 tokens to every session and 1,447 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-31.
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