bun

bun is a skill for Claude Code, Codex from hoodini/ai-agents-skills. It costs 56 tokens per session (3,003 once invoked), scanned D, original, no licence file.

A skill for building applications with Bun, a JavaScript runtime that can run and bundle code as an alternative to Node.js.

In plain words
What is it for?
Use it to create Bun projects, use Bun APIs, bundle applications, run tests with Bun test, or optimize Node.js alternatives.
Why use it?
It gives coding help tailored to Bun projects and its tools instead of assuming a Node.js setup.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to create Bun projects, use Bun APIs, bundle applications, run tests with Bun test, or optimize Node.js alternatives.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hoodini/ai-agents-skills/bun
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 hoodini/ai-agents-skills --skill bun
Clone the repo
git clone --depth 1 https://github.com/hoodini/ai-agents-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 bun

README.md
[![agentmods](https://agentmods.dev/badge/skills/hoodini/ai-agents-skills/bun/github.svg)](https://agentmods.dev/skills/hoodini/ai-agents-skills/bun)
Your own site
<a href="https://agentmods.dev/skills/hoodini/ai-agents-skills/bun"><img src="https://agentmods.dev/badge/skills/hoodini/ai-agents-skills/bun/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 bun

Your own site · 80×15
<a href="https://agentmods.dev/skills/hoodini/ai-agents-skills/bun"><img src="https://agentmods.dev/badge/skills/hoodini/ai-agents-skills/bun.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,003 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 4 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00056 $0.03003
Opus 5 $0.00028 $0.01502
Sonnet 5 $0.00011 $0.00601
Haiku 4.5 $0.00006 $0.00300

Measured 11d ago against content hash 7c5deb273e49, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade D, and why

bun scanned grade D with 4 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 11d 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

const response = await fetch('https://api.example.com/data', { method: 'POST',

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://bun.sh/install | bash

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://bun.sh/install | bash

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

const result = Bun.spawnSync(['echo', 'hello']);
skills/bun/SKILL.md · 535 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 11d ago First seen · 535 lines · 56 tokens per session scan D 7c5deb273e49

Subscribe to this mod's changes

bun is a skill published in the GitHub repository hoodini/ai-agents-skills (278 stars, last pushed 2mo ago), with no licence file. It adds 56 tokens to every session and 3,003 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it D with 4 findings (sends data to an external url, downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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