bun-development

A development setup for building JavaScript and TypeScript software with Bun, a runtime that runs JavaScript outside a web browser.

In plain words
What is it for?
Use it when developing or maintaining applications written in JavaScript or TypeScript with Bun.
Why use it?
It provides a workflow focused on Bun-based development instead of assuming the project uses another JavaScript runtime.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/sacenox/mini-coder/bun-development
Any agent
npx skills add sacenox/mini-coder --skill bun-development
Clone the repo
git clone --depth 1 https://github.com/sacenox/mini-coder

Made for: Claude Code, Codex.

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,889 The whole file, excluding the scripts and references it only reads on demand.
Security scan E 3 findings. Scan, not verified.
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 $0.00035 $0.03889
Opus 5 $0.00017 $0.01945
Sonnet 5 $0.00007 $0.00778
Haiku 4.5 $0.00003 $0.00389

Measured 2d ago against content hash ca5333d326cb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade E, and why

bun-development scanned grade E with 3 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 2d 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.

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

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf node_modules package-lock.json

Makes network callslowCapability

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

<!-- security-allowlist: curl-pipe-bash, irm-pipe-iex -->
.agents/skills/bun-development/SKILL.md · 702 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. 2d ago First seen · 702 lines · 35 tokens per session scan E ca5333d326cb

Subscribe to this mod's changes

bun-development is a skill published in the GitHub repository sacenox/mini-coder (37 stars, last pushed 1mo ago), with no licence file. It adds 35 tokens to every session and 3,889 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it E with 3 findings (downloads and executes remote code, recursive force delete, 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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