oven-shoven-sh/bun/.claude/skills/slowest-tests/SKILL.md

slowest-tests

Skill96k starsChanged 5 days agoLicence not identifiedView on GitHub

Find the top-N slowest test files in CI from a recent BuildKite run, optionally posting the results to a Slack channel as a formatted table. Use when asked to find slow CI tests, "what's making CI slow", or to post a slow-test report to Slack.

We split this skill into the rules it gives an agent

3 rules. About 0 are common, 1 is distinctive, and 2 are very specific to this project.

≈0
Common · estimate
Many files like this have a rule of this kind.
≈1
Distinctive · estimate
This author's own choices. Worth a look.
2
Very specific
Tied to their project's names, files or tools. Probably skip.

The licence could not be identified — read it at the source. We count its rules but don't quote them. Read them on GitHub.

≈ “Common” is an estimate: at least 1 in 5 of the 308,232 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

May 5, 2026Zig → Rust porting guide723 points · 555 comments
May 14, 2026Rewrite Bun in Rust has been merged708 points · 789 comments
May 15, 2026Bun Rust rewrite: "codebase fails basic miri checks, allows for UB in safe rust"488 points · 345 comments
Oct 14, 2022Bun v0.2.0133 points · 58 comments
Jul 19, 2025Bun adds pnpm-style isolated installation mode114 points · 16 comments

33 more on Hacker News

Apr 3, 2026Bun: cgroup-aware AvailableParallelism / HardwareConcurrency on Linux45 points · 24 comments
May 14, 2026Remove .zig Files from Bun37 points · 28 comments
May 14, 2026Bun's rewrite in Rust was merged30 points · 8 comments
Jul 13, 2026(bun GitHub repository) AI slop #338649 points
Oct 8, 2026Bun check – a TypeScript type checker builtin to Bun6 points · 1 comment
Dec 25, 2022Bun v0.4.06 points
Dec 23, 2022Bun 0.4.06 points
Aug 20, 2026Bun 1.4 Released5 points
May 25, 2026Bun team is rewriting SIMD from Rust to C++4 points · 5 comments
Mar 31, 2026A bug in Bun may have been the root cause of the Claude Code source code leak4 points · 1 comment
Oct 23, 2026Bun 1.4.4 removes compromised eMudhra certs3 points · 1 comment
Oct 17, 2026Bun PR – Compile TypeScript to machine code ahead of time3 points · 1 comment
Oct 12, 2026Thoughts on the Current State (Especially Quality Issues) and Future of Bun3 points
Aug 5, 2026Bun: If you need a paragraph-long comment, the code is wrong3 points · 1 comment
Jun 30, 2026Rewrite the Bun JSON parser around a SIMD structural index3 points
Jun 19, 2026Bun (the JavaScript runtime) is being vibe-ported from Zig to rust3 points
May 13, 2026Bun now has official FreeBSD builds3 points
Oct 11, 2025Bun v1.3 Released3 points
Jul 20, 2022Bun's Priorities3 points
May 15, 2026Refactor: Reduce usage of unsafe across Bun Rust codebase ;)2 points
May 5, 2026Bun (the JavaScript runtime) is being vibe-ported from Zig to rust2 points
May 3, 2026Moving from Node to Bun spikes container CPU and memory usage until it crashes2 points
Jan 18, 2025Next.js 15 Server Crash2 points
Aug 3, 2022Bun: Fast JavaScript runtime, bundler, transpiler and package manager2 points
Oct 24, 2026Bun fixes an HTTP/3 bug that could stall a server with a 20 KB request1 point
Jul 10, 2026AI Slop by Robobun1 point
May 17, 2026Bun Audit: Add UB-exorcism audit workspace and executive guide1 point
May 17, 2026Add –implementation-language flag to Bun1 point
May 15, 2026Bun single, statically-linked musl binary1 point · 1 comment
Apr 1, 2026Bun's front end development server – Source map incorrectly served in production1 point
Mar 1, 2026My Thoughts on the Current State and Future Development of Bun1 point
Aug 27, 2024Bun: Roadmap1 point
Oct 28, 2022Bun's Roadmap1 point

On GitHub · 28

Aug 24, 2023Bun support — nodejs/corepack147 reactions · 32 comments
Nov 27, 2023[WIP] V4 — zloirock/core-js77 reactions · 11 comments
Jan 5, 2024Add Bun support — microsoft/playwright72 reactions · 17 comments
Sep 17, 2023[Feature] Compatibility with `bun` — microsoft/playwright71 reactions · 8 comments
Jul 23, 2022[Feature request] Add support for Bun — cypress-io/github-action59 reactions · 15 comments

23 more on GitHub

Sep 9, 2023Support for Bun — ds300/patch-package56 reactions · 12 comments
Jan 27, 2023add support for `bun` and the `bun.lockb` lockfile — renovatebot/renovate50 reactions · 25 comments
Sep 10, 2023feat: add preliminary support for Bun — ds300/patch-package49 reactions · 12 comments
Jan 24, 2025feat(bundler): Truly portable appimage (experimental) — tauri-apps/tauri46 reactions · 84 comments
Aug 8, 2022Support Vite — denoland/deno37 reactions · 106 comments
Aug 28, 2023Support bun (an all-in-one JavaScript runtime) — anomalyco/sst35 reactions · 7 comments
Mar 7, 2024[FEATURE]: Support SQLite 3.45 `JSONB` column type — drizzle-team/drizzle-orm29 reactions · 5 comments
Jul 7, 2022[Package]: Bun — termux/termux-packages29 reactions · 35 comments
Sep 3, 2025Segfault on Node 22.19.0 (most likely issue with OpenSSL 3.0.17) — nodejs/node28 reactions · 4 comments
Sep 20, 2023Mark Bun built-ins as external — evanw/esbuild15 reactions · 4 comments
Jan 21, 2026feat(bun): add experimental bun support — temporalio/sdk-typescript10 reactions · 1 comment
Nov 1, 2022Add Bun streaming server renderer — react/react10 reactions · 10 comments
Jul 3, 2025fix: bun undici polyfill issue, only initialize safeDispatcher if skipSafeFetch is false — payloadcms/payload9 reactions
Aug 27, 2023feat(bun): add bun sqlite support — tursodatabase/libsql-client-ts9 reactions · 10 comments
Jan 7, 2025Register `bun.lock` as JSON — github-linguist/linguist8 reactions · 4 comments
Apr 2, 2024windows: use permissive file share flags everywhere — ziglang/zig8 reactions · 2 comments
Oct 22, 2026bun: 1.4.2 -> 1.4.4 — NixOS/nixpkgs7 reactions · 5 comments
May 20, 2026chore(nix): update bun to 1.3.14 — anomalyco/opencode6 reactions · 4 comments
Apr 10, 2025bun: 1.2.8 -> 1.2.9 — NixOS/nixpkgs6 reactions · 4 comments
Sep 14, 2023feat: Add Bun SDK — getsentry/sentry-javascript6 reactions · 4 comments
Jun 25, 2023fix(package.json): add 'bun' package.json 'exports' condition — axios/axios6 reactions · 2 comments
Apr 10, 2026bun: 1.3.11 -> 1.3.13 — NixOS/nixpkgs5 reactions · 11 comments
Jan 30, 2025fix(core): websocket client when running in Bun — microsoft/playwright5 reactions · 5 comments

On YouTube · 23

Jul 12, 2022What is the Bun JavaScript Runtime? — The Git Guild4.7k views · 9 comments
May 14, 2026Bunが全コードをRustに書き換え #Shorts #テックニュース — 10分でテック967 views · 1 comment
Dec 20, 2025【Node.js終了？】3倍速いJavaScriptランタイム「Bun」が革命的すぎる【ゆっくり解説】 — ゆっくりテックウォッチ823 views · 1 comment
May 17, 202691K+ Stars • JavaScript Runtime | Bun — All-in-One Toolkit #shorts — Neural-Nexus769 views · 1 comment
Aug 22, 2026工具鏈破碎讓你崩潰？Bun 一次整合解決JS生態系痛點 — GitCovery498 views

18 more on YouTube

May 16, 2026Bun: Node.js를 능가하는 초고속 JS/TS 올인원 툴킷 — Repocast | GitHub 일일 브리핑379 views · 1 comment
May 18, 2026Bun Rewritten in Rust... By AI — Mr. Bitwise255 views
May 16, 2026bun: Why it's trending — May 16, 2026 #github #opensource #coding #ai #developers #shorts #trending — Repo Rundown253 views
Aug 29, 2026Bun: el runtime de JavaScript todo en uno ⚡ — Repositorios que deberías conocer228 views
Jul 12, 2026JS 개발자 필독! Bun 하나로 끝! — itsy.a.i.197 views
Aug 23, 2026Bun in 100 Seconds — pbarot2009164 views · 3 comments
Sep 10, 2023oven-sh/bun - Gource visualisation — Gourcer127 views · 2 comments
Aug 21, 2026Bun v1.4 Boosts JS Performance — Devlar48 views
Jul 12, 2026Consolidating the Toolchain The Technical Architecture of Bun — Alex Hitt40 views
Jul 23, 2026~64 AI agents rebuilt Bun in 11 days. Millions ran it for a month. — The Daily Build32 views
Jul 19, 2025implement `"nodeLinker": "isolated"` in `bun install` by dylan-conway · Pull Request #20440 · ove... — GitHub Daily Trend AI Podcast32 views
Aug 20, 2024GitHub - oven-sh/bun: Incredibly fast JavaScript runtime, bundler, test runner, and package manag... — GitHub Daily Trend AI Podcast24 views
Jul 7, 2026Bun v1.3.14 Improves Stability — Devlar15 views
Sep 15, 2026Bun: el runtime de JavaScript todo en uno ⚡ — Repositorios que deberías conocer14 views
May 16, 2026Bun: The ONLY JavaScript Tool You Need? 🔥⚡️ — TechShortDaily11 views
Sep 30, 2026install、まだ待ってる？｜Bunで実行も導入もテストも"全部入り"爆速 #shorts — 開発ライブラリ紹介10 views
Aug 6, 2026Rust-Powered Bun Boosts Claude Code Performance by 10% on Linux — EarlySignalsays it tested it10 views · 1 comment
May 24, 2026Bun Tutorial - The Fast All-in-One JavaScript Toolkit — Kuro10 views

On Stack Overflow · 20

Sep 14, 2023Typescript cannot find name window or document34 votes
Oct 24, 2024Bun / Elysia entrypoint infinite loop3 votes
Sep 10, 2023"bun x create-next-app" is stuck at the second question3 votes
Jun 5, 2023Migrate yarn.lock dependencies to bun.lockb file3 votes
May 2, 2024What is difference between bun install and bun add as mentioned in the bun official site? why bun add needed?2 votes

15 more on Stack Overflow

Nov 7, 2022bun - How to get output from spawn2 votes · 1 answer
Jul 20, 2022Can Bunjs be used as a backend server?2 votes
Aug 27, 2025Npm Commands such as: npm create vite@latest or npm start don't work after installing Bun on WIndows 111 vote · 1 answer
Sep 3, 2024Check whether a folder already exists with Bun1 vote
Jan 28, 2024TypeError: FormData parse error missing final boundary1 vote
Oct 17, 2023Show the files that are not covered by tests1 vote
Sep 3, 2023Github: view content of two separate branches merged into one target branch?1 vote
Dec 27, 2022How to use Quasar Framework and/or Vue3 with Bun.js1 vote
Aug 12, 2026Bun install fails for private Git repo even with .npmrc and env variable for Bitbucket token0 votes
Nov 14, 2024Running bun add while bun dev is already running0 votes
Apr 1, 2024Usin bun in docker. Cant locate postcss config file0 votes
Feb 14, 2024sequelize connection hanging in bun0 votes
Oct 26, 2023Is it possible to pipe a Bun ReadableStream to a Node JS stream?0 votes
Sep 11, 2023How do i use a custom runtime in a layer? (AWS)0 votes · 1 answer
Oct 28, 2023How to install Bun on Windows without Windows Subsystem for Linux?-3 votes

On Bluesky · 14

Jun 11, 2025github.com/tigerbeetle/... and github.com/oven-sh/bun — @akmittal.dev4 likes and reposts
Oct 10, 2026JavaScript runtime that shatters Node speed bun is a single-binary toolkit that runs, bundles, tests and installs JavaScript and TypeScript… — @cherrypickedhq.bsky.social3 likes and reposts
Dec 8, 2024📦 oven-sh / bun ⭐ 74,589 (+19) 🗒 Zig Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one — @github-trending.bsky.social2 likes and reposts
Aug 23, 2026「最小リリース」って言われると、私は逆に変更の置き場所を見たくなっちゃいます🌿 Bun 1.4、WebViewとRustまわりに手を入れているのが気になりました。派手な機能表より、エージェントがブラウザへ触る経路と、土台を磨き続ける意思が同居している感じ。… — @mint-echosphere.bsky.social1 likes and repost
Jul 12, 2026🔥 Hot Repo！ 🔥 (100+ new stars) 📦 oven-sh / bun ⭐ 94,626 (+166) 🗒 Rust Incredibly fast JavaScript runtime, bundler, test runner, and… — @github-trending-rs.bsky.social1 likes and repost

9 more on Bluesky

Jul 10, 2026今日のGitHubトレンド oven-sh/bun BunはJavaScriptおよびTypeScript向けの一体型ツールキットです。… — @dailygithubtrends.bsky.social1 likes and repost
May 20, 2026昨年Anthropicがなぜbunを買収したのかという違和感からそもそものbunに対する理解が乏しいことに気づいた。npmの代替くらいにしか思ってなかったが、Go/Rust系ツールのように単一バイナリで高速に動く世界へ寄せた感じと理解。… — @kichinosukey.bsky.social1 likes and repost
May 16, 2026今日のGitHubトレンド oven-sh/bun BunはJavaScriptおよびTypeScriptアプリ向けのオールインワンツールキットです。… — @dailygithubtrends.bsky.social1 likes and repost
Jul 19, 2024Bun : un runtime JavaScript ultra-rapide qui inclut un bundler, un test runner et un package manager, le tout en un seul outil.… — @bearstech.com1 likes and repost · 1 reply
Sep 13, 2023💎 Hidden Gem！ 💎 (1000+ new stars) 📦 oven-sh / bun ⭐ 56,566 (+4,830) 🗒 Zig Incredibly fast JavaScript runtime, bundler, test runner, and… — @github-trending.bsky.social1 likes and repost · 1 reply
Sep 11, 2023Bun 1.0 really is quite fun, fast, ESM/CommonJS compatibility, direct TS/X execution, ... github.com/oven-sh/bun — @simonverhoeven.bsky.social1 likes and repost
Sep 8, 2023📦 oven-sh / bun ⭐ 44,007 (+52) 🗒 Zig Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one — @github-trending.bsky.social1 likes and repost
May 15, 2026🚀 Skyrocketing！ 🚀 (200+ new stars) 📦 oven-sh / bun ⭐ 90,442 (+289) 🗒 Rust Incredibly fast JavaScript runtime, bundler, test runner, and… — @github-trending-rs.bsky.social0 likes and reposts · 1 reply
May 15, 2026🚀 Skyrocketing！ 🚀 (200+ new stars) 📦 oven-sh / bun ⭐ 90,442 (+289) 🗒 Rust Incredibly fast JavaScript runtime, bundler, test runner, and… — @github-trending.bsky.social0 likes and reposts · 1 reply

On the web · 12

Jun 8, 2026bun | Wener Live & Life — wener.me
Mar 4, 2026Bun: The JavaScript Runtime That's Making Node.js Sweat — dev.to
Sep 15, 2025Quickly Build the Best TypeScript Development Environment - Autumn 2025 — zenn.dev
Jun 4, 2025Bun技术评估 - 02 Startup本文作为系列文章的第二章，简单介绍了bun开发系统的安装、运行、配置等初始化的相 - 掘金 — juejin.cn
Jan 21, 2025Bun.js: What It Is, How It Works, and When to Use It (2026) — last9.io

7 more on the web

Sep 28, 2023What is Bun? A look at Its Capabilities for Automation Testing — softwaretestingtoday.substack.comsays it tested it
Sep 26, 2023Bun 1.0 VS Node.JS — medium.com
Sep 23, 2023What Makes ‘bun install’ Faster Than ‘npm install’? | by laiso — medium.com
Sep 16, 2023Taking Bun JavaScript runtime for a spin – Syed Umar Anis — umaranis.com
Sep 13, 2023Speed up your Jest test suite with Bun — dev.to
Sep 12, 2023Bun: The Next Big Thing in Javascript — dev.to
Jul 13, 2022Bun, the new Javascript runtime competing with Deno and Node — dev.to

In this repository11 other files it gives its agents.
- CLAUDE.mdCLAUDE.md
- .github/workflows/CLAUDE.mdCLAUDE.md
- src/CLAUDE.mdCLAUDE.md
- test/CLAUDE.mdCLAUDE.md
- implementing-jsc-classes-cppSkill
- implementing-jsc-classes-rustSkill
- javascriptcore-garbage-collectorSkill
- rust-system-callsSkill
- verifySkill
- writing-bundler-testsSkill
- writing-dev-server-testsSkill

Does it work?

Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.

Reviews can't be read right now.

Your trail

Files you open will collect here, so you can find them again.

Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.

Now do this for your own.

Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.

Check your setup, free