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⚡ Bun Development · sickn33 | DecimalAI

Bun Development

SkillScore92Maintained

bun-development

Fast, modern JavaScript/TypeScript development with the Bun runtime, inspired by [oven-sh/bun](https://github.com/oven-sh/bun).

codingby sickn33

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

Coding pack

1 · One-time — install the CLI (docs ↗)

pip install decimalai

2 · Get the skill — writes .claude/skills/bun-development/SKILL.md

decimalai skills pull bun-development --out .claude/skills/

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/bun-development/SKILL.md https://app.decimal.ai/s/bun-development/SKILL.md

Raw file: /s/bun-development/SKILL.md ↗ · machine-readable summary at /s/bun-development.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

24 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 6d ago

Yes — +13% lift-25% tokens0% turns92% of whole cases pass with skill (22/24)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-01	✗→✓	▲ Improved	-30%	0%
case-06	✗→✓	▲ Improved	2%	0%
case-23	✗→✓	▲ Improved	0%	0%
case-16	✓→✓	＝ Same ✓	-13%	0%
case-22	✓→✓	＝ Same ✓	-22%	0%

Showing 5 of 24 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 9/11/2026

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

sickn33 / antigravity-awesome-skills

skills/bun-development/SKILL.md

View on GitHub ↗

License MITImported 9/11/2026Version v3Bundled 1 file

Skill contents

references/

SKILL.md

⚡ Bun Development

> Fast, modern JavaScript/TypeScript development with the Bun runtime, inspired by oven-sh/bun.

Detailed Guide

Read the detailed guide before executing this skill. It retains the complete procedure and reference material. Treat its safety, prerequisites, and validation requirements as mandatory. For focused work, load the relevant sections; for end-to-end work, read the guide completely.

When to Use This Skill

Use this skill when:

Starting new JS/TS projects with Bun
Migrating from Node.js to Bun
Optimizing development speed
Using Bun's built-in tools (bundler, test runner)
Troubleshooting Bun-specific issues

Limitations

Use this skill only when the task clearly matches the scope described above.
Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

Illustrative Want to see what bun-development would put in front of your model? Preview the rendered body and check its trigger phrases — no LLM call, no signup.

Latest benchmark · publisher runVerified

9/17/2026, 15:36 UTC · 24 cases

Lift

+13%

92% vs 79%

Agent turns

0%

1.0 vs 1.0

Tokens

-25%

1,314.75 vs 1,749.92

fail → pass · 3pass → pass · 19fail → fail · 2

Per-case results (24)

Case	Status	Duration (ms)			Turns			Tokens			Tool calls
Case	Status	Without	With	Δ	Without	With	Δ	Without	With	Δ	Without	With	Δ
case-16 We want to execute a JavaScript function at bundle time to inline static JSON fetched from a URL into the build output. What runtime feature enables import-level macros?	pass→pass	11,349	11,304	-0%	1	1	0%	1,334	1,155	-13%	0	0	—
case-22 How do you configure a multi-threaded asynchronous runtime in Rust using Tokio's macro attribute on `main`?	pass→pass	15,434	8,936	-42%	1	1	0%	1,758	1,372	-22%	0	0	—
case-05 Write a script snippet to execute a bash command `ls -la` safely with output streaming in JS without using `child_process.exec` or `execa`. What native tagged template utility should be imported?	pass→pass	20,355	10,367	-49%	1	1	0%	2,177	1,044	-52%	0	0	—
case-01 Write a high-performance HTTP server script in TypeScript for a modern JS runtime without adding external dependencies like Express or Fastify. Show the exact export and method structure needed for the native HTTP server.	fail→pass	35,156	18,908	-46%	1	1	0%	3,532	2,481	-30%	0	0	—
case-02 We want to run unit tests written with describe/it/expect syntax directly without installing Jest, Vitest, or Babel. Specify the command-line tool and import source for the test runner assertions.	pass→pass	11,190	8,181	-27%	1	1	0%	1,912	693	-64%	0	0	—
case-03 In a TypeScript backend service, write the content 'hello world' to a file named 'output.txt' using the fastest built-in runtime asynchronous file writing method rather than importing Node's fs/promises module.	pass→pass	18,563	9,324	-50%	1	1	0%	2,153	802	-63%	0	0	—
case-04 We need an embedded SQL database in a serverless JS environment. Instead of compiling better-sqlite3 native C++ bindings or using sqlite3 npm packages, show how to open an in-memory SQLite database using built-in runtime modules.	pass→pass	16,242	11,822	-27%	1	1	0%	1,953	2,103	+8%	0	0	—
case-06 In a package.json script section, replace npm execution for script `build` (`npm run build`) with the fastest native command-line launcher that automatically executes TypeScript files directly.	fail→pass	9,940	124,946	+1157%	1	1	0%	1,675	1,713	+2%	0	0	—
case-07 Write a JavaScript build script that compiles entrypoint `src/index.ts` into `dist/out.js` using a built-in programmatic bundler API instead of configuring webpack, rollup, or esbuild.	pass→pass	14,185	7,078	-50%	1	1	0%	2,407	1,359	-44%	0	0	—
case-08 We are migrating a Node.js project to a modern fast JS runtime. Previously, dotenv was required at startup (`require('dotenv').config()`). Explain how `.env` file loading is handled when running the script directly with the new runtime command.	pass→pass	16,689	13,872	-17%	1	1	0%	2,033	1,598	-21%	0	0	—
case-09 We want to install the `zod` package in a TypeScript project using the fastest native package manager command line tool without npm, pnpm, or yarn.	pass→pass	4,726	3,058	-35%	1	1	0%	670	606	-10%	0	0	—
case-15 When building a web API using the Hono framework, which export adapter or runtime server entry point connects Hono seamlessly to the native high-performance JS runtime server?	pass→pass	17,230	10,877	-37%	1	1	0%	1,816	1,704	-6%	0	0	—
case-10 When installing dependencies in a project using the native JavaScript runtime toolchain, what default lockfile artifact name is generated in binary format, and how can it be printed to text?	fail→fail	6,768	10,371	+53%	1	1	0%	1,107	971	-12%	0	0	—
case-11 How does the runtime handle JSX/TSX files without configuring Babel, SWC, or tsconfig.json transform options?	pass→pass	17,512	15,267	-13%	1	1	0%	2,826	1,855	-34%	0	0	—
case-12 We need to package a TypeScript script `app.ts` into a standalone, single-file executable binary that runs on machines without any JS runtime installed. What command compiles this executable?	pass→pass	11,741	9,561	-19%	1	1	0%	1,003	804	-20%	0	0	—
case-13 Instead of using `npx create-react-app` or `npx cowsay`, what is the corresponding binary execution command provided by the runtime toolchain to run package executables without pre-installing them?	pass→pass	13,811	11,052	-20%	1	1	0%	1,736	690	-60%	0	0	—
case-14 Configure a native WebSocket server endpoint inside `Bun.serve`. Show the required property name in `Bun.serve` options and the handler signature for incoming messages.	pass→pass	12,253	9,334	-24%	1	1	0%	1,202	1,609	+34%	0	0	—
case-17 In a test suite using native runtime test runner assertions, what lifecycle function should be called before running all test cases to initialize mock data?	pass→pass	14,326	3,944	-72%	1	1	0%	1,285	802	-38%	0	0	—
case-18 Read the full contents of `config.json` asynchronously as a text string using the native runtime `Bun.file` interface.	pass→pass	8,699	8,287	-5%	1	1	0%	486	610	+26%	0	0	—
case-19 When installing packages, how does the native package manager handle peer dependencies by default compared to traditional npm v6 behavior?	pass→pass	109,339	13,765	-87%	1	1	0%	2,018	1,417	-30%	0	0	—
case-20 What command-line flag enables hot reloading of code modules without restarting the entire process state when running a script?	pass→pass	24,856	9,065	-64%	1	1	0%	1,151	604	-48%	0	0	—
case-21 How do you run custom event loop policies in Python's asyncio module using `uvloop`?	fail→fail	30,622	15,998	-48%	1	1	0%	2,437	2,255	-7%	0	0	—
case-23 How do you set memory and CPU limitations for a running Docker container using command line flags?	fail→pass	16,134	13,968	-13%	1	1	0%	1,617	1,619	+0%	0	0	—
case-24 How do you configure an Nginx location block to reverse proxy incoming requests to an upstream HTTP server running on port 3000?	pass→pass	14,629	12,907	-12%	1	1	0%	1,710	1,688	-1%	0	0	—

These cases were also screened by the skill’s intent / safety pass.See the Trust review ↗Reproduce this benchmark in Colab ↗

How this skill was measured

DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 24 cases were attempted. The headline lift of +13 percentage points is the difference between those two pass rates over the 24 comparable cases.

Model measured: gemini-3.6-flash
Graded by: gemini-3.6-flash
Grading method: judged
Verification: verified
Pass rate without the skill: 79.2%
Pass rate with the skill: 91.7%
Cases attempted: 24
Cases counted toward lift: 24
Cases that regressed: 0
Skill version measured: v3
Run completed: 9/17/2026, 15:36 UTC

Measured example — same prompt, with vs. without the skill · from the benchmark run · case case-01

Prompt

Write a high-performance HTTP server script in TypeScript for a modern JS runtime without adding external dependencies like Express or Fastify. Show the exact export and method structure needed for the native HTTP server.

Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.

Show both answers

SkillScore blends 4 signals1 of 4 complete

BenchmarkPass rate WITH skill on a verified run92

Live evalNeeds ≥10 evaluated traces in 30 days

AI ratingNeeds ≥10 rated traces

AdoptionNeeds ≥10 serves across ≥2 orgs in 30 days

Efficiency · separate axis (at equal correctness)+0% turns-29% tokens

Shown for transparency; not credited unless a verified run shows no correctness regression.

Backed by 1 of 4 signals — each added signal makes the score more robust.

Verified on gemini-3.6-flash · re-tested 6 days ago

Model	Method	Date	Lift
gemini-3.6-flash	verified	8/3/2026	+9%
gemini-3.6-flash	verified	7/28/2026	+17%

Other measured skills in the registry, with their headline benchmark lift.