bun-macros SKILL.md skillA
bun-macros from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add secondsky/claude-skills/bun-macros@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- secondsky/claude-skills
- Path
plugins/bun/skills/bun-macros/SKILL.md- Versions recorded
- 3
- Latest version
- v1.0.0, committed Apr 2, 2026
- First version recorded
- Dec 29, 2025
- Size
- 7,480 bytes
- Repository stars
- 247
- License
- MIT
Evaluate JavaScript at bundle time and inline results. Use when optimizing compile-time code generation, embedding files, inlining environment variables, or executing code during the bundling process.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Bun Macros
Bun macros run JavaScript at bundle time and inline the results into the output.
## Quick Start
```typescript
// src/config.ts (macro file)
export function getVersion() {
return "1.0.0";
}
export function getBuildTime() {
return new Date().toISOString();
}
// src/index.ts (consumer)
import { getVersion, getBuildTime } from "./config" with { type: "macro" };
// At bundle time, these become:
const version = "1.0.0";
const buildTime = "2024-01-15T12:00:00.000Z";
```
## Macro Syntax
```typescript
// Import with macro attribute
import { fn } from "./macro-file" with { type: "macro" };
// Call the macro (evaluated at build time)
const result = fn();
```
## Common Use Cases
### Environment Inlining
```typescript
// macros/env.ts
export function env(key: string): string {
return process.env[key] ?? "";
}
// src/index.ts
import { env } from "./macros/env" with { type: "macro" };
const apiUrl = env("API_URL");
// Becomes: const apiUrl = "https://api.example.com";
```
### Git Information
```typescript
// macros/git.ts
export function gitCommit(): string {
return Bun.spawnSync(["git", "rev-parse", "HEAD"])
.stdout.toString().trim();
}
…Read the whole file at its exact version.
How to install
mdr add secondsky/claude-skills/bun-macros@sha256:9c4ee6d543e14223The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_6ucx66bsu2vemzmx)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Dec 29, 2025 and Apr 2, 2026, about one every 47 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-04-02 | 75421fa | 7,480 B | A | view · diff |
| v1.0.0 | 2026-04-02 | 89c5e89 | 7,467 B | A | view · diff |
| v1.0.0 | 2025-12-29 | 2cbc8ed | 7,453 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7480 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6ucx66bsu2vemzmx GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/bun-macros GET https://markdownregistry.com/api/v1/blob/9c4ee6d543e1422306d04132f8c06e78a0cb5474d8ee8df1a22ca153330f2638
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.