bun-file-io SKILL.md skillA
bun-file-io 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-file-io@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-file-io/SKILL.md- Versions recorded
- 4
- Latest version
- v1.0.0, committed Apr 26, 2026
- First version recorded
- Dec 29, 2025
- Size
- 7,731 bytes
- Repository stars
- 247
- License
- MIT
Use for Bun file I/O: Bun.file, Bun.write, streams, directories, glob patterns, metadata.
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 File I/O
Bun provides fast, optimized file operations via `Bun.file()` and `Bun.write()`.
## Reading Files
### Bun.file()
```typescript
// Create file reference (lazy, doesn't read yet)
const file = Bun.file("./data.txt");
// File properties
console.log(file.size); // Size in bytes
console.log(file.type); // MIME type
console.log(file.name); // File path
console.log(await file.exists()); // Boolean
// Read content
const text = await file.text();
const json = await file.json();
const buffer = await file.arrayBuffer();
const bytes = await file.bytes(); // Uint8Array
const stream = file.stream(); // ReadableStream
```
### Read Specific Types
```typescript
// JSON file
const config = await Bun.file("config.json").json();
// Text file
const content = await Bun.file("readme.md").text();
// Binary file
const binary = await Bun.file("image.png").arrayBuffer();
// With import attributes
import data from "./data.json" with { type: "json" };
import text from "./content.txt" with { type: "text" };
```
## Writing Files
### Bun.write()
```typescript
// Write string
await Bun.write("./output.txt", "Hello World");
// Write JSON
…Read the whole file at its exact version.
How to install
mdr add secondsky/claude-skills/bun-file-io@sha256:db95b2031da391a0The 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_rgk7oy53sc3t5wof)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Dec 29, 2025 and Apr 26, 2026, about one every 40 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-04-26 | 852a9f7 | 7,731 B | A | view · diff |
| v1.0.0 | 2026-04-02 | 75421fa | 7,729 B | A | view · diff |
| v1.0.0 | 2026-04-02 | 89c5e89 | 7,716 B | A | view · diff |
| v1.0.0 | 2025-12-29 | 2cbc8ed | 7,703 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 (7731 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_rgk7oy53sc3t5wof GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/bun-file-io GET https://markdownregistry.com/api/v1/blob/db95b2031da391a0636ddb763212f50761146c23b26d44098233f5336b345225
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.