MCPInstall

bun-file-io

by anomalycoBackend & APIs

Use this when you are working on file operations like reading, writing, scanning, or deleting files. It summarizes the preferred file APIs and patterns used in this repo. It also notes when to use filesystem helpers for directories.

Installs
105
Last 24h
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Security
Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/anomalyco/opencode --skill bun-file-io
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads bun-file-io automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Use this when

  • Editing file I/O or scans in packages/opencode
  • Handling directory operations or external tools

Bun file APIs (from Bun docs)

  • Bun.file(path) is lazy; call text, json, stream, arrayBuffer, bytes, exists to read.
  • Metadata: file.size, file.type, file.name.
  • Bun.write(dest, input) writes strings, buffers, Blobs, Responses, or files.
  • Bun.file(...).delete() deletes a file.
  • file.writer() returns a FileSink for incremental writes.
  • Bun.Glob + Array.fromAsync(glob.scan({ cwd, absolute, onlyFiles, dot })) for scans.
  • Use Bun.which to find a binary, then Bun.spawn to run it.
  • Bun.readableStreamToText/Bytes/JSON for stream output.

When to use node:fs

  • Use node:fs/promises for directories (mkdir, readdir, recursive operations).

Repo patterns

  • Prefer Bun APIs over Node fs for file access.
  • Check Bun.file(...).exists() before reading.
  • For binary/large files use arrayBuffer() and MIME checks via file.type.
  • Use Bun.Glob + Array.fromAsync for scans.
  • Decode tool stderr with Bun.readableStreamToText.
  • For large writes, use Bun.write(Bun.file(path), text).

NOTE: Bun.file(...).exists() will return false if the value is a directory. Use Filesystem.exists(...) instead if path can be file or directory

Quick checklist

  • Use Bun APIs first.
  • Use path.join/path.resolve for paths.
  • Prefer promise .catch(...) over try/catch when possible.

FAQ

What does the bun-file-io skill do?

Use this when you are working on file operations like reading, writing, scanning, or deleting files. It summarizes the preferred file APIs and patterns used in this repo. It also notes when to use filesystem helpers for directories.

How do I install bun-file-io?

Run npx skills add https://github.com/anomalyco/opencode --skill bun-file-io in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/bun-file-io/ (personal) or .claude/skills/bun-file-io/ (project).

Which AI agents can use bun-file-io?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is bun-file-io safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains bun-file-io?

It is published by anomalyco in anomalyco/opencode. It has 105 recorded installs.

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