kevint-cerebras/bun-file-io
.opencode/skill/bun-file-io/SKILL.md
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.
$ install --global
skillsauthnpx skillsauth add kevint-cerebras/cerebras-code-cli bun-file-ioInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 6, 2026, 11:00 AM4.5s1 file scanned
SKILL.md
- name:
- bun-file-io
- description:
- 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.
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; calltext,json,stream,arrayBuffer,bytes,existsto 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.whichto find a binary, thenBun.spawnto run it. Bun.readableStreamToText/Bytes/JSONfor stream output.
When to use node:fs
- Use
node:fs/promisesfor directories (mkdir,readdir, recursive operations).
Repo patterns
- Prefer Bun APIs over Node
fsfor file access. - Check
Bun.file(...).exists()before reading. - For binary/large files use
arrayBuffer()and MIME checks viafile.type. - Use
Bun.Glob+Array.fromAsyncfor 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.resolvefor paths. - Prefer promise
.catch(...)overtry/catchwhen possible.
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