checksum

// A CLI utility for generating and verifying cryptographic file checksums (MD5, SHA1, SHA256). Supports recursive directory hashing and verification from file.

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forks:367

updated:March 4, 2026

SKILL.mdreadonly

SKILL.md Frontmatter

namechecksum

descriptionA CLI utility for generating and verifying cryptographic file checksums (MD5, SHA1, SHA256). Supports recursive directory hashing and verification from file.

Checksum Utility

A dedicated CLI tool for ensuring file integrity. Use this skill to verify downloads, check for changes in files, or generate checksums for release artifacts.

Features

Multi-Algorithm: Supports md5 (default), sha1, sha256, sha512.
Recursive Hashing: Generates checksums for entire directories.
Verification: (Planned) Validate files against a checksum list.
JSON Output: Machine-readable output for integration scripts.

Usage

Calculate File Checksum

node skills/checksum/index.js --file <path> [--algo <md5|sha1|sha256>]

Example:

node skills/checksum/index.js --file package.json --algo sha256
# Output: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855  package.json

Recursive Directory Checksum

node skills/checksum/index.js --dir <path> [--algo <md5|sha1|sha256>] [--json]