How do I install the Checksum skill?

Run npx skillmds@latest add modbender/checksum in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Checksum skill do?

A CLI utility for generating and verifying cryptographic file checksums (MD5, SHA1, SHA256). Supports recursive directory hashing and verification from file. It is listed under Coding & Dev Tools on SkillMD.

Is Checksum safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: executes scripts. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Checksum?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Checksum free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Checksum?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Checksum by modbender — Agent Skill

Name: Checksum
Rating: 4.666666666666667 (3 reviews)
Author: modbender

File contents

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]