/calculate-hash

Calculate the cryptographic hash of a given text. Supports SHA-1, SHA-256, SHA-384, and SHA-512.

BOOST

jegly@jegly

GitHub

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box

91814 skills

Install

$ npx -y skills add jegly/Box --skill calculate-hash --agent claude-code

How it fires

How this skill gets triggered: by you, by Claude, or both.

Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/calculate-hash

Context preview

The summary Claude sees to decide when to auto-load this skill.

Calculate the cryptographic hash of a given text. Supports SHA-1, SHA-256, SHA-384, and SHA-512.

SKILL.md

calculate-hash.SKILL.md

name: calculate-hash
description: Calculate the cryptographic hash of a given text. Supports SHA-1, SHA-256, SHA-384, and SHA-512.

Calculate Hash

This skill calculates the cryptographic hash of any text, fully offline using the built-in WebCrypto API.

Supported Algorithms

**SHA-256** (default — recommended)
**SHA-512**
**SHA-384**
**SHA-1** (legacy, avoid for security-sensitive use)

Instructions

Call the `run_js` tool with:

**script name**: `index.html`
**data**: A JSON string with:
`text`: String — the text to hash
`algorithm`: String (optional) — one of `SHA-256`, `SHA-512`, `SHA-384`, `SHA-1`. Defaults to `SHA-256` if not specified.

Examples

"What is the SHA-256 hash of 'hello world'?"
"Calculate the SHA-512 of this string: ..."
"Hash 'password123' with SHA-1"
"What is the hash of 'gemma'?" → use SHA-256 by default

Read it on GitHub ↗

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