charmbracelet/crush · .agents/skills/shell-builtins/SKILL.md

shell-builtins skillA

shell-builtins is agent-read markdown (skill) from charmbracelet/crush: Use when creating a new shell builtin command for Crush (internal/shell/), editing an existing one, or when the user needs to understand how commands are intercepted in Crush's embedded shell..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add charmbracelet/crush/shell-builtins@git:20260427.af002dc
Exact content
mdr add charmbracelet/crush/shell-builtins@sha256:cf06499c315c8fab

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_evmwqjszcuduk2gn.svg)](https://markdownregistry.com/a/art_evmwqjszcuduk2gn)

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Versions

versioncommittedcommitsizeaudit
git:20260427.af002dc latest2026-04-27 af002dc 3,163 BA view · diff
git:20260420.0a86d5f2026-04-20 0a86d5f 2,098 BA view · diff
git:20260416.3773b232026-04-16 3773b23 2,145 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (3163 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

charmbracelet/crush · 28,143 stars · license NOASSERTION · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_evmwqjszcuduk2gn
GET https://markdownregistry.com/api/v1/resolve?ref=charmbracelet/crush/shell-builtins
GET https://markdownregistry.com/api/v1/blob/cf06499c315c8fab0d1be7a9454ab044189e8e2ba4367f7009795f41f181bbee

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.