bjornmelin/dev-skills · plugins/claude-core/skills/claude-subagent-creator/SKILL.md

claude-subagent-creator skillA

claude-subagent-creator is agent-read markdown (skill) from bjornmelin/dev-skills: Author, validate, and install custom Claude Code subagents as .claude/agents Markdown files. Use when the user asks to create a subagent, custom agent, or .claude/agents role; define a reusable reviewer, explorer, planner, or worker persona; set an agent's model or tool allowlist; or turn a recurring workflow into a delegatable role. Produces Markdown agent files with YAML frontmatter (name, description, model, tools) plus a focused system-prompt body, scoped to the smallest tool surface that do.

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 bjornmelin/dev-skills/claude-subagent-creator@git:20260625.dee2db9
Exact content
mdr add bjornmelin/dev-skills/claude-subagent-creator@sha256:e641948cfdd2e4aa

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_kl5msxpklvf76ywb.svg)](https://markdownregistry.com/a/art_kl5msxpklvf76ywb)

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Versions

versioncommittedcommitsizeaudit
git:20260625.dee2db9 latest2026-06-25 dee2db9 4,334 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 (4334 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

bjornmelin/dev-skills · 7 stars · license none · pushed 2026-09-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_kl5msxpklvf76ywb
GET https://markdownregistry.com/api/v1/resolve?ref=bjornmelin/dev-skills/claude-subagent-creator
GET https://markdownregistry.com/api/v1/blob/e641948cfdd2e4aaf7e40669cb4f5adf227d3f9ecd3bdde3065d0474c5620b21

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