mcp-builder SKILL.md skillA
mcp-builder from heretyc/subagent-mcp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add heretyc/subagent-mcp/mcp-builder@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- heretyc/subagent-mcp
- Path
skills/mcp-builder/SKILL.md- Versions recorded
- 4
- Latest version
- v1.0.0, committed Jul 13, 2026
- First version recorded
- May 30, 2026
- Size
- 6,380 bytes
- Repository stars
- 3
- License
- Apache-2.0
Build, package, install, configure, debug, and optimize Model Context Protocol (MCP) servers for Claude (Desktop, Code CLI) and Codex CLI on Windows and macOS. Use when building MCP tools, creating AI tool integrations, give Claude access to database or API or filesystem, connect AI agent to external tools or services, packaging stdio or HTTP servers, configuring mcpServers JSON or TOML, troubleshooting spawn ENOENT or connection errors, designing tool/resource/prompt schemas, implementing…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# MCP Builder Build and ship MCP servers for Claude and Codex. Load `references/retrieval-map.md` first to find the right leaf doc for any task. This is generic MCP-server-building guidance for arbitrary servers; it does not apply to subagent-mcp's own no-API-key architecture. ## Quick Decision Tree Some "Load" targets below are thin indexes with a same-named sub-directory (`config-claude.md`, `implementation-patterns.md`, `install-windows.md`, `packaging-node.md`, `packaging-python.md`, `tool-resource-prompt-schemas.md`, `troubleshooting.md`). For these, follow the index's table of contents into `references/<topic>/` for full detail : don't stop at the index. See `references/retrieval-map.md` for specifics. | Task | Load | |------|------| | Understand MCP protocol / primitives | `protocol-spec.md` | | Tool / resource / prompt schemas | `tool-resource-prompt-schemas.md` | | TypeScript/Node server + npm package | `packaging-node.md` | | Python server + pip/uvx package | `packaging-python.md` | | Claude Desktop or Claude Code config | `config-claude.md` | | Codex CLI config | `config-codex.md` | | Windows install / path / registry | `install-windows.md` | …
Read the whole file at its exact version.
How to install
mdr add heretyc/subagent-mcp/mcp-builder@sha256:fa293896d7a5330eThe line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_yrtfzjkkr53ro66o)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between May 30, 2026 and Jul 13, 2026, about one every 15 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-07-13 | 6023feb | 6,380 B | A | view · diff |
| git:20260710.beeacaa | 2026-07-10 | beeacaa | 6,212 B | A | view · diff |
| git:20260603.1e9d02f | 2026-06-03 | 1e9d02f | 6,214 B | A | view · diff |
| git:20260530.7e21326 | 2026-05-30 | 7e21326 | 5,794 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6380 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
heretyc/subagent-mcp · 3 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yrtfzjkkr53ro66o GET https://markdownregistry.com/api/v1/resolve?ref=heretyc/subagent-mcp/mcp-builder GET https://markdownregistry.com/api/v1/blob/fa293896d7a5330e114b4928fac029a242fe88b5d777c0d0b410bdbd43ea3e2e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from heretyc/subagent-mcp
Every file in heretyc/subagent-mcp