mcp-builder SKILL.md skillA
mcp-builder from event4u-app/agent-config is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add event4u-app/agent-config/mcp-builder@git:20261024.25cb8e3Pins git:20261024.25cb8e3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- event4u-app/agent-config
- Path
src/skills/mcp-builder/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261024.25cb8e3, committed Oct 24, 2026
- First version recorded
- Jun 3, 2026
- Size
- 8,628 bytes
- Repository stars
- 19
- License
- MIT
Use when building an MCP server in Python (FastMCP) or Node/TypeScript (MCP SDK) — agent-centric tool design, input schemas, error handling, and the 10-question evaluation harness.
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 Author MCP servers that LLMs can drive end-to-end. The quality bar is *can the agent finish the workflow*, not *does the endpoint return 200*. This skill is the **server-author** counterpart to the existing [`mcp`](../mcp/SKILL.md) consumer skill. ## When to use - Wrapping an external API or service as MCP tools for an LLM client. - Adding tools to an existing MCP server (Python FastMCP or TypeScript SDK). - Reviewing an MCP server before shipping — Phase 4 evaluation gate below. Do NOT use when: - You only need to *call* an MCP server — route to [`mcp`](../mcp/SKILL.md). - The integration belongs in the host process — write a regular service, not an MCP server. - The "server" wraps one endpoint with no workflow — a CLI wrapper is enough. ## Procedure: Four phases, one tool at a time ### Phase 1 — Research & plan …
Read the whole file at its exact version.
How to install
mdr add event4u-app/agent-config/mcp-builder@sha256:bcdf20ccce72d00fThe line at the top of this page pins the label git:20261024.25cb8e3, 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_6i3pnlccuv3gc7mx)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Jun 3, 2026 and Oct 24, 2026, about one every 48 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261024.25cb8e3 latest | 2026-10-24 | 25cb8e3 | 8,628 B | A | view · diff |
| git:20260710.2e7d4d2 | 2026-07-10 | 2e7d4d2 | 6,833 B | A | view · diff |
| git:20260613.3248611 | 2026-06-13 | 3248611 | 6,407 B | A | view · diff |
| git:20260603.668ed88 | 2026-06-03 | 668ed88 | 6,482 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 (8628 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
event4u-app/agent-config · 19 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6i3pnlccuv3gc7mx GET https://markdownregistry.com/api/v1/resolve?ref=event4u-app/agent-config/mcp-builder GET https://markdownregistry.com/api/v1/blob/bcdf20ccce72d00fe85f3e41e16926e8860da0901f9bf1371de200a82cdf03dd
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 event4u-app/agent-config
Every file in event4u-app/agent-config