a5c-ai/babysitter · library/specializations/ai-agents-conversational/skills/mcp-app-verification/SKILL.md

mcp-app-verification skillB

mcp-app-verification is agent-read markdown (skill) from a5c-ai/babysitter: Comprehensive verification checklists for MCP Apps. Tests with basic-host reference, validates handler-before-connect, text fallback, resource URI linking, single-file bundling, host styling, CSP, and legacy pattern detection..

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 a5c-ai/babysitter/mcp-app-verification@git:20260601.da7723a
Exact content
mdr add a5c-ai/babysitter/mcp-app-verification@sha256:6567b98e407928db

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_udw7usuuwfmu7frv.svg)](https://markdownregistry.com/a/art_udw7usuuwfmu7frv)

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Versions

versioncommittedcommitsizeaudit
git:20260601.da7723a latest2026-06-01 da7723a 11,954 BB view · diff
git:20260507.44b06c02026-05-07 44b06c0 12,301 BB view · diff
git:20260507.50823d82026-05-07 50823d8 12,266 BB view · diff
git:20260507.313363d2026-05-07 313363d 12,014 BB view · diff
git:20260404.bc2ce972026-04-04 bc2ce97 11,623 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (11954 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

Source

GitHub

a5c-ai/babysitter · 1,800 stars · license MIT · pushed 2026-09-16 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_udw7usuuwfmu7frv
GET https://markdownregistry.com/api/v1/resolve?ref=a5c-ai/babysitter/mcp-app-verification
GET https://markdownregistry.com/api/v1/blob/6567b98e407928dbe81a64e1e5daf06367e115ab9499c1b069d149451a0044f3

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