mcp-csp-investigation SKILL.md skillA
mcp-csp-investigation from a5c-ai/babysitter is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add a5c-ai/babysitter/mcp-csp-investigation@git:20260601.da7723aPins git:20260601.da7723a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- a5c-ai/babysitter
- Path
library/specializations/ai-agents-conversational/skills/mcp-csp-investigation/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260601.da7723a, committed Jun 1, 2026
- First version recorded
- Apr 4, 2026
- Size
- 9,420 bytes
- Repository stars
- 1,896
- License
- MIT
Comprehensive Content Security Policy audit for MCP Apps in sandboxed iframes. Discovers all network origins, traces them to source, and generates CSP configuration for registerAppResource.
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-csp-investigation Perform exhaustive Content Security Policy audits for MCP Apps running in sandboxed iframes where all network requests fail SILENTLY without proper CSP declarations. ## Overview MCP Apps run in sandboxed iframes with no same-origin server. This means: - **ALL network requests fail silently** without CSP -- no errors, no warnings, just silent failure - Every external origin (CDN, API, font, image, WebSocket) must be declared in CSP - CSP is configured in the `contents[]` return from the `registerAppResource` read callback - Missing even ONE origin causes that resource to silently not load This skill provides a systematic methodology for discovering every network origin an app uses, tracing each to its source, and generating the correct CSP configuration. ## Capabilities ### Build Output Analysis - Build the application and capture all output files (HTML, CSS, JS, assets) - Search every file for network origin references - Identify fetch/XHR targets, script sources, link hrefs, image sources, font URLs, iframe sources, WebSocket endpoints ### Origin Tracing - Trace each discovered origin to its source in the codebase …
Read the whole file at its exact version.
How to install
mdr add a5c-ai/babysitter/mcp-csp-investigation@sha256:70e54f99815f3c00The line at the top of this page pins the label git:20260601.da7723a, 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_wi3gmc6pcwcacutf)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 4, 2026 and Jun 1, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260601.da7723a latest | 2026-06-01 | da7723a | 9,420 B | A | view · diff |
| git:20260507.44b06c0 | 2026-05-07 | 44b06c0 | 9,678 B | A | view · diff |
| git:20260507.50823d8 | 2026-05-07 | 50823d8 | 9,655 B | A | view · diff |
| git:20260507.313363d | 2026-05-07 | 313363d | 9,403 B | A | view · diff |
| git:20260404.bc2ce97 | 2026-04-04 | bc2ce97 | 9,101 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 (9420 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
a5c-ai/babysitter · 1,896 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wi3gmc6pcwcacutf GET https://markdownregistry.com/api/v1/resolve?ref=a5c-ai/babysitter/mcp-csp-investigation GET https://markdownregistry.com/api/v1/blob/70e54f99815f3c003bdb3cf5b4b844f253f8163cd7b5c8daa71ee72e07bbf564
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.