Individual skill
mcp-csp-investigation
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.
library/specializations/ai-agents-conversational/skills/mcp-csp-investigation/SKILL.md
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# 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.
