The Agent Skills Directory

[NO_CODE]: The skill consists exclusively of static Markdown and CSS files. It does not ship with any executable scripts (Shell, Python, JavaScript) that run on the host environment.
[EXTERNAL_DOWNLOADS]: The skill provides a structured workflow for the agent to fetch live browser support metadata and documentation from well-known and trusted platforms: unpkg.com (for web-features and MDN compatibility data) and developer.mozilla.org. These are legitimate developer tools used to ensure information accuracy.
[PROMPT_INJECTION]: The fetch workflow for MDN data creates an indirect prompt injection surface as the agent is instructed to ingest and process data from external URLs.
Ingestion points: references/live-mdn-fetch.md describes fetching JSON and Markdown from unpkg.com and developer.mozilla.org.
Boundary markers: Absent. The instructions do not specify explicit delimiters for the external content.
Capability inventory: references/rules/browser-verification.md encourages the agent to use browser-based tools (MCP servers) for rendering verification, which includes navigating to URLs and executing simple JavaScript (CSS.supports).
Sanitization: Absent.
[COMMAND_EXECUTION]: Instructions in references/rules/browser-verification.md guide the agent to use standard browser automation tools (MCP servers) for Render Checks and Computed Style Inspection. These are development-oriented tools and do not involve arbitrary host command execution.

css-first