The Agent Skills Directory

[COMMAND_EXECUTION]: The skill provides utility commands for image optimization using common tools and libraries.
Includes Python snippets using the Pillow library to resize and optimize images (PIL.Image).
Includes Bash commands for cwebp, sips, and sharp (Node.js) to convert images to modern formats like WebP.
These commands are intended for local execution by the user to optimize project assets.
[PROMPT_INJECTION]: The skill features an indirect prompt injection surface as it is designed to ingest and process external data in the form of PageSpeed reports or URLs.
Ingestion points: PHASE 1 and 2 involve parsing user-provided report text or site content.
Boundary markers: None explicitly defined in the instructions.
Capability inventory: The agent can generate code snippets, modify configuration files (TOML/JSON), and suggest shell commands.
Sanitization: The skill follows a rigid, step-by-step batch workflow which acts as a structural control against arbitrary instruction following from untrusted data.
[EXTERNAL_DOWNLOADS]: The skill references well-known external services for legitimate web development purposes.
Fetches fonts and CSS from Google Fonts (fonts.googleapis.com, fonts.gstatic.com).
Provides examples of fetching RSS data from api.rss2json.com for demonstration of build-time optimization.
References standard verification tools such as securityheaders.com and Google's Rich Results Test.

pagespeed-enhancer