html-structure-validate

HTML5 validation checks that your document has proper DOCTYPE, complete html, head, and body tags, correct nesting, closed tags, and required metadata. This Skill performs structural compliance checks on generated HTML files and returns a JSON report with validation status and exit codes (0 for valid, 1 for invalid) to control pipeline progression.

Yes. This Skill stops the pipeline immediately if structural errors are detected, preventing malformed HTML from progressing downstream. It provides actionable error messages and exit codes so you can halt or retry processing before deployment.

The Skill verifies DOCTYPE declaration, proper tag hierarchy, head and body container structure, well-formed tag closure and nesting, essential metadata presence, and resource link validity. It ensures your HTML meets web standards and renders consistently across browsers.

Run validation immediately after AI generates an HTML page to catch structural errors early. Use it as a deterministic quality gate before any further processing, optimization, or deployment to ensure the file is valid HTML5 before downstream steps.

The Skill generates a structured JSON validation report detailing compliance status, specific structural violations, and an exit code (0 for valid documents, 1 for invalid). Use the report and exit code to decide whether to proceed or halt the pipeline.

No prerequisites beyond your generated HTML file. This Skill handles deterministic HTML5 compliance checking without additional dependencies, loading the file, performing syntax and structure checks, and returning validation results in a structured format.