HTML のアクセシビリティ簡易チェック

What it does

Reads HTML files or a built folder and lists accessibility problems that can be detected reliably by a machine.

• Images without alt, or with a file name or a generic word as alt
• Form fields without a label (placeholder alone is flagged)
• Missing <html lang> or <title>
• Heading level skips (h2 followed by h4) and pages without an h1
• Links and buttons with no text or accessible name
• Vague link text such as "click here", "read more" and common Japanese equivalents
• Duplicate ids, iframes without title, positive tabindex, viewport settings that block zoom

Each finding includes file, line, column, a CSS selector and an example fix.

How to use

python scripts/a11y_check.py dist --md a11y-report.md --json a11y-report.json

The agent verifies the findings and points to the template or content that needs to change.

Requirements

• Python 3 (standard library only)

Caveats

• This is a quick static check, not a WCAG conformance audit.
• Colour contrast, keyboard operation and the quality of alt text still need a human review, and the report says so.
• Content rendered later by JavaScript is not included.