[Bug] detect: .astro/.jsx/.svelte/.vue scans miss rules that .html catches on byte-identical content, so "0 findings" reads as health #884

A framework source file and an .html file containing byte-identical markup produce different findings. The framework path catches strictly fewer rules, so a clean scan of a component tree is not evidence that the tree is clean.

Repro

One body, written to five extensions with identical bytes:

<div>
  <p style="font-size:8px">tiny functional label</p>
  <a href="#" style="font-size:9px">Pause</a>
  <h1 style="background:linear-gradient(90deg,#f00,#00f);-webkit-background-clip:text;color:transparent">Gradient heading</h1>
</div>

for ext in html astro jsx svelte vue; do printf %s "$BODY" > "probe.$ext"; done
for ext in html astro jsx svelte vue; do impeccable detect "probe.$ext"; done

Same bytes. tiny-text and undersized-ui-text are silently dropped for all four framework extensions.

Impact on a real project

Scanning an Astro site’s source returned 0 findings across 11 .astro files:

impeccable detect packages/marketing/src/          → 0 anti-patterns found  (exit 0)

Those same files demonstrably contain font-size: 8px, 9px and 10px — the exact values the rules above exist to catch — and the browser/URL scan of the built output found them. exit 0 on a component tree therefore reads as a clean bill of health when it is coverage loss.

That is the real harm: a user who scans src/ and sees zero has no signal that the scan was shallow.

Expected

Either bring the framework-file path up to parity with .html for rules that only need markup plus inline style, or — if parity is not practical — make the reduced coverage explicit in the output, e.g. a line stating which rule families were skipped for these extensions, so 0 findings cannot be mistaken for no problems.

Environment

• skill 4.3.1, engine 0.1.5 (darwin-arm64), macOS 15.6
• The extension allowlist in the binary includes astro, jsx/tsx, svelte, vue, mdx, php, erb, hbs, so this likely affects every non-HTML template language it accepts