A reader got stuck at step 3 because the post never says where the full
stlview.js comes from: the only link to it was in the intro paragraph,
and the code block in that step is an explanatory excerpt rather than the
whole file. Link the source from the footer template step and from step 3
itself, say the snippets are partial, and note where each asset in the
file tree comes from.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>