03 / Study notebook
Keep the excluded values.
Algebra practice turned into a useful reminder about software: simplifying a rule can erase information about where it applies.
Read the original notedomain firstpreserve what the shortcut would hide
Selected work / September 2026
Open the lid.
Two small technical demonstrations and a study notebook. The demonstrations use fictional material. None is commissioned client work.
01 / Data rulesRunnable sample
match code + unit flag ambiguous rowsreturn review_required
02 / Web checksSource report
five heuristics five readable findingsone narrow boundary
Inside the HTML review
From a finding to a correction.
A fictional bicycle-repair page, with five deliberately introduced source issues. Each finding below has a specific correction in the supplied after fixture.
- TitleAdd a descriptive page title.
- ViewportAdd the device-width viewport declaration.
- ImageAdd alt text based on the fixture's stated image assumption.
- Duplicate IDKeep the booking destination unique.
- LinkPoint the placeholder link to the booking section.
The checker reports five findings before and zero after on these fixtures. It uses source heuristics. It does not render the page, test a booking service or certify accessibility. The image and booking service are not supplied.
Inspect the individual source and result files
Unzip the complete sample, open a terminal in its folder, then run with Node.js 20 or later:
node check-html.mjs samples/before.html before-result.json
node check-html.mjs samples/after.html after-result.jsonThe source filenames are preserved inside the ZIP. The browser links display them as text.