GitHub Username Ideas: 6 Patterns That Pass the Rules
GitHub username ideas that pass the real rules: no underscores, 39 characters max, single hyphens. Six patterns that age well, plus why a 404 can lie.
Markdown Anchor Link: Why {#id} Breaks on GitHub
How a markdown anchor link finds its target, why {#custom-id} fails on GitHub, and the one HTML anchor that worked in all 9 renderers we tested.
Markdown Nested List: Why Two Spaces Isn't Enough
Two spaces nests a bullet list but silently flattens a numbered one. The indent rule that decides, tested in three markdown engines, and the fixes.
Markdown Collapsible Section: The Blank Line Rule
A Markdown collapsible section is HTML, not Markdown. One blank line after the summary tag decides whether your bold and lists render or not.
Markdown Comment: Why Yours Shows Up on the Page
Markdown has no comment syntax. See what each hiding trick really does to your HTML, why notes leak into View Source, and the one that vanishes.
NFC Business Card: The Chip Only Holds a URL
An NFC business card's chip holds 144 bytes. A real vCard needs 390. Here's what actually gets written to the tag, and why the URL is the product.
Blinq vs HiHello: Where Each Free Plan Stops
Blinq vs HiHello compared on free-tier caps, real annual pricing, API access and contact export — with the numbers pulled from both vendors' own pages.
Twitter Card Validator Is Behind a Login Wall Now
X's Twitter Card Validator now redirects to a login wall. Here's exactly what X still reads from your markup, and how to preview a card without it.
Markdown Table of Contents: Why Your Links 404
Markdown has no table of contents syntax. Here's how GitHub builds heading anchors, why hand-written TOC links break, and what actually works.
LaTeX Resume Template: 7 Picks and the ATS Trap
Seven LaTeX resume templates checked against what a parser actually reads, plus the two preamble lines that decide whether an ATS can read yours.
Markdown Blockquote: Why It Ate the Next Line
A markdown blockquote is just a > character — until the CommonMark laziness rule swallows your next paragraph. The spec rules, nesting, and GitHub alerts.
Markdown Checkbox: Why Yours Renders as Text
Your markdown checkbox renders as literal text when the space is missing. Here's the exact GFM syntax, why it fails outside GitHub, and how to fix it fast.