Two topics, one lesson each: a short primer, links to primary documentation, and exercises to prove the concept has stuck. Start with Scripting Fluency.
This trail is narrower than its original placeholder scope
The original placeholder described HTML/CSS/JS foundations broadly. These two lessons are the job-market-driven subset built so far — general scripting fluency and the production practices around any language — not a full HTML/CSS/JS curriculum.
One module here is a flagged gap-priority
Full-Stack Production Bar was Tom's #10 self-identified gap from the job-hunting skills scan — sequenced second, after Scripting Fluency, since it builds on that lesson's language vocabulary.