The finish line

A closed stream builds its own deck.

Stream: finish_line · closed 2026-07-03

What it built

  • A skill that turns a finished stream into a slide deck.
  • Question it answers: when a stream closes, who presents it?
  • Answer: the stream itself does — self-contained, from its own notes.
  • Triggers whenever any stream but quick_tasks flips state: done.

How we built it — the skill

  • Layered on marp-magic, one idea per slide.
  • Theme graph_paper; Arctic Frost style guide for a cool, content-first look.
  • Input is self-contained: only the stream file and its dir.
  • Output home: presentations/<stream>_<date>/deck.md, Marp source.

How we built it — variant and validation

  • Added a science-stream preface: sim streams open with results vs hypothesis.
  • Figures come only from the pipeline, no metric outside data_analyzer.py.
  • Dogfooded on facade-retirement — a real closed stream.
  • HTML blocker cleared: the website stream already shipped site-convert.

What we learned — the skill holds

  • Every SKILL.md step was followable as written — no skill bugs.
  • A refactor stream (no sims) skips the science preface correctly.
  • No term qualified, so the slide says so — never a fabricated citation.

What we learned — offline marp-cli

  • npx @marp-team/marp-cli --version failed offline: EPERM, root-owned ~/.npm cache.
  • That is a broken local npm cache — NOT a "package missing" signal.
  • One attempt per brief, then validate deck structure by eye.
  • Compare against existing graph_paper decks: frontmatter, separators, directives.

Side effects

  • The Arctic Frost wiring lives outside the repo, in ~/.claude/skills/marp-magic/SKILL.md.
  • That style-guide line is not committed — it travels with the machine, not the tree.
  • HTML conversion leaned on the website stream's converter, adding nothing here.

New terminology

No new terms coined or pinned this stream.

finish-line, Arctic Frost, and graph_paper are a skill name, a bundled palette, and a theme file — none is an independently sourced term in notes/terminology.md, so none gets a slide. (Same call as the facade-retirement deck.)

What comes next

  • Stream is done — all five tasks ticked, no blockers.
  • Deferred: the science-stream preface is written but never run — no sim stream has closed to dogfood it.
  • Watch: the Arctic Frost wiring is uncommitted and outside the repo.