Someone had Claude read all of One Piece — I had Claude Code turn their data into interactive dashboards (in one evening)

A few days ago there was a post here about grandlinearchives.com — an agent pipeline that read all 1,189 One Piece chapters and built a foreshadowing encyclopedia. I loved it, but it's 8,800 pages of text. I wanted to see it. So I pointed Claude Code at it. The result: n0zz.github.io/grand-line-atlas — free, static, open source: github.com/N0zz/grand-line-atlas What it does: - Foreshadowing map — all 3,072 setup→payoff chains drawn as arcs over the chapter axis. You can see Oda's 1,137-chapter cons as one picture. - Timeline — every dataset (seed density, predictions, mysteries, character debuts) as toggleable lenses on one axis, zoom by saga. - Web — start at any character and pull threads through the archive's cross-links. - Plus a nautical map view and a stats observatory (technique×saga heatmap, longest cons, prediction leads). - Spoiler-safe like the original: set your chapter, everything beyond it is hidden. How Claude Code helped: it mocked up 5 different visualization paradigms as local HTML files so I could pick, did a UX review on its own designs, wrote a polite throttled crawler (stdlib Python, resumable, respects robots.txt), a parser that turned 8,799 crawled pages into one 2.3 MB db.js, and five vanilla HTML+SVG dashboards — no frameworks, no build step. Total: one evening of back-and-forth. All analysis belongs to The Grand Line Archives (CC BY 4.0) — every element links back to its source page. I just drew it.