A GitHub profile README builder — compose a profile from 17 blocks or 12 templates, preview it exactly as GitHub will render it, and export the Markdown. No account, no backend.
01 / The problem
A memorable GitHub profile README takes hours of copying snippets, fixing broken image URLs, and pushing again and again just to see how GitHub renders it. Reahu turns that into a visual workflow — without asking anyone for an account or storing their draft.
02 / Key decisions
Decision 01
A profile is an ordered array of typed blocks, and each block type has a pure renderer that turns its props into Markdown. The render core and configuration never import Vue, so the Markdown pipeline is tested without the interface.
Decision 02
A share link compresses the whole document into the URL fragment, which browsers never send to the server — so sharing needs no storage at all.
Trade-off
A link can carry a document someone else wrote, so the preview sanitizes everything it renders, and oversized or malformed payloads are rejected before they load.
Decision 03
Adding a block means adding its props, a renderer, a definition, and an editor — and type-checking fails if any block is missing from the renderer registry or the palette, so a half-added block cannot ship.
Decision 04
Saved and shared documents are validated on load: properties added in newer versions are filled in with defaults, unknown ones are dropped, and the builder keeps working when browser storage is blocked.
03 / Outcome
04 / Inside the product
05 / Technologies
06 / Public resources