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f3e7eb16c9
The span encoding shipped a concatenated string and a start column, which left the consumer to recover cell boundaries from the text. It cannot: a regional-indicator flag is two one-column cells and must split per codepoint, while a keycap is one cell holding three codepoints and must split per grapheme. Those rules are opposite, and the distinction lives in the grid, not in the string. Any split rule over the concatenated text is wrong for one of the two. So the span carries what the grid knows. `width` is the columns each cluster advances, uniform across a run by construction; `cluster_count` says how many clusters the text holds. Decoding is then arithmetic with no Unicode table anywhere: a count of 1 means the whole text is one cluster, otherwise cluster i is the i-th char at `column + i * width`. Geometry flags are also masked out of the style key. `WIDE_CHAR` and `WRAPLINE` are grid bookkeeping, not appearance, and while they sat in the key they broke runs as a side effect -- hiding the explicit width check behind a coincidence, and splitting the last column off every wrapped row into a span of its own. Row dedup still hashes the full flags, so nothing it needs to see is lost. Eight fixtures cover the contract, including the flag/keycap pair whose opposing rules make the case. Six mutations were run against them and each fails independently: forcing width to 1, dropping the width comparison, never breaking on zerowidth marks, removing WRAPLINE from the mask, removing the mask entirely, and never incrementing cluster_count. Co-authored-by: tlongwell-block <109685178+tlongwell-block@users.noreply.github.com> Signed-off-by: tlongwell-block <109685178+tlongwell-block@users.noreply.github.com>
Buzz
Desktop chat shell with:
- Tauri + React + TypeScript + Vite
- Tailwind CSS
- shadcn/ui-ready shared components
- Biome (lint/format/check)
- Feature-driven frontend structure
Scripts
pnpm dev- run the web frontendpnpm tauri dev- run the desktop apppnpm build- typecheck and build frontendpnpm typecheck- TypeScript checkspnpm lint- Biome lintpnpm format- Biome format (write)pnpm check- Biome check
Structure
src/shared- reusable app-wide code (ui,lib,styles)src/features- feature modules (vertical slices)src/app- top-level app composition