Diff rendering — the stack

one virtualized CodeView · React chrome via portals · tokenization in workers
Server plannotator binary · localhost Data shaping main thread · once per diff Pierre CodeView @pierre/diffs 1.2.8 · one scroller, all files React chrome ours · rendered via portals Worker pool min(cores−1, 3) rawPatch initialItems render window portal onScroll rAF · 1/frame highlight requests themed tokens → swap in onPostRender fetch contents updateItem · scroll-idle one shared fetch per patch theme pair version++ /api/diff rawPatch · one string git · PR · workspace modes /api/file-content old + new full contents worktree / checkout reads /api/semantic-diff sem CLI per (patch, cwd) ok results cached failures memoized 30s — requests never drive sem rate parseDiffToFiles split on "diff --git" → DiffFile[] · ± counts status: A / D / R / modified buildItemIdentity path-based item ids dup paths → ?2 / ?deleted cacheKey = id#patchHash Lazy content augmentation visibility-triggered one fetch per item per diff consistency guard vs patch applies queued until 150ms of scroll quiet — never mutates layout mid-gesture Virtualizer render window + element recycling scroll anchor · corrective scrollTo sticky headers · 12M-px paged scroll contain:strict · overflow-anchor:none paints plaintext first, colors async Item store fileDiff · version · collapsed · annotations state lives HERE, not in React updateItem() = re-measure + anchor fix Slot coordinator per-item header + annotation slots republishes only on item lifecycle reportVisibleFile cached accessors — zero forced reflow rAF-coalesced · at-bottom override FileHeader status icon · old → new viewed · git add · comment copy diff · collapse sem badge (per file) responsive via RO InlineAnnotation anchored to side+line → exported as agent feedback on submit FileTree A / D / R markers ± counts · staged · viewed follows your scroll click → scrollTo(item) Pool manager task queue AST LRU (100) readiness-gated mount · 5s escape hatch shiki-js ×3 TextMate tokenize off main thread inlined blob worker (single-file build)
packages/review-editor · AllFilesCodeView.tsx · workerPool.tsx

    Click anything

    node detail

    Every box is clickable. The chips up top animate the paths — initial load, scrolling, highlighting, expand-context, annotations, and sem badges.