Slate v2 Human Editing Stress Sweep

Status

Done for this sweep slice.

Goal

Use the real debug browser to stress test Slate v2 examples like a human editor and surface browser-visible editing bugs.

Scope

• Active code repo: /Users/zbeyens/git/slate-v2.
• Browser target: local Slate v2 example app, expected at http://localhost:3100.
• Tooling: dev-browser --connect http://127.0.0.1:9222.
• Scenario families:
  • focus/click into editor
  • plain typing and deletion
  • select-all replacement
  • enter/split blocks
  • backspace/delete at text and block boundaries
  • undo/redo
  • paste plain text and multi-line text
  • mark toggles with selection
  • list/checklist toggles where present
  • inline/void interaction where present

Non-Goals

• Do not continue placeholder-only testing.
• Do not treat one flaky automation run as a product bug.
• Do not patch route-specific oddities unless they reproduce as real human editing failures.

Plan

1. Inventory editable examples and choose a representative route matrix.
2. Run a fast browser stress pass to discover failures.
3. Re-run any suspicious result with a smaller targeted script and stronger focus/selection assertions.
4. Classify findings:
   • confirmed shared editor bug
   • route/example bug
   • harness artifact
   • out of scope
5. Patch only confirmed bugs if the owner is clear.
6. Add focused package or browser contract coverage for patched behavior.
7. Update this plan and active goal state before handoff.

Evidence Log

• 2026-04-26: User asked to stress test all editing scenarios like a human with dev-browser.
• 2026-04-26: Route inventory found editable examples under /Users/zbeyens/git/slate-v2/site/examples/ts. First pass will cover: plaintext, richtext, hovering-toolbar, markdown-shortcuts, markdown-preview, check-lists, tables, inlines, mentions, images, embeds, editable-voids, paste-html, code-highlighting, forced-layout, styling, android-tests, scroll-into-view, search-highlighting, highlighted-text, review-comments, persistent-annotation-anchors, large-document-runtime, and huge-document.
• 2026-04-26: Generic scenarios: click/focus, type, Enter, Backspace/Delete, select-all replacement, undo/redo, plain-text paste, focus/selection retention, and console/page error capture.
• 2026-04-26: Specific probes: richtext toolbar mark/block buttons, markdown shortcuts/backspace, checklist checkbox interaction, table boundary keys, inline insertion controls, mention trigger/menu, and void image/embed/editable-void adjacency.
• 2026-04-26: First broad artifact: /Users/zbeyens/.dev-browser/tmp/slate-v2-human-editing-stress-results.json. Most initial failures were harness noise from the paste probe, but the route sweep surfaced real candidates.
• 2026-04-26: Confirmed v2 vs legacy regression with real Meta+V: multiline plain-text paste after select-all replacement lost the first line in plaintext and richtext; legacy preserved both lines.
• 2026-04-26: Confirmed forced-layout threw a page error on the same real paste flow before the fix.
• 2026-04-26: Confirmed scroll-into-view route crash: the file existed and getAllExamples() exposed it, but the dynamic import map and constants did not include the route.
• 2026-04-26: Fixed multiline paste by syncing the implicit transaction target after the full-document Editor.replace text insertion path in /Users/zbeyens/git/slate-v2/packages/slate/src/transforms-text/insert-text.ts.
• 2026-04-26: Added regression coverage in /Users/zbeyens/git/slate-v2/packages/slate-dom/test/clipboard-boundary.ts.
• 2026-04-26: Fixed the scroll-into-view route by adding it to /Users/zbeyens/git/slate-v2/site/constants/examples.ts and /Users/zbeyens/git/slate-v2/site/pages/examples/[example].tsx.
• 2026-04-26: Remaining notable finding not fixed in this slice: mentions logs invalid HTML nesting (<div> inside <p>) from the inline mention renderer. The actual mention insertion flow still worked in the targeted browser probe.
• 2026-04-26: Verification:
  • bun test ./packages/slate-dom/test/clipboard-boundary.ts --bail 1
  • bun test ./packages/slate/test/primitive-method-runtime-contract.ts --bail 1
  • dev-browser --connect http://127.0.0.1:9222 proof for plaintext, richtext, forced-layout, and scroll-into-view
  • bunx turbo build --filter=./packages/slate --filter=./packages/slate-dom --force
  • bunx turbo typecheck --filter=./packages/slate --filter=./packages/slate-dom --force
  • bun typecheck:site
  • bun run lint:fix
  • bun run lint

Changeset

Required if published package behavior changes.