Slate v2 slate-react Surface Split Phase 8

Supporting plan. For current queue and roadmap truth, see master-roadmap.md.

Goal

Finish the Phase 8 docs slice that makes the slate-react stable-vs-advanced surface explicit.

Scope

• packages/slate-react/README.md
• supporting replacement-candidate docs that describe the current public surface
• roadmap/docs sync in plate-2

Constraints

• no API churn
• no fake “stable forever” claim
• keep advanced exports public when they still serve real runtime work
• make the stable editor-facing surface obvious for migration and package users

Progress

• updated packages/slate-react/README.md to split:
  • stable editor-facing surface
  • advanced runtime surface
• updated public replacement docs in slate-v2 so the same split is visible at the repo level
• synced the plate-2 roadmap stack so Phase 8 now records the docs split as a landed slice
• verification:
  • yarn prettier --check packages/slate-react/README.md docs/general/replacement-candidate.md Readme.md
  • pnpm exec prettier --check docs/slate-v2/package-end-state-roadmap.md docs/slate-v2/overview.md docs/slate-v2/final-synthesis.md docs/slate-v2/cohesive-program-plan.md docs/plans/2026-04-06-slate-v2-react-surface-split-phase8.md