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Slate v2 Phase 9 Richtext Decision

docs/plans/2026-04-06-slate-v2-phase9-richtext-decision.md

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Slate v2 Phase 9 Richtext Decision

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

Goal

Make the richtext family less vague in the replacement envelope.

Scope

  • add one legacy richtext row to the replacement compatibility matrix
  • use that evidence to sharpen the family ledger
  • keep the current v2 side honest by not inventing a fake richtext surface

Constraints

  • no pretend current richtext parity
  • no broad richtext implementation batch hidden inside a matrix slice
  • verify through the cross-repo local runner on current port 3010

Progress

  • added one legacy richtext row to the replacement compatibility matrix
  • proved the row through the cross-repo local runner
  • used that evidence to sharpen the family ledger:
    • richtext is now comparison-only
    • not vague not-yet-covered
  • synced the scoreboard and top-level v2 docs so the landed Phase 9 slice is visible in the roadmap stack
  • verification:
    • bash ./scripts/run-cross-repo-local.sh 3010 /examples/rich-inline ../slate 3210 /examples/richtext "yarn build:slate-browser:playwright && yarn exec playwright test playwright/integration/examples/replacement-compatibility.test.ts --project=chromium --workers=1"