docs(react-islands): add implementation plan

Twelve TDD tasks covering the approved spec: snapshot cache, store
bridge, marker codegen, .tsx resolution, error boundary, island runtime,
bundling with a shared React chunk, asset serving, route classification,
integration guards, the write-during-render guard, and HMR remount.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
2026-08-18 15:07:32 +05:30
co-authored by Claude Opus 5
parent 4ef2ef14ff
commit a6570d7f68
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