- docs/zh/plans: finished plans move to completed/ (the RIIR series, the
event-bridge and dependency plans, the v04 manual test plan).
- New design docs: the external (functional) plugin system
(process-isolated, JSON-RPC/shm) and its protocol.
- ai-agent-design refreshed; README pointers follow the moves.
Move the finished migration campaign docs (handoffs v3-v6, roadmap,
R5 guides, R6 cleanup, R7 pure-ABI) from docs/zh/ into
docs/zh/plans/completed/ with an archive README; fix all
cross-references; refresh plans/README.md index (active plans now
marked unlocked).
Mike-Solar