2026-06-25-pm-handoff-v1

⟦tag:v2|task|2026-06-25-pm-handoff-v1⟧ kind: task id: 2026-06-25-pm-handoff-v1 objective: 让后续会话通过 index + card 读懂 tag，并用摘要包完成跨会话交接 scope: docs/pm-agent-lean-efficiency.md, docs/handoff/** acceptance: index exists; one role card, one task card, one session card exist; startup prompt exists; a fresh session can read order and continue without历史 replay current state: verified blockers: none next action: none

summary:

• A/B/C 回包已收齐，并已落入 session 摘要。
• 本轮 PM loop 已 summarized；如需下一轮，只能用新的 tag refs 重新开轮。