Use zfeats for plans

Instructions

1. Create or open a zfeats markdown file named after the feature (kebab-case) under zfeats/ (e.g., zfeats/new-feature.md).
2. At the top, add a short context/goal, then enumerate steps as checkbox lines only: - [ ] step detail (no unchecked bullets without boxes).
3. Steps should be actionable, scoped, and ordered; avoid vague items. Split big steps until each can be finished in one go.
4. When implementing, work from the checklist in order. After completing a step, immediately update the same file to - [x] ... with any brief note if useful.
5. If new work is discovered, append new - [ ] items; do not delete history unless invalid—strike or annotate instead.
6. Keep the checklist as the source of truth while coding; ensure code changes correspond to items and mark them done only after verification/tests for that step.
7. When finished, ensure all planned items are - [x] or explicitly documented as deferred.

Example prompts

• "为多平台支持写一份 zfeats 计划并开始执行"
• "把发送队列优化拆分为清单，完成第一步并勾选"
• "查看并更新 zfeats/msg-queue.md 的完成情况"