飞书智能日历。calendar suggestion 找参会人共同空闲时段； calendar room-find 按容量/时段筛会议室；calendar rsvp 接受/拒绝邀请。 HTTP 直调 freebusy/suggestion + freebusy/room_find（SDK v3.5.3 未暴露）， 自动 429 退避（DoWithRetry）。 当用户请求"找开会时间"、"找空闲时段"、"找会议室"、"接受/拒绝会议邀请"、 "freebusy"、"日程冲突检测"时使用。
This skill does not declare a tool allowlist. The agent host applies whatever default tools are available at runtime.
SKILL.md / Manifest
https://raw.githubusercontent.com/riba2534/feishu-cli/main/skills/feishu-cli-calendar/SKILL.mdRegistry
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