Feishu Calendar Conflict Detector

⚠️ Pre-requisites

• ✅ Time format: ISO 8601 / RFC 3339 (with timezone), e.g. 2026-03-31T14:00:00+08:00
• ✅ Batch query: Can check up to 10 users at once
• ✅ user_open_id needed: Get from message context SenderId

📋 Quick Reference

🛠️ Usage

1. Check Single User Availability

{
  "action": "list",
  "time_min": "2026-03-31T09:00:00+08:00",
  "time_max": "2026-03-31T18:00:00+08:00",
  "user_ids": ["ou_xxx"]
}

Response format:

{
  "busy_slots": [
    {"start": "2026-03-31T10:00:00+08:00", "end": "2026-03-31T11:00:00+08:00"},
    {"start": "2026-03-31T14:00:00+08:00", "end": "2026-03-31T15:30:00+08:00"}
  ],
  "free_slots": [
    {"start": "2026-03-31T09:00:00+08:00", "end": "2026-03-31T10:00:00+08:00"},
    {"start": "2026-03-31T11:00:00+08:00", "end": "2026-03-31T14:00:00+08:00"},
    {"start": "2026-03-31T15:30:00+08:00", "end": "2026-03-31T18:00:00+08:00"}
  ]
}

2. Check Multiple Users Availability

{
  "action": "list",
  "time_min": "2026-03-31T09:00:00+08:00",
  "time_max": "2026-03-31T18:00:00+08:00",
  "user_ids": ["ou_xxx", "ou_yyy", "ou_zzz"]
}

Result: Returns common free time slots when ALL users are free.

3. Find Available Meeting Slots

Algorithm:

1. Get busy slots for all attendees
2. Find gaps between busy slots
3. Filter by minimum meeting duration
4. Return available windows

Example: 2-hour meeting, 3 attendees

{
  "action": "list",
  "time_min": "2026-03-31T09:00:00+08:00",
  "time_max": "2026-03-31T18:00:00+08:00",
  "user_ids": ["ou_xxx", "ou_yyy", "ou_zzz"]
}

Suggested slots (if busy 10-11, 14-15:30):

• 09:00-10:00 ✓
• 11:00-14:00 ✓
• 15:30-18:00 ✓

4. Conflict Warning

Before creating a meeting, warn user if conflicts exist:

{
  "action": "list",
  "time_min": "2026-03-31T10:00:00+08:00",
  "time_max": "2026-03-31T11:00:00+08:00",
  "user_ids": ["ou_xxx", "ou_yyy"]
}

If response shows busy slots in this time range → Conflict detected!

💰 Pricing

📝 Example

User says: "看一下明天上午10点张三和李四有没有空"

Execute:

1. Search for 张三 and 李四 to get open_ids
2. Query free/busy for tomorrow morning 09:00-12:00
3. Check if 10:00-11:00 is in free slot
4. Report availability

Response: "张三和李四在明天上午10点都OK，没有冲突 ✓"

🔧 Tips

• Query 30 minutes before/after desired time for buffer
• Consider user's working hours (default: 09:00-18:00)
• For international teams, account for timezone differences
• Use "tentative" status as "may be busy" warning