Claude Fable 5.1 on Schedule across four timezones

Passed in 50s. Attempt 1. Run 20260904T131615Z-fable-5-1-schedule-across-timezones-1.

Task

Schedule the all-hands and two one-on-ones

Today is Monday, September 7, 2026. Read request.md, the four attendee calendars, and rooms.ics. Schedule all three requested meetings between Tuesday and Thursday.

Write schedule.json in this exact shape, using timezone-aware ISO 8601 timestamps:

{
  "all_hands": {
    "start": "2026-09-08T08:30:00-07:00",
    "end": "2026-09-08T10:00:00-07:00",
    "room": "Cedar",
    "attendees": ["alex", "blair", "charlie", "dana"]
  },
  "one_on_ones": [
    {"with": "blair", "start": "...", "end": "..."},
    {"with": "charlie", "start": "...", "end": "..."}
  ]
}

Every attendee must be within their own local working hours for the whole meeting. Leave at least 15 clear minutes before and after every supplied calendar event. The all-hands also needs one supplied room with the same gap. The one-on-ones are Alex with the named person and need no room. Do not change any calendar.

Command

claude -p --model claude-fable-5-1 --dangerously-skip-permissions --output-format text 'You are working in the current folder. Do the task in TASK.md and write the outputs to the exact paths it names.
Do not ask questions. When done, stop.

# Schedule the all-hands and two one-on-ones

Today is Monday, September 7, 2026. Read `request.md`, the four attendee calendars, and
`rooms.ics`. Schedule all three requested meetings between Tuesday and Thursday.

Write `schedule.json` in this exact shape, using timezone-aware ISO 8601 timestamps:

` ` `json
{
  "all_hands": {
    "start": "2026-09-08T08:30:00-07:00",
    "end": "2026-09-08T10:00:00-07:00",
    "room": "Cedar",
    "attendees": ["alex", "blair", "charlie", "dana"]
  },
  "one_on_ones": [
    {"with": "blair", "start": "...", "end": "..."},
    {"with": "charlie", "start": "...", "end": "..."}
  ]
}
` ` `

Every attendee must be within their own local working hours for the whole meeting. Leave at
least 15 clear minutes before and after every supplied calendar event. The all-hands also needs
one supplied room with the same gap. The one-on-ones are Alex with the named person and need no
room. Do not change any calendar.'

Output

All three meetings are booked and written to `schedule.json`. I checked every slot with a script against working hours, the 15-minute buffers, and the room calendar, and everything passes.

The all-hands is Tuesday 8:30 to 10:00 AM Pacific in Cedar. That is 11:30 to 1:00 for Blair in New York and 4:30 to 6:00 PM for Charlie in London.

Alex meets Blair Wednesday at 1:00 PM Pacific for half an hour. Alex meets Charlie Thursday at 1:00 PM Pacific for half an hour.

One thing worth knowing: all four people's working hours line up to the same 8 to 4 Pacific window once converted, so nobody is stretched outside their day. No calendars were changed.

Files produced

schedule.json

{
  "all_hands": {
    "start": "2026-09-08T08:30:00-07:00",
    "end": "2026-09-08T10:00:00-07:00",
    "room": "Cedar",
    "attendees": [
      "alex",
      "blair",
      "charlie",
      "dana"
    ]
  },
  "one_on_ones": [
    {
      "with": "blair",
      "start": "2026-09-09T13:00:00-07:00",
      "end": "2026-09-09T13:30:00-07:00"
    },
    {
      "with": "charlie",
      "start": "2026-09-10T13:00:00-07:00",
      "end": "2026-09-10T13:30:00-07:00"
    }
  ]
}

Checker

{"passed": true, "score": 1.0, "notes": "all schedule constraints passed"}

Judge

Not used for this task.