Claude Fable 5.1 on Find shared calendar slots

Passed in 18s. Attempt 1. Run 20260904T112157Z-fable-5-1-calendar-slots-1.

Task

Find three shared calendar slots

Read request.md, alice.ics, and bob.ics.

Write slots.json as a JSON array with at least three objects. Each object must have start and end timestamps in ISO 8601 with the Pacific offset, for example:

[{"start":"2026-09-08T10:00:00-07:00","end":"2026-09-08T10:30:00-07:00"}]

Every slot must follow the requested work hours and duration, be free for both people, and leave some space rather than starting or ending at the exact instant of an existing event.

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.

# Find three shared calendar slots

Read `request.md`, `alice.ics`, and `bob.ics`.

Write `slots.json` as a JSON array with at least three objects. Each object must have `start`
and `end` timestamps in ISO 8601 with the Pacific offset, for example:

` ` `json
[{"start":"2026-09-08T10:00:00-07:00","end":"2026-09-08T10:30:00-07:00"}]
` ` `

Every slot must follow the requested work hours and duration, be free for both people, and leave
some space rather than starting or ending at the exact instant of an existing event.'

Output

Done. Three slots are written to `slots.json` and I checked each one against both calendars.

Tuesday 12:00 to 12:30. Wednesday 3:00 to 3:30. Thursday 12:00 to 12:30. All Pacific time, all with at least 30 minutes of clear space on both sides of every existing meeting.

Files produced

slots.json

[
  {"start":"2026-09-08T12:00:00-07:00","end":"2026-09-08T12:30:00-07:00"},
  {"start":"2026-09-09T15:00:00-07:00","end":"2026-09-09T15:30:00-07:00"},
  {"start":"2026-09-10T12:00:00-07:00","end":"2026-09-10T12:30:00-07:00"}
]

Checker

{"passed": true, "score": 1.0, "notes": "3/3 slots valid"}

Judge

Not used for this task.