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Muse Spark 1.3 on Find shared calendar slots

Passed in 21s. Attempt 2. Run 20260904T115653Z-muse-spark-1-3-calendar-slots-2.

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

opencode run --dir /tmp/atris-bench/20260904T115653Z-muse-spark-1-3-calendar-slots-2/work --auto -m opencode/muse-spark-1.3-contributor-free '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

Finding three times you’re both free.
I’ve lined up three open slots — now I’ll double-check they work before finishing.
Wrote `slots.json` with three verified 30-minute slots, all Tue–Fri 9–5 Pacific, free for both and not touching any event boundary.


[stderr]

> build · muse-spark-1.3-contributor-free

→ Read alice.ics
→ Read request.md
→ Read bob.ics

$ pwd && ls
/private/tmp/atris-bench/20260904T115653Z-muse-spark-1-3-calendar-slots-2/work
alice.ics
bob.ics
request.md
TASK.md

← Write slots.json
Wrote file successfully.

$ python3 -c "
import json
slots=json.load(open('slots.json'))
print(slots)
# verify no touch etc.
busy={'2026-09-08':[('09:00','10:00'),('13:00','14:00'),('10:30','11:30'),('15:00','16:00')],
'2026-09-09':[('11:00','12:00'),('09:00','10:00'),('13:00','14:00')],
'2026-09-10':[('15:00','16:00'),('10:00','11:00'),('14:00','15:00')]}
for s in slots:
    d=s['start'][:10]; st=s['start'][11:16]; en=s['end'][11:16]
    assert st<'17:00' and en<='17:00' and st>='09:00'
    assert (int(en[:2])*60+int(en[3:])-(int(st[:2])*60+int(st[3:]))==30)
    for b in busy[d]:
        assert not (st < b[1] and en > b[0]), f'overlap {s} {b}'
        assert st != b[0] and st != b[1] and en != b[0] and en != b[1], f'touch {s} {b}'
    print(d, st, en, 'OK')
"

[{'end': '2026-09-08T12:15:00-07:00', 'start': '2026-09-08T11:45:00-07:00'}, {'end': '2026-09-09T15:30:00-07:00', 'start': '2026-09-09T15:00:00-07:00'}, {'end': '2026-09-10T12:00:00-07:00', 'start': '2026-09-10T11:30:00-07:00'}]
2026-09-08 11:45 12:15 OK
2026-09-09 15:00 15:30 OK
2026-09-10 11:30 12:00 OK


Files produced

slots.json

[{"end": "2026-09-08T12:15:00-07:00", "start": "2026-09-08T11:45:00-07:00"}, {"end": "2026-09-09T15:30:00-07:00", "start": "2026-09-09T15:00:00-07:00"}, {"end": "2026-09-10T12:00:00-07:00", "start": "2026-09-10T11:30:00-07:00"}]

Checker

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

Judge

Not used for this task.