Muse Spark 1.3 on Schedule across four timezones
Passed in 50s. Attempt 3. Run 20260904T132256Z-muse-spark-1-3-schedule-across-timezones-3.
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
opencode run --dir /tmp/atris-bench/20260904T132256Z-muse-spark-1-3-schedule-across-timezones-3/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.
# 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
Starting your three meetings — checking calendars and rooms for open slots.
I've mapped everyone's working hours to the same window — now I'll hunt for slots that clear all the buffers.
All three time slots check out — I'll write the final schedule now.
Wrote `schedule.json` with all-hands Tue 08:30–10:00 PT in Cedar and both one-on-ones Tue afternoon, all within working hours with 15-minute buffers.
[stderr]
[0m
> build · muse-spark-1.3-contributor-free
[0m
[0m→ [0mRead .
[0m→ [0mRead request.md
[0m→ [0mRead charlie.ics
[0m→ [0mRead alex.ics
[0m→ [0mRead TASK.md
[0m→ [0mRead rooms.ics
[0m→ [0mRead blair.ics
[0m→ [0mRead dana.ics
[0m
[0m$ [0mpython3 -c "
from datetime import datetime, timedelta
from zoneinfo import ZoneInfo
LA = ZoneInfo('America/Los_Angeles')
NY = ZoneInfo('America/New_York')
LDN = ZoneInfo('Europe/London')
# working hours 8-16 LA equivalent already, but verify via zones
# Busy in LA terms: list (day, start_LA, end_LA)
# We'll generate datetime objects for Sept 8,9,10
import itertools
def la(d,h,m):
return datetime(2026,9,d,h,m,tzinfo=LA)
busy_all = {
'alex': [ (la(8,10,30), la(8,11,30)), (la(8,13,0), la(8,14,0)), (la(9,10,0), la(9,11,0)), (la(10,9,30), la(10,10,30)) ],
'blair': [ (la(8,11,0), la(8,12,0)), (la(9,9,0), la(9,10,0)), (la(10,13,0), la(10,14,0)) ],
'charlie': [ (la(8,10,30), la(8,11,30)), (la(9,9,0), la(9,10,0)), (la(10,10,0), la(10,11,0)) ],
'dana': [ (la(8,12,0), la(8,13,0)), (la(9,12,0), la(9,13,0)), (la(10,12,0), la(10,13,0)), (la(8,10,30), la(8,11,15)) ],
}
rooms = {
'Cedar': [ (la(8,10,30), la(8,12,0)), (la(9,13,0), la(9,15,0)) ],
'Maple': [ (la(8,8,0), la(8,9,30)), (la(10,9,0), la(10,11,0)) ],
}
def ok_slot(start, end, persons, room=None):
# working hours: 8-16 LA each day
# check same day and within
if not (start.date()==end.date()):
return False
day_start = la(start.day,8,0)
day_end = la(start.day,16,0)
if start < day_start or end > day_end:
return False
# quarter hour
if start.minute % 15 != 0 or start.second!=0:
return False
# buffer vs busy
gap = timedelta(minutes=15)
for p in persons:
for (bs,be) in busy_all[p]:
# need 15 clear: meeting [start,end) must not intersect [bs-gap, be+gap)
# Actually condition: start >= be+gap OR end <= bs-gap? With strict? 'at least 15 clear minutes' => distance >=15. So overlap if start < be+gap and end > bs-gap
if start < be+gap and end > bs-gap:
return False
if room:
for (bs,be) in rooms[room]:
if start < be+gap and end > bs-gap:
return False
return True
# search all-hands 90 min slots
for d in [8,9,10]:
for h in range(8,16):
for m in [0,15,30,45]:
s=la(d,h,m)
e=s+timedelta(minutes=90)
if e.day!=d: continue
for r in ['Cedar','Maple']:
if ok_slot(s,e,['alex','blair','charlie','dana'],r):
print(f'ALL {d} {s.strftime(\"%H:%M\")}-{e.strftime(\"%H:%M\")} {r}')
print('---')
print('=== 1:1 Alex-Blair 30 ===')
for d in [8,9,10]:
for h in range(8,16):
for m in [0,15,30,45]:
s=la(d,h,m)
e=s+timedelta(minutes=30)
if e.day!=d: continue
if ok_slot(s,e,['alex','blair']):
print(f'AB {d} {s.strftime(\"%H:%M\")}-{e.strftime(\"%H:%M\")}')
print('---')
print('=== 1:1 Alex-Charlie 30 ===')
for d in [8,9,10]:
for h in range(8,16):
for m in [0,15,30,45]:
s=la(d,h,m)
e=s+timedelta(minutes=30)
if e.day!=d: continue
if ok_slot(s,e,['alex','charlie']):
print(f'AC {d} {s.strftime(\"%H:%M\")}-{e.strftime(\"%H:%M\")}')
print('---')
"
ALL 8 08:00-09:30 Cedar
ALL 8 08:15-09:45 Cedar
ALL 8 08:30-10:00 Cedar
ALL 8 08:45-10:15 Cedar
ALL 8 14:15-15:45 Cedar
ALL 8 14:15-15:45 Maple
ALL 8 14:30-16:00 Cedar
ALL 8 14:30-16:00 Maple
---
ALL 9 13:15-14:45 Maple
ALL 9 13:30-15:00 Maple
ALL 9 13:45-15:15 Maple
ALL 9 14:00-15:30 Maple
ALL 9 14:15-15:45 Maple
ALL 9 14:30-16:00 Maple
---
ALL 10 14:15-15:45 Cedar
ALL 10 14:15-15:45 Maple
ALL 10 14:30-16:00 Cedar
ALL 10 14:30-16:00 Maple
---
=== 1:1 Alex-Blair 30 ===
AB 8 08:00-08:30
AB 8 08:15-08:45
AB 8 08:30-09:00
AB 8 08:45-09:15
AB 8 09:00-09:30
AB 8 09:15-09:45
AB 8 09:30-10:00
AB 8 09:45-10:15
AB 8 12:15-12:45
AB 8 14:15-14:45
AB 8 14:30-15:00
AB 8 14:45-15:15
AB 8 15:00-15:30
AB 8 15:15-15:45
AB 8 15:30-16:00
---
AB 9 08:00-08:30
AB 9 08:15-08:45
AB 9 11:15-11:45
AB 9 11:30-12:00
AB 9 11:45-12:15
AB 9 12:00-12:30
AB 9 12:15-12:45
AB 9 12:30-13:00
AB 9 12:45-13:15
AB 9 13:00-13:30
AB 9 13:15-13:45
AB 9 13:30-14:00
AB 9 13:45-14:15
AB 9 14:00-14:30
AB 9 14:15-14:45
AB 9 14:30-15:00
AB 9 14:45-15:15
AB 9 15:00-15:30
AB 9 15:15-15:45
AB 9 15:30-16:00
---
AB 10 08:00-08:30
AB 10 08:15-08:45
AB 10 08:30-09:00
AB 10 08:45-09:15
AB 10 10:45-11:15
AB 10 11:00-11:30
AB 10 11:15-11:45
AB 10 11:30-12:00
AB 10 11:45-12:15
AB 10 12:00-12:30
AB 10 12:15-12:45
AB 10 14:15-14:45
AB 10 14:30-15:00
AB 10 14:45-15:15
AB 10 15:00-15:30
AB 10 15:15-15:45
AB 10 15:30-16:00
---
=== 1:1 Alex-Charlie 30 ===
AC 8 08:00-08:30
AC 8 08:15-08:45
AC 8 08:30-09:00
AC 8 08:45-09:15
AC 8 09:00-09:30
AC 8 09:15-09:45
AC 8 09:30-10:00
AC 8 09:45-10:15
AC 8 11:45-12:15
AC 8 12:00-12:30
AC 8 12:15-12:45
AC 8 14:15-14:45
AC 8 14:30-15:00
AC 8 14:45-15:15
AC 8 15:00-15:30
AC 8 15:15-15:45
AC 8 15:30-16:00
---
AC 9 08:00-08:30
AC 9 08:15-08:45
AC 9 11:15-11:45
AC 9 11:30-12:00
AC 9 11:45-12:15
AC 9 12:00-12:30
AC 9 12:15-12:45
AC 9 12:30-13:00
AC 9 12:45-13:15
AC 9 13:00-13:30
AC 9 13:15-13:45
AC 9 13:30-14:00
AC 9 13:45-14:15
AC 9 14:00-14:30
AC 9 14:15-14:45
AC 9 14:30-15:00
AC 9 14:45-15:15
AC 9 15:00-15:30
AC 9 15:15-15:45
AC 9 15:30-16:00
---
AC 10 08:00-08:30
AC 10 08:15-08:45
AC 10 08:30-09:00
AC 10 08:45-09:15
AC 10 11:15-11:45
AC 10 11:30-12:00
AC 10 11:45-12:15
AC 10 12:00-12:30
AC 10 12:15-12:45
AC 10 12:30-13:00
AC 10 12:45-13:15
AC 10 13:00-13:30
AC 10 13:15-13:45
AC 10 13:30-14:00
AC 10 13:45-14:15
AC 10 14:00-14:30
AC 10 14:15-14:45
AC 10 14:30-15:00
AC 10 14:45-15:15
AC 10 15:00-15:30
AC 10 15:15-15:45
AC 10 15:30-16:00
---
[0m
[0m$ [0mpython3 -c "
from datetime import datetime
from zoneinfo import ZoneInfo
LA=ZoneInfo('America/Los_Angeles'); NY=ZoneInfo('America/New_York'); LDN=ZoneInfo('Europe/London')
def p(s): return datetime.fromisoformat(s)
ah_s=p('2026-09-08T08:30:00-07:00'); ah_e=p('2026-09-08T10:00:00-07:00')
ab_s=p('2026-09-08T14:15:00-07:00'); ab_e=p('2026-09-08T14:45:00-07:00')
ac_s=p('2026-09-08T15:00:00-07:00'); ac_e=p('2026-09-08T15:30:00-07:00')
for label,s,e,zone,wh in [
('AH Alex',ah_s,ah_e,LA,(8,16)),('AH Blair',ah_s,ah_e,NY,(11,19)),('AH Charlie',ah_s,ah_e,LDN,(16,24)),('AH Dana',ah_s,ah_e,LA,(8,16)),
('AB Alex',ab_s,ab_e,LA,(8,16)),('AB Blair',ab_s,ab_e,NY,(11,19)),
('AC Alex',ac_s,ac_e,LA,(8,16)),('AC Charlie',ac_s,ac_e,LDN,(16,24)),
]:
ls=s.astimezone(zone); le=e.astimezone(zone)
print(label, ls.strftime('%a %H:%M'),'-',le.strftime('%H:%M %Z'), 'wh_ok=', (ls.hour+ls.minute/60>=wh[0] and (le.hour+le.minute/60)<=wh[1] or (wh[1]==24 and le.day==ls.day)), 'offset',ls.utcoffset())
"
AH Alex Tue 08:30 - 10:00 PDT wh_ok= True offset -1 day, 17:00:00
AH Blair Tue 11:30 - 13:00 EDT wh_ok= True offset -1 day, 20:00:00
AH Charlie Tue 16:30 - 18:00 BST wh_ok= True offset 1:00:00
AH Dana Tue 08:30 - 10:00 PDT wh_ok= True offset -1 day, 17:00:00
AB Alex Tue 14:15 - 14:45 PDT wh_ok= True offset -1 day, 17:00:00
AB Blair Tue 17:15 - 17:45 EDT wh_ok= True offset -1 day, 20:00:00
AC Alex Tue 15:00 - 15:30 PDT wh_ok= True offset -1 day, 17:00:00
AC Charlie Tue 23:00 - 23:30 BST wh_ok= True offset 1:00:00
[0m
[0m← [0mWrite schedule.json
Wrote file successfully.
[0m
[0m$ [0mcat schedule.json && python3 -c "import json; d=json.load(open('schedule.json')); print('ok', d.keys())"
{"all_hands":{"attendees":["alex","blair","charlie","dana"],"end":"2026-09-08T10:00:00-07:00","room":"Cedar","start":"2026-09-08T08:30:00-07:00"},"one_on_ones":[{"end":"2026-09-08T14:45:00-07:00","start":"2026-09-08T14:15:00-07:00","with":"blair"},{"end":"2026-09-08T15:30:00-07:00","start":"2026-09-08T15:00:00-07:00","with":"charlie"}]}
ok dict_keys(['all_hands', 'one_on_ones'])
[0m
Files produced
schedule.json
{"all_hands":{"attendees":["alex","blair","charlie","dana"],"end":"2026-09-08T10:00:00-07:00","room":"Cedar","start":"2026-09-08T08:30:00-07:00"},"one_on_ones":[{"end":"2026-09-08T14:45:00-07:00","start":"2026-09-08T14:15:00-07:00","with":"blair"},{"end":"2026-09-08T15:30:00-07:00","start":"2026-09-08T15:00:00-07:00","with":"charlie"}]}
Checker
{"passed": true, "score": 1.0, "notes": "all schedule constraints passed"}
Judge
Not used for this task.