Error rate peaks at 18:00 (9.4%) during evening cron batches vs 4.0%
at 09:00 during interactive work. Route cron tasks to stronger models
during off-hours when user is not present to correct errors.
New agent/time_aware_routing.py:
- resolve_time_aware_model(): routes based on hour, error rate, task type
- Interactive sessions: always use base model (user corrects errors)
- Cron during business hours: use base model (low error rate)
- Cron during off-hours with high error rate (>6%): upgrade to strong model
- get_hour_error_rate(): error rates by hour from empirical audit
- is_off_hours(): 18:00-05:59 = off-hours
- RoutingDecision: model, provider, reason, hour, error_rate
- get_routing_report(): 24h forecast of routing decisions
Config via env vars:
- CRON_STRONG_MODEL (default: xiaomi/mimo-v2-pro)
- CRON_CHEAP_MODEL (default: qwen2.5:7b)
- CRON_ERROR_THRESHOLD (default: 6.0%)
Tests: tests/test_time_aware_routing.py (9 tests)
Closes#889
