 Leandro Barbosa
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6e7149509a
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feat: add model fallback chain with error classification
Add 2-layer fallback system (text + image) with automatic candidate
resolution. Includes error classifier (~40 patterns), per-provider
cooldown (exponential backoff), and model reference parsing.
- FailoverError/FailoverReason types for structured error handling
- ErrorClassifier with rate_limit, billing, auth, timeout patterns
- FallbackChain with cooldown management and candidate rotation
- ModelRef parser for provider/model string format
- 128 tests, 95%+ coverage
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2026-02-13 12:12:12 -03:00 |
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