smart-model-routing

# Smart Model Routing Dynamic model selection based on task complexity. Never use a sledgehammer where a scalpel will do — and never use a scalpel where you need a sledgehammer. ## Core Philosophy Static model assignments ("always use Sonnet for code") waste money on trivial tasks and produce poor results on complex ones. This skill scores every task across three signal categories and routes it to the appropriate model tier automatically. **Default rule: inherit parent model.** Only override when the score clearly warrants a different tier. Never specify a model without a scoring reason. --- ## Signal Categories Three weighted categories are evaluated. Their scores combine into a single complexity score (0-20 typical range, can exceed). ### Category 1: Lexical Signals (weight: 0.3) Analyze the raw text of the request. #### Architecture Keywords (+3 each) Trigger words that indicate high-stakes design work: - "redesign", "overhaul", "new system", "migrate", "refactor entire", "rewrite" - "architecture", "from scratch", "greenfield", "new service", "platform" Example: "Redesign the authentication system" → +3 #### Risk Keywords (+2 each) Domains where mistakes are expensive or irreversible: - "production", "security", "auth", "authentication", "authorization" - "payment", "billing", "database migration", "data loss", "rollback" - "GDPR", "compliance", "PII", "encryption", "secrets", "credentials" Example: "Update the payment processing logic" → +2 #### Simple Keyw...