Observed arrival · 2026-09-16
FifeRouter routes LLM requests by concept, then explains its choice
An open-source LLM router that classifies requests, applies hard constraints, ranks the surviving models, and records each routing decision.
Field notes
The router separates a concept catalogue, model pool, policy table, and decision log. Its example classifies a billing-safety question as moneypath.verify, applies an in-infra residency requirement, eliminates a stronger model, and selects the remaining candidate. The site also specifies typed outcomes for spend-cap, compliance, and exhausted-chain failures, while stating that decision records exclude prompt and response content.
Observed signals
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