Unverified50% confidenceFactExact time
decision_router maintains for each provider a model ladder sorted by capability/cost, and the router can only move one rung along the ladder per round (up, down, or stay in place), and cannot jump to an arbitrary model.
1
Sources
50%
Confidence
Long-term
Relevance
10/15/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedRouter has two typical implementation paths: rule-based heuristics (routing by instruction length, keywords or regular expression matching, with zero latency, zero additional cost and predictable behavior) and model-assisted routing (using a lightweight model to classify intent and then select the downstream model, with higher accuracy but introducing an extra call).70% similarUnverifiedWhen the routing results for a certain type of request are highly concentrated, the routing layer can be removed and the model bound directly to reduce latency and scheduling costs; if routing results remain consistently dispersed, the router's dynamic decision-making should be retained.69% similarUnverifiedHarness Router's PreToolUse decision logic is: pass through directly if the selection is the same, trigger replanning if a better alternative exists, and adopt a fail-open policy without blocking execution if the router itself fails.68% similarUnverifiedThe decide function is essentially a decision ladder, also called a priority rule or guard chain, and only falls through to the default "continue" when all stop conditions are unsatisfied.62% similarUnverifiedRouting decisions should be completed in advance of request arrival or through asynchronous mechanisms, rather than being computed on the fly with each inference request, in order to streamline the hot path and reduce end-to-end latency.61% similar
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