dsh-quota-router

When you have several model sources at play—free tier, subscription, pay-per-use, manual emergency—a keyword-and-fallback router cannot express what you actually need: the same primary route but with per-turn identity preserved during recovery, instant advancement on stable quota or auth failures, and bounded retries for transient errors. dsh-quota-router splits routing into two orthogonal axes: a global source priority list and a per-task modelBySource mapping. At runtime it retains the task profile and candidate identity across turns and walks the exact chain, rather than re-inferring per session. The safety model is explicit: manual and emergency candidates are never auto-selected, paid candidates require an allowPaidFallback opt-in, stable failures advance immediately, and transient failures respect a configurable retry threshold before cooldown kicks in. Context compaction, session-history rewriting, planning, and cross-Harness orchestration are deliberately out of scope.

It is built for developers who already maintain a clear source list and task taxonomy in DSH and need a policy-transparent, explainable, fault-tolerant routing layer that can be edited directly from the Settings page—global priority, task keywords, model mappings, and a live chain preview—instead of another pile of if-else logic.