@velum-labs/routekit-gateway

Product-neutral model routing and provider egress for RouteKit.

The package owns the Backend interface, HTTP gateway, OpenAI Chat, Responses, Anthropic Messages and Cursor adapters, SSE handling, ACP support, normalized call provenance, model catalogs, provider sources, and provider-native egress. Canonical router configuration belongs to @velum-labs/routekit-config-core.

At startup RoutingBackend authenticates every explicitly configured provider, performs live model discovery, and publishes source-qualified provider/model IDs. Dispatch removes the source prefix before provider-native egress. An unavailable provider fails startup rather than silently shrinking the catalog.

import {
  RoutingBackend,
  startGateway
} from "@velum-labs/routekit-gateway";
import { parseRouterConfig } from "@velum-labs/routekit-config-core";

API-key providers use registry-defined credentials and URLs. Multi-account subscription providers and relays are in @velum-labs/routekit-accounts; they expose the same source interface with per-model account eligibility and quota-aware selection. RouteKit hosts wire this package into the singleton daemon gateway.

Compositional routing accepts explicit named repository selectors as model: "auto:<name>", or as x-routekit-routing-profile: <name> with model: "auto". The host supplies trusted repository context (the singleton uses its repository-bound launcher credential); request headers never select a filesystem root. The gateway rejects malformed, unbound, and conflicting selectors before routing.