agent build

go-api/internal/gateway/routing.go

@@ -0,0 +1,33 @@
+package gateway
+
+import (
+	"github.com/anthropics/anthropic-sdk-go"
+
+	"github.com/krow/krow-backend/go-api/internal/config"
+)
+
+// FromConfig builds the gateway's routing table from validated settings.
+//
+// The effort per tier is fixed here rather than configured, and that is the
+// point of the function existing at all: a deployment chooses *which model*
+// answers a tier, and the platform chooses *how hard it thinks*. If a
+// deployment could redefine effort, two installations running the same
+// definition would disagree about what "deep" means while both reporting the
+// tier as deep — and the tier is written into every trajectory.
+//
+//	fast     → low     a lookup, a restatement, a short structured reading
+//	balanced → high    the default, and what most turns should cost
+//	deep     → xhigh   a turn worth several tool calls and real deliberation
+//
+// `max` is deliberately not reachable from a spec. It is the setting for when
+// correctness matters more than cost, which is a judgement an operator makes
+// about a deployment, not one an agent author makes about a page.
+func FromConfig(c config.ModelConfig) Config {
+	return Config{
+		APIKey:          c.APIKey,
+		Fast:            Routing{Model: c.Fast, Effort: anthropic.OutputConfigEffortLow},
+		Balanced:        Routing{Model: c.Balanced, Effort: anthropic.OutputConfigEffortHigh},
+		Deep:            Routing{Model: c.Deep, Effort: anthropic.OutputConfigEffortXhigh},
+		MaxOutputTokens: int64(c.MaxOutputTokens),
+	}
+}