[management, proxy] Management-owned LLM pricing: file-backed defaults + (#6965)

e2e/harness/config.go

@@ -8,6 +8,13 @@ package harness
 // embedded IdP, local signal/relay/STUN, and a sqlite store under the mounted
 // data dir. exposedAddress is the address peers use to reach this container; it
 // is overridden per-run so the value matches the container's network alias.
+//
+// pricingDefaultsFile is deliberately a BARE FILENAME, not an absolute path: it
+// must resolve against dataDir (→ /nb/data/<name>), which is the resolution rule
+// the combined server applies. It is also an EXPLICITLY configured path, so the
+// server is required to load it — a broken path or malformed file fails startup
+// rather than silently falling back to the compiled-in rates, and TestMain then
+// fails with the container logs.
 const combinedConfigYAML = `server:
   listenAddress: ":8080"
   exposedAddress: "%s"
@@ -23,4 +30,36 @@ const combinedConfigYAML = `server:
     issuer: "%s"
   store:
     engine: "sqlite"
+  agentNetwork:
+    pricingDefaultsFile: "` + PricingDefaultsFileName + `"
+`
+
+const (
+	// PricingDefaultsFileName is the basename of the operator-supplied LLM
+	// pricing defaults file the combined server is configured to load. Written
+	// into the bind-mounted datadir by StartCombined.
+	PricingDefaultsFileName = "e2e_llm_pricing.yaml"
+
+	// PricedDefaultModel is a real catalog model (openai surface) whose rates the
+	// defaults file below REPLACES. Tests drive it against the mock vLLM upstream
+	// and assert the file's rates were billed, which is only true if the file
+	// travelled: config → LoadFile → DefaultTable → synthesizer → the proxy's
+	// cost_meter defaults table.
+	PricedDefaultModel = "gpt-4.1-mini"
+	// PricedDefaultInputPer1k / PricedDefaultOutputPer1k are deliberately odd
+	// values that no compiled-in catalog entry carries (gpt-4.1-mini ships as
+	// 0.0004 / 0.0016), so a test asserting them cannot pass on the built-in
+	// table.
+	PricedDefaultInputPer1k  = 0.0123
+	PricedDefaultOutputPer1k = 0.0456
+)
+
+// pricingDefaultsYAML is the operator-supplied pricing defaults file. Its schema
+// is surface -> model -> per-1k rates. Entries replace the compiled-in entry for
+// the same surface+model whole; every other model keeps its built-in rates, so
+// this file overriding one model must not disturb the rest of the table.
+const pricingDefaultsYAML = `openai:
+  gpt-4.1-mini:
+    input_per_1k: 0.0123
+    output_per_1k: 0.0456
 `