Providers: fix kimi fallback normalization

src/agents/provider-capabilities.test.ts

@@ -148,6 +148,11 @@ describe("resolveProviderCapabilities", () => {
     expect(usesMoonshotThinkingPayloadCompat("openai")).toBe(false);
   });
 
+  it("keeps the normalized kimi fallback aligned when plugin capabilities are unavailable", () => {
+    resolveProviderCapabilitiesWithPluginMock.mockImplementationOnce(() => undefined);
+    expect(usesMoonshotThinkingPayloadCompat("kimi-coding")).toBe(true);
+  });
+
   it("resolves transcript thought-signature and tool-call quirks through the registry", () => {
     expect(
       shouldSanitizeGeminiThoughtSignaturesForModel({

src/agents/provider-capabilities.ts

@@ -67,7 +67,7 @@ const PLUGIN_CAPABILITIES_FALLBACKS: Record<string, Partial<ProviderCapabilities
   moonshot: {
     openAiPayloadNormalizationMode: "moonshot-thinking",
   },
-  "kimi-coding": {
+  kimi: {
     openAiPayloadNormalizationMode: "moonshot-thinking",
   },
   opencode: {