fix(thinking): default Claude 4.6 to adaptive

src/agents/model-selection.test.ts

@@ -503,6 +503,72 @@ describe("model-selection", () => {
         }),
       ).toBe("high");
     });
+
+    it("accepts per-model params.thinking=adaptive", () => {
+      const cfg = {
+        agents: {
+          defaults: {
+            models: {
+              "anthropic/claude-opus-4-6": {
+                params: { thinking: "adaptive" },
+              },
+            },
+          },
+        },
+      } as OpenClawConfig;
+
+      expect(
+        resolveThinkingDefault({
+          cfg,
+          provider: "anthropic",
+          model: "claude-opus-4-6",
+          catalog: [
+            {
+              provider: "anthropic",
+              id: "claude-opus-4-6",
+              name: "Claude Opus 4.6",
+              reasoning: true,
+            },
+          ],
+        }),
+      ).toBe("adaptive");
+    });
+
+    it("defaults Anthropic Claude 4.6 models to adaptive", () => {
+      const cfg = {} as OpenClawConfig;
+
+      expect(
+        resolveThinkingDefault({
+          cfg,
+          provider: "anthropic",
+          model: "claude-opus-4-6",
+          catalog: [
+            {
+              provider: "anthropic",
+              id: "claude-opus-4-6",
+              name: "Claude Opus 4.6",
+              reasoning: true,
+            },
+          ],
+        }),
+      ).toBe("adaptive");
+
+      expect(
+        resolveThinkingDefault({
+          cfg,
+          provider: "amazon-bedrock",
+          model: "us.anthropic.claude-sonnet-4-6-v1:0",
+          catalog: [
+            {
+              provider: "amazon-bedrock",
+              id: "us.anthropic.claude-sonnet-4-6-v1:0",
+              name: "Claude Sonnet 4.6",
+              reasoning: true,
+            },
+          ],
+        }),
+      ).toBe("adaptive");
+    });
   });
 });
 

src/agents/model-selection.ts

@@ -27,6 +27,7 @@ const ANTHROPIC_MODEL_ALIASES: Record<string, string> = {
   "sonnet-4.6": "claude-sonnet-4-6",
   "sonnet-4.5": "claude-sonnet-4-5",
 };
+const CLAUDE_46_MODEL_RE = /claude-(?:opus|sonnet)-4(?:\.|-)6(?:$|[-.])/i;
 
 function normalizeAliasKey(value: string): string {
   return value.trim().toLowerCase();
@@ -525,6 +526,8 @@ export function resolveThinkingDefault(params: {
   model: string;
   catalog?: ModelCatalogEntry[];
 }): ThinkLevel {
+  const normalizedProvider = normalizeProviderId(params.provider);
+  const modelLower = params.model.toLowerCase();
   const perModelThinking =
     params.cfg.agents?.defaults?.models?.[modelKey(params.provider, params.model)]?.params
       ?.thinking;
@@ -534,7 +537,8 @@ export function resolveThinkingDefault(params: {
     perModelThinking === "low" ||
     perModelThinking === "medium" ||
     perModelThinking === "high" ||
-    perModelThinking === "xhigh"
+    perModelThinking === "xhigh" ||
+    perModelThinking === "adaptive"
   ) {
     return perModelThinking;
   }
@@ -542,6 +546,14 @@ export function resolveThinkingDefault(params: {
   if (configured) {
     return configured;
   }
+  const isAnthropicFamilyModel =
+    normalizedProvider === "anthropic" ||
+    normalizedProvider === "amazon-bedrock" ||
+    modelLower.includes("anthropic/") ||
+    modelLower.includes(".anthropic.");
+  if (isAnthropicFamilyModel && CLAUDE_46_MODEL_RE.test(modelLower)) {
+    return "adaptive";
+  }
   const candidate = params.catalog?.find(
     (entry) => entry.provider === params.provider && entry.id === params.model,
   );