Thinking: gate xhigh by model

src/cron/isolated-agent.ts

@@ -31,7 +31,11 @@ import {
   DEFAULT_HEARTBEAT_ACK_MAX_CHARS,
   stripHeartbeatToken,
 } from "../auto-reply/heartbeat.js";
-import { normalizeThinkLevel } from "../auto-reply/thinking.js";
+import {
+  formatXHighModelHint,
+  normalizeThinkLevel,
+  supportsXHighThinking,
+} from "../auto-reply/thinking.js";
 import type { CliDeps } from "../cli/deps.js";
 import type { ClawdbotConfig } from "../config/config.js";
 import {
@@ -366,6 +370,11 @@ export async function runCronIsolatedAgentTurn(params: {
       catalog: await loadCatalog(),
     });
   }
+  if (thinkLevel === "xhigh" && !supportsXHighThinking(provider, model)) {
+    throw new Error(
+      `Thinking level "xhigh" is only supported for ${formatXHighModelHint()}.`,
+    );
+  }
 
   const timeoutMs = resolveAgentTimeoutMs({
     cfg: cfgWithAgentDefaults,