fix(model): retry with supported thinking level

src/agents/pi-embedded-helpers.ts

@@ -6,6 +6,7 @@ import type {
   AgentToolResult,
 } from "@mariozechner/pi-agent-core";
 import type { AssistantMessage } from "@mariozechner/pi-ai";
+import { normalizeThinkLevel, type ThinkLevel } from "../auto-reply/thinking.js";
 
 import { sanitizeContentBlocksImages } from "./tool-images.js";
 import type { WorkspaceBootstrapFile } from "./workspace.js";
@@ -118,3 +119,38 @@ export function isRateLimitAssistantError(
   if (!raw) return false;
   return /rate[_ ]limit|too many requests|429/.test(raw);
 }
+
+function extractSupportedValues(raw: string): string[] {
+  const match =
+    raw.match(/supported values are:\s*([^\n.]+)/i) ??
+    raw.match(/supported values:\s*([^\n.]+)/i);
+  if (!match?.[1]) return [];
+  const fragment = match[1];
+  const quoted = Array.from(fragment.matchAll(/['"]([^'"]+)['"]/g)).map(
+    (entry) => entry[1]?.trim(),
+  );
+  if (quoted.length > 0) {
+    return quoted.filter((entry): entry is string => Boolean(entry));
+  }
+  return fragment
+    .split(/,|\band\b/gi)
+    .map((entry) => entry.replace(/^[^a-zA-Z]+|[^a-zA-Z]+$/g, "").trim())
+    .filter(Boolean);
+}
+
+export function pickFallbackThinkingLevel(params: {
+  message?: string;
+  attempted: Set<ThinkLevel>;
+}): ThinkLevel | undefined {
+  const raw = params.message?.trim();
+  if (!raw) return undefined;
+  const supported = extractSupportedValues(raw);
+  if (supported.length === 0) return undefined;
+  for (const entry of supported) {
+    const normalized = normalizeThinkLevel(entry);
+    if (!normalized) continue;
+    if (params.attempted.has(normalized)) continue;
+    return normalized;
+  }
+  return undefined;
+}