chore: update deps and pi model discovery

src/agents/pi-model-discovery.ts

@@ -0,0 +1,14 @@
+import path from "node:path";
+
+import { AuthStorage, ModelRegistry } from "@mariozechner/pi-coding-agent";
+
+// Compatibility helpers for pi-coding-agent 0.50+ (discover* helpers removed).
+export function discoverAuthStorage(agentDir: string): AuthStorage {
+  return new AuthStorage(path.join(agentDir, "auth.json"));
+}
+
+export function discoverModels(authStorage: AuthStorage, agentDir: string): ModelRegistry {
+  return new ModelRegistry(authStorage, path.join(agentDir, "models.json"));
+}
+
+export type { AuthStorage, ModelRegistry };