Implement saver mode (#154)

src/main/llm_error_store.ts

@@ -0,0 +1,35 @@
+class LlmErrorStore {
+  private modelErrorToTimestamp: Record<string, number> = {};
+
+  constructor() {}
+
+  recordModelError({ model, provider }: { model: string; provider: string }) {
+    this.modelErrorToTimestamp[this.getKey({ model, provider })] = Date.now();
+  }
+
+  clearModelError({ model, provider }: { model: string; provider: string }) {
+    delete this.modelErrorToTimestamp[this.getKey({ model, provider })];
+  }
+
+  modelHasNoRecentError({
+    model,
+    provider,
+  }: {
+    model: string;
+    provider: string;
+  }): boolean {
+    const key = this.getKey({ model, provider });
+    const timestamp = this.modelErrorToTimestamp[key];
+    if (!timestamp) {
+      return true;
+    }
+    const oneHourAgo = Date.now() - 1000 * 60 * 60;
+    return timestamp < oneHourAgo;
+  }
+
+  private getKey({ model, provider }: { model: string; provider: string }) {
+    return `${provider}::${model}`;
+  }
+}
+
+export const llmErrorStore = new LlmErrorStore();