wip: first run of implementation

tests/engine/agentic/workflow/checkpointStore.test.ts

@@ -0,0 +1,39 @@
+import { describe, expect, it } from 'vitest';
+import {
+  WorkflowCheckpointStore,
+  type WorkflowCheckpointSettingsAdapter,
+} from '../../../../src/main/agentic/workflow/checkpointStore';
+
+class InMemorySettingsAdapter implements WorkflowCheckpointSettingsAdapter {
+  private readonly store = new Map<string, string>();
+
+  async getSetting(key: string): Promise<string | null> {
+    return this.store.get(key) ?? null;
+  }
+
+  async setSetting(key: string, value: string): Promise<void> {
+    this.store.set(key, value);
+  }
+}
+
+describe('WorkflowCheckpointStore', () => {
+  it('persists and reloads workflow checkpoints by conversation id', async () => {
+    const adapter = new InMemorySettingsAdapter();
+    const store = new WorkflowCheckpointStore(adapter);
+
+    await store.save({
+      conversationId: 'conversation-1',
+      state: 'awaiting_input',
+      pendingFields: ['date'],
+      lastTraceId: 'trace-1',
+      updatedAt: new Date('2026-02-25T10:00:00.000Z').toISOString(),
+    });
+
+    const loaded = await store.load('conversation-1');
+
+    expect(loaded).not.toBeNull();
+    expect(loaded?.state).toBe('awaiting_input');
+    expect(loaded?.pendingFields).toEqual(['date']);
+    expect(loaded?.lastTraceId).toBe('trace-1');
+  });
+});