Bug report: flashcard.create() generates a QUIZ artifact / flashcards data extraction returns 0

[OnixcodeAB]

Bug report: flashcard.create() generates a QUIZ artifact / flashcards data extraction returns 0

Summary

Calling sdk.artifacts.flashcard.create() successfully creates an artifact and reaches READY, but the resulting artifact appears to be a Quiz (HTML title "Quiz" and artifact title like "Linear Regression Quiz") rather than Flashcards. As a result, fetchFlashcardData() fails to find any flashcards array and returns 0 cards.

Environment

• notebooklm-kit: 2.2.0 (from source)
• Node: 24.13.0 (Windows)
• Auth: NOTEBOOKLM_AUTH_TOKEN + NOTEBOOKLM_COOKIES

Reproduction

Notebook ID used: 335444d2-7efd-40f5-8f14-9a1911944e64

import { NotebookLMClient, ArtifactState } from "notebooklm-kit";

const sdk = new NotebookLMClient({ autoRefresh: false });
await sdk.connect();

const artifact = await sdk.artifacts.flashcard.create("335444d2-7efd-40f5-8f14-9a1911944e64", {
  title: "Flashcards test",
  instructions: "Create short Q/A flashcards",
  customization: { numberOfCards: 2, difficulty: 2, language: "en" },
});

// Poll until READY
let current: any = artifact;
while (current.state !== ArtifactState.READY) {
  await new Promise(r => setTimeout(r, 3000));
  current = await sdk.artifacts.get(artifact.artifactId, "335444d2-7efd-40f5-8f14-9a1911944e64");
}

const full = await sdk.artifacts.get(artifact.artifactId, "335444d2-7efd-40f5-8f14-9a1911944e64");
console.log(Object.keys(full));
console.log(full.type, full.title);

Artifact created (example): 4b1ff3c0-eeaa-46a3-ad97-4a25de3b594e

Expected

• Artifact type should be FLASHCARDS (6)
• sdk.artifacts.get() (when READY) should return flashcard data (e.g., flashcards[], csv, totalCards), or artifacts.download() should save JSON containing flashcards.

Actual

• Artifact is READY, but sdk.artifacts.get() returns only metadata keys:
  • artifactId, title, type, state, sourceIds
• fetchFlashcardData() fails with: "No valid flashcards found in flashcard response"
• The raw response preview contains HTML titled Quiz and artifact title like "Linear Regression Quiz".

Notes / suspicion

• Mapping for ArtifactType.FLASHCARDS in the R7cb6c creation payload might be using the wrong type code, producing a QUIZ artifact.
• Alternatively, RPC_GET_QUIZ_DATA may return a quiz-shaped payload even for flashcards now (API change), and parser needs update.

Impact

Users cannot programmatically generate flashcards even when the artifact reaches READY.