v0.8.3 Maintenance Release

This maintenance release adds an experimental opt-in browser-backed transport for NotebookLM auth replay failures reported in issue #248.

Added

• Added NOTEBOOKLM_RPC_TRANSPORT=cdp to route normal batchexecute RPCs through an in-page fetch inside the saved NotebookLM browser profile.
• Added CDP transport support for notebook chat via GenerateFreeFormStreamed, including longer CDP response waits for long answers.
• Added focused tests for CDP transport routing, streamed query routing, long CDP timeouts, and cleanup of browser instances launched by the client.
• Documented when and how to use the experimental transport.

Changed

• Reused the new CDP fetch helper inside nlm doctor auth-replay, so the diagnostic path matches the real experimental transport more closely.
• Kept the default httpx transport unchanged. The CDP path is off by default.

Notes

Use nlm doctor auth-replay first. Only try NOTEBOOKLM_RPC_TRANSPORT=cdp when normal replay fails but cdp_in_page passes. Uploads, downloads, and artifact file transfers still use the existing HTTP paths.

Verification

• uv run ruff check .
• uv run ruff format --check .
• uv run --dev --with pytest-github-actions-annotate-failures --with pytest-asyncio pytest -v --tb=short -m "not e2e"
• uv run pytest -q
• uv cache clean && uv tool install --force .
• Live smoke test:
• nlm login --check
• nlm notebook list --title
• nlm doctor auth-replay --timeout 20
• NOTEBOOKLM_RPC_TRANSPORT=cdp nlm notebook list --title
• NOTEBOOKLM_RPC_TRANSPORT=cdp nlm query notebook <notebook-id> "Answer in one short sentence: what is this notebook about?" --json
• MCP stdio notebook_list with NOTEBOOKLM_RPC_TRANSPORT=cdp