Add NotebookLM write capabilities (create notebook, add source, write note, generate audio/PPT)

[Fengsh0923]

Feature Request: NotebookLM Write Capabilities

Current State

The existing notebooklm adapter is read-only — it can list, open, and read notebooks/sources/notes/summaries, but cannot create or modify anything.

Requested Commands

# Create
opencli notebooklm create "My New Notebook"

# Sources
opencli notebooklm source-add --url "https://..." or --file "path/to/file.pdf" or --text "paste content"

# Notes (Studio panel)
opencli notebooklm note-add --title "Key Insight" --text "The main takeaway is..."

# Audio Overview (the popular podcast-style feature)
opencli notebooklm generate-audio

# PPT/Slideshow (the newer feature)
opencli notebooklm generate-slides

Technical Notes

• NotebookLM's web UI uses batchexecute RPCs for all operations — the existing list command already reverse-engineers this protocol
• Write operations (create notebook, add source, save note) go through the same RPC channel, just different endpoint IDs
• Audio/slides generation can be triggered via the Studio panel buttons — detectable through DOM interaction or RPC calls
• Auth is already solved (reuses Chrome login session)

Use Cases

1. Knowledge pipeline: AI agent reads articles → auto-creates NotebookLM notebook → adds sources → generates audio overview for listening
2. Research workflow: Search results from other OpenCLI adapters (arxiv, substack, google) → automatically fed into a new notebook
3. Team knowledge sharing: Generate audio overviews from collected sources for team consumption

Related

• Existing notebooklm adapter (read-only: list, open, get, source-list, source-get, source-fulltext, note-list, notes-get, summary, history)

[Astro-Han]

Current notebooklm support in the repo is read-only, which matches the documented command set. I did not find another active issue or PR for this write-side expansion, so this looks separate from the existing work.