Use Comet to fill a NotebookLM research notebook
Raghav Mehra tested Comet on the slow first step of a NotebookLM project: collecting useful source links.
Original prompt
Shared by the source author. See source notes for context.
Research Task: Add [TOPIC] Sources to NotebookLM
Reach people exploring AI agents
See placements →What happened
Mehra reports that Comet populated the NotebookLM notebook with Reddit discussions and ten extra Discover sources in roughly fifteen minutes without intervention.
Reported by Raghav MehraHow the agent did it
- Define the Reddit research topic.
- Add URLs through NotebookLM Add Source.
- Find related material through Discover.
Where a person stepped in
Mehra reports no intervention during this run.
Raghav Mehra tested Comet on the slow first step of a NotebookLM project: collecting useful source links. His newsletter team wanted to understand complaints about ordinary browsers, so he asked the agent to find relevant Reddit discussions and add them to a notebook.
The instructions covered both NotebookLM intake routes. Comet used Add Source to enter URLs, then used Discover to locate related material and added those results too. The agent returned more Reddit threads than requested and included ten additional sources through Discover. Mehra reports that the run took roughly fifteen minutes and required no intervention.
The source includes an adaptable instruction template naming the research topic, source type, desired count and intended learning goal. Mehra distinguishes this exploratory approach from situations where a researcher already has a carefully chosen set of links. The demonstrated result was a populated notebook, rather than independently verified conclusions about every complaint it contained. This was part of a week spent testing Comet against actual newsletter work.
Prompt
Original prompt
Source: cashandcache.substack.com · Raghav Mehra
Frequently asked questions
What material was collected?
Reddit discussions about browser complaints.
Which intake tools were used?
NotebookLM Add Source and Discover.
Was intervention required here?
Mehra reports no intervention during this run.
More details
About this account
Comet searched and operated the notebook intake tools.
Firsthand account opened and read; outcomes attributed to the author. Prompt is a verbatim excerpt of the shared original, not the complete instruction.
Credit: Raghav Mehra
Source published 28 Oct 2025
Source checked 14 Oct 2026
Tools and topics
Comet · Reddit · NotebookLM
NotebookLM · Reddit · Research intake
Editorial completeness: 100/100. Measures documented fields, not agent performance or verified outcomes.