Who is brownlittlefish?

It's me, Harshvardhan Pandey. brownlittlefish is the handle I go by just about everywhere online. Harsh works too.

Build tools for AI agents that ask before anything matters. Handover tests agent handoffs. Free, open source, zero dependencies.

Consumer AI and human-led agent tools: agents that show their plan, ask before anything consequential, and stay checkable against a source instead of running on faith.

Where can I find your work?

Open source on GitHub, writing on Substack and Medium, photography on Instagram, cycling and FPV video on YouTube. All under @brownlittlefish or geekidharsh on GitHub.

Start at the About section above. Or just say hello on any of the platforms listed.

Harshvardhan Pandeybrownlittlefish

Consumer AI & human-led agent tools.

As a kid, I took things apart to see how they worked. I never really stopped.

I'm an engineer in the San Francisco Bay Area. I spent a decade in data infrastructure: warehousing, pipelines, real-time systems. Genomics and single-cell data in pharma, then ad-tech and finance. Usually the one arguing for the boring solution.

Now I build my own things, mostly around one question: how do regular people get good information when the other side knows more than they do?

Away from code I ride, shoot landscapes, and write, mostly as @brownlittlefish.

Building

HandoverA human-led agent tool: it makes AI agent handoffs ask to be verified instead of trusted. A linter checks the handoff against the live repo, and a trap-based benchmark measures whether it actually transferred. Apache-2.0, ships as a Claude Code plugin.

Earlier writing & code

@brownlittlefish on Medium·@brownlittlefish on Substack

Writing

All writing·@brownlittlefish on Substack

Photography

Mostly street and travel, whatever catches my eye when I'm out.

800,000+ views on Google Maps, as of August 2026.

@brownlittlefish on Instagram·@brownlittlefish on YouTube

Cycling

Cycling and FPV video, what the ride looks like from the saddle.

@brownlittlefish on YouTube

Questions

Who is brownlittlefish?: It's me, Harshvardhan Pandey. brownlittlefish is the handle I go by just about everywhere online. Harsh works too.
What do you do?: Build tools for AI agents that ask before anything matters. Handover tests agent handoffs. Free, open source, zero dependencies.
What's the focus?: Consumer AI and human-led agent tools: agents that show their plan, ask before anything consequential, and stay checkable against a source instead of running on faith.
Where can I find your work?: Open source on GitHub, writing on Substack and Medium, photography on Instagram, cycling and FPV video on YouTube. All under @brownlittlefish or geekidharsh on GitHub.
How can I reach you?: Start at the About section above. Or just say hello on any of the platforms listed.

Contact

I like a good conversation. Email's the best way to start one.

hi@brownlittlefish.com