Vol. XXV · No. 04 A personal publication · Est. 2004
By Rangaprabhu Parthasarathy
A journal of product, AI, and the craft of building things people love.
· Bay Area, California · Advising open
AI · Essay — May 31, 2026

Getting the most out of your second brain

Your Second Brain can be incredibly powerful, with the right optimizations and safeguards in place. Some learnings from the past few months of building and evolving my second brain at work.

Continue reading —
Two Lives · A parallel practice
I. The Product Life

Building things people love.

Twenty‑five years of consumer products at Amazon and Meta. Currently Director of Product, AI Wearables. Writing essays here on what I've learned about craft, teams, and the future of interfaces.

  • Now Director of Product, Meta · AI Wearables
  • Recent Llama 3.2 & Llama 4 at GenAI / MSL
  • Shipped Echo Dot, Echo, Kindle, Oculus Quest 1 & 2
Learn more —
II. The Craft Life

Carnatic music, my lifeline.

A lifelong student and avid listener of Carnatic vocal music. The 72 Melakarta — parent ragas of the Carnatic system — is the scaffold I return to when I'm lost. I built a small app using different AI models to explore them.

I II III IV V VI VII VIII IX X XI XII chakra 72 MELAKARTA
Currently studying
Raga Todi — No. 8, Chakra II
Open the Melakarta app —