Jack Puccini
Good at starting things, working on the finishing part.
AI · Product & zero-to-one · Reasoning & decisions
Recent Writing
- Jul 6, 2026 · 6 min readAI
What Won't Change
Building for the present versus building on invariants - the constraints on the human side of the interface that will still be true in ten years.
- Jun 23, 2026 · 6 min readAI
My Current 'AI Stack' for 'Productivity'
The tools I actually use day to day - dictation, screenshots, coding agents, and a writing pipeline - and an honest take on whether any of it makes me faster.
- Mar 17, 2026 · 4 min readAI
Managing Agents, Not Programming Them
Reflections on designing agent systems by managing intelligent actors rather than prescribing rigid workflows.
- Mar 4, 2025 · 10 min readSoftware
Mutability and Immutability in Python
Understanding mutability and immutability in Python
- Dec 30, 2024 · 3 min readOther
Jane Street Puzzle - December 2024
My solution to Jane's street December puzzle, 'Games Night'
About
I get distracted by how things work. I'm wrong a lot, and mostly just try to be wrong faster than last time.
Everything has structure. Finding it lets you see the same thing through different lenses — a system, a product, a market, a decision — and I try not to respect the borders between them.
Recent Thoughts
Notes to myself, made public.
- Jul 24, 2026
EZ
- Jul 24, 2026
Let's do somethinggggggggg
- Jun 27, 2026
The best long-term bets are not bets on a specific interface or protocol. They are bets on a future bottleneck.