The newsletter

Tight Margins

On business decision-making under constraints. Published every 1–2 weeks. Join 1,000+ product leaders who read it.

No spam. Unsubscribe anytime. Read on Substack.
Essay
"All Tests Passing."
AI models are graded, not tested. Graders are scarce, so the world does the testing, after the fact, and the check that works best is one…
Oct 2026 · 13 min
Essay
One Working Day
India has given a handful of institutions the job of pricing its private companies, and forbidden them from owning one until the morning …
Oct 2026 · 54 min
Essay
"Would I Hire Them Again?"
An interview can tell who clears the bar and can barely rank the people above it. So, after a thousand hires, how many yesses would you g…
Oct 2026 · 28 min
Essay
"Tell Me More."
As a candidate, how do you read the interview room, and what does it say about the job?
Oct 2026 · 18 min
Essay
"Design a Product for Volunteering."
Asked for six years, reported sixty-five times, answers for sale one hop away. What the public record of product interviews says an inter…
Sep 2026 · 30 min
Essay
Cheap to check
Answers have become cheap and verdicts have not. That decides what AI changes first, in the world and in your own team.
Sep 2026 · 13 min
Essay
The Metric Bought a Year of the Wrong Work
Nobody gamed anything. Nobody stayed silent. One question which was never asked.
Sep 2026 · 17 min
Essay
Match the query exactly
How legibility discount ends up creating hollow victories, if at all
Sep 2026 · 17 min
Essay
Process Cosplay Is Not Strategy
Imitation is necessary and precedes most innovation. Copying without re-deriving is something else, and a competitor who notices can use …
Aug 2026 · 21 min
Essay
For You, It Is
Judgment is not a repository of tools. It is the habit of recognizing which one the situation is asking for.
Aug 2026 · 9 min
Essay
Product Managers: Your Persona Deck Is Not Worldbuilding
A working guide to what actually transfers from worldbuilding
Aug 2026 · 16 min
Essay
Scarcity doesn't pay
Careers were built on becoming singular. That arrangement had a condition nobody wrote down.
Aug 2026 · 24 min
Essay
Zepto Hit a Wall. It Was Not an Operating Wall.
On the distance between reported outcomes and operating reality—and how disclosure can make one company carry a sector’s scrutiny.
Aug 2026 · 34 min
Essay
Nobody Wrote Down What Should Rank Higher
Google has a 182-page document describing what should rank higher. Your team has a metric.
Aug 2026 · 28 min
Essay
Prototype the Risk, Not the Screen
Most prototyping advice assumes a screen. For APIs, data products, ranking systems, platforms and agents, the right prototype is the smal…
Aug 2026 · 20 min
Essay
Safe Operating Speed
Your technology has a top speed. Your organization has a different one. Almost everything that goes wrong in the agentic era lives in the…
Jul 2026 · 11 min
Essay
When Agents Meet Markets That Don’t Forgive
Automation does not just accelerate decisions. It accelerates consequences.
Jul 2026 · 9 min
Essay
When Moving Fast Is Actually Right
The infrastructure that makes "moving fast" actually work
Jul 2026 · 9 min
Essay
Synthetic Competence
The cost of looking competent has collapsed. Organizations have not updated their tests.
Jul 2026 · 7 min
Essay
What Organizations Actually Pay For
Compensation is not a fairness system. It is a pricing system for perceived leverage.
Jul 2026 · 9 min