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The Playbook's 2026 Beach Reads
Time flies when you’re on the beach.
Jul 29
•
Alvaro Duran
Forget Agents: Here's What's Great About x402
The best innovations often have a positioning problem in the beginning.
Jul 22
•
Alvaro Duran
1
Why You Can Have Too Much Idempotency In Ledgers
The word “same” carries a lot of weight in a ledger.
Jul 15
•
Alvaro Duran
1
Losing The Fear of SQL
Why ORMs are an obstacle, and what to replace them with
Jul 8
•
Alvaro Duran
2
A Ledger is 3 Products in 1
Finding out where the real cause of your ledger's "bugs" really is
Jul 1
•
Alvaro Duran
2
June 2026
Don't Be Careful, Be Competent
On the fallacy of "writing code is low level thinking", the ability to get things done, and the Faustian bargain of vibe coding.
Jun 24
•
Alvaro Duran
1
1
The Missing State In Your State Machine
The situation in which an item is acknowledged but not yet stored is a perennial problem in state machines
Jun 17
•
Alvaro Duran
3
3
How to Recover The Flexibility of Paper In Ledgers
What paper-based ledgers got right about flexibility that got lost when we moved everything to computers
Jun 10
•
Alvaro Duran
3
4
In An Agentic Commerce World, Fraud Will Be Indistinguishable From Legit
Why purchasing intent is the last irreducibly human part of any transaction, and what 16th century England can teach us about what's next.
Jun 3
•
Alvaro Duran
2
3
1
May 2026
Virtual Bank Accounts Are Virtually Inexhaustible
Why are we using unstructured text when a strict alphanumeric ID can do the job better?
May 27
•
Alvaro Duran
2
2
No Such Thing As A Currency Of Reference
If nobody traded on the exchange rate you wrote down, is it really a record?
May 20
•
Alvaro Duran
3
Source-Destination Pairs Need Imaginary Accounts to Work
Why Debits and Credits are the universal grammar of accounting
May 13
•
Alvaro Duran
5
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