A professional ledger for judgment
Distill wisdom into rules. Organise them into books. Build a library of judgment you can trust, share, and refine.
How it works
01
Distill
Capture a piece of wisdom as a 120-character rule. Add context, nuance, and evidence.
02
Organise
Group rules into books. Build your personal library of professional judgment.
03
Share
Publish rules publicly. Others can adopt them as-is or tailor them to their context.
Example rules
From the project's own technical constitution
“Optimise for deletion”
The measure of a good architecture is not how much it does, but how easily it can be removed.
Dan Abramov · The Engineering Standard
“Duplication is cheaper than wrong abstraction”
Hasty abstractions create tight coupling. It is better to copy code three times than to create a premature abstraction.
Sandi Metz · The Engineering Standard
“Identity is the perimeter”
Never trust a session you didn’t explicitly verify. Use proven identity providers to offload credential risk.
Troy Hunt · The Security Ledger
“Build horizontal slices”
Do not build in vertical layers. Build a thin slice across the whole journey to deliver value immediately.
Luke Brooker · The Minimal Strategy
“Return early”
Guard clauses allow the reader to discard mental baggage as they read down the file.
Martin Fowler · The Engineering Standard
“Decisions are bets”
A decision is a wager on a specific future. Judge the quality of the process, not the result of a single bounce.
Annie Duke · The Risk Ledger