The Discipline of Deleting Code
The code you delete never breaks, never gets a CVE, and never confuses the next reader. Subtraction is the most underrated engineering skill we have.
Prosyon · Engineering journal
Field Notes
Engineering observations from real systems.
Field Notes publishes what engineers at Prosyon learn from building and operating real systems. Each note captures a specific decision, trade-off, or pattern — written while the work is fresh.
Latest observations
All notes →Reading the Sky: Observability as Wayfinding
You don’t navigate by staring at the ground. Observability is how a system tells you where you are before you’re already lost.
Notes on Zero-Cost-When-Idle
Architecture that costs nothing at rest isn’t just frugal — it’s a forcing function that quietly makes the whole system simpler and more honest.
The Shape of a Good Interface
A good interface is small on the outside and honest about what it can’t do. Most of the cost of software is paid at its seams.
Navigating by Invariants
An invariant is a promise the system keeps no matter what. Pick a few good ones and most of your design decisions stop being decisions.