Field manualPrinciple
Manual chapter03 / 6
Turn lessons into controls
Move repeated correctness work out of human memory and into gates with proven failure paths.
A convention asks for care. A control makes the unsafe path observable or impossible.
01 · Production stories
See the failure before the pattern
I built a check, and the first thing it caught was me
How a remembered engineering convention became a build gate with a failure path that could be proved.
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The most expensive tester in my company is me
A field note on turning repeated manual catches into automated controls and returning human attention to judgment.
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02 · Put it to work
Copy the control, then adapt it
03 · Proof
What this pattern is grounded in
Proof items describe real findings or working controls. Sanitized and reconstructed examples say so explicitly. They are evidence for the lesson, not universal guarantees.