A metric without a decision is only a number
Before measuring, define which result would change priorities. Otherwise the report becomes a tidy set of charts without a next move.
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A small note prevents a large assumption.
These entries are not tutorials. They preserve a constraint or question that can easily disappear between a meeting, code and production.
A dependency receives a boundary
An external service needs a timeout, expected errors and behaviour when unavailable. Without a boundary, its failure becomes the whole interface failure.
Privacy begins in the log
Useful diagnosis does not require a copy of every input. Record an identifier, stage and safe context with a known retention period.
A screenshot does not prove a flow
An image can show layout, but not keyboard use, validation, network failure or the state after a repeated request. A flow is verified by action.
Documentation preserves the reason
Code shows what the system does now. A short decision record explains why that option was chosen and when it will no longer be enough.