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---
name: code-quality
description: Keep code clear, local, and purposeful while changing existing systems.
---
# Code quality
Write code that is easy to inspect and hard to misuse.
## Local fit
Match naming, structure, and error-handling style already used nearby. A change should look like it
belongs in the module that owns it.
## Purposeful units
Keep functions and modules small enough to understand, but do not split code just to create layers.
Each helper should name a useful idea or remove meaningful repetition.
## Noise
Delete dead code. Avoid speculative options, unused parameters, and exports nobody needs. Comments
should explain why a choice exists, not restate what the code says.
## Errors
Handle errors where useful context exists. Preserve the original cause when it helps debugging, and
return or throw errors with messages a caller can act on.
