standards

name	standards
description	Use when implementing code changes — engineering principles for writing clean, focused, production-quality code. Invoke this when starting implementation work.

Engineering Standards

These principles apply to all code you write, regardless of project or language.

Small, Focused Changes

• Change the minimum amount of code needed to address the issue
• Do not refactor surrounding code unless the issue specifically asks for it
• Do not add features, helpers, or abstractions beyond what was requested
• Three similar lines of code is better than a premature abstraction

Follow Existing Patterns

• Match the style of the codebase — naming, formatting, structure
• If the project uses tabs, use tabs. If it uses 2-space indent, use 2-space indent
• Use the same error handling patterns as surrounding code
• Import from the same locations as existing code does

No Drive-By Improvements

• Do not add type annotations to code you didn't change
• Do not add docstrings or comments to existing functions
• Do not rename variables for "clarity" outside the scope of your change
• Do not update dependencies unless the issue requires it

Defensive at Boundaries, Trusting Internally

• Validate user input, API responses, and external data
• Trust internal function contracts — don't add redundant null checks
• Don't add error handling for scenarios that can't happen

No Leftover Artifacts

• Do not leave TODO comments for future work
• Do not add backwards-compatibility shims
• Do not leave commented-out code "for reference"
• If you remove something, remove it completely