# Bug: <Short title — what breaks>

## Symptoms
<!-- What observable behaviour is wrong? -->
- 
- 

## Reproduction steps
<!-- Minimal steps to trigger the bug -->
1. 
2. 
3. 

## Expected behaviour
<!-- What should happen -->

## Actual behaviour
<!-- What actually happens -->

## Affected scope
<!-- Files, modules, or areas you suspect are involved -->
- 

## Constraints
<!-- What must NOT change while fixing this -->
- All existing tests must stay green
- 

## Regression test required
Yes

## Environment
<!-- Optional: OS, language version, relevant config -->
Python: 
OS: 
