## Summary

(1-3 sentences — what changed and why)

## Type

- [ ] Bug fix
- [ ] New feature
- [ ] Documentation
- [ ] Refactoring (no behavior change)
- [ ] Test improvement
- [ ] CI / build

## Personas affected

- [ ] Researcher
- [ ] Humanities
- [ ] Analyst
- [ ] Internal KM
- [ ] All / persona-agnostic

## Test plan

- [ ] `pytest -q` passes locally
- [ ] Added test(s) for new behavior
- [ ] Manually verified on my own vault (if applicable)
- [ ] CI green on all 3 OS matrix jobs

## Breaking changes

- [ ] None
- [ ] Yes — documented in `UPGRADE.md`

## Related issues

Closes #(number)

## Notes for reviewer

(Anything non-obvious about the design / trade-offs)
