# Phase 91 Summary

Status: implemented on `main`

## Goal

Lock the checked-in runtime compatibility surface to repo-relative current-topic
paths and prevent future workstation-path leakage.

## What Landed

- new contract test:
  `research/knowledge-hub/tests/test_runtime_path_hygiene_contracts.py`
- cleaned checked-in fixtures:
  `research/knowledge-hub/runtime/current_topic.json|md`

## Outcome

Phase `91` is complete.
`v1.53` is active on a runtime path contract baseline.
