# Phase 150 Summary

Status: implemented in working tree

## Goal

Close the next post-`v1.75` gap by turning parked-route reactivation and
follow-up return contracts into one operator-visible route re-entry surface.

## What Landed

- route re-entry payload construction and runtime/read-path rendering in:
  - `research/knowledge-hub/knowledge_hub/runtime_read_path_support.py`
- runtime protocol and research-question rendering for the new route re-entry
  section in:
  - `research/knowledge-hub/knowledge_hub/kernel_markdown_renderers.py`
  - `research/knowledge-hub/knowledge_hub/runtime_bundle_support.py`
- replay support for deferred reactivation conditions and follow-up return
  readiness in:
  - `research/knowledge-hub/knowledge_hub/topic_replay.py`
- public runtime-bundle schema coverage for `route_reentry` and
  `route_reentry_item` in:
  - `research/knowledge-hub/runtime/schemas/progressive-disclosure-runtime-bundle.schema.json`
- one new isolated acceptance lane:
  - `research/knowledge-hub/runtime/scripts/run_hypothesis_route_reentry_acceptance.py`
- new contract/runtime coverage in:
  - `research/knowledge-hub/tests/test_hypothesis_route_reentry_contracts.py`
  - `research/knowledge-hub/tests/test_runtime_scripts.py`
  - `research/knowledge-hub/tests/test_topic_replay.py`
  - `research/knowledge-hub/tests/test_schema_contracts.py`
- documentation and runbook updates across:
  - `research/knowledge-hub/README.md`
  - `research/knowledge-hub/runtime/README.md`
  - `research/knowledge-hub/runtime/AITP_TEST_RUNBOOK.md`

## Outcome

Phase `150` now closes the first bounded route re-entry slice:

- `status --json`, `research_question.contract.md`, and the runtime protocol
  note now surface parked-route re-entry status plus its condition summary
- `replay-topic --json` exposes the same `route_reentry` payload plus the
  re-entry-ready count and adds parked-route artifacts into the reading path
- the new isolated acceptance proves deferred waiting conditions and ready
  follow-up returns can coexist without auto-reactivating the deferred route or
  writing a parent reintegration receipt
