# Phase 161 Summary

Status: implemented in working tree

## Goal

Close the next post-`v1.86` gap by turning transition clearance into an
operator-visible transition-followthrough surface instead of leaving operators
to infer what bounded transition work should resume after clearance.

## What Landed

- route transition-followthrough payload construction and runtime/read-path
  rendering in:
  - `research/knowledge-hub/knowledge_hub/runtime_read_path_support.py`
- runtime protocol rendering for the new transition-followthrough section in:
  - `research/knowledge-hub/knowledge_hub/kernel_markdown_renderers.py`
  - `research/knowledge-hub/knowledge_hub/runtime_bundle_support.py`
- replay support for `none`, `held_by_clearance`, and `ready`
  transition-followthrough visibility in:
  - `research/knowledge-hub/knowledge_hub/topic_replay.py`
- public runtime-bundle schema coverage for `route_transition_followthrough` 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_transition_followthrough_acceptance.py`
- new contract/runtime coverage in:
  - `research/knowledge-hub/tests/test_hypothesis_route_transition_followthrough_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 `161` now closes the first bounded route transition-followthrough slice:

- `status --json` and the runtime protocol note now surface one
  `route_transition_followthrough` summary with `none`,
  `held_by_clearance`, and `ready` states
- `replay-topic --json` exposes the same transition-followthrough payload plus
  the follow-through status on the replay surface
- the new isolated acceptance proves AITP can make post-clearance transition
  follow-through explicit without widening into fresh runtime mutation
