# Phase 162 Summary

Status: implemented in working tree

## Goal

Close the next post-`v1.87` gap by turning transition follow-through into an
operator-visible transition-resumption surface instead of leaving operators to
infer whether ready follow-through has actually been resumed on the bounded
route.

## What Landed

- route transition-resumption 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-resumption section in:
  - `research/knowledge-hub/knowledge_hub/kernel_markdown_renderers.py`
  - `research/knowledge-hub/knowledge_hub/runtime_bundle_support.py`
- replay support for `none`, `waiting_followthrough`, `pending`, and
  `resumed` transition-resumption visibility in:
  - `research/knowledge-hub/knowledge_hub/topic_replay.py`
- public runtime-bundle schema coverage for `route_transition_resumption` 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_resumption_acceptance.py`
- new contract/runtime coverage in:
  - `research/knowledge-hub/tests/test_hypothesis_route_transition_resumption_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 `162` now closes the first bounded route transition-resumption slice:

- `status --json` and the runtime protocol note now surface one
  `route_transition_resumption` summary with `none`,
  `waiting_followthrough`, `pending`, and `resumed` states
- `replay-topic --json` exposes the same transition-resumption payload plus the
  resumption status on the replay surface
- the new isolated acceptance proves AITP can make route resumption explicit
  without widening into fresh runtime mutation
