# Phase 156 Summary

Status: implemented in working tree

## Goal

Close the next post-`v1.81` gap by turning transition intent, transition
receipt, and current active route into an operator-visible transition-resolution
surface instead of leaving operators to stitch those surfaces together
manually.

## What Landed

- route transition-resolution 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-resolution section in:
  - `research/knowledge-hub/knowledge_hub/kernel_markdown_renderers.py`
  - `research/knowledge-hub/knowledge_hub/runtime_bundle_support.py`
- replay support for pending versus resolved versus none route-transition
  resolution visibility in:
  - `research/knowledge-hub/knowledge_hub/topic_replay.py`
- public runtime-bundle schema coverage for `route_transition_resolution` 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_resolution_acceptance.py`
- new contract/runtime coverage in:
  - `research/knowledge-hub/tests/test_hypothesis_route_transition_resolution_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 `156` now closes the first bounded route transition-resolution slice:

- `status --json` and the runtime protocol note now surface one
  `route_transition_resolution` summary with `pending`, `resolved`, and `none`
  states plus explicit active-route alignment
- `replay-topic --json` exposes the same transition-resolution payload plus the
  route-transition-resolution status on both current-position and conclusions lanes
- the new isolated acceptance proves AITP can synthesize pending handoff,
  recorded handoff receipt, and current active-route alignment into one
  operator-facing resolved outcome without fresh runtime mutation
