# Phase 163: Hypothesis Route Transition Commitment Surface

## Status

complete

## Goal

Close the next post-`v1.88` gap by turning transition resumption into an
operator-visible transition-commitment surface.

## Background

AITP already has:

- question-level `competing_hypotheses`
- bounded `route_activation`, `route_reentry`, `route_handoff`, and
  `route_choice` visibility
- bounded `route_transition_gate`, `route_transition_intent`,
  `route_transition_receipt`, `route_transition_resolution`,
  `route_transition_discrepancy`, `route_transition_repair`,
  `route_transition_escalation`, `route_transition_clearance`,
  `route_transition_followthrough`, and `route_transition_resumption`
  visibility

But it still lacked one explicit place to say:

- whether a resumed route has become the durable committed bounded lane
- which bounded route artifact proves that commitment
- how that commitment relates back to the current resumption state
- how that commitment coexists with the current helper mechanisms

## Requirements

- derive one bounded route transition-commitment summary from route transition
  resumption plus current route state
- expose route-transition commitment through runtime/read-path/replay surfaces
- keep the transition-commitment surface coexistence with current
  transition-resumption and helper mechanisms
- add one isolated acceptance lane for the bounded transition-commitment path

## Depends On

Phase 162 (`v1.88` route transition-resumption visibility must remain closed
and available as the base layer)

## Deliverables

1. hypothesis route transition-commitment runtime surface
2. replay/read-path visibility for explicit bounded transition-commitment state
3. isolated acceptance and aligned docs/tests

## Plans

- [x] `163-01`: add route transition-commitment summary to runtime/replay
  surfaces and isolated acceptance
