# Phase 162: Hypothesis Route Transition Resumption Surface

## Status

complete

## Goal

Close the next post-`v1.87` gap by turning transition follow-through into an
operator-visible transition-resumption 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`, and
  `route_transition_followthrough` visibility

But it still lacks one explicit place to say:

- whether ready follow-through has actually been resumed on the bounded route
- which bounded route artifact proves that resumption
- how that resumption relates back to the current follow-through state
- how that resumption coexists with the current helper mechanisms

## Requirements

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

## Depends On

Phase 161 (`v1.87` route transition-followthrough visibility must remain closed
and available as the base layer)

## Deliverables

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

## Plans

- [x] `162-01`: add route transition-resumption summary to runtime/replay
  surfaces and isolated acceptance
