# Phase 156: Hypothesis Route Transition Resolution Surface

## Status

complete

## 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.

## 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`, and
  `route_transition_receipt` visibility

But it still lacks one explicit place to say:

- what the resolved bounded handoff outcome is after comparing intent, receipt,
  and current active route state
- whether the handoff remained pending, completed onto the target, or became
  irrelevant because no handoff remained active
- which durable artifacts justify that resolved outcome
- how that resolution coexists with the current transition receipt and helper
  mechanisms

## Requirements

- derive one bounded route transition-resolution summary from route transition
  intent, route transition receipt, and current active route state
- expose route-transition resolution through runtime/read-path/replay surfaces
- keep the transition-resolution surface coexistence with current
  transition-receipt and helper mechanisms
- add one isolated acceptance lane for the bounded transition-resolution path

## Depends On

Phase 155 (`v1.81` route transition-receipt visibility must remain closed and
available as the base layer)

## Deliverables

1. hypothesis route transition-resolution runtime surface
2. replay/read-path visibility for explicit resolved handoff outcome
3. isolated acceptance and aligned docs/tests

## Plans

- [x] `156-01`: add route transition-resolution summary to runtime/replay
  surfaces and isolated acceptance
