# Requirements: v1.87 Hypothesis Route Transition Followthrough Surface

## Milestone Goal

Close the next post-`v1.86` research-control gap so AITP can turn transition
clearance into one operator-visible follow-through surface, instead of forcing
operators to infer what bounded transition work should resume immediately after
clearance.

## Final Requirements Status

### Route Transition-Followthrough Surface

- [x] `REQ-HFOLLOW-01`: runtime surfaces can materialize a bounded route
  transition-followthrough summary from route transition clearance plus
  existing transition refs.
- [x] `REQ-HFOLLOW-02`: replay/read paths expose the follow-through decision
  directly instead of leaving that follow-through implicit.

### Coexistence Rule

- [x] `REQ-HFOLLOW-03`: the route transition-followthrough surface coexists
  cleanly with the current route_transition_clearance surface and helper
  mechanisms instead of auto-triggering fresh runtime mutation.

### Verification

- [x] `REQ-VERIFY-01`: the milestone closes with one bounded isolated
  route transition-followthrough acceptance path plus targeted regression
  coverage for the new follow-through surface.

## Traceability

| Requirement | Phase | Status |
|-------------|-------|--------|
| REQ-HFOLLOW-01 | Phase 161 | Complete |
| REQ-HFOLLOW-02 | Phase 161 | Complete |
| REQ-HFOLLOW-03 | Phase 161 | Complete |
| REQ-VERIFY-01 | Phase 161 | Complete |
