# Roadmap: v1.77 Hypothesis Route Handoff Surface

## Result

`v1.77` is complete.

## Overview

`v1.77` closed the next post-`v1.76` research-control gap around ready
parked-route handoff visibility. It derived one bounded `route_handoff` summary
from route activation plus route re-entry, surfaced one primary handoff
candidate plus explicit keep-parked decisions through runtime status and
replay, and proved the bounded coexistence path with a dedicated isolated
acceptance lane.

**Phases:** 151
**Total Plans:** 1
**Total Tasks:** 2
**Shipped:** 2026-04-12

## Phase Details

### Phase 151: Hypothesis Route Handoff Surface

**Goal:** Add one durable route handoff summary for ready parked routes and
expose it through runtime/read-path/replay flows without auto-reactivating
deferred candidates or auto-reintegrating child returns.

**Plans:** 1 plan

Plans:

- [x] `151-01`: add route handoff summary to runtime/replay surfaces and
  isolated acceptance

**Outcome:**

- landed `route_handoff` payload construction and rendering on the
  runtime/read-path layer
- surfaced one primary handoff candidate plus explicit keep-parked decisions
  through runtime status, the runtime protocol note, and replay
- aligned schema, docs, and isolated acceptance coverage for the bounded route
  handoff path

## Milestone Summary

**Key Accomplishments:**

- ready parked routes now surface one explicit primary handoff candidate
- runtime status and replay now keep keep-parked decisions visible when more
  than one parked route is technically ready
- one isolated acceptance lane now proves handoff visibility stays declarative
  and does not mutate runtime state

**Issues Resolved:**

- closed the gap where ready parked routes were visible but still lacked one
  concrete bounded handoff candidate
- closed the gap where multiple ready parked routes could not be explained as
  one candidate plus explicit keep-parked decisions

**Issues Deferred:**

- integrating the primary handoff candidate into one explicit current-route
  choice summary
- automatic candidate reactivation and parent-topic reintegration mutation
- automatic branch spawning and multi-branch scheduling

**Technical Debt / Honest Gaps:**

- the first slice makes handoff candidates visible, but it does not yet merge
  them into one hypothesis-aware current-route choice surface

---

For current planning state after `v1.77`, continue from the next fresh
milestone definition.
