# Phase 161: Hypothesis Route Transition Followthrough Surface - Discussion Log

> **Audit trail only.** Do not use as input to planning, research, or execution agents.
> Decisions are captured in CONTEXT.md.

**Date:** 2026-04-12
**Phase:** 161-hypothesis-route-transition-followthrough-surface
**Areas discussed:** transition-followthrough visibility, relation to clearance, bounded scope

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## Surface Placement

| Option | Description | Selected |
|--------|-------------|----------|
| extend the existing route ladder with explicit transition follow-through | preserves one visible operator truth path | ✓ |
| invent a separate post-checkpoint subsystem | would fragment the operator model | |

## Relation To Existing Mechanisms

| Option | Description | Selected |
|--------|-------------|----------|
| coexist with current route transition-clearance and helper mechanisms | keeps current execution surfaces intact | ✓ |
| auto-trigger fresh runtime mutation from the new follow-through surface | widens scope too far | |

## Scope

| Option | Description | Selected |
|--------|-------------|----------|
| declarative transition-followthrough visibility | closes the immediate gap cleanly | ✓ |
| route-state mutation or automatic branch resumption | too wide for the immediate next milestone | |
