claude_version 1.6.1

Claude Code version manager: install, upgrade, and session lifecycle
Documentation 
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# Pattern Test Surface

### Scope

- **Purpose**: Test case specifications for claude_version pattern doc instances.
- **Responsibility**: Per-pattern test specs verifying pattern applicability and consequences.
- **In Scope**: Pattern test planning (PT- prefix, min 3 cases per spec).
- **Out of Scope**: Feature tests (-> `feature/`), CLI command tests (-> `cli/command/`).

### Overview Table

| Name | Purpose | Status |
|------|---------|--------|
| 01_version_lock.md | PT- test cases for 5-layer version lock strategy | ✅ |
| procedure.md | Workflow for creating and updating pattern test specs | ✅ |