claude_version_core 1.2.0

Layer 1 domain helpers: version management, settings I/O, and install utilities
Documentation 
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# claude_version_core

Layer 1 domain helpers for Claude Code version management and settings. Depends only on `claude_core`.

## Responsibility Table

| File | Responsibility |
|------|---------------|
| `Cargo.toml` | Crate manifest: depends on `claude_core` + `error_tools` |
| `src/` | Version detection, settings I/O domain logic |
| `tests/` | Unit tests for domain helpers |
| `verb/` | Shell scripts for each `do` protocol verb. |
| `runbox/` | Shell scripts for container-orchestrated operations. |