- Add validateStoreExists() helper to check store directory existence
- Modify openStore() to accept shouldCreate parameter (default: false)
- Update read commands to validate store exists first
- Update write commands (init, put, schema put, hash) to allow creation
- Add 10 E2E tests covering all affected commands
- Improve error message: "Store not found at <path>" vs "Node not found"
Commands that now validate:
- get, has, verify, refs, walk, cat
- schema get, schema list
Commands that still create:
- init, put, schema put, hash
- var commands (use openVarStore)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
xiaoju