Implements two major features for project dependency management:
Transitive Dependency Resolution:
- DependencyGraph/DependencyNode for structured dependency tracking
- DependencyGraphBuilder with recursive resolution and cycle detection
- Topological sorting for correct install order (dependencies first)
- Version conflict detection with provenance tracking
- Full semver support: ^, ~, >=, <=, >, <, = constraints
- New `cmdforge deps tree` command to visualize dependency tree
- Install flags: --dry-run, --force, --verbose
Lock File Support (cmdforge.lock):
- Lockfile/LockedPackage/LockfileMetadata dataclasses
- Records exact versions of all dependencies (direct + transitive)
- Integrity verification via SHA256 hashes
- `cmdforge lock` to generate/update lock file
- `cmdforge verify` to check installed tools match lock
- Install flags: --frozen, --strict-frozen, --ignore-lock
62 new tests for version, dependency_graph, and lockfile modules.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
