The foundation layer beneath the Tom stack: a minimal-dependency utility package plus a CLI/tooling framework, surrounded by focused extensions for console, network, crypto, chat, and code-generation support.

D4rt runs Dart source at runtime in a permission-guarded sandbox. It is the dynamic-execution engine that lets Tom's AI scripting and flow layers generate and run code safely.

The reflection layer gives Tom programs runtime introspection and dynamic invocation, plus analyzer-based extraction of a codebase's API. It is the base technology behind auto-assembling Tom applications at runtime.

The VS Code extension ecosystem used to develop the Tom framework. A TypeScript extension hosts a Dart bridge that runs Dart scripts inside the editor with full VS Code API access, driven by a typed Dart scripting layer.