# Tech stack

`Maestro` is a source-only TypeScript package that uses ECMAScript modules (ESM). Pi loads the TypeScript source directly. The package has no build step or compiled
`dist/` directory.

| Technology                     | Use                                                                                               |
|--------------------------------|---------------------------------------------------------------------------------------------------|
| TypeScript                     | Application code and static type checks with `tsc --noEmit`.                                      |
| Node.js                        | Runtime.                                                                                          |
| Pi                             | Extension host, agent APIs, and terminal interface.                                               |
| `pi-subagents`                 | `Builder`, `verifier`, and `simplifier` execution and activity tracking.                          |
| TypeBox                        | Schemas and runtime validation for configuration, workflow state, tool inputs, and agent reports. |
| Vitest with coverage           | Unit tests, integration tests, and code coverage.                                                 |
| Biome                          | Formatting and lint checks.                                                                       |
| Oxlint with `oxlint-anti-slop` | Additional lint and anti-slop checks.                                                             |