Introduction

Tong is an experimental Rust-first hermetic build system. The project explores what a direct, explicit build graph for Rust can look like when compile actions are described by their inputs, outputs, environment, toolchain, and command line.

The 0.1.0 release is an MVP. It can build simple Rust libraries and binaries from Cargo.toml or Tong.toml, materialize fixed source dependencies, run basic build scripts, and cache actions under target/tong.

Tong is not a complete security sandbox yet. Its current hermeticity boundary is the action model: clean environments, declared inputs and outputs, and cache keys that include relevant command and platform material.