Misty

Misty is a modern IDL (Interface Definition Language) and networking framework for building high-performance distributed systems—analogous to Protobuf/gRPC, but designed around newer transports:

• QUIC for efficient, secure, low-latency communication
• WebTransport when targeting web clients

Misty aims to keep the ergonomics and workflow you’d expect from schema-driven development (schemas + interfaces + codegen), while embracing modern networking and a cohesive toolchain.

Status: Active and under development. Expect rapid iteration.

The mistyc tool

Misty’s workflow centers around a single, all-in-one CLI tool: mistyc.

Planned capabilities include:

• Code generation from Misty IDLs (initially Rust; TypeScript planned)
• Package management (workspace management, registry integration)
• Formatting and linting for Misty definitions
• Protobuf → Misty conversion to help migrate existing projects

Workspace crates

This repository is a Cargo workspace containing multiple crates (compiler, parser, networking, codegen, AST, etc.).
The long-term goal is to provide a complete end-to-end experience: define interfaces once → generate types + stubs → ship services/clients across environments.

MSRV and versioning policy

Misty follows a clearly defined Rust/MSRV policy:

• MSRV: Rust 1.92.0
• Rust minor version bumps (e.g. 1.92 → 1.93) are not considered breaking for Misty; they result in a minor version bump for Misty crates.
• Rust major versions and edition changes are considered breaking; they result in a major version bump for Misty crates.

AI-friendly development

This is an AI-friendly project. If you’re using AI tools to contribute, start with AGENTS.md.

Changelog

Release notes are tracked in CHANGELOG.

If you are using Misty as a dependency, you may also want to monitor workspace crate versions since the repository contains multiple crates that may evolve at different speeds.

• Unreleased: changes on main that have not shipped in a published release yet
• 0.0.x: early development releases; breaking changes may occur between patch versions

Contributing

Contributions are welcome—especially around the compiler pipeline, codegen targets, networking runtime, and tooling UX.

See CONTRIBUTING.md for guidelines on how to get involved.

License

Licensed under BSD-3. See LICENSE.md.