orleans-rust-codegen

Manifest-driven generator for typed orleans-rust-client grain clients, available as both a library and a CLI.

It consumes a manifest emitted by the .NET bridge (GetManifest or orleans-rust-bridge-tools) and produces one Rust struct per grain contract, wrapping a GrainRef with typed methods. Type mapping covers the common primitive .NET types plus nullable types, arrays, and the standard generic collections (List<T> → Vec<T>, Dictionary<K, V> → HashMap<K, V>, ...); unrecognised types fall back to serde_json::Value. Methods with multiple parameters generate multi-argument functions, and an opt-in mode emits <method>_with_context variants that also return the response context.

CLI

orleans-rust-codegen \
  --manifest ./orleans-manifest.json \
  --out ./src/generated.rs \
  --with-response-context        # optional

Library

use orleans_rust_codegen::{generate, CodegenOptions, Manifest};

let manifest = Manifest::from_json_str(&json)?;
let code = generate(&manifest, &CodegenOptions::default())?;

Include the generated file inside a module annotated #[allow(dead_code, clippy::all)].

See the repository for the full picture.

License

MIT. Copyright (c) 2026 Monumental Systems, LLC.