lady-deirdre

Can build syntax trees from incomplete or erroneous source code, as highlighted in the error resilience feature, making it robust for editor integrations and real-time feedback.

Continuously patches in-memory codebase structures in response to file changes, enabling fast updates even in large codebases, per the incremental compilation description.

Has no third-party dependencies beyond Rust standard library and macros, offering a lightweight and extendable foundation for compiler development, as stated in the self-sufficient API feature.

Compatible with wasm-targets, allowing deployment in browser environments for web-based language tools, which is explicitly mentioned in the key features.