# MetaCrate

MetaCrate is a test-driven, clean native Rust reimplementation of
[LibreMetaverse](https://github.com/cinderblocks/libremetaverse). LibreMetaverse
is a behavioral and API reference only: the finished project must not load,
host, bind to, invoke, or ship the .NET implementation. The current
stage is a compiling structural shell: crate boundaries mirror the .NET library
projects, public C# type names have Rust declarations, every upstream NUnit case
has a traceable placeholder, and every sample/tool project has a Rust binary
target. Types, StructuredData, Imaging, PrimMesher, both rendering adapters, and
the main assembly's packet/message/asset/primitive wire-data and core
runtime/networking slices now have complete callable, failure-only signatures;
the remaining avatar/world manager and extension slices plus semantic Rust test
translations are still required before the public API shim is complete.

The source snapshot, compatibility rules, dependency research, and ordered
implementation plan are in [RUSTREWRITE.md](RUSTREWRITE.md).

The authoritative compiled .NET surface is checked in as
[`api/public-api.json`](api/public-api.json). Every type and member has a
reviewed Rust destination in [`api/RUST-TYPES.tsv`](api/RUST-TYPES.tsv) and
[`api/RUST-MAPPING.tsv`](api/RUST-MAPPING.tsv); [`api/README.md`](api/README.md)
documents deterministic regeneration and validation.
All API crates expose the same typed `Error` for fallible unimplemented members;
infallible shims use `libremetaverse_types::unimplemented_api!` so placeholders
cannot look like successful behavior.

```sh
cargo build --workspace
cargo test --workspace --no-run
python3 tools/generate_rust_mapping.py --check
python3 tools/generate_api_shims.py --check
```

Running `cargo test --workspace` is intentionally red during the shim stage.