wado-lsp

The language service engine and the stdio LSP server. Scope and build targets are in WEP: LSP Architecture; how each part works is in its module doc. Open work is in TODO.md, and the LSP specification at https://microsoft.github.io/language-server-protocol/specifications/lsp/3.18/specification/.

Rules

• The crate compiles for wasm32-unknown-unknown (CI-enforced), so the browser playground runs it without a WASI host. Runtime I/O is the host's: wado-cli on the desktop, an in-memory host in the browser.
• Every AST walk goes through wado_compiler::ast::AstVisitor and its walk_* functions. A hand-written traversal silently skips whatever a later AST node adds.
• A query degrades to no answer on a partial Semantics, never fails: the frontend always produces one, and batch compilation alone checks Semantics::is_complete().
• A CompilerHost wrapper delegates every capability. A trait default in its place drops the wrapped host's dependency index (DiagnosticCollector).
• A file: URI is percent-decoded on the way in (Uri::to_filename) and re-encoded on the way out (location::filename_to_uri). Clients key documents by URI string, so a path that skips either names a different document.