The CLI

vyrn run compiles to WebAssembly and runs it, and needs nothing installed. vyrn check diagnoses without running. vyrn build --target wasm writes the module; vyrn build puts the same bytes through wasm2c and clang into a native binary. Both are the same program — the route harness runs every example both ways and compares the bytes.

vyrn fmt writes the one canonical layout. It has no style options, and --check is the CI gate. vyrn doc writes Markdown API docs from the /// comments, and --verify fails when they drift from the code. vyrn test and vyrn bench have their own page.

vyrn why <file> answers with a module's audience and every import chain that reaches it. --cost reports, per function, the lines that allocate, copy, grow a container and keep a check. --capability fs lists every chain that pulls the file system into an artifact.