Porting Codebases

A mechanical port: translating a working codebase from language S to language T while preserving architecture, module boundaries, names, and control flow. The result should read as if the source were transpiled — not as if someone designed it in T.

Step 0 — Arguments gate

Invoked with no arguments → stop and ask. Do nothing else first.

Routing itself depends on the arguments: you cannot answer "does PORTING.md exist in the target directory" without being told the target directory. So this gate comes before everything — before reading the source, before ls, before proposing options.