Zener Language

Zener is Starlark plus PCB-specific modules, typed electrical connections, physical parts, sourcing, layout, and diagnostics.

Discover Before Authoring

Use pcb doc --package @stdlib or pcb doc --package <package> to inspect public APIs and their source roots. Read the installed implementation when exact behavior matters.

For CLI behavior, use the installed command's --help; do not invent or infer subcommands or flags. When version history matters, inspect the installed version and nearby entries in the pcb changelog instead of relying on old examples.

Modules and Components

A .zen file can be:

• a normal Starlark module imported with load(); or
• an instantiable schematic module imported with Module().

Relative paths stay within the current package. Cross-package imports use full package URLs: