pcb

Use before creating or modifying reusable PCB registry content, including component packages, symbols, footprints, STEP models, datasheets, or reusable Zener modules. Also use when working inside a registry component package or changing KiCad/Zener files that define reusable parts. Covers search-before-authoring, datasheet-backed cleanup, package structure, sourcing checks, and validation.

Canonical Zener HDL semantics and workflow. Use before reading or modifying `.zen` files. Covers module loading and instantiation, `io()`/`config()` API design, nets/interfaces/power domains, components and sourcing, `pcb.toml` manifests, stdlib/package discovery with `pcb doc`, physical units, generics, checks, DNP patterns, naming, and validation.

Search the registry for prepared Zener modules, reference designs, and component symbols while designing a board, subsystem, or spec. Use for board-facing part/module selection with `pcb search -m registry:modules` and `pcb search -m registry:components`, API inspection, sourcing comparison, and deciding what to instantiate. If no suitable registry package exists, prepare a librarian request instead of importing or authoring components inline.

Adds an ngspice-backed simulation testbench to a Zener `.zen` design. Use when the user asks to simulate a circuit, validate behavior in SPICE, or wire a `spice_model=SpiceModel(...)` into a leaf component. Covers `pcb sim`, `Simulation` property, and ngspice `.control` blocks with `tran`/`PULSE`/`PWL` sources and SVG `hardcopy` output.

Read datasheets and technical PDF documents with `pcb scan`. Use when the user gives a local PDF path or an `http(s)` datasheet/document URL, when a task requires reading, summarizing, extracting information from, or answering questions about a datasheet or technical PDF, or when a KiCad symbol / `.kicad_sym` provides a `Datasheet` property to resolve. Run `pcb scan <input>` in bash, treat stdout as the generated `.md` path, then read that markdown file.