Open-source infrastructure for electronic design automation.

Community-maintained, license-permissive tooling for the open-silicon ecosystem: one engine and shared grammars handle reading, writing, and validating LEF, DEF, Liberty, SPEF, Verilog netlist, GDSII, and more — replacing the fragmented per-project implementations that currently make tool interoperability painful.

• Reading. Drop the format-specific parsers from open-source EDA tools (OpenROAD, OpenLane, Yosys, KLayout, …); load files through one engine driven by the shared community grammar repository.

• Writing. Construct EDA data programmatically in memory (Python or C++) and emit it in any supported format — the same grammar that parses also serialises. Build your own PDK, generate cell libraries, produce custom netlist views, write GDSII or Liberty files without depending on a format-specific encoder library. Bidirectional from day one.

• Schema validation before write. Walk a constructed value tree against the grammar without producing output; catch missing fields, type errors, and structural mistakes upfront with field-level error paths. The grammar is the schema — no duplicate type definitions to maintain in sync.

• Format evolution as a feature, not a problem. LEF moves 5.6 → 5.7 → 5.8. Liberty schemas drift across vendor revisions. Verilog adds SystemVerilog constructs. In rawast each format version is one community grammar file (lef-5.8.rawast, lib-2.0.rawast, …). Tools never have to "support the new version" — the grammar is the version. Migrations are rawast convert invocations between grammars; archives stay readable forever because each .jast container embeds the grammar that decoded it.

• Typed Python from any grammar. rawast pydantic <grammar> emits a Pydantic v2 module mirroring the grammar's parse/save shape — typed fields, IDE autocomplete, runtime validation, no duplicate type definitions to maintain. rawast pycode <grammar> <file> reads a real file and emits Python source that reconstructs the typed model — useful for fixtures, tutorials, and programmatic editing of existing files.

• rawast — the data-driven bidirectional PEG parser engine. One grammar drives parse, save, and validate. Shipped: pip install rawast (MIT, on PyPI). Verified on a 3,132-file production corpus: 1,171/1,171 GDSII files parse (750/750 byte-equivalent round-trip), 263/263 LEF round-trip across cell + tech LEFs (Sky130, asap7, gf130bcd, ihp-sg13g2, NanGate, gf180), 435/435 DEF round-trip including a 100MB+ production output, 1,440/1,440 OpenROAD Tcl flow scripts.

Every open-source EDA project ships its own parsers for the formats above. They diverge in quirks, bug-fix latency, and feature support; format revisions take months to propagate; new tooling pays the parser-writing tax upfront. The community-maintained alternative — one engine, shared grammars, bidirectional from day one — is what this organisation exists to build.

Maintained by Serge Rabyking, Marbella, Spain.