vyges-extract — parasitic extraction

Part of the Vyges Loom suite. Install once with vyges install loom, then run vyges loom extract. It’s also a standalone vyges-extract binary on your PATH (the integration contract for flow authors).

vyges-extract reads a routed layout and the PDK’s parasitic rules and produces SPEF — the resistance and capacitance of every net — so timing and power analysis reason about the real interconnect, not an idealized one.

Run it

vyges install loom                                 # one-time: fetch the Loom suite
vyges loom extract demo                            # instant sample SPEF (no setup)
vyges loom extract run  design.ext -o design.spef  # extract RC → SPEF
vyges loom extract run  design.ext --json          # per-net R/C summary
vyges loom extract check design.ext                # validate the job

See the full CLI reference (generated from --help).

Where it sits

.ext job in → .spef out, read directly by vyges-sta-si. Extraction accuracy is governed by the PDK’s parasitic rules — the engine is open, the calibration is foundry-specific. See the data spine.

Source & releases

• Repo: https://github.com/vyges-tools/extract
• Binaries: https://github.com/vyges-tools/extract/releases
• Apache-2.0. Per-foundry calibration plugins are separate (NDA).