A bridge for controlling Cadence Virtuoso, an electronic-design program used to create circuit diagrams, layouts, and simulations, through Python and its remote command interface.

Use it to automate schematics, circuit layouts, cell views, simulations, and other Virtuoso or Maestro tasks.

It lets local Python code work with a remote Virtuoso session while requiring documented commands instead of guessed ones.

virtuoso — Skill for Claude Code and Codex by Arcadia-1

Install

Getting it into your agent

There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/arcadia-1/virtuoso-bridge-lite/virtuoso/github.svg)](https://agentmods.dev/skills/arcadia-1/virtuoso-bridge-lite/virtuoso)

Your own site

<a href="https://agentmods.dev/skills/arcadia-1/virtuoso-bridge-lite/virtuoso"><img src="https://agentmods.dev/badge/skills/arcadia-1/virtuoso-bridge-lite/virtuoso/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/arcadia-1/virtuoso-bridge-lite/virtuoso"><img src="https://agentmods.dev/badge/skills/arcadia-1/virtuoso-bridge-lite/virtuoso.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 8,665 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00053	$0.08665
Opus 5	$0.00026	$0.04333
Sonnet 5	$0.00011	$0.01733
Haiku 4.5	$0.00005	$0.00867

Measured 6d ago against content hash 0a9b311228ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

virtuoso scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

client.fetch(expr, fields) # batch ~>slot extract (see below)

skills/virtuoso/SKILL.md · 658 lines

How it starts

The opening of the file, as written. The whole thing — 658 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Virtuoso Skill

CRITICAL: Do NOT invent SKILL code or API calls from memory. Before writing any SKILL expression or calling any Python API function:

Search references/ for the function name or keyword

Check examples/ for a working example of the same operation

Read the actual function signature (help() for Python, references/*.md for SKILL)

If the function is not documented in references or examples, it probably does not exist or has a different name. Never guess parameter names -- verify first.

Mental Model

You control a remote Cadence Virtuoso through virtuoso-bridge. Python runs locally; SKILL executes remotely in the Virtuoso CIW. SSH tunneling is automatic.

 Local (Python)                    Remote (Virtuoso)
┌──────────────────┐   SSH tunnel  ┌──────────────────┐
│ VirtuosoClient   │ ────────────► │ CIW (SKILL)      │
│                  │               │                  │
│ • schematic.*    │               │ • dbCreateInst   │
│ • layout.*       │               │ • schCreateWire  │
│ • execute_skill  │               │ • mae*           │
│ • load_il        │               │ • dbOpenCellView │
└──────────────────┘               └──────────────────┘

Three abstraction levels

Level	When to use	Example
Python API	Schematic/layout editing — structured, safe	`client.schematic.create(lib, cell)`
Inline SKILL	Maestro, CDF params, anything the API doesn't cover	`client.execute_skill('maeRunSimulation()')`
SKILL file	Bulk operations, complex loops	`client.load_il("my_script.il")`

Always use the highest level that works. Drop to a lower level only when needed.

Never guess function names. If the function isn't in the examples below, read the relevant references/ file before writing the call. Fabricating a wrong name wastes time debugging in CIW.

Five domains

Domain	What it does	Python package	API docs
Schematic	Create/edit schematics, wire instances, add pins	`client.schematic.*`	`references/schematic-python-api.md`, `references/schematic-skill-api.md`
Symbol	Generate, edit, and read symbol views	`client.symbol.*`	`references/symbol-python-api.md`
Layout	Create/edit layout, add shapes/vias/instances	`client.layout.*`	`references/layout-python-api.md`, `references/layout-skill-api.md`
Maestro	Read/write ADE Assembler config, run simulations	`client.maestro.*`	`references/maestro-python-api.md`, `references/maestro-skill-api.md`
Library	Read/create/rename/delete libraries, bind technology	`client.library.*`	`references/library-python-api.md`
Netlist (si)	Batch netlist generation without Maestro	`simInitEnvWithArgs` + `si` CLI	See "Batch Netlist (si)" section below
SKILL Finder	Search SKILL function names and get detailed docs	`client.find_skill()`, `client.get_skill_more_info()`	`references/skill-finder-python-api.md`
General	File transfer, screenshots, raw SKILL, .il loading	`client.*`	See below

Read the full file on GitHub · 658 lines

Files

What ships with it

18 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

6d ago Changed · -3 lines 0a9b311228ac
12d ago First seen · 661 lines · 53 tokens per session scan A 1ec66cfecb2a

Subscribe to this mod's changes

virtuoso is a skill published in the GitHub repository Arcadia-1/virtuoso-bridge-lite (717 stars, last pushed 2d ago), licensed MIT. It adds 53 tokens to every session and 8,665 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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