netlist

netlist is a skill for Claude Code, Codex from Arcadia-1/virtuoso-bridge-lite. It costs 90 tokens per session (715 once invoked), scanned A, original, MIT.

A cleanup and organization workflow for Spectre and SPICE transistor netlists, which are text descriptions of electronic circuits. It turns generated design-tool output into a readable reference circuit while preserving the original file.

In plain words
What is it for?
Preparing analog circuits for review, splitting the circuit from its testbench and simulation setup, renaming random nodes and instances, and removing selected layout-derived parameters when appropriate.
Why use it?
Generated netlists often mix the circuit being tested with testbench and simulation settings, and may contain meaningless names or layout details. This workflow separates those parts and identifies what still needs review.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Good fit Preparing analog circuits for review, splitting the circuit from its testbench and simulation setup, renaming random nodes and instances, and removing selected layout-derived parameters when appropriate.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/arcadia-1/virtuoso-bridge-lite/netlist
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Arcadia-1/virtuoso-bridge-lite --skill netlist
Clone the repo
git clone --depth 1 https://github.com/Arcadia-1/virtuoso-bridge-lite

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.

agentmods badge for netlist

README.md
[![agentmods](https://agentmods.dev/badge/skills/arcadia-1/virtuoso-bridge-lite/netlist/github.svg)](https://agentmods.dev/skills/arcadia-1/virtuoso-bridge-lite/netlist)
Your own site
<a href="https://agentmods.dev/skills/arcadia-1/virtuoso-bridge-lite/netlist"><img src="https://agentmods.dev/badge/skills/arcadia-1/virtuoso-bridge-lite/netlist/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.

agentmods 80×15 button for netlist

Your own site · 80×15
<a href="https://agentmods.dev/skills/arcadia-1/virtuoso-bridge-lite/netlist"><img src="https://agentmods.dev/badge/skills/arcadia-1/virtuoso-bridge-lite/netlist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 715 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00090 $0.00715
Opus 5 $0.00045 $0.00358
Sonnet 5 $0.00018 $0.00143
Haiku 4.5 $0.00009 $0.00072

Measured 10d ago against content hash fa1a907f4ff1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

netlist scanned grade A with 0 findings 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 10d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/check_spectre_netlist.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/netlist/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Netlist Semantic Cleanup

Use this skill when converting generated netlists into readable, reviewable Spectre/SPICE reference decks.

Principle

The primary cleanup engine is semantic understanding by the model and engineer. Do not treat netlist cleanup as a blind text rewrite. A checker can report leftover tool artifacts, but it cannot decide circuit boundaries, node meaning, or instance names.

Workflow

  1. Preserve the raw generated artifact. Never edit ADE/PEX output in place.
  2. Read enough context to understand the circuit: ports, hierarchy, stimulus, measurements, clocking, biasing, and intended DUT boundary.
  3. Read references/cleaning.md before curating a real design.
  4. Draft the semantic cleanup plan:
    • DUT subckt or wrapper interface.
    • Testbench-owned supplies, clocks, stimulus, loads, probes, and analyses.
    • Run-deck-owned parameters, model includes, corners, sweeps, and saves.
    • Rename map for random nodes/instances, plus unresolved review notes.
  5. Create the clean netlist as a curated source artifact. Use model reasoning to split DUT/testbench/run decks and to choose semantic names.
  6. Run the checker only after the semantic pass:
python skills/netlist/scripts/check_spectre_netlist.py netlist/dut/block.scs --mode dut
python skills/netlist/scripts/check_spectre_netlist.py netlist/tb/tb_block.scs --mode tb

The checker reports suspicious MOS tail parameters, random-looking node names, generic instance names, and DUT/testbench mixing. It does not rewrite files and should not be used as the main cleanup mechanism.

Rules

  • Preserve MOS instance parameters by default when numerical behavior matters. Removing layout side-effect tails is an explicit stripped-reference choice, not the default.
  • If a stripped reference is requested, it may remove ad/as, pd/ps, nrd/nrs, sa/sb/sca/scb, sp*, DFM, stress, proximity, and extraction parameters, but expect performance differences and validate against the full-parameter or raw deck.
  • Split reusable artifacts into DUT, testbench, and run decks. A clean DUT file should not contain supplies, clocks, sweeps, saves, probes, or analysis statements.
  • At the top of every curated netlist file or section containing MOS devices, add an explicit terminal-order comment, for example: // MOS terminal order: D G S B (drain gate source bulk/body).
  • Replace random names (net1, _net23, N_*, numeric mesh nodes, I42, M0) with semantic names where the circuit meaning is known. If meaning is unknown, leave a short review note instead of guessing.
  • Validate after cleanup with a parser or Spectre syntax/smoke run when Cadence is available.

Read the full file on GitHub · 62 lines

Files

What ships with it

2 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.

  1. 10d ago First seen · 62 lines · 90 tokens per session scan A fa1a907f4ff1

Subscribe to this mod's changes

netlist is a skill published in the GitHub repository Arcadia-1/virtuoso-bridge-lite (709 stars, last pushed 6d ago), licensed MIT. It adds 90 tokens to every session and 715 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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