minimize-modelica-bug

minimize-modelica-bug is a skill for Claude Code, Codex from WolframResearch/system-modeler-ai-toolkit. It costs 170 tokens per session (6,560 once invoked), scanned C, original, MIT.

A reduction workflow for Modelica models that trigger failures in the System Modeler compiler or simulator.

In plain words
What is it for?
It helps shrink a model that causes internal errors, generated-code compilation failures, simulator internal errors, or kernel crashes, then prepares a report for Wolfram support.
Why use it?
It turns a large failing model into a smaller reproduction, making it easier to distinguish a tool failure from an ordinary model error and report the problem.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is [`../scripts/README.md`](../scripts/README.md).*.

Good fit It helps shrink a model that causes internal errors, generated-code compilation failures, simulator internal errors, or kernel crashes, then prepares a report for Wolfram support.

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Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/WolframResearch/system-modeler-ai-toolkit
agentmods
npx agentmods add skills/wolframresearch/system-modeler-ai-toolkit/minimize-modelica-bug

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 minimize-modelica-bug

README.md
[![agentmods](https://agentmods.dev/badge/skills/wolframresearch/system-modeler-ai-toolkit/minimize-modelica-bug/github.svg)](https://agentmods.dev/skills/wolframresearch/system-modeler-ai-toolkit/minimize-modelica-bug)
Your own site
<a href="https://agentmods.dev/skills/wolframresearch/system-modeler-ai-toolkit/minimize-modelica-bug"><img src="https://agentmods.dev/badge/skills/wolframresearch/system-modeler-ai-toolkit/minimize-modelica-bug/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 minimize-modelica-bug

Your own site · 80×15
<a href="https://agentmods.dev/skills/wolframresearch/system-modeler-ai-toolkit/minimize-modelica-bug"><img src="https://agentmods.dev/badge/skills/wolframresearch/system-modeler-ai-toolkit/minimize-modelica-bug.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 170 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,560 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00170 $0.06560
Opus 5.5 $0.00068 $0.02624
Sonnet 5.5 $0.00034 $0.01312
Haiku 4.5 $0.00017 $0.00656

Measured 9d ago against content hash c2d3dbd74c81, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

minimize-modelica-bug scanned grade C 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 9d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

shell-agnostic. For cleanup use `Remove-Item -Recurse -Force`, not `rm -rf`.
minimize-modelica-bug/SKILL.md · 505 lines

How it starts

The opening of the file, as written. The whole thing — 505 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Minimize a Modelica Compiler Bug

A compiler failure is a fault in System Modeler itself rather than in the model. Examples are an Internal error, generated code that does not compile, and a simulator that stops with an internal error. This skill shrinks the failing model to the smallest one that still fails with the same message, and writes a short report the user can send to Wolfram support. A small reproduction gets a bug fixed; a 5,000-line proprietary model usually does not.

Ordinary model errors are not compiler failures: type, lookup and balance errors, failed assertions, or a solver giving up. Fix those in the model instead, using validate-modelica or diagnose-modelica.

Before you run anything

This skill drives WSMKernelX through the shared launcher ../scripts/wsm_run.py and the reducer ../scripts/minimize_mo.py. Read the shared-conventions appendix at the end of this file first. It covers launcher resolution, the Windows-vs-Unix shell/Python rules, and the temp-dir and line-ending conventions that every step below assumes.

The reducer never touches the user's files. It works on copies in _wsm_minimize_temp/ next to the model. Tell the user: "Working in temporary directory _wsm_minimize_temp/; your model is not modified."

Workflow

1. Confirm that it is a compiler failure

Identify the model file and name — see Appendix → Picking the model name and, for a multi-file library, Appendix → Directory-form (multi-file) libraries. Then run it once:

python3 "<scripts-dir>/wsm_run.py" --mode simulate \
  --model "<path-to-ModelFile.mo>" --name ModelName --json
  • "compiler_failure" in the printed JSON is not null: this is a compiler failure. Note its head (the part of the message that identifies the fault) and the System Modeler version.
  • "compiler_failure" is null: it is not a compiler failure. Tell the user so, show the ordinary error the launcher printed, and help fix the model instead.

Read the full file on GitHub · 505 lines

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. 9d ago Changed · +4 lines c2d3dbd74c81
  2. 23d ago First seen · 501 lines · 170 tokens per session scan C de65ece52b58

Subscribe to this mod's changes

minimize-modelica-bug is a skill published in the GitHub repository WolframResearch/system-modeler-ai-toolkit (17 stars, last pushed 9d ago), licensed MIT. It adds 170 tokens to every session and 6,560 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-02.

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