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starccm-sim

starccm-sim is a skill for Claude Code, Codex from svd-ai-lab/sim-cli. It costs 83 tokens per session (897 once invoked), scanned A, original, Apache-2.0.

A guide for controlling Simcenter STAR-CCM+, an engineering program for computational fluid dynamics and other physics simulations, through batch commands or Java macros. A macro is a small program that performs application actions.

In plain words
What is it for?
Running saved simulation projects, generating meshes, setting up solvers, executing Java automation, and extracting results from one-off batch runs.
Why use it?
It prevents attempts to use an unsupported Python interface and encourages the smallest execution path that produces checkable results. It also accounts for the required software license.

Skill for Claude CodeCodex

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

not rated 239repo +6 yesterday A scan 83 tokens original Apache-2.0

Good fit Running saved simulation projects, generating meshes, setting up solvers, executing Java automation, and extracting results from one-off batch runs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/svd-ai-lab/sim-cli/starccm
View source ↗ svd-ai-lab/sim-cli
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 svd-ai-lab/sim-cli --skill starccm
Clone the repo
git clone --depth 1 https://github.com/svd-ai-lab/sim-cli

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 starccm-sim

README.md
[![agentmods](https://agentmods.dev/badge/skills/svd-ai-lab/sim-cli/starccm/github.svg)](https://agentmods.dev/skills/svd-ai-lab/sim-cli/starccm)
Your own site
<a href="https://agentmods.dev/skills/svd-ai-lab/sim-cli/starccm"><img src="https://agentmods.dev/badge/skills/svd-ai-lab/sim-cli/starccm/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 starccm-sim

Your own site · 80×15
<a href="https://agentmods.dev/skills/svd-ai-lab/sim-cli/starccm"><img src="https://agentmods.dev/badge/skills/svd-ai-lab/sim-cli/starccm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 897 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.
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 $0.00083 $0.00897
Opus 5.5 $0.00033 $0.00359
Sonnet 5.5 $0.00017 $0.00179
Haiku 4.5 $0.00008 $0.00090

Measured 2d ago against content hash bb4efa30b446, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

starccm-sim 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 2d 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.

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.

plugins/starccm/src/sim_plugin_starccm/_skills/starccm/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

starccm-sim

Skill for controlling Simcenter STAR-CCM+ through the simplest real path that can produce evidence: direct starccm+ launcher/batch commands, saved .sim inspection, native Java macros, or sim-cli when its runtime layer is useful.

First principles

  1. Star-CCM+ uses Java macros, not Python scripts. Every automation script is a .java file extending StarMacro. There is no pip-installable Python SDK.
  2. Execution is batch-mode subprocess. starccm+ -batch macro.java [case.sim] — sim never imports Star-CCM+ libraries.
  3. The macro recorder is your best API discovery tool. Record GUI actions → read generated .java → adapt.
  4. License is required. CDLMD_LICENSE_FILE must point to a valid license file. The driver auto-detects license.dat near the installation.

Hard constraints

  • Script format: .java files only. Must extends StarMacro and import star.common.*.
  • Output convention: Print a JSON object via sim.println(jsonString) as the last meaningful output line. The driver's parse_output() extracts it.
  • No persistent session: Current driver is one-shot only (supports_session = False). Each sim run starts and stops Star-CCM+.
  • Startup overhead: ~15-20s per run (JVM + license checkout). Plan macros to do meaningful work per invocation.

File index

Path What it contains When to read
base/reference/java_macro_api.md Java macro API reference — classes, methods, patterns When writing any macro
base/reference/batch_execution.md CLI flags, license setup, parallel execution When configuring runs
base/snippets/starccm_01_smoke_test.java Minimal connectivity test First run verification
base/snippets/starccm_02_pipe_flow.java Geometry creation + volume mesh generation E2E reference
base/known_issues.md Vendor quirks and workarounds When debugging failures
solver/21.02/notes.md Version-specific notes for 2602 (21.02) After version detection

Read the full file on GitHub · 67 lines

Files

What ships with it

7 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. 2d ago First seen · 67 lines · 83 tokens per session scan A bb4efa30b446

Subscribe to this mod's changes

starccm-sim is a skill published in the GitHub repository svd-ai-lab/sim-cli (239 stars, last pushed yesterday), licensed Apache-2.0. It adds 83 tokens to every session and 897 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-19.

Scientificabaqusagent-skillsai-agentscaecfdphysics-simulation
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