Agent skill

Calculix Fem

Workflow skill for driving the CalculiX MCP server over .inp decks — model inspection, in-place design-variable edits, ccx solve, .dat result reading, and resultmesh.json export for the viewer.

MITAuto-check passedAgent Workflows

Install Calculix Fem

skills CLI

$ npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install Cai-aa/CAE-Agent-Hub calculix-fem --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Skill/calculix/calculix-fem .claude/skills/calculix-fem && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "calculix-fem" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/calculix/calculix-fem into .claude/skills/calculix-fem/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculix-fem", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/calculix/calculix-fem

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install Cai-aa/CAE-Agent-Hub calculix-fem --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .agents/skills && cp -r skills-src/Skill/calculix/calculix-fem .agents/skills/calculix-fem && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "calculix-fem" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/calculix/calculix-fem into .agents/skills/calculix-fem/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculix-fem", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install Cai-aa/CAE-Agent-Hub calculix-fem --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/Skill/calculix/calculix-fem .cursor/skills/calculix-fem && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "calculix-fem" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/calculix/calculix-fem into .cursor/skills/calculix-fem/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculix-fem", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/Cai-aa/CAE-Agent-Hub.git --path Skill/calculix/calculix-fem

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install Cai-aa/CAE-Agent-Hub calculix-fem --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/Skill/calculix/calculix-fem .gemini/skills/calculix-fem && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "calculix-fem" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/calculix/calculix-fem into .gemini/skills/calculix-fem/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculix-fem", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install Cai-aa/CAE-Agent-Hub calculix-fem

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .github/skills && cp -r skills-src/Skill/calculix/calculix-fem .github/skills/calculix-fem && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "calculix-fem" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/calculix/calculix-fem into .github/skills/calculix-fem/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculix-fem", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install Cai-aa/CAE-Agent-Hub calculix-fem --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/Skill/calculix/calculix-fem .opencode/skills/calculix-fem && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "calculix-fem" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/calculix/calculix-fem into .opencode/skills/calculix-fem/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculix-fem", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: calculix-fem
GitHub stars: 1k
Token cost: ~569 tokens
SKILL.md length: 264 words
Files: 1
Skills in repo: 57
Repo updated: Sep 30, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Workflow skill for driving the CalculiX MCP server over .inp decks — model inspection, in-place design-variable edits, ccx solve, .dat result reading, and resultmesh.json export for the viewer.

Works in 7 steps: fea_health — confirm meshio is available… → parse_inp — inspect the .inp (nodes,… → list_design_vars_tool — list tunable… → …
An agent must run an open-source linear-static FEM analysis on CalculiX
SKILL.md covers When to Use, Workflow, Rules and Example
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Calculix Fem is an agent skill from Cai-aa/CAE-Agent-Hub. Workflow skill for driving the CalculiX MCP server over .inp decks — model inspection, in-place design-variable edits, ccx solve, .dat result reading, and resultmesh.json export for the viewer. Use when an agent must run an open-source linear-static FEM analysis on CalculiX, tune section/material/load parameters, or produce a viewer-renderable result.

Its SKILL.md is about 570 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows. It works with Model Context Protocol. The licence is MIT.

When your agent uses it

An agent must run an open-source linear-static FEM analysis on CalculiX
Tune section/material/load parameters
Produce a viewer-renderable result

Example prompts

“/calculix-fem”

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

fea_health — confirm meshio is available and ccx is detected.
parse_inp — inspect the .inp (nodes, elements, sections, materials, loads).
list_design_vars_tool — list tunable variables; each carries a var_id.
modify_card_tool — change a variable by var_id (pure-text, in place).
run_solver_tool — submit the deck to ccx.
read_results_tool — read max von Mises (self-computed), max |U|, volume, mass.
export_results_tool — write result_mesh.json for the viewer.

What it can do on your machine

Read from SKILL.md and the folder at commit 194ef49. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Calculix Fem loads about 569 tokens when it runs. Until then it costs about 92 tokens; SKILL.md has 264 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~92
When it runs · the whole SKILL.md, loaded when a task matches: ~569

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Cai-aa/CAE-Agent-Hub at commit 194ef49, republished under its MIT licence (© Cai-aa). 264 words, ~569 tokens.

Download SKILL.mdSave it as .claude/skills/calculix-fem/SKILL.md (or your agent's skills folder).

name: calculix-fem
description: Workflow skill for driving the CalculiX MCP server over .inp decks — model inspection, in-place design-variable edits, ccx solve, .dat result reading, and result_mesh.json export for the viewer. Use when an agent must run an open-source linear-static FEM analysis on CalculiX, tune section/material/load parameters, or produce a viewer-renderable result.

CalculiX FEM

CalculiX (ccx) is an open-source FEM solver (GPLv2, no license). It reads Abaqus-style .inp decks and writes text .dat results plus .frd field output. ccx returns exit code 0 even on *ERROR, so never judge success by the exit code — the solver layer checks stdout for *ERROR and requires a data row in the .sta.

When to Use

Use this skill when an agent must run an open-source linear-static FEA analysis on CalculiX: parse/inspect a .inp deck, tune section/material/load parameters, solve with ccx, read .dat results, or export a viewer-renderable result. For commercial solvers (Abaqus/Ansys), use those solvers' own skills instead.

Workflow

fea_health — confirm meshio is available and ccx is detected.
parse_inp — inspect the .inp (nodes, elements, sections, materials, loads).
list_design_vars_tool — list tunable variables; each carries a var_id.
modify_card_tool — change a variable by var_id (pure-text, in place).
run_solver_tool — submit the deck to ccx.
read_results_tool — read max von Mises (self-computed), max |U|, volume, mass.
export_results_tool — write result_mesh.json for the viewer.

Rules

Units follow the .inp working system (commonly mm-t-s-MPa). Report them.
.dat has no von Mises column and no total volume/mass — these are derived.
Never rewrite a deck with meshio.write (it drops cards and corrupts element types). Use modify_card_tool.
For the deck to produce both text results and the field output the viewer needs, include *NODE PRINT/*EL PRINT (for .dat) and *NODE FILE/*EL FILE (for .frd).

Example

MCP/CalculiX/examples/cantilever.inp is a public cantilever benchmark (steel C3D8 solid bar, clamped end, transverse tip load). Hand-calc targets at P = 100 N: tip deflection ≈ 0.8 mm, root stress ≈ 140 MPa.

Files

Just SKILL.md in Skill/calculix/calculix-fem of Cai-aa/CAE-Agent-Hub.

Open the folder on GitHubat commit 194ef49

Compare with similar skills

Calculix Fem next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Calculix Fem compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Calculix Fem this skillCai-aa/CAE-Agent-Hub	1k	—	~569	Automated safety check: Pass	MIT	11 days ago
MCP Server Builderanthropics/skills	180k	63 repos	~2.3k	Automated safety check: Pass	Apache-2.0	yesterday
MCP Server BuildershareAI-lab/learn-claude-code	78k	4 repos	~1.2k	Automated safety check: Pass	MIT	13 days ago
MCP Integration for Pluginsanthropics/claude-plugins-official	38k	11 repos	~3.1k	Automated safety check: Pass	Apache-2.0	today
MemPalace Memory SearchMemPalace/mempalace	60k	—	~1.4k	Automated safety check: Pass	MIT	today
Crush Configurationcharmbracelet/crush	29k	—	~3.7k	Automated safety check: Pass	Custom licence	today

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Works with

Model Context Protocol

Questions about Calculix Fem

What does Calculix Fem do?

Workflow skill for driving the CalculiX MCP server over .inp decks — model inspection, in-place design-variable edits, ccx solve, .dat result reading, and resultmesh.json export for the viewer. Calculix Fem is an agent skill from Cai-aa/CAE-Agent-Hub.json export for the viewer.

When should I use Calculix Fem?

Calculix Fem fits situations like: an agent must run an open-source linear-static FEM analysis on CalculiX; tune section/material/load parameters; produce a viewer-renderable result.

How do I install Calculix Fem in Claude Code?

Run `npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a claude-code`. Or copy the skill folder (Skill/calculix/calculix-fem in Cai-aa/CAE-Agent-Hub) into .claude/skills/calculix-fem in your project. Claude Code loads it when a task matches its description.

How do I install Calculix Fem in Codex?

Run `npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a codex`. Or copy the skill folder (Skill/calculix/calculix-fem in Cai-aa/CAE-Agent-Hub) into .agents/skills/calculix-fem in your project. Codex loads it when a task matches its description.

Can I use Calculix Fem in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Cai-aa/CAE-Agent-Hub --skill calculix-fem -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/calculix-fem, .gemini/skills/calculix-fem, .github/skills/calculix-fem and .opencode/skills/calculix-fem in your project.

What does Calculix Fem need to run?

SKILL.md names no scripts, command-line tools or credentials: Calculix Fem is instructions for the agent only.

Does Calculix Fem access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Calculix Fem safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Calculix Fem use?

Calculix Fem is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Calculix Fem use?

About 569 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Calculix Fem?

Skills that share tags, products or a category with Calculix Fem: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars) and MemPalace Memory Search (MemPalace/mempalace, 60k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Calculix Fem?

Cai-aa (a GitHub user) maintains it in Cai-aa/CAE-Agent-Hub, which has 1,015 GitHub stars. The repository holds 57 skills in this directory. The repository was last updated on September 30, 2026.

Source: Cai-aa/CAE-Agent-Hub on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Calculix Fem

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

CalculiX FEM

When to Use

Workflow

Rules

Example

Files

Compare with similar skills

Similar skills

More from Cai-aa/CAE-Agent-Hub

Related

Questions about Calculix Fem