fenics-fem

fenics-fem is a skill for Claude Code, Codex from xjtulyc/awesome-rosetta-skills. It costs 53 tokens per session (6,002 once invoked), scanned A, original, no licence file.

A toolkit for solving partial differential equations, which describe how physical quantities change across space, with the finite element method. It uses FEniCS or dolfinx, meshes made with gmsh, and can export results for ParaView.

In plain words
What is it for?
Use it for problems such as heat flow, fluid behavior, or elasticity, including mesh creation, Poisson and elasticity equations, boundary conditions, and result export.
Why use it?
It helps turn a physical problem into equations, boundary conditions, and a computer simulation without handling every numerical detail by hand.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it for problems such as heat flow, fluid behavior, or elasticity, including mesh creation, Poisson and elasticity equations, boundary conditions, and result export.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xjtulyc/awesome-rosetta-skills/fenics-fem
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 xjtulyc/awesome-rosetta-skills --skill fenics-fem
Clone the repo
git clone --depth 1 https://github.com/xjtulyc/awesome-rosetta-skills

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 fenics-fem

README.md
[![agentmods](https://agentmods.dev/badge/skills/xjtulyc/awesome-rosetta-skills/fenics-fem/github.svg)](https://agentmods.dev/skills/xjtulyc/awesome-rosetta-skills/fenics-fem)
Your own site
<a href="https://agentmods.dev/skills/xjtulyc/awesome-rosetta-skills/fenics-fem"><img src="https://agentmods.dev/badge/skills/xjtulyc/awesome-rosetta-skills/fenics-fem/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 fenics-fem

Your own site · 80×15
<a href="https://agentmods.dev/skills/xjtulyc/awesome-rosetta-skills/fenics-fem"><img src="https://agentmods.dev/badge/skills/xjtulyc/awesome-rosetta-skills/fenics-fem.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 6,002 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 unknown 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 $0.00053 $0.06002
Opus 5 $0.00026 $0.03001
Sonnet 5 $0.00011 $0.01200
Haiku 4.5 $0.00005 $0.00600

Measured 12d ago against content hash 7583f67a2515, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

fenics-fem 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 12d 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.

| Nédélec (edge elements) | `("Nedelec1st", 1)` | Electromagnetics, H(curl) |
skills/01-physics/fenics-fem/SKILL.md · 643 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 12d ago First seen · 643 lines · 53 tokens per session scan A 7583f67a2515

Subscribe to this mod's changes

fenics-fem is a skill published in the GitHub repository xjtulyc/awesome-rosetta-skills (34 stars, last pushed 5mo ago), with no licence file. It adds 53 tokens to every session and 6,002 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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