What is LumericalFDTD-skill CLAUDE.md?

A set of Claude Code instructions for automating Lumerical FDTD work, a computer simulation method for studying how light behaves in structures. It covers modelling, simulation, results analysis, paper summaries, and slash commands for each stage.

Use it to create FDTD models, run simulations, debug them, extract results, calculate metrics, make plots, or produce structured Chinese summaries of research papers.

It gives the coding agent a defined workflow for the simulation process instead of requiring you to coordinate every stage manually. It also documents how the plugin itself is organised.

How Lex669/LumericalFDTD-skill configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Lex669/LumericalFDTD-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Lex669/LumericalFDTD-skill/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Lex669/LumericalFDTD-skill

Made for: Claude Code.

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.

README.md

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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.

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Per session 1,656 This file is loaded in full into every session.

When invoked 1,656 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.01656	$0.01656
Opus 5.5	$0.00662	$0.00662
Sonnet 5.5	$0.00331	$0.00331
Haiku 4.5	$0.00166	$0.00166

Measured 2mo ago against content hash 055215366eb4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

LumericalFDTD-skill CLAUDE.md 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 2mo 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.

CLAUDE.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

This is a Claude Code Plugin

This repo defines the LumericalFDTD plugin with 5 skills and 4 slash commands:

Skill	用途
LumericalFDTD	FDTD 全流程自动化 — 建模→仿真→分析→验收，端到端流水线
LumericalFDTD-modeling	FDTD 结构建模 — 几何、材料、光源、监视器，输出建模脚本
LumericalFDTD-simulation	FDTD 仿真执行 — 运行、自动debug、结果提取，输出 .fsp/.npz
LumericalFDTD-analysis	FDTD 数据分析 — 读取 .npz、计算指标、绘图，输出 .png
paper-summarizer	学术论文深度总结 — 结构化中文报告，逐图逐表详细解释

Command	说明
`/fdtd-model`	触发 LumericalFDTD-modeling — 仅建模
`/fdtd-simulate`	触发 LumericalFDTD-simulation — 仅仿真
`/fdtd-analyze`	触发 LumericalFDTD-analysis — 仅分析
`/fdtd-full`	触发 LumericalFDTD — 全流程

There is no build, lint, test suite, or traditional CI pipeline. "Development" means editing skill files (skills/*/SKILL.md), command files (commands/*.md), and reference files (skills/*/references/).

Architecture

.claude-plugin/
  plugin.json                         # Plugin manifest — 注册所有 skills 和 commands
commands/
  fdtd-model.md                       # /fdtd-model 命令
  fdtd-simulate.md                    # /fdtd-simulate 命令
  fdtd-analyze.md                     # /fdtd-analyze 命令
  fdtd-full.md                        # /fdtd-full 命令
skills/
  LumericalFDTD/
    SKILL.md                          # FDTD 全流程 skill 定义
    references/
      building-blocks.md              # 几何结构、光源、监视器、网格覆盖
      api-reference.md                # 会话管理、SimObject、数据传递、lumopt
      common-errors.md                # 已知 Lumerical API 陷阱（按错误类型分类）
      diffraction.md                  # 孔衍射、Airy环、近场/远场分析
    scripts/
      template.py                     # 仿真脚本骨架模板
    assets/                           # (预留)
  LumericalFDTD-modeling/
    SKILL.md                          # FDTD 建模 skill 定义
  LumericalFDTD-simulation/
    SKILL.md                          # FDTD 仿真执行 skill 定义
  LumericalFDTD-analysis/
    SKILL.md                          # FDTD 数据分析 skill 定义
  paper-summarizer/
    SKILL.md                          # 论文总结 skill 定义
    references/
      output-template.md              # 中文输出报告模板
      chart-analysis.md               # 各类型图表分析方法论

Read the full file on GitHub · 92 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.

2mo ago Changed · +36 tokens per session 055215366eb4
2mo ago First seen · 92 lines · 1,620 tokens per session scan A 1eacf7826b46

Subscribe to this mod's changes

LumericalFDTD-skill CLAUDE.md is an instructions file published in the GitHub repository Lex669/LumericalFDTD-skill (44 stars, last pushed 13d ago), licensed MIT. It adds 1,656 tokens to every session, about $0.0066 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 2026-08-30.

Scientific

LumericalFDTD-skill CLAUDE.md next to 6 instructions from other repositories
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LumericalFDTD-skill: Instructions file for Claude Code