OpenGolem: Skill for Claude Code

.claude/skills/xlsx/SKILL.md

xlsx is a skill for Claude Code from luckeyfaraday/OpenGolem. It costs 44 tokens per session (1,036 once invoked), scanned A, original, MIT.

A tool for creating and editing Excel workbook files (.xlsx) from structured information, including styled sheets and formulas.

In plain words
What is it for?
Use it to generate corporate workbooks with cover sheets, filtered data tables, formulas, notes, and consistent page settings.
Why use it?
It helps preserve a workbook template’s formatting and recalculate formulas when needed.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths.

This is luckeyfaraday/OpenGolem's own configuration. It tells Claude Code how to work on OpenGolem itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything OpenGolem configures →

Reuse

Borrowing it

Nothing to install: this file belongs to luckeyfaraday/OpenGolem. 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/luckeyfaraday/OpenGolem/main/.claude/skills/xlsx/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/luckeyfaraday/OpenGolem

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.

agentmods badge for xlsx

README.md
[![agentmods](https://agentmods.dev/badge/skills/luckeyfaraday/opengolem/xlsx.svg)](https://agentmods.dev/skills/luckeyfaraday/opengolem/xlsx)
Your own site
<a href="https://agentmods.dev/skills/luckeyfaraday/opengolem/xlsx"><img src="https://agentmods.dev/badge/skills/luckeyfaraday/opengolem/xlsx.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,036 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 $0.00044 $0.01036
Opus 5 $0.00022 $0.00518
Sonnet 5 $0.00009 $0.00207
Haiku 4.5 $0.00004 $0.00104

Measured 7d ago against content hash 0f731a2d8589, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

xlsx 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 7d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (recalc.py, scripts/generate_corporate_xlsx.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/skills/xlsx/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SKILL.md — /xlsx Corporate Workbook Generator

What It Does

Generates professional Excel workbooks (.xlsx) from structured input. Output is generated from the reference template at: .claude/skills/xlsx/templates/reference.xlsx

How to Invoke

/xlsx [workbook title] — [brief description of the workbook, sheets, and data it should contain]

The agent will generate a complete corporate workbook and recalculate formulas when needed.


Output

  • File: output/[title]_YYYY-MM-DD.xlsx
  • Format: Corporate workbook with a cover sheet plus styled data sheets
  • Template: Loads .claude/skills/xlsx/templates/reference.xlsx directly and preserves its workbook styles, page setup, sheet layout, and header/footer behavior

Workbook Structure

Every generated workbook follows this structure:

1. COVER
   ├── Workbook title
   ├── Subtitle (if applicable)
   ├── Prepared by
   ├── Date
   ├── Classification
   └── Sheet index / notes

2. WORKSHEETS
   ├── Sheet title row
   ├── Header row with filters
   ├── Data rows
   └── Optional formulas / notes

Formatting Standards

  • Template authority: The reference workbook controls the visual system
  • Headers: Dark fill, white bold text
  • Body cells: Clean corporate formatting
  • Hardcoded inputs: Blue text
  • Formulas: Black text
  • Negative values: Prefer number formats with parentheses where appropriate
  • Freeze panes: Header row remains visible
  • Filters: Enabled on header rows

Generation Script

Use the provided generator: .claude/skills/xlsx/scripts/generate_corporate_xlsx.py

python3 .claude/skills/xlsx/scripts/generate_corporate_xlsx.py \
  --title "Fuel Oil Market Workbook" \
  --subtitle "Q1 2026 Benchmark Review" \
  --date "April 2026" \
  --classification "CONFIDENTIAL" \
  --prepared-by "BedRock AI Research" \
  --output output/fuel_oil_workbook.xlsx \
  --sheets-json '[
    {
      "name": "Key Metrics",
      "description": "Top-line findings and benchmark statistics",
      "headers": ["Metric", "Value", "Notes"],
      "rows": [
        ["MOC Window", "30 minutes", "Platts closing window"],
        ["Settlement", 1100000000, "2022 Glencore resolution"],
        ["Coverage", "=COUNTA(A4:A5)", "Formula example"]
      ]
    },
    {
      "name": "Trade Log",
      "description": "Observed transactions and flags",
      "headers": ["Date", "Counterparty", "Volume", "Flag"],
      "rows": [
        ["2026-03-01", "Firm A", 42000, "Review"],
        ["2026-03-02", "Firm B", 38000, "Escalate"]
      ]
    }
  ]'

Read the full file on GitHub · 150 lines

Files

What ships with it

4 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. 7d ago First seen · 150 lines · 44 tokens per session scan A 0f731a2d8589

Subscribe to this mod's changes

xlsx is a skill published in the GitHub repository luckeyfaraday/OpenGolem (6 stars, last pushed 5mo ago), licensed MIT. It adds 44 tokens to every session and 1,036 once invoked, about $0.0002 per session on Opus 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 2026-08-31.