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.
npx agentmods add skills/cxcscmu/skilllearnbench/excel-xlsx-skillnpx skills add cxcscmu/SkillLearnBench --skill excel-xlsx-skillgit clone --depth 1 https://github.com/cxcscmu/SkillLearnBenchWrote 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.
[](https://agentmods.dev/skills/cxcscmu/skilllearnbench/excel-xlsx-skill)<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/excel-xlsx-skill"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/excel-xlsx-skill.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00027 | $0.00742 |
| Opus 5 | $0.00014 | $0.00371 |
| Sonnet 5 | $0.00005 | $0.00148 |
| Haiku 4.5 | $0.00003 | $0.00074 |
Grade A, and why
excel-xlsx-skill 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Excel XLSX Skill Tool
Overview
The xlsx skill is used to work with Excel spreadsheets (.xlsx, .xlsm, .csv, .tsv). It supports creating spreadsheets, reading data, modifying cells, adding formulas, and data analysis.
When to Use
- Creating new spreadsheets from scratch
- Reading or analyzing existing spreadsheet data
- Modifying cells while preserving existing formulas and formatting
- Adding formulas and performing calculations
- Analyzing data and creating visualizations
Setup
The xlsx skill is built-in and available through the Skill tool. No installation required.
Usage Patterns
Reading a Spreadsheet
Read the file 'data.xlsx' and understand the structure
Invoke the xlsx skill with operation: read
Modifying Cells
To set a formula in a cell:
Use xlsx skill with operation: write_cell
Specify: file path, sheet name, cell reference, value/formula
To modify multiple cells:
Use xlsx skill with operation: batch_write
Working with Formulas
When adding formulas to Excel:
- Use cell references like A1, B2:B10
- Use sheet references like Sheet1!A1
- Formulas start with
= - For multi-sheet references: ='SheetName'!CellRef
Key Functions to Know
-
VLOOKUP: Lookup values in a vertical table
=VLOOKUP(lookup_value, table_array, col_index_num, [range_lookup]) -
HLOOKUP: Lookup values in a horizontal table
=HLOOKUP(lookup_value, table_array, row_index_num, [range_lookup]) -
INDEX & MATCH: More flexible lookup
=INDEX(return_array, MATCH(lookup_value, lookup_array, 0)) -
XLOOKUP: Modern Excel function (Excel 365+)
=XLOOKUP(lookup_value, lookup_array, return_array, [if_not_found], [match_mode], [search_mode])
Statistical Functions
=MIN(range)- Minimum value=MAX(range)- Maximum value=MEDIAN(range)- Median value=AVERAGE(range)- Mean value=PERCENTILE(range, k)- kth percentile (k as decimal, e.g., 0.25 for 25th)=SUMPRODUCT(array1, array2)- For weighted calculations
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.
- 2d ago First seen · 90 lines · 27 tokens per session scan A 67de719e25d2
excel-xlsx-skill is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 1mo ago), licensed MIT. It adds 27 tokens to every session and 742 once invoked, about $0.0001 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 2026-09-03.
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TypeScript 인터페이스 순서 기반 xlsx 엑셀 다운로드 구현
사용자가 정의한 TypeScript 인터페이스의 속성 순서를 기준으로 데이터 배열을 변환하고, xlsx 라이브러리를 사용하여 엑셀 파일로 다운로드하는 함수를 작성합니다.