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/xlsx-tool-operationsnpx skills add cxcscmu/SkillLearnBench --skill xlsx-tool-operationsgit 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/xlsx-tool-operations)<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/xlsx-tool-operations"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/xlsx-tool-operations.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 5.1 | $0.00023 | $0.01185 |
| Opus 5 | $0.00012 | $0.00593 |
| Sonnet 5 | $0.00005 | $0.00237 |
| Haiku 4.5 | $0.00002 | $0.00119 |
Grade A, and why
xlsx-tool-operations 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 — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
XLSX Tool Operations
Overview
The xlsx skill tool allows programmatic interaction with Excel files, enabling reading, writing, and analyzing spreadsheet data without manually opening files.
Common Operations
Reading Spreadsheet Data
Use the xlsx skill to:
- Examine sheet structure and contents
- Understand data layout and ranges
- Identify cell references and formulas
- Analyze existing data before writing formulas
Pattern:
Skill: xlsx
Operation: read or get_data
File: path/to/file.xlsx
Sheet: "SheetName"
Range: optional specific range like A1:Z100
Writing Formulas to Cells
Use the xlsx skill to:
- Add formulas to specific cells
- Write values to cells
- Batch update multiple cells
- Preserve existing formatting
Pattern:
Skill: xlsx
Operation: write_cell or batch_write
File: path/to/file.xlsx
Sheet: "SheetName"
Target: Single cell reference (A1) or range (A1:A10)
Value: Formula starting with = or literal value
Options: Preserve formatting, overwrite mode
Working with Multiple Sheets
Reference sheets by name when:
- Reading from source data sheet and writing to results sheet
- Using cross-sheet formulas (SheetName!CellRef)
- Analyzing relationships between sheets
Cross-sheet formula pattern:
=Sheet1!A1 (reference cell in another sheet)
='Sheet Name'!A1 (if sheet name has spaces)
Range Operations
Single Row/Column:
H12 (single cell)
H12:L12 (row range, 5 columns)
H12:H40 (column range, multiple rows)
Multiple Ranges:
H12:L17, H19:L24, H26:L31 (list separate ranges)
2D Range with formulas:
H12:L17 contains 6 rows × 5 columns = 30 cells
Fill with formula that references row/column criteria
Specific Patterns for This Task
Two-Condition Lookup Pattern
When filling ranges based on two criteria (Series Code in column, Year in row):
Formula template:
=INDEX(lookup_source_range, MATCH(row_series_code, lookup_column, 0), MATCH(header_year, lookup_row, 0))
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 · 173 lines · 23 tokens per session scan A 91543cc10bc5
xlsx-tool-operations is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 1mo ago), licensed MIT. It adds 23 tokens to every session and 1,185 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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