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 skills add AIDotNet/OpenCowork --skill xlsxgit clone --depth 1 https://github.com/AIDotNet/OpenCoworkWrote 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/aidotnet/opencowork/xlsx)<a href="https://agentmods.dev/skills/aidotnet/opencowork/xlsx"><img src="https://agentmods.dev/badge/skills/aidotnet/opencowork/xlsx.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 | $0.00097 | $0.04809 |
| Opus 5 | $0.00048 | $0.02405 |
| Sonnet 5 | $0.00019 | $0.00962 |
| Haiku 4.5 | $0.00010 | $0.00481 |
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 8d 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.
This is a copy
81% identical to xlsx — 292 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 524 lines — stays where its author put it; the contents beside it link to each section on GitHub.
XLSX creation, editing, and analysis
Overview
A user may ask you to create, edit, or analyze the contents of an .xlsx file. You have different tools and workflows available for different tasks.
Must output excel files.
Important Requirements
Python 3 and openpyxl Required for Excel Generation: You can assume Python 3 as the runtime environment. The openpyxl library is required as the primary tool for creating Excel files, managing styles, and writing formulas.
pandas Utilized for Data Processing: You can utilize pandas for efficient data manipulation and processing tasks. The processed data is subsequently exported to the final Excel file through openpyxl.
LibreOffice Required for Formula Recalculation: You can utilize recalc.py for formula check. You can assume LibreOffice is installed for recalculating formula values using the recalc.py script. The script automatically configures LibreOffice on first run.
Requirements for Outputs
All Excel files
Critical Instruction Protocols
Query Decomposition & Verification
Before generating any code, strictly analyze the user's prompt.
- Explicit Requests: Analyze Explicit Needs: Clearly identify the analytical objectives, constraints, required formats, the Excel sheets to be delivered (including sheet names, column definitions, calculation logic, and required metrics), as well as all data fields explicitly requested by the user. These elements define the mandatory delivery scope and specify exactly what must be built in the workbook.
- Implicit Requests:Analyze Implicit Needs: Evaluate the business context, intended users of the Excel file, expected interaction patterns (e.g., filtering, sorting, manual inputs), and downstream use cases such as reporting or decision support. These considerations guide how sheets are structured, formulas are designed, and results are presented to ensure usability and clarity.
- Multi-Part Requests: If the user asks for "two tables", "three scenarios", or "a summary and a detail sheet", you MUST generate ALL requested components.
What ships with it
2 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.
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.
- 8d ago First seen · 524 lines · 97 tokens per session scan A d8e4a4afd3b6
xlsx is a skill published in the GitHub repository AIDotNet/OpenCowork (634 stars, last pushed 5d ago), licensed Apache-2.0. It adds 97 tokens to every session and 4,809 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 81% identical to xlsx, differing in 292 lines, and is treated as a copy.
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