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 shawnstack/quickforge --skill spreadsheetsgit clone --depth 1 https://github.com/shawnstack/quickforgeWrote 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/shawnstack/quickforge/spreadsheets)<a href="https://agentmods.dev/skills/shawnstack/quickforge/spreadsheets"><img src="https://agentmods.dev/badge/skills/shawnstack/quickforge/spreadsheets/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/skills/shawnstack/quickforge/spreadsheets"><img src="https://agentmods.dev/badge/skills/shawnstack/quickforge/spreadsheets.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00058 | $0.01024 |
| Opus 5.5 | $0.00023 | $0.00410 |
| Sonnet 5.5 | $0.00012 | $0.00205 |
| Haiku 4.5 | $0.00006 | $0.00102 |
Grade A, and why
spreadsheets 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 1mo 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 — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spreadsheets skill
Use this skill to create or improve spreadsheet-oriented deliverables. A good spreadsheet is organized, auditable, readable, and fit for the user's purpose. For analysis-heavy tasks, correctness matters as much as formatting.
This QuickForge adaptation intentionally does not depend on Codex cache paths, Codex workspace dependencies, or @oai/artifact-tool. Prefer spreadsheet plans, CSV/TSV outputs, formulas, workbook specs, or Markdown tables first. If the user explicitly needs XLSX generation or editing, explain the available local workflow and ask before using shell commands or external tools.
When to use
Use this skill for requests involving:
- Creating trackers, schedules, budgets, calculators, models, dashboards, reports, or tabular templates.
- Working with
.xlsx,.xls,.csv,.tsv, or Google Sheets-targeted spreadsheet content. - Designing formulas, validations, tables, pivots, charts, or workbook structure.
- Analyzing spreadsheet data or answering questions about provided tabular files.
- Reviewing or improving workbook layout, formulas, assumptions, or data quality.
Spreadsheet principles
- Separate purpose, inputs, calculations, and outputs. For non-trivial workbooks, avoid mixing everything on one sheet.
- Make assumptions visible. Put assumptions near the top or in a dedicated sheet/section.
- Use clear labels and units. Headers should be unambiguous.
- Prefer auditable formulas. Explain formulas and avoid hidden magic.
- Design for maintenance. Tables should be easy to extend.
- Validate important outputs. Include checks for reconciliations, totals, or formula consistency when relevant.
- Use charts only when they add insight. Every chart should have a takeaway.
Recommended workbook structures
Simple tracker/template
- Title and usage note.
- Main table with clear columns.
- Status or category values if useful.
- Summary section only if it helps.
Analysis workbook
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.
- 1mo ago First seen · 125 lines · 58 tokens per session scan A ef3b9f34973f
spreadsheets is a skill published in the GitHub repository shawnstack/quickforge (45 stars, last pushed 2d ago), licensed MIT. It adds 58 tokens to every session and 1,024 once invoked, about $0.0002 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.
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