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 bighardperson/computer-science-skills-collection --skill excelgit clone --depth 1 https://github.com/bighardperson/computer-science-skills-collectionWrote 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/bighardperson/computer-science-skills-collection/excel)<a href="https://agentmods.dev/skills/bighardperson/computer-science-skills-collection/excel"><img src="https://agentmods.dev/badge/skills/bighardperson/computer-science-skills-collection/excel/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/bighardperson/computer-science-skills-collection/excel"><img src="https://agentmods.dev/badge/skills/bighardperson/computer-science-skills-collection/excel.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00148 | $0.02190 |
| Opus 5.5 | $0.00059 | $0.00876 |
| Sonnet 5.5 | $0.00030 | $0.00438 |
| Haiku 4.5 | $0.00015 | $0.00219 |
Grade A, and why
minimax-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 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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
25 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.
- _skillhub_meta.json 147 B
- references/create.md 24 KB
- references/edit.md 24 KB
- references/fix.md 1.2 KB
- references/format.md 33 KB
- references/ooxml-cheatsheet.md 6.3 KB
- references/read-analyze.md 4.2 KB
- references/validate.md 29 KB
- scripts/formula_check.py 17 KB runs code
- scripts/libreoffice_recalc.py 9.2 KB runs code
- scripts/shared_strings_builder.py 5.1 KB runs code
- scripts/style_audit.py 22 KB runs code
- scripts/xlsx_add_column.py 14 KB runs code
- scripts/xlsx_insert_row.py 9.8 KB runs code
- scripts/xlsx_pack.py 2.9 KB runs code
- scripts/xlsx_reader.py 13 KB runs code
- scripts/xlsx_shift_rows.py 13 KB runs code
- scripts/xlsx_unpack.py 4.7 KB runs code
- templates/minimal_xlsx/_rels/.rels 309 B
- templates/minimal_xlsx/[Content_Types].xml 836 B
- templates/minimal_xlsx/xl/_rels/workbook.xml.rels 862 B
- templates/minimal_xlsx/xl/sharedStrings.xml 1.1 KB
- templates/minimal_xlsx/xl/styles.xml 8.2 KB
- templates/minimal_xlsx/xl/workbook.xml 1.1 KB
- templates/minimal_xlsx/xl/worksheets/sheet1.xml 2.5 KB
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 · 142 lines · 148 tokens per session scan A 4646a04046ca
minimax-xlsx is a skill published in the GitHub repository bighardperson/computer-science-skills-collection (63 stars, last pushed 6mo ago), with no licence file. It adds 148 tokens to every session and 2,190 once invoked, about $0.0006 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.
Other skills, from other repositories
google-workspace-ops
Operate across Google Drive, Docs, Sheets, and Slides as one workflow surface for plans, trackers, decks, and shared documents. Use when the user needs to find, summarize, edit, migrate, or clean up Google Workspace assets without dropping to raw tool calls.
gdoc-to-markdown
Internal fetcher module for Google Docs and Sheets. Fetches content via MCP (preferred, when available), Google API with bearer token or public URL export (fallback), or browser DOM extraction via Claude in Chrome (last resort) and returns Markdown. Used by /bedrock:teach and /bedrock:sync — not intended for direct…
spreadsheet-analysis
Inspect, profile, clean, reconcile, analyze, visualize, and verify spreadsheet data while preserving formulas, formatting, types, and source files. Use when working with .xlsx, .xlsm, .xls, .ods, .csv, or .tsv files; answering questions from a workbook; auditing formulas or data quality; comparing sheets or versions…
board-communication
Professional board reporting, financial presentation, compliance documentation, and resident communication.
monthly-close-checklist-and-reconciliation-prep
A bookkeeping preparation skill that turns a pasted bank export or transaction list into a monthly-closing checklist, draft categories with disputed items marked, and a summary for an accountant or investor.
survey-results-analyzer
Analyze survey CSV files and extract quantitative frequencies, qualitative themes, and Top-3 insights. No Python required — Cowork-native. Use when reviewing Google Forms/Typeform/SurveyMonkey exports, preparing stakeholder reports, or turning raw survey data into actionable findings. Triggers: 'analyze survey…