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 lfyxhappy/lfcode --skill spreadsheet-analystgit clone --depth 1 https://github.com/lfyxhappy/lfcodeWrote 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/lfyxhappy/lfcode/spreadsheet-analyst)<a href="https://agentmods.dev/skills/lfyxhappy/lfcode/spreadsheet-analyst"><img src="https://agentmods.dev/badge/skills/lfyxhappy/lfcode/spreadsheet-analyst.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 | $0.00059 | $0.00347 |
| Opus 5 | $0.00030 | $0.00173 |
| Sonnet 5 | $0.00012 | $0.00069 |
| Haiku 4.5 | $0.00006 | $0.00035 |
Grade A, and why
spreadsheet-analyst 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.
What it actually says
Spreadsheet Analyst
Treat cells, formulas, formatting, and hidden sheets as part of the workbook contract.
Workflow
- Identify input and output files, sheet names, tables, row counts, headers, types, formulas, named ranges, hidden content, and requested metrics.
- Inspect a safe sample and workbook structure before loading or rewriting everything. Check the available local CSV/XLSX parser, calculation engine, and renderer.
- Preserve the original and document assumptions about missing values, dates, currencies, duplicates, delimiters, and formula recalculation.
- Apply transformations deterministically. Keep formulas when requested, avoid converting identifiers or dates silently, and do not invent values for missing data.
- Validate row and column counts, key uniqueness, formula errors, independent aggregates, representative cell values, and output openability. Render important sheets when a renderer is available.
- Summarize methodology, assumptions, changed sheets, output location, and limitations separately from factual results.
Boundaries
- Do not overwrite the only workbook, disclose sensitive rows, or remove hidden sheets and formulas without explicit instruction.
- Do not present a calculated result as authoritative when the calculation engine or source data is incomplete.
- Redact personal, financial, and credential-like data from logs and examples.
Completion check
Confirm the exact output, validation evidence, formula or formatting fidelity, and every assumption that affects interpretation.
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 · 28 lines · 59 tokens per session scan A 3f77797b3ac1
spreadsheet-analyst is a skill published in the GitHub repository lfyxhappy/lfcode (2 stars, last pushed 4d ago), licensed MIT. It adds 59 tokens to every session and 347 once invoked, about $0.0003 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 2026-09-05.
Other skills, from other repositories
Spreadsheets
Create, edit, analyze, and verify standalone spreadsheet files or Google Sheets-ready workbooks, including .xlsx, .xls, .csv, and .tsv. Do not use for live controlling Microsoft Excel app or a live Excel session.
feishu-bitable
A skill for managing Feishu Bitable, a database-like spreadsheet for organising structured records. It supports tables, fields, views, filters, and bulk changes.
Gmail, Google Calendar, Drive, Docs, Sheets and Contacts for a connected Google account: read and search mail, send and reply, book and move meetings, find files, read and write Docs and Sheets, look people up. Use whenever the user mentions their email, inbox, calendar, meetings, Drive, a Google Doc or Sheet.
excel-live-control
Control an open or active Microsoft Excel workbook through the ChatGPT add-in or connected session. Use when the user tags the Microsoft Excel app in Codex or follows up on an established live Excel task. Do not use for standalone spreadsheet files or Google Sheets.
strategy-decompose
Decompose a strategy handed down from above into a hierarchy of aspects and states, audit it for necessity, sufficiency and overlap, and output it as an xlsx. Use before writing your own team's or unit's policy from a company/department/team strategy, when the user wants to break a strategy down into "what state we…
xlsx
Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify…