New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Sheets Artifact

by asgeirtj in asgeirtj/system_prompts_leaks

A skill your agent uses when creating, editing, or inspecting a spreadsheet or workbook (Excel, Google Sheets, or CSV), or when the task calls for a reusable budget, model, tracker, or structured…

CC0-1.0Auto-check passedDocuments & Office

Install Sheets Artifact

skills CLI
$ npx skills add asgeirtj/system_prompts_leaks --skill sheets-artifact -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install asgeirtj/system_prompts_leaks sheets-artifact --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .claude/skills && cp -r skills-src/OpenAI/dots/skills/sheets-artifact .claude/skills/sheets-artifact && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
sheets-artifact
GitHub stars
69k
Token cost
~1.2k tokens
SKILL.md length
612 words
Files
1
Skills in repo
128
Repo updated
First seen
Licence
CC0-1.0

At a glance

A skill your agent uses when creating, editing, or inspecting a spreadsheet or workbook (Excel, Google Sheets, or CSV), or when the task calls for a reusable budget, model, tracker, or structured…

  • Inspecting a spreadsheet
  • SKILL.md covers Reasoning effort for new…, Start with the shared skill, Make and deliver it and Examples
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Workbook (Excel

What it does

Sheets Artifact is an agent skill from asgeirtj/system_prompts_leaks. Use when creating, editing, or inspecting a spreadsheet or workbook (Excel, Google Sheets, or CSV), or when the task calls for a reusable budget, model, tracker, or structured data the user can sort, calculate, or update. Also use for questions that require inspecting an existing workbook; not for quick arithmetic or a small one-off table in chat unless requested as a spreadsheet.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Documents & Office, covering Excel spreadsheets. It works with Google Sheets and Microsoft Excel. The repository describes itself as: Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro… The licence is CC0-1.0.

When your agent uses it

  • Inspecting a spreadsheet
  • Workbook (Excel
  • The task calls for a reusable budget
  • Structured data the user can sort

Example prompts

  • “/sheets-artifact”

What it can do on your machine

Read from SKILL.md and the folder at commit 60d44cc. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Sheets Artifact loads about 1.2k tokens when it runs. Until then it costs about 100 tokens; SKILL.md has 612 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~100
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from asgeirtj/system_prompts_leaks at commit 60d44cc, republished under its CC0-1.0 licence (© asgeirtj). 612 words, ~1,232 tokens.

Download SKILL.mdSave it as .claude/skills/sheets-artifact/SKILL.md (or your agent's skills folder).
name
sheets-artifact
description
Use when creating, editing, or inspecting a spreadsheet or workbook (Excel, Google Sheets, or CSV), or when the task calls for a reusable budget, model, tracker, or structured data the user can sort, calculate, or update. Also use for questions that require inspecting an existing workbook; not for quick arithmetic or a small one-off table in chat unless requested as a spreadsheet.

Spreadsheet Artifacts

Use this for creating, editing or faithfully inspecting a workbook, spreadsheet, model or tracker. A small one-off table or simple calculation can usually stay in chat. A question about an existing workbook does not authorize changing it.

Reasoning effort for new artifacts

When creating a new artifact, explicitly set the subagent's reasoning effort to xhigh.

Start with the shared skill

  • Before reading, extracting, reviewing, creating or editing a spreadsheet, find and follow the shared runtime skill named Spreadsheets. If skills.read is available, use the package listed for that shared skill; do not guess a path or select $orbit:sheets-artifact as the shared skill. Give it the sources, scope, known conventions and output. It owns supported inspection, formula handling, recalculation, quality checks, exports and Google Sheets routing. If it is unavailable, say what is blocked rather than inventing a parallel file workflow.
  • Pass along a supplied template or known conventions such as currencies, fiscal periods and units. Never invent values or preferences. Retrieve inputs or examples when the task needs them; don't routinely scan Drive or Library solely to personalize. Explicit instructions take precedence.

Make and deliver it

  • Honor an explicit format or destination. Keep an existing native spreadsheet in the original unless the user asks for a copy or conversion. For a new workbook, use a supported, clearly established preference; otherwise create a downloadable editable local workbook. Don't substitute CSV or chat text for a requested workbook. Before adding sensitive information to a collaborative original, check who already has access and follow <confirmation_policy> if the data or destination was not authorized.
  • For inspection, use the shared skill's supported read-only route; distinguish formulas, displayed or cached values, missing data and zero, and check relevant sheets or source ranges. For edits, preserve unrelated data and verify dependent formulas; re-read an uncertain write before retrying. Attach the verified workbook when supported, or return a verified Library/download or native link. State what could not be checked and follow <confirmation_policy> before changing access or sending to others.
Show full SKILL.md (329 more words)Show less

Examples

1. A monthly headcount budget

  • User: "Make a headcount budget I can update each month."

  • Action: Build the editable workbook with assumptions and formulas, then change a start date to check the monthly totals.

  • Guidance: Keep assumptions visible and verify that changes flow through the totals.

  • dot:

    text
    "Here's your [headcount budget](LINK_URL). Change a start date and the monthly totals update automatically!"

2. A Q4 total that misses a row

  • User: "Why does the Q4 total look wrong?"
  • Action: Inspect the formula and source ranges without editing.
  • Guidance: Explain the cause. A question about the workbook is not permission to change it.
  • dot: "Whoops, the Q4 formula stops at row 41, so it misses the new row 42. Can I go ahead and fix it?"

3. Two formulas to fix

  • User: "Fix the formulas in the attached workbook and highlight what changed."

  • Action: Fix and highlight the two formulas, preserve unrelated tabs, and verify the dependent totals.

  • Guidance: Check the summary as well as the edited cells before returning the workbook.

  • dot:

    text
    "Fixed the two formulas and highlighted them in the [workbook](LINK_URL). The summary now picks up both new rows."

4. Fresh quotes for a trip budget

  • User: "Update our existing Google Sheets trip budget with the latest quotes."

  • Action: Update the original Sheet with the latest quotes and keep missing prices distinct from zero.

  • Guidance: Use the existing native file. Flag a missing quote rather than making the budget look complete.

  • dot:

    text
    "The latest quotes are in your [trip budget](LINK_URL). The airport transfer price is still missing."

5. Salary data in an agency's tracker

  • User: "Put the salary data in the agency's shared tracker."
  • Action: Check who can access the tracker and which salary data the user authorized for that destination. If the scope is unclear, ask before adding it.
  • Guidance: Follow <confirmation_policy> for the specific data and destination.
  • dot: "The agency can see this tracker. Which salary figures are okay to share with them?"

© asgeirtj, CC0-1.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in OpenAI/dots/skills/sheets-artifact of asgeirtj/system_prompts_leaks.

Open the folder on GitHubat commit 60d44cc

Compare with similar skills

Sheets Artifact next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Sheets Artifact compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sheets Artifact this skillasgeirtj/system_prompts_leaks69k—~1.2kAutomated safety check: PassCC0-1.0
XLSXzzhonglei/GeoCode-Release189—~3.1kAutomated safety check: PassMIT
Spreadsheet Agentmastra-ai/mastra29k—~2.1kAutomated safety check: PassCustom licence
XLSXflonat/flonat-research146—~2.7kAutomated safety check: PassProprietary
Spreadsheet Formula Helpercomposio-community/awesome-codex-skills17k—~328Automated safety check: PassNone
CSV Formula Injectionyaklang/hack-skills2.4k—~1.1kAutomated safety check: PassMIT

Similar skills

  • XLSX

    zzhonglei/GeoCode-Release

    Create, edit, analyze, or convert Excel spreadsheets (.xlsx, .xlsm) where the workbook file is the primary deliverable.

    189 GitHub stars~3.1k tokensUpdated 6 days ago
    Documents & OfficeAuto-check passed

  • Spreadsheet Agent

    mastra-ai/mastra

    Authoring playbook for building agents that read or write tabular data — Google Sheets, Microsoft Excel, CSV, Airtable, Notion databases, or any spreadsheet.

    29k GitHub stars~2.1k tokensUpdated today
    Documents & OfficeAuto-check passed

  • XLSX

    flonat/flonat-research

    Create, read, edit, clean, format, chart, or convert spreadsheet files while preserving spreadsheet-native deliverables.

    146 GitHub stars~2.7k tokensUpdated 11 days ago
    Documents & OfficeAuto-check passed

  • Spreadsheet Formula Helper

    composio-community/awesome-codex-skills

    Write and debug spreadsheet formulas (Excel/Google Sheets), pivot tables, and array formulas; translate between dialects; use when users need working formulas with examples and edge-case checks.

    17k GitHub stars~328 tokensUpdated 2 mo ago
    Documents & OfficeAuto-check passed

  • CSV Formula Injection

    yaklang/hack-skills

    CSV/spreadsheet formula injection (DDE, Excel/LibreOffice, Google Sheets IMPORT).

    2.4k GitHub stars~1.1k tokensUpdated 27 days ago
    Documents & OfficeAuto-check passed

  • Keyword Clustering

    Infrasity-Labs/dev-gtm-claude-skills

    Cluster a list of keywords into topical groups with search intent labels, validated search volume, KD, and CPC data.

    136 GitHub stars~2k tokensUpdated 3 mo ago
    Documents & OfficeAuto-check passed

More from asgeirtj/system_prompts_leaks

All 128 skills in this repo

  • Fleet Manager for Agent Sessions

    asgeirtj/system_prompts_leaks

    Shows one digest of coding-agent sessions across your connected machines and lets you open, read, steer, approve, stop and close them, over Herdr, tmux or MSP.

    69k GitHub stars~2.5k tokensUpdated today
    Auto-check passed

  • Muse Code Product Doctor

    asgeirtj/system_prompts_leaks

    Diagnoses a Muse Code installation's own failures from binary and session evidence, instead of treating the report as an ordinary repository bug.

    69k GitHub stars~3.5k tokensUpdated today
    Auto-check passed

  • DOCX

    asgeirtj/system_prompts_leaks

    A skill your agent uses whenever the user wants to create, read, edit, or manipulate Word documents (.docx) or Word templates (.dotx).

    69k GitHub stars~1.9k tokensUpdated today
    Auto-check passed

  • Agents Project Coordinator

    asgeirtj/system_prompts_leaks

    Runs a goal as a project in which the agent coordinates separate agent threads, judging when to split the work, and interviews you first when nothing can be verified.

    69k GitHub stars~2.9k tokensUpdated today
    Auto-check passed

  • Muse Plugin Creator

    asgeirtj/system_prompts_leaks

    Creates and validates a new native Muse plugin package in the current workspace, limited to five capability families, and leaves installation to you.

    69k GitHub stars~1.8k tokensUpdated today
    Auto-check passed

  • Deep Research

    asgeirtj/system_prompts_leaks

    A skill your agent uses when the user's prompt requires (1) researching a topic across multiple sources, comparing options or alternatives, analyzing trends or history, understanding markets or…

    69k GitHub stars~3.3k tokensUpdated today
    Auto-check passed

Works with

Categories

Questions about Sheets Artifact

What does Sheets Artifact do?

A skill your agent uses when creating, editing, or inspecting a spreadsheet or workbook (Excel, Google Sheets, or CSV), or when the task calls for a reusable budget, model, tracker, or structured…. Sheets Artifact is an agent skill from asgeirtj/system_prompts_leaks. Use when creating, editing, or inspecting a spreadsheet or workbook (Excel, Google Sheets, or CSV), or when the task calls for a reusable budget, model, tracker, or structured data the user can sort, calculate, or update.

When should I use Sheets Artifact?

Sheets Artifact fits situations like: inspecting a spreadsheet; workbook (Excel; the task calls for a reusable budget; structured data the user can sort.

How do I install Sheets Artifact in Claude Code?

Run `npx skills add asgeirtj/system_prompts_leaks --skill sheets-artifact -a claude-code`. Or copy the skill folder (OpenAI/dots/skills/sheets-artifact in asgeirtj/system_prompts_leaks) into .claude/skills/sheets-artifact in your project. Claude Code loads it when a task matches its description.

How do I install Sheets Artifact in Codex?

Run `npx skills add asgeirtj/system_prompts_leaks --skill sheets-artifact -a codex`. Or copy the skill folder (OpenAI/dots/skills/sheets-artifact in asgeirtj/system_prompts_leaks) into .agents/skills/sheets-artifact in your project. Codex loads it when a task matches its description.

Can I use Sheets Artifact in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add asgeirtj/system_prompts_leaks --skill sheets-artifact -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sheets-artifact, .gemini/skills/sheets-artifact, .github/skills/sheets-artifact and .opencode/skills/sheets-artifact in your project.

What does Sheets Artifact need to run?

SKILL.md names no scripts, command-line tools or credentials: Sheets Artifact is instructions for the agent only.

Does Sheets Artifact access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Sheets Artifact safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Sheets Artifact use?

Sheets Artifact is published under the CC0-1.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Sheets Artifact use?

About 1.2k tokens (SKILL.md is roughly 4.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Sheets Artifact?

Skills that share tags, products or a category with Sheets Artifact: XLSX (zzhonglei/GeoCode-Release, 189 stars), Spreadsheet Agent (mastra-ai/mastra, 29k stars), XLSX (flonat/flonat-research, 146 stars) and Spreadsheet Formula Helper (composio-community/awesome-codex-skills, 17k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sheets Artifact?

asgeirtj (a GitHub user) maintains it in asgeirtj/system_prompts_leaks, which has 69,280 GitHub stars. The repository holds 128 skills in this directory. The repository was last updated on October 10, 2026.

Source: asgeirtj/system_prompts_leaks on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.