Anthropic's official spreadsheet skill: build .xlsx workbooks with real formulas, formatting, multiple sheets and charts, or analyse and modify existing spreadsheets.
skillgild install xlsx
License: Source-available · Created by Anthropic · The project lists support for Claude Code, Claude.ai (built in), Claude API
A community skill: it installs from its own repository and your agent runs the project's instructions locally with your own model. SkillGild lists it and credits the author; nothing runs on SkillGild.
With the SkillGild CLI (needs git). It clones anthropics/skills and copies the skill folder into the right place for your agent; use --agent codex, cursor or gemini-cli for other clients.
skillgild install xlsx --agent claude-codeClaude Code plugin marketplace.
/plugin marketplace add anthropics/skills
/plugin install document-skills@anthropic-agent-skillsManual copy.
Clone anthropics/skills and copy skills/xlsx into ~/.claude/skills/xlsx (respect the license)Or copy the folder yourself from anthropics/skills (folder skills/xlsx) into ~/.claude/skills/xlsx/ for Claude Code, ~/.agents/skills/ for Codex, ~/.cursor/skills/ for Cursor or ~/.gemini/skills/ for Gemini CLI, then start a new session.
Requests that trigger this skill once it is installed in your agent.
Build a 12-month budget model with formulas
Add a summary sheet with pivots to sales.xlsx
Clean this CSV into a formatted workbook
Run skillgild install xlsx --agent claude-code: the SkillGild CLI clones anthropics/skills and copies the skill folder into ~/.claude/skills/xlsx. You can also use the project's own commands shown above, or copy the folder yourself. Use --agent codex, cursor or gemini-cli for other clients.
Excel (xlsx) skill is one of Anthropic's document skills, which are source-available rather than open source: you can install and use them, but not redistribute them. SkillGild links to the source and does not host a copy.
The project lists Claude Code, Claude.ai (built in), Claude API. It is a plain Agent Skills folder (SKILL.md plus supporting files), so any client that reads that format can load it.
No. Excel (xlsx) skill is a community skill: your agent runs its instructions locally with your own model, and SkillGild lists, credits and installs it. Hosted SkillGild skills are marked differently and run through the SkillGild MCP server.
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