Excel Master
OfficialFreeComprehensive Excel spreadsheet toolkit with zero-tolerance for formula errors. Create professional spreadsheets using o
Free · Opens the source repo
What Excel Master does
Comprehensive Excel spreadsheet toolkit with zero-tolerance for formula errors. Create professional spreadsheets using openpyxl with proper formulas (never hardcoded values), industry-standard color coding (blue for inputs, black for formulas, green for sheet links, red for external links), and precise number formatting. Build financial models with assumptions placement, error prevention strategies, and source documentation. Analyze data using pandas for complex data manipulation and visualization. Edit existing files while preserving formulas and formatting. Includes mandatory LibreOffice-based formula recalculation with detailed error reporting (#REF!, #DIV/0!, #VALUE!, #NAME?, #N/A detection). Features comprehensive formula verification checklist, best practices for both libraries, and specific guidelines for financial modeling conventions.
How to install Excel Master
1. Install with the skills CLI
npx skills add --agent claude-code2. Or install it manually
Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.
Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs
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