Add Claude Code plugin configuration for analysis tools

[MaxGhenis]

Summary

This PR adds policyengine-claude plugin configuration to enable automated installation of skills for PolicyEngine analysis workflows.

Changes

• ✅ Add plugin auto-install configuration in .claude/settings.json
• ✅ Configure auto-install of analysis-tools plugin from PolicyEngine/policyengine-claude

What's Included

The analysis-tools plugin provides 3 skills (reference documentation):

1. policyengine-us-skill

• Situation creation patterns (single, married, families)
• Common variables reference (income, deductions, benefits, taxes)
• Using axes for parameter sweeps
• Policy reform definitions
• Helper functions and examples

2. policyengine-analysis-skill

• Impact analysis patterns (distributional, case studies)
• Plotly visualizations with PolicyEngine branding (teal #39C6C0)
• Streamlit dashboard templates
• Jupyter notebook best practices
• Reform analysis code templates

3. policyengine-standards-skill

• Python standards (Black, 79-char, uv run)
• React standards (Prettier + ESLint)
• Changelog management (changelog_entry.yaml)
• Git workflow best practices
• Common AI pitfalls

Benefits

For Analysis Work

• ✅ Reference documentation - Claude automatically knows PolicyEngine patterns
• ✅ Best practices - Consistent code quality and visualization standards
• ✅ Faster development - Templates and examples for common analysis tasks
• ✅ Team standardization - Everyone uses the same patterns

How It Works

Skills are automatically loaded by Claude when relevant. For example:

You: "Create a Streamlit dashboard analyzing CTC reform impacts"

Claude: [Uses policyengine-analysis-skill for dashboard patterns]
        [Uses policyengine-us-skill for simulation setup]
        [Uses policyengine-standards-skill for code quality]

Installation

Automatic (Recommended)

When you trust this repo in Claude Code, the plugin auto-installs!

Manual (Optional)

/plugin marketplace add PolicyEngine/policyengine-claude
/plugin install analysis-tools@policyengine-claude

Testing

After merging:

1. Team members trust the repo in Claude Code
2. Plugin auto-installs from marketplace
3. Skills are automatically available when working on analysis
4. Try asking Claude to create analysis code and observe it using the skill patterns

Related

• Plugin Repository: https://github.com/PolicyEngine/policyengine-claude
• Country model PRs: Migrate from .claude submodule to policyengine-claude plugin policyengine-us#6692, Add Claude Code plugin configuration policyengine-uk#1362

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🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com