Add ui-kit maintenance skill for legacy compatibility patterns by policyengine[bot] · Pull Request #138 · PolicyEngine/policyengine-claude

policyengine · 2026-05-09T13:06:19Z

Summary

Captures patterns learned from reviewing policyengine-ui-kit #28 (legacy compatibility shim for design-system migration).

What's added

New skill: policyengine-ui-kit-maintenance

Documents:

Legacy compatibility shim pattern (when deprecating old APIs)
Multi-entry TypeScript builds with Vite
package.json exports configuration for subpath imports
Deprecation strategy and timeline
Test porting for behavioral parity verification

Why this helps

Future sessions working on ui-kit will know:

How to create /legacy export paths for zero-code consumer migrations
How to configure Vite for multi-entry builds (ESM + CJS + types)
When to use compatibility shims vs direct breaking changes
How to verify behavioral parity by porting original tests

Context

PR #28 in policyengine-ui-kit created @policyengine/ui-kit/legacy/* exports mirroring the deprecated @policyengine/design-system API. This enables 18 downstream repos to migrate with pure import-path renames.

The pattern is reusable for future API migrations across PolicyEngine packages.

🤖 Generated with Claude Code

Captures learnings from policyengine-ui-kit PR #28 (legacy shim): - How to create backward-compatible /legacy export paths - Multi-entry TypeScript builds with Vite - Deprecation strategy and timeline - Test porting for behavioral parity - package.json exports best practices This will help future maintainers create similar compatibility layers when migrating design system APIs. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>

policyengine · 2026-05-09T13:07:09Z

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policyengine Bot commented May 9, 2026

Summary

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Context

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