Migrate test files to React 19 compatibility by applying before/after patterns for act() imports, Simulate removal, and StrictMode call count changes.
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npx claudepluginhub simplycubed/skills --plugin react19-test-patternsVisual whiteboard collaboration — opens an interactive whiteboard in your browser, Copilot sees your drawings and responds. NOTE: Copilot CLI only — this plugin uses Copilot CLI plugin structure (.github/plugin/plugin.json) which Claude Code does not discover.
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