react19-upgrade plugin
Enterprise React 19 migration toolkit with specialized agents and skills for upgrading React 18 codebases to React 19. Includes auditor, dependency surgeon, source code migrator, and test guardian. Handles removal of deprecated APIs including ReactDOM.render, forwardRef, defaultProps, legacy context, string refs, and more.
How to install the react19-upgrade plugin
Run both commands inside Claude Code. The first adds the marketplace once; the second installs the plugin.
/plugin marketplace add gbb-acelerators/awesome-harness-primitives
/plugin install react19-upgrade@copilot-primitives-claudeWhat's inside react19-upgrade
8 parts read from the plugin's own files.
Agents 5
Call as @agent-react19-upgrade:name- @agent-react19-upgrade:react19-auditor
No description in the file.
- @agent-react19-upgrade:react19-commander
No description in the file.
- @agent-react19-upgrade:react19-dep-surgeon
No description in the file.
- @agent-react19-upgrade:react19-migrator
No description in the file.
- @agent-react19-upgrade:react19-test-guardian
No description in the file.
Skills 3
Claude loads it when the task matches- react19-concurrent-patterns
No description in the file.
- react19-source-patterns
No description in the file.
- react19-test-patterns
No description in the file.
Using react19-upgrade in Claude Code
Ask for an agent by name:
@agent-react19-upgrade:react19-auditor
@agent-react19-upgrade:react19-commanderSkills need no command. Claude reads them when your request matches what they describe.
Update, turn off or remove
- Update the plugin (shell)
- claude plugin update react19-upgrade@copilot-primitives-claude
- Refresh the marketplace
- /plugin marketplace update copilot-primitives-claude
- Turn it off for now
- /plugin disable react19-upgrade@copilot-primitives-claude
- Remove it
- /plugin uninstall react19-upgrade@copilot-primitives-claude
react19-upgrade plugin questions
How do I install the react19-upgrade plugin?
In Claude Code run /plugin marketplace add gbb-acelerators/awesome-harness-primitives, then /plugin install react19-upgrade@copilot-primitives-claude.
What does the react19-upgrade plugin include?
react19-upgrade bundles 5 agents, 3 skills.
Which agents come with react19-upgrade?
react19-auditor, react19-commander, react19-dep-surgeon, react19-migrator, react19-test-guardian. Call one with @agent-react19-upgrade:react19-auditor.
How do I update or remove the react19-upgrade plugin?
Update it with claude plugin update react19-upgrade@copilot-primitives-claude in your shell, or from the Installed tab of /plugin. Remove it with /plugin uninstall react19-upgrade@copilot-primitives-claude.