Add pinned shadcn MCP as the v1.2.0 UI registry hub - #3
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One enabled stdio server (shadcn@4.18.0) searches and installs from shadcn-compatible registries. Routing requires search-then-inspect, visual restraint, and a components.json gate. 21st.dev and extra UI MCPs stay out of policy.
Make the MCP config rewrite section-aware so startup_timeout_sec is upserted once and stays idempotent across reinstalls. Fail preflight and doctor unless Node is >=20.18.1 and npx exists, matching shadcn 4.18.0 engines. Treat a missing policy command as MCP_COMMAND_MISSING. Require inspect of file targets and collisions before install, and document that registry search may write components.json.
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Summary
npx -y shadcn@4.18.0 mcp.reference/ui-hub.md): search → inspect → pick one → install. Registries (@shadcn,@animate-ui,@aceternity,@react-bits,@kibo-ui,@magicui) stay behind that hub.components.jsonbefore init/install.Test plan
python3 tests/test-mcp-state.pybash tests/test-source-integrity.shpython3 tests/test-routing-eval.pybash tests/test-doctor-dry-run.shbash tests/test-no-secrets.shbash scripts/ci-gitleaks.shgrok mcp doctor shadcnhealthytestcheck on this PR