How Agents Should Retrieve UI Component Source Safely

Giving a coding agent access to component source should not mean allowing it to copy arbitrary code from an unreviewed URL. A useful registry makes the source, dependencies, and expected changes clear before anything is written into a project.

Use a Trusted Component Manifest

The registry should return a specific item rather than an unbounded search result from the web.

{
  "name": "confirm-dialog",
  "version": "1.2.0",
  "source": "registry/components/confirm-dialog.tsx",
  "dependencies": ["@radix-ui/react-dialog"],
  "files": ["confirm-dialog.tsx", "use-confirm-dialog.ts"],
  "checksum": "sha256:..."
}

This makes the retrieval request auditable. The agent knows which files it is allowed to add and which dependencies need review.

Resolve Dependencies Before Writing Files

An agent should inspect the component’s dependency graph before installation. For a modal, that might include a focus management primitive or an icon package. For a data table, it might include a table utility and pagination controls.

1. Read the registry item.
2. Compare required dependencies with the target project.
3. Show the files and package changes.
4. Write the source only after the plan is accepted.
5. Run type, build, and accessibility checks.

This protects the project from surprising configuration changes and gives a reviewer a concise record of what the agent did.

Keep Installation Scoped

A component installer should not overwrite global styles, rewrite unrelated configuration, or silently replace an existing component. Prefer explicit targets and fail when a file collision needs a human decision.

if (targetFileExists && !request.overwrite) {
  throw new Error('Component target already exists. Review the diff before replacing it.')
}

The goal is not to make installation frictionless at any cost. It is to make reuse predictable enough that an agent can move quickly without hiding risk.

Validate the Installed Pattern

After retrieval, check that the component still matches the product. Confirm its labels, focus behavior, breakpoints, and dependencies. A trusted source is a starting point; it is not proof that the component is appropriate for every screen.