Artie external plugin

[ArtieReus]

Summary

Changes Made

• Change 1
• Change 2
• Change 3

Related Issues

• Issue 1: [link to issue]

Screenshots (if applicable)

Testing Instructions

1. pnpm i
2. pnpm TASK

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.
• I have created a changeset for my changes.

PR Manifesto

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Latest commit: 6adb28c

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[Copilot]

Pull request overview

This PR adds a proof-of-concept “external plugin” flow by building the apps/template app as a standalone container image and teaching the Greenhouse shell to load a plugin module from a runtime path.

Changes:

• Added a Dockerfile for the Template app and a GitHub Actions workflow to build/push a Template plugin image.
• Injected a PoC Template plugin config into Greenhouse’s plugin registry.
• Extended usePluginLoader to optionally load plugin modules from a provided path and expose a loading error state to the UI.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
apps/template/docker/Dockerfile	Builds a static Template app and serves it via nginx for external-plugin style hosting.
.github/workflows/build-push-template-image.yaml	CI workflow to build/push the Template plugin image to GHCR.
apps/greenhouse/src/routes/__root.tsx	Adds a PoC Template plugin entry into the config received from Kubernetes.
apps/greenhouse/src/hooks/usePluginLoader.ts	Adds optional remote/dynamic module loading and error tracking.
apps/greenhouse/src/components/Extension.tsx	Wires a PoC pluginPath and renders an error state when plugin load fails.

Suppressed comments (3)

apps/greenhouse/src/hooks/usePluginLoader.ts:57

• Remote modules loaded via pluginPath are cached under appName, which can collide with bundled modules (and also makes switching pluginPath versions impossible). A minimal safe approach is to only cache bundled modules until the cache key includes pluginPath.

  // Cache it for next time
  if (module) {
    moduleCache.set(appName, module)
  }

apps/greenhouse/src/hooks/usePluginLoader.ts:96

• usePluginLoader treats a cached bundled module as "already loaded" even when pluginPath is provided, so switching a plugin to load remotely will never call getApp(). If pluginPath is set, ignore the appName-only cache for initial state so the remote module can load.

  // Check if module is already cached - if so, start with it loaded!
  const cachedModule = moduleCache.get(pluginName)
  const [app, setApp] = useState<PluginModule | null>(cachedModule || null)
  const [isLoading, setIsLoading] = useState(!cachedModule) // Only show loading if not cached
  const [error, setError] = useState<Error | null>(null) // NEW

apps/greenhouse/src/hooks/usePluginLoader.ts:114

• If getApp() returns null (unknown plugin or failed remote import with no fallback), the hook currently sets isLoading=false and renders an empty container with no error. Convert a null module into an Error so Extension can show the failure state.

        const appModule = await getApp(pluginName, pluginPath) // Pass pluginPath
        if (!cancelled) {
          setApp(appModule)
          setIsLoading(false)
        }

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