refactor(install): prefer native plugin install across targets (#609)

Co-authored-by: John Cavanaugh <cavanaug@users.noreply.github.com>

tests/claude-parser.test.ts

@@ -6,6 +6,7 @@ import { loadClaudePlugin } from "../src/parsers/claude"
 import { filterSkillsByPlatform } from "../src/types/claude"
 
 const fixtureRoot = path.join(import.meta.dir, "fixtures", "sample-plugin")
+const compoundPluginRoot = path.join(import.meta.dir, "..", "plugins", "compound-engineering")
 const mcpFixtureRoot = path.join(import.meta.dir, "fixtures", "mcp-file")
 const customPathsRoot = path.join(import.meta.dir, "fixtures", "custom-paths")
 const invalidCommandPathRoot = path.join(import.meta.dir, "fixtures", "invalid-command-path")
@@ -32,6 +33,14 @@ async function makeMinimalPluginRoot(): Promise<string> {
 }
 
 describe("loadClaudePlugin", () => {
+  test("current compound-engineering plugin ships skills and agents but no source commands", async () => {
+    const plugin = await loadClaudePlugin(compoundPluginRoot)
+
+    expect(plugin.commands).toHaveLength(0)
+    expect(plugin.skills.length).toBeGreaterThan(0)
+    expect(plugin.agents.length).toBeGreaterThan(0)
+  })
+
   test("loads manifest, agents, commands, skills, hooks", async () => {
     const plugin = await loadClaudePlugin(fixtureRoot)