fix: ship all versioned release metadata

package.json

@@ -90,14 +90,17 @@
     "scripts/uninstall.js",
     "skills/",
     "AGENTS.md",
+    "agent.yaml",
     ".claude-plugin/plugin.json",
+    ".claude-plugin/marketplace.json",
     ".claude-plugin/README.md",
     ".codex-plugin/plugin.json",
     ".codex-plugin/README.md",
     ".mcp.json",
     "install.sh",
     "install.ps1",
-    "llms.txt"
+    "llms.txt",
+    "VERSION"
   ],
   "bin": {
     "ecc": "scripts/ecc.js",

tests/scripts/build-opencode.test.js

@@ -67,6 +67,18 @@ function main() {
         packagedPaths.has(".opencode/dist/tools/index.js"),
         "npm pack should include compiled OpenCode tool output"
       )
+      assert.ok(
+        packagedPaths.has(".claude-plugin/marketplace.json"),
+        "npm pack should include .claude-plugin/marketplace.json"
+      )
+      assert.ok(
+        packagedPaths.has("agent.yaml"),
+        "npm pack should include agent.yaml"
+      )
+      assert.ok(
+        packagedPaths.has("VERSION"),
+        "npm pack should include VERSION"
+      )
     }],
   ]