fix(plugin): Correct Claude marketplace source path

Update the Claude marketplace entry to use a schema-valid relative source path and add a regression test so invalid marketplace sources fail in the local suite. Also document the maintainer workflow used for stale PR metadata and fork-gated Actions runs.

Fixes #344

tools/scripts/tests/claude_plugin_marketplace.test.js

@@ -0,0 +1,25 @@
+const assert = require("assert");
+const fs = require("fs");
+const path = require("path");
+const { findProjectRoot } = require("../../lib/project-root");
+
+const projectRoot = findProjectRoot(__dirname);
+const marketplacePath = path.join(projectRoot, ".claude-plugin", "marketplace.json");
+const marketplace = JSON.parse(fs.readFileSync(marketplacePath, "utf8"));
+
+assert.ok(Array.isArray(marketplace.plugins), "marketplace.json must define a plugins array");
+assert.ok(marketplace.plugins.length > 0, "marketplace.json must contain at least one plugin");
+
+for (const plugin of marketplace.plugins) {
+  assert.strictEqual(
+    typeof plugin.source,
+    "string",
+    `plugin ${plugin.name || "<unnamed>"} must define source as a string`,
+  );
+  assert.ok(
+    plugin.source.startsWith("./"),
+    `plugin ${plugin.name || "<unnamed>"} source must be a relative path starting with ./`,
+  );
+}
+
+console.log("ok");

tools/scripts/tests/run-test-suite.js

@@ -8,6 +8,7 @@ const ENABLED_VALUES = new Set(["1", "true", "yes", "on"]);
 const TOOL_SCRIPTS = path.join("tools", "scripts");
 const TOOL_TESTS = path.join(TOOL_SCRIPTS, "tests");
 const LOCAL_TEST_COMMANDS = [
+  [path.join(TOOL_TESTS, "claude_plugin_marketplace.test.js")],
   [path.join(TOOL_TESTS, "jetski_gemini_loader.test.js")],
   [path.join(TOOL_TESTS, "npm_package_contents.test.js")],
   [path.join(TOOL_TESTS, "validate_skills_headings.test.js")],