feat: make each plugin an npm workspace built by a termix-plugin CLI

scripts/run-plugin-tests.cjs

@@ -0,0 +1,57 @@
+/**
+ * Runs every plugin's own vitest suite.
+ *
+ * Core's `npm run test` covers src/ only. A plugin's tests live beside it and
+ * run under its own config, so a plugin that moves out of this repo keeps a
+ * working suite.
+ */
+
+const fs = require("node:fs");
+const path = require("node:path");
+const { spawnSync } = require("node:child_process");
+
+const root = path.resolve(__dirname, "..");
+const source = path.join(root, "plugins");
+const cli = path.join(root, "packages", "plugin-sdk", "cli", "index.mjs");
+
+const pluginIds = fs
+  .readdirSync(source, { withFileTypes: true })
+  .filter((entry) => entry.isDirectory())
+  .filter((entry) =>
+    fs.existsSync(path.join(source, entry.name, "vitest.config.ts")),
+  )
+  .map((entry) => entry.name);
+
+const failed = [];
+
+for (const id of pluginIds) {
+  const pluginDir = path.join(source, id);
+
+  const hasTests = ["tests/backend", "tests/frontend"].some((dir) => {
+    const full = path.join(pluginDir, dir);
+    return (
+      fs.existsSync(full) &&
+      fs
+        .readdirSync(full, { recursive: true })
+        .some(
+          (name) =>
+            String(name).endsWith(".test.ts") ||
+            String(name).endsWith(".test.tsx"),
+        )
+    );
+  });
+  if (!hasTests) continue;
+
+  const result = spawnSync(process.execPath, [cli, "test"], {
+    cwd: pluginDir,
+    stdio: "inherit",
+  });
+  if (result.status !== 0) failed.push(id);
+}
+
+if (failed.length > 0) {
+  console.error(`\nPlugin tests failed: ${failed.join(", ")}`);
+  process.exit(1);
+}
+
+console.log(`\nPlugin tests passed for ${pluginIds.length} plugin(s).`);