feat: add plugin text transforms

src/plugins/text-transforms.runtime.ts

@@ -0,0 +1,33 @@
+import { createRequire } from "node:module";
+import { mergePluginTextTransforms } from "../agents/plugin-text-transforms.js";
+import type { PluginTextTransforms } from "./types.js";
+
+type PluginRuntimeModule = Pick<typeof import("./runtime.js"), "getActivePluginRegistry">;
+
+const require = createRequire(import.meta.url);
+const RUNTIME_MODULE_CANDIDATES = ["./runtime.js", "./runtime.ts"] as const;
+
+let pluginRuntimeModule: PluginRuntimeModule | undefined;
+
+function loadPluginRuntime(): PluginRuntimeModule | null {
+  if (pluginRuntimeModule) {
+    return pluginRuntimeModule;
+  }
+  for (const candidate of RUNTIME_MODULE_CANDIDATES) {
+    try {
+      pluginRuntimeModule = require(candidate) as PluginRuntimeModule;
+      return pluginRuntimeModule;
+    } catch {
+      // Try source/runtime candidates in order.
+    }
+  }
+  return null;
+}
+
+export function resolveRuntimeTextTransforms(): PluginTextTransforms | undefined {
+  return mergePluginTextTransforms(
+    ...(loadPluginRuntime()
+      ?.getActivePluginRegistry()
+      ?.textTransforms.map((entry) => entry.transforms) ?? []),
+  );
+}