From 848348f423b54db196aff88adb3723251f269c97 Mon Sep 17 00:00:00 2001
From: Peter Steinberger <steipete@gmail.com>
Date: Mon, 20 Apr 2026 14:01:54 +0100
Subject: [PATCH] refactor: share active plugin runtime lookup

---
 src/plugins/active-runtime-registry.ts | 28 ++++++++++++++++++++++++++
 src/plugins/cli-backends.runtime.ts    | 26 ++----------------------
 src/plugins/text-transforms.runtime.ts | 26 ++----------------------
 3 files changed, 32 insertions(+), 48 deletions(-)
 create mode 100644 src/plugins/active-runtime-registry.ts

diff --git a/src/plugins/active-runtime-registry.ts b/src/plugins/active-runtime-registry.ts
new file mode 100644
index 00000000000..336248801a2
--- /dev/null
+++ b/src/plugins/active-runtime-registry.ts
@@ -0,0 +1,28 @@
+import { createRequire } from "node:module";
+import type { PluginRegistry } from "./registry-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 built/runtime source candidates in order.
+    }
+  }
+  return null;
+}
+
+export function getActiveRuntimePluginRegistry(): PluginRegistry | null {
+  return loadPluginRuntime()?.getActivePluginRegistry() ?? null;
+}
diff --git a/src/plugins/cli-backends.runtime.ts b/src/plugins/cli-backends.runtime.ts
index 63d2eda60c7..bdd19855305 100644
--- a/src/plugins/cli-backends.runtime.ts
+++ b/src/plugins/cli-backends.runtime.ts
@@ -1,34 +1,12 @@
-import { createRequire } from "node:module";
+import { getActiveRuntimePluginRegistry } from "./active-runtime-registry.js";
 import type { CliBackendPlugin } from "./cli-backend.types.js";
 
 export type PluginCliBackendEntry = CliBackendPlugin & {
   pluginId: string;
 };
 
-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 resolveRuntimeCliBackends(): PluginCliBackendEntry[] {
-  return (loadPluginRuntime()?.getActivePluginRegistry()?.cliBackends ?? []).map((entry) =>
+  return (getActiveRuntimePluginRegistry()?.cliBackends ?? []).map((entry) =>
     Object.assign({}, entry.backend, { pluginId: entry.pluginId }),
   );
 }
diff --git a/src/plugins/text-transforms.runtime.ts b/src/plugins/text-transforms.runtime.ts
index 7c5f0185f92..5a6fd91ec89 100644
--- a/src/plugins/text-transforms.runtime.ts
+++ b/src/plugins/text-transforms.runtime.ts
@@ -1,31 +1,9 @@
-import { createRequire } from "node:module";
 import { mergePluginTextTransforms } from "../agents/plugin-text-transforms.js";
+import { getActiveRuntimePluginRegistry } from "./active-runtime-registry.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 {
-  const registry = loadPluginRuntime()?.getActivePluginRegistry();
+  const registry = getActiveRuntimePluginRegistry();
   const pluginTextTransforms = Array.isArray(registry?.textTransforms)
     ? registry.textTransforms.map((entry) => entry.transforms)
     : [];