refactor: wave 1 - extract leaf modules, rename catch-all files, split index.ts hooks

- Split 25+ index.ts files into hook.ts + extracted modules
- Rename all catch-all utils.ts/helpers.ts to domain-specific names
- Split src/tools/lsp/ into ~15 focused modules
- Split src/tools/delegate-task/ into ~18 focused modules
- Separate shared types from implementation
- 155 files changed, 60+ new files created
- All typecheck clean, 61 tests pass

src/hooks/tasks-todowrite-disabler/hook.ts

@@ -0,0 +1,33 @@
+import { BLOCKED_TOOLS, REPLACEMENT_MESSAGE } from "./constants";
+
+export interface TasksTodowriteDisablerConfig {
+  experimental?: {
+    task_system?: boolean;
+  };
+}
+
+export function createTasksTodowriteDisablerHook(
+  config: TasksTodowriteDisablerConfig,
+) {
+  const isTaskSystemEnabled = config.experimental?.task_system ?? false;
+
+  return {
+    "tool.execute.before": async (
+      input: { tool: string; sessionID: string; callID: string },
+      _output: { args: Record<string, unknown> },
+    ) => {
+      if (!isTaskSystemEnabled) {
+        return;
+      }
+
+      const toolName = input.tool as string;
+      if (
+        BLOCKED_TOOLS.some(
+          (blocked) => blocked.toLowerCase() === toolName.toLowerCase(),
+        )
+      ) {
+        throw new Error(REPLACEMENT_MESSAGE);
+      }
+    },
+  };
+}

src/hooks/tasks-todowrite-disabler/index.ts

@@ -1,29 +1,2 @@
-import { BLOCKED_TOOLS, REPLACEMENT_MESSAGE } from "./constants";
-
-export interface TasksTodowriteDisablerConfig {
-  experimental?: {
-    task_system?: boolean;
-  };
-}
-
-export function createTasksTodowriteDisablerHook(
-  config: TasksTodowriteDisablerConfig,
-) {
-  const isTaskSystemEnabled = config.experimental?.task_system ?? false;
-
-  return {
-    "tool.execute.before": async (
-      input: { tool: string; sessionID: string; callID: string },
-      output: { args: Record<string, unknown> },
-    ) => {
-      if (!isTaskSystemEnabled) {
-        return;
-      }
-
-      const toolName = input.tool as string;
-      if (BLOCKED_TOOLS.some((blocked) => blocked.toLowerCase() === toolName.toLowerCase())) {
-        throw new Error(REPLACEMENT_MESSAGE);
-      }
-    },
-  };
-}
+export { createTasksTodowriteDisablerHook } from "./hook";
+export type { TasksTodowriteDisablerConfig } from "./hook";