refactor(tools): remove native ast-grep tool

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/plugin/tool-registry.team-mode.test.ts

@@ -90,7 +90,6 @@ describe("team-mode tool registry wiring", () => {
         createSkillTool: mock(() => fakeTool),
         createGrepTools: mock(() => ({})),
         createGlobTools: mock(() => ({})),
-        createAstGrepTools: mock(() => ({})),
         createSessionManagerTools: mock(() => ({})),
         createDelegateTask: mock(() => fakeTool),
         discoverCommandsSync: mock(() => []),
@@ -164,7 +163,6 @@ describe("team-mode tool registry wiring", () => {
         createSkillTool: mock(() => fakeTool),
         createGrepTools: mock(() => ({})),
         createGlobTools: mock(() => ({})),
-        createAstGrepTools: mock(() => ({})),
         createSessionManagerTools: mock(() => ({})),
         createDelegateTask: mock(() => fakeTool),
         discoverCommandsSync: mock(() => []),

src/plugin/tool-registry.test.ts

@@ -53,7 +53,6 @@ const toolFactories: NonNullable<Parameters<typeof createToolRegistry>[0]["toolF
   createSkillTool: mock(() => fakeTool),
   createGrepTools: mock(() => ({})),
   createGlobTools: mock(() => ({})),
-  createAstGrepTools: mock(() => ({})),
   createSessionManagerTools: mock(() => ({})),
   createDelegateTask: mock((options: { onSyncSessionCreated?: typeof syncSessionCreatedCallbacks[number] }) => {
     syncSessionCreatedCallbacks.push(options.onSyncSessionCreated)

src/plugin/tool-registry.ts

@@ -32,7 +32,6 @@ import {
   createSkillTool,
   createGrepTools,
   createGlobTools,
-  createAstGrepTools,
   createSessionManagerTools,
   createDelegateTask,
   discoverCommandsSync,
@@ -59,7 +58,6 @@ type ToolRegistryFactories = {
   createSkillTool: typeof createSkillTool
   createGrepTools: typeof createGrepTools
   createGlobTools: typeof createGlobTools
-  createAstGrepTools: typeof createAstGrepTools
   createSessionManagerTools: typeof createSessionManagerTools
   createDelegateTask: typeof createDelegateTask
   discoverCommandsSync: typeof discoverCommandsSync
@@ -91,7 +89,6 @@ const defaultToolRegistryFactories: ToolRegistryFactories = {
   createSkillTool,
   createGrepTools,
   createGlobTools,
-  createAstGrepTools,
   createSessionManagerTools,
   createDelegateTask,
   discoverCommandsSync,
@@ -338,7 +335,6 @@ export function createToolRegistry(args: {
   const allTools: Record<string, ToolDefinition> = {
     ...factories.createGrepTools(ctx),
     ...factories.createGlobTools(ctx),
-    ...factories.createAstGrepTools(ctx),
     ...factories.createSessionManagerTools(ctx),
     ...backgroundTools,
     call_omo_agent: callOmoAgent,