fix: remove pi-tool-utils.ts, fix executor.test.ts imports

- Remove pi-tool-utils.ts (too many dependencies on pi-runtime internals)
- Fix executor.test.ts to import from extracted modules
- Remove pi-tool-utils from index.ts exports
- Build verified green

packages/adapters/src/executor.test.ts

@@ -7,14 +7,13 @@ import {
   createRunExecutor,
   createRunWorkspaceCheckpoint,
   loadCurrentTurnImages,
-  missingTurnImagesInstruction,
   runNotificationsEnabled,
   selectBuiltinToolsForRun,
-  settleSteeringAttachmentLoads,
-  threadContextForRun,
   toolCompletionAuditPayload,
   toolCompletionFromResult,
 } from "./executor.js";
+import { missingTurnImagesInstruction, settleSteeringAttachmentLoads } from "./executor-attachments.js";
+import { threadContextForRun } from "./executor-completion.js";
 import { serializeModelSecret } from "./pi-oauth.js";
 
 describe("tool completion audit", () => {

packages/adapters/src/index.ts

@@ -91,7 +91,6 @@ export * from "./pi-oauth.js";
 export * from "./pi-openai-compatible-provider.js";
 export * from "./pi-runtime.js";
 export * from "./pi-session.js";
-export * from "./pi-tool-utils.js";
 export * from "./pipedream-connector.js";
 export * from "./realtime.js";
 export * from "./release-watch.js";

packages/adapters/src/pi-runtime.ts

@@ -550,12 +550,3 @@ export {
   ToolCallBudget,
   ToolHost,
 } from "./pi-model-config.js";
-export {
-  toAgentTools,
-  normalizeAgentToolName,
-  describeToolActivity,
-  normalizeAgentToolNames,
-  toAgentTool,
-  executeSubagent,
-  parametersFor,
-} from "./pi-tool-utils.js";