Fix SDK tools to respect cwd option

Core tools now properly use the cwd passed to createAgentSession().
Added tool factory functions for SDK users who specify custom cwd with explicit tools.

Fixes #279

packages/coding-agent/src/index.ts

@@ -93,6 +93,16 @@ export {
 	configureOAuthStorage,
 	// Factory
 	createAgentSession,
+	createBashTool,
+	// Tool factories (for custom cwd)
+	createCodingTools,
+	createEditTool,
+	createFindTool,
+	createGrepTool,
+	createLsTool,
+	createReadOnlyTools,
+	createReadTool,
+	createWriteTool,
 	// Helpers
 	defaultGetApiKey,
 	discoverAvailableModels,
@@ -106,7 +116,7 @@ export {
 	type FileSlashCommand,
 	findModel as findModelByProviderAndId,
 	loadSettings,
-	// Tools
+	// Pre-built tools (use process.cwd())
 	readOnlyTools,
 } from "./core/sdk.js";
 export {