fix(coding-agent): built-in tools work like extension tools

Export readToolDefinition / createReadToolDefinition and the equivalent built-in ToolDefinition APIs from @mariozechner/pi-coding-agent.

packages/coding-agent/src/index.ts

@@ -223,8 +223,16 @@ export {
 	type BashToolInput,
 	type BashToolOptions,
 	bashTool,
+	bashToolDefinition,
 	codingTools,
+	createBashToolDefinition,
+	createEditToolDefinition,
+	createFindToolDefinition,
+	createGrepToolDefinition,
 	createLocalBashOperations,
+	createLsToolDefinition,
+	createReadToolDefinition,
+	createWriteToolDefinition,
 	DEFAULT_MAX_BYTES,
 	DEFAULT_MAX_LINES,
 	type EditOperations,
@@ -232,27 +240,32 @@ export {
 	type EditToolInput,
 	type EditToolOptions,
 	editTool,
+	editToolDefinition,
 	type FindOperations,
 	type FindToolDetails,
 	type FindToolInput,
 	type FindToolOptions,
 	findTool,
+	findToolDefinition,
 	formatSize,
 	type GrepOperations,
 	type GrepToolDetails,
 	type GrepToolInput,
 	type GrepToolOptions,
 	grepTool,
+	grepToolDefinition,
 	type LsOperations,
 	type LsToolDetails,
 	type LsToolInput,
 	type LsToolOptions,
 	lsTool,
+	lsToolDefinition,
 	type ReadOperations,
 	type ReadToolDetails,
 	type ReadToolInput,
 	type ReadToolOptions,
 	readTool,
+	readToolDefinition,
 	type ToolsOptions,
 	type TruncationOptions,
 	type TruncationResult,
@@ -264,6 +277,7 @@ export {
 	type WriteToolOptions,
 	withFileMutationQueue,
 	writeTool,
+	writeToolDefinition,
 } from "./core/tools/index.js";
 // Main entry point
 export { main } from "./main.js";