feat(coding-agent): accept inline extension factories in main() (#3099)

packages/coding-agent/src/index.ts

@@ -291,7 +291,7 @@ export {
 	writeToolDefinition,
 } from "./core/tools/index.js";
 // Main entry point
-export { main } from "./main.js";
+export { type MainOptions, main } from "./main.js";
 // Run modes for programmatic SDK usage
 export {
 	InteractiveMode,

packages/coding-agent/src/main.ts

@@ -24,6 +24,7 @@ import {
 } from "./core/agent-session-services.js";
 import { AuthStorage } from "./core/auth-storage.js";
 import { exportFromFile } from "./core/export-html/index.js";
+import type { ExtensionFactory } from "./core/extensions/types.js";
 import { KeybindingsManager } from "./core/keybindings.js";
 import type { ModelRegistry } from "./core/model-registry.js";
 import { resolveCliModel, resolveModelScope, type ScopedModel } from "./core/model-resolver.js";
@@ -418,7 +419,11 @@ async function promptForMissingSessionCwd(
 	});
 }
 
-export async function main(args: string[]) {
+export interface MainOptions {
+	extensionFactories?: ExtensionFactory[];
+}
+
+export async function main(args: string[], options?: MainOptions) {
 	resetTimings();
 	const offlineMode = args.includes("--offline") || isTruthyEnvFlag(process.env.PI_OFFLINE);
 	if (offlineMode) {
@@ -535,6 +540,7 @@ export async function main(args: string[]) {
 				noThemes: parsed.noThemes,
 				systemPrompt: parsed.systemPrompt,
 				appendSystemPrompt: parsed.appendSystemPrompt,
+				extensionFactories: options?.extensionFactories,
 			},
 		});
 		const { settingsManager, modelRegistry, resourceLoader } = services;