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onStdout?: (data: { line: string }) => void; onStderr?: (data: { line: string }) => void }): Promise<{ exitCode: number }>\n kill(): Promise\n}\n\nexport function createE2BBackend(config: E2BConfig): SandboxBackend {\n let instance: E2BSandboxInstance | null = null\n let instancePromise: Promise | null = null\n\n const getInstance = (): Promise => {\n if (instance) return Promise.resolve(instance)\n if (instancePromise) return instancePromise\n\n instancePromise = (async () => {\n try {\n const mod = await import('@e2b/code-interpreter')\n const Sandbox = mod.Sandbox ?? (mod as unknown as { default: { Sandbox: unknown } }).default?.Sandbox\n if (!Sandbox) {\n throw new SandboxError({\n code: ErrorCodes.AK_SANDBOX_BACKEND_FAILED,\n message: 'Sandbox class not found in @e2b/code-interpreter',\n hint: 'The installed @e2b/code-interpreter does not export Sandbox; check version compatibility.',\n })\n }\n\n const sb = await (Sandbox as unknown as {\n create(opts: { apiKey: string; timeout?: number }): Promise\n }).create({\n apiKey: config.apiKey,\n timeout: config.timeout ?? 300_000,\n })\n\n instance = sb\n return sb\n } catch (err) {\n instancePromise = null\n const msg = err instanceof Error ? err.message : String(err)\n if (msg.includes('Cannot find module') || msg.includes('@e2b')) {\n throw new SandboxError({\n code: ErrorCodes.AK_SANDBOX_PEER_MISSING,\n message: 'Install @e2b/code-interpreter to use E2B sandbox: npm install @e2b/code-interpreter',\n hint: 'E2B is the default backend; install the optional peer or pass a custom backend.',\n })\n }\n throw err\n }\n })()\n\n return instancePromise\n }\n\n return {\n /**\n * Execute code in the E2B sandbox. **Concurrency note:** the backend\n * lazily creates a single shared `Sandbox` instance and serializes\n * the SDK's `runCode` calls onto it; concurrent invocations share\n * one VM. If you need isolation per call, create one backend per\n * call rather than running parallel `execute()` on a single backend.\n */\n async execute(code: string, options: ExecuteOptions = {}): Promise {\n const sb = await getInstance()\n const language = options.language ?? 'javascript'\n const timeout = options.timeout ?? 30_000\n\n let stdout = ''\n let stderr = ''\n const startTime = Date.now()\n\n let timeoutHandle: ReturnType | null = null\n const timeoutPromise = new Promise((_, reject) => {\n timeoutHandle = setTimeout(\n () => reject(new Error(`Sandbox execution timed out after ${timeout}ms`)),\n timeout,\n )\n })\n\n try {\n const resultPromise = sb.runCode(code, {\n language: language === 'python' ? 'python' : 'javascript',\n onStdout: (data) => { stdout += data.line + '\\n' },\n onStderr: (data) => { stderr += data.line + '\\n' },\n })\n\n const result = await Promise.race([resultPromise, timeoutPromise])\n\n return {\n stdout: stdout.trimEnd(),\n stderr: stderr.trimEnd(),\n exitCode: result.exitCode,\n durationMs: Date.now() - startTime,\n }\n } catch (err) {\n return {\n stdout: stdout.trimEnd(),\n stderr: err instanceof Error ? err.message : String(err),\n exitCode: 1,\n durationMs: Date.now() - startTime,\n }\n } finally {\n if (timeoutHandle) clearTimeout(timeoutHandle)\n }\n },\n\n async dispose() {\n if (instance) {\n await instance.kill()\n instance = null\n instancePromise = null\n }\n },\n }\n}\n","import { ConfigError, ErrorCodes } from '@agentskit/core'\nimport type { SandboxBackend, ExecuteOptions, ExecuteResult } from './types'\nimport type { E2BConfig } from './e2b-backend'\n\nexport interface SandboxConfig {\n apiKey?: string\n backend?: SandboxBackend\n language?: 'javascript' | 'python'\n timeout?: number\n network?: boolean\n memoryLimit?: string\n}\n\nexport interface Sandbox {\n execute(code: string, options?: ExecuteOptions): Promise\n dispose(): Promise\n}\n\nexport function createSandbox(config: SandboxConfig = {}): Sandbox {\n const defaults: ExecuteOptions = {\n language: config.language ?? 'javascript',\n timeout: config.timeout ?? 30_000,\n network: config.network ?? false,\n memoryLimit: config.memoryLimit ?? '50MB',\n }\n\n let backend: SandboxBackend | null = config.backend ?? null\n\n const getBackend = async (): Promise => {\n if (backend) return backend\n\n if (!config.apiKey) {\n throw new ConfigError({\n code: ErrorCodes.AK_CONFIG_INVALID,\n message:\n 'Sandbox requires either an apiKey (for E2B) or a custom backend. ' +\n 'Provide apiKey or pass a SandboxBackend via the backend option.',\n })\n }\n\n const mod = await import(/* webpackIgnore: true */ /* turbopackIgnore: true */ /* @vite-ignore */ './e2b-backend')\n backend = mod.createE2BBackend({\n apiKey: config.apiKey,\n timeout: defaults.timeout,\n })\n\n return backend\n }\n\n return {\n async execute(code: string, options: ExecuteOptions = {}): Promise {\n const mergedOptions: ExecuteOptions = {\n ...defaults,\n ...options,\n }\n\n const b = await getBackend()\n return await b.execute(code, mergedOptions)\n },\n\n async dispose(): Promise {\n await backend?.dispose?.()\n backend = null\n },\n }\n}\n"]}