@tanstack/ai/src/activities/chat/middleware/index.ts

Type-safe TypeScript AI SDK for streaming chat, tool calling, agents, structured outputs, and multimodal generation.

export type {
  ChatMiddleware,
  ChatMiddlewareContext,
  ChatMiddlewarePhase,
  ChatMiddlewareConfig,
  ChatResumeToolState,
  ChatResumeGenericResolution,
  StructuredOutputMiddlewareConfig,
  ToolCallHookContext,
  BeforeToolCallDecision,
  AfterToolCallInfo,
  IterationInfo,
  ToolPhaseCompleteInfo,
  UsageInfo,
  FinishInfo,
  AbortInfo,
  ErrorInfo,
  SandboxFileEvent,
  SandboxFileHookEvent,
  ChatSandboxHooks,
} from './types'

export { MiddlewareRunner } from './compose'

export { createCapability, CapabilityRegistry } from './capabilities'
export type {
  Capability,
  CapabilityHandle,
  CapabilityContext,
  CapabilityGetter,
  CapabilityProvider,
  CapabilityGetOptions,
} from './capabilities'
export { defineChatMiddleware } from './define'
export type { DefinedChatMiddleware } from './define'
export { createChatMiddleware } from './builder'
export type {
  ChatMiddlewareBuilder,
  MissingCapabilities,
  NamesOf,
} from './builder'
export { validateCapabilities } from './validate'
export type { AnyChatMiddleware } from './types'

export {
  LocksCapability,
  getLocks,
  provideLocks,
  InMemoryLockStore,
  withLocks,
  defineLock,
} from './locks'
export type { LockStore } from './locks'

export {
  isRunStatus,
  isTerminalRunStatus,
  defineRunStore,
  InMemoryRunStore,
} from './run-store'
export type {
  RunStatus,
  TerminalRunStatus,
  RunRecord,
  RunError,
  RunStore,
} from './run-store'