feat(core): add embedded v2 session runtime and tool foundation (#30632)

packages/llm/src/index.ts

@@ -8,7 +8,9 @@ export type {
   Service as LLMClientService,
 } from "./route/client"
 export * from "./schema"
-export { Tool, ToolFailure, toDefinitions, tool } from "./tool"
+export { Tool, ToolFailure, toDefinitions } from "./tool"
+export { ToolRuntime } from "./tool-runtime"
+export type { DispatchResult as ToolDispatchResult, ToolSettlement } from "./tool-runtime"
 export type {
   AnyExecutableTool,
   AnyTool,
@@ -17,16 +19,11 @@ export type {
   Tool as ToolShape,
   ToolExecute,
   ToolExecuteContext,
+  ToolModelOutputInput,
   Tools,
   ToolSchema,
+  ToolToModelOutput,
 } from "./tool"
-export type {
-  RunOptions as ToolRunOptions,
-  RuntimeState as ToolRuntimeState,
-  StopCondition as ToolStopCondition,
-  ToolExecution,
-} from "./tool-runtime"
-
 export * as LLM from "./llm"
 export type {
   Definition as ProviderDefinition,