AssembledToolCall

Reactive tool handle for framework bindings (stream.toolCalls, useToolCalls, injectToolCalls).

status, error, and output are plain values that the assembler updates in place as tool events arrive. That lets React, Vue, Svelte, and Angular re-render from a snapshot on each store tick without await, effects, or Suspense boundaries around a promise. ClientAssembledToolCall keeps a promise-based output instead for script consumers that read tool results sequentially.

output is null while the call is running or after it fails; successful completion sets it to the parsed tool return value (objects and strings are unwrapped from ToolMessage wire envelopes when needed).