tool_runner

Types

ToolResult

Result type for a single tool execution: (tool_use_id, result_or_error).

pub type ToolResult =
  #(String, Result(String, String))

Values

execute_concurrent

</>

pub fn execute_concurrent(
  tool_calls tool_calls: List(content.ContentBlock),
  tools tools: tool.Registry,
  timeout_ms timeout: Int,
) -> List(#(String, Result(String, String)))

Execute tool calls concurrently using BEAM processes.

Spawns one unlinked, monitored process per tool call, then collects results with a timeout. Results are returned in the same order as the input tool_calls. Non-ToolUse blocks in the input list are silently ignored.

If a tool handler exceeds the timeout, an Error(“Tool execution timed out”) is returned for that tool. If a tool handler crashes, the monitor detects the exit and an Error describing the crash reason is returned immediately rather than waiting for the full timeout.