ReAct Module

A ReAct-style module that can call tools during execution. Use this to build tool-using agents that alternate between reasoning, tool calls, and observations before producing a final structured answer.

Details

Create a ReAct module with module(type = "react", tools = list(...)). If you pass tools with type = "predict", the module automatically upgrades to react. The module runs a loop of tool calls up to max_iterations, then produces output based on the module signature.

See also

• module for creating modules

• ragnar_tool and create_search_tool for search tools

• code_act for tool + code execution agents

Examples

if (FALSE) { # \dontrun{
library(dsprrr)
library(ellmer)

search_tool <- ellmer::tool(
  function(query) "Search results...",
  description = "Search for information",
  arguments = list(query = ellmer::type_string())
)

agent <- module(
  signature("question -> answer"),
  type = "react",
  tools = list(search_tool),
  max_iterations = 8L
)

result <- run(agent, question = "What is ReAct?", .llm = llm)

# Batch execution
questions <- tibble::tibble(question = c("Q1", "Q2"))
results <- run_dataset(agent, questions, .llm = llm)
} # }