fastagent.config.yaml

# FastAgent Configuration File

# Default Model Configuration:
#
# Takes format:
#   <provider>.<model_string>.<reasoning_effort?> (e.g. anthropic.claude-3-5-sonnet-20241022 or openai.o3-mini.low)
# Accepts aliases for Anthropic Models: haiku, haiku3, sonnet, sonnet35, opus, opus3
# and OpenAI Models: gpt-4.1, gpt-4.1-mini, o1, o1-mini, o3-mini
#
# If not specified, defaults to "gpt-5-mini.low".
# Can be overriden with a command line switch --model=<model>, or within the Agent constructor.

default_model: gpt-5-mini.low
# mcp-ui support: disabled, enabled or auto. "auto" opens the web browser on the asset automatically
# mcp_ui_output_dir: ".fast-agent/ui"  # Where to write MCP-UI HTML files (relative to CWD if not absolute)
# mcp_ui_mode: enabled

# Logging and Console Configuration:
logger:
  # level: "debug" | "info" | "warning" | "error"
  # type: "none" | "console" | "file" | "http"
  # path: "/path/to/logfile.jsonl"

  # Switch the progress display on or off
  progress_display: true

  # Show chat User/Assistant messages on the console
  show_chat: true
  # Show tool calls on the console
  show_tools: true
  # Truncate long tool responses on the console
  truncate_tools: true

  streaming: markdown

# MCP Servers
mcp:
  servers:
    fetch:
      command: "uvx"
      args: ["mcp-server-fetch"]
    filesystem:
      command: "npx"
      args: ["-y", "@modelcontextprotocol/server-filesystem", "."]
    huggingface:
      url: "https://huggingface.co/mcp?login"
    everything:
      url: "http://localhost:3001/mcp"
      elicitation:
        mode: "auto-cancel"