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Usage:
  unreal-agent-runner [options] < request.json
  unreal-agent-runner [options] 'JSON request'
  unreal-agent-runner [options] -p 'prompt'

Reads one JSON request from stdin unless a positional request or -p is supplied.
Place options before the positional request. -p and a positional request are mutually exclusive.

Options:
  -log-directory string
    	session JSONL log directory; defaults to <workspace>/logs
  -p prompt
    	send a request with the given prompt without reading stdin
  -session-directory string
    	directory containing session files (default ".harness/sessions")
  -tool-heartbeat-interval duration
    	tool-wait heartbeat interval (0 disables) (default 10m0s)
  -workspace string
    	agent workspace and Bash working directory (default ".")

Request schema (JSON object; unknown fields are rejected):
  messages: array of {role: "user", content: string, message_id?: UUID string}
    Non-empty array of user messages delivered in order. role defaults to "user";
    message_id defaults to a generated UUID.
  prompt: string
    Shorthand for one user message; used when messages is absent.
    Supply messages or prompt. messages takes precedence when both are present.
  model: string (optional)
    Provider model ID; defaults to UNREAL_HARNESS_LLM_MODEL or the provider default.
  max_attempts: positive integer (optional)
    Overrides UNREAL_HARNESS_LLM_MAX_ATTEMPTS (default 5); 1 disables retries.
  system_prompt: string (optional)
    Replaces the default system prompt.
  thinking_level: "low" | "medium" | "high" | "xhigh" | "max" (optional; default "high")
  session_id: non-empty string (optional)
    Creates or resumes a persisted session.
  disallowed_tools: array of non-empty strings (optional)
    Static tool names excluded from model context and execution.
  extra_allowed_tools: array of non-empty strings (optional; accepted but ignored)
  include_partial_messages: boolean (optional; accepted but ignored)