Litellm & Agents Callback Support

[RaghavPrabhu]

Default as litellm and Agent callback events support added.

---

Note

Introduces async status callback hooks with pipe/agent context throughout Agent, Engine, and AgentXPipe, fixes token API naming and MCP stdio session handling, updates CLI generation, tests, and bumps version.

• Core (Agent/Engine/Pipe):
  • Add async status_callback hooks with events (e.g., agent_execute_start, agent_llm_execute, agent_iteration_complete, agent_goal_satisfied, pipe_flow_start/end, errors) and context (pipe_id, agent_id, agent, conversation_id).
  • Thread pipe_id/agent metadata through engine start and goal verification.
  • Simplify goal verification (remove token-count gate) and add robust retry/error callbacks.
• MCP Handler:
  • Simplify stdio connection (no temp file), create ClientSession via stdio_client, ensure session initialized and cleaned up.
• LLM:
  • Fix async token API name (account_tokens -> correctly delegated to client); LiteLLM/OpenAI paths aligned.
• Utils:
  • Add StatusCallback type and _maybe_await; expose ptype_to_json_scheme usage; minor whitespace cleanup.
• CLI:
  • Safer pipe generation (default empty memory), formatting fixes, and kwargs handling; default memory to empty list in config.
• Templates/Deps:
  • Update app template to superagentx ^1.0.0b5.
• Tests:
  • Update tests to pass status_callback, adjust models, add LiteLLM/OpenAI test tweaks.
• Version:
  • Bump package to 1.0.0b15.

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