fix: conv agent tool calling

[mike-deem-uipath]

Development Package

• Add this package as a dependency in your pyproject.toml:

[project]
dependencies = [
  # Exact version:
  "uipath-langchain==0.5.18.dev1004852408",

  # Any version from PR
  "uipath-langchain>=0.5.18.dev1004850000,<0.5.18.dev1004860000"
]

[[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
publish-url = "https://test.pypi.org/legacy/"
explicit = true

[tool.uv.sources]
uipath-langchain = { index = "testpypi" }

[cristipufu]

this won't survive suspend/resume (interruptable tool calls, create_process_tool, create_escalation_tool, deep rag etc)

[mike-deem-uipath]

Isn't that also true for tool_call_to_ai_message? If that map is empty after an interrupt, then none of the tool results would be associated with the correct message id (the existing code is creating a new guid for these, but CAS wouldn't know what to do with it and would produce an error event).

[cristipufu]

Exactly. That's why we were suggesting to loosen up the CAS contracts

[mike-deem-uipath]

It isn't just CAS, it's a breaking change for the contract with all the clients. It also makes the protocol more complicated. You can no longer depend on start/end events to scope event handlers, and that makes implementing clients harder.

I'm pretty sure all the state we need is in the graph's state and can be recovered on resume. But I'm not sure exactly how interrupts work with streaming in langgraph. Figuring it out now.