fix: decouple runtime from graph config

[cristipufu]

Description

This PR decouples the runtime from graph configuration by introducing a new LangGraphScriptRuntime class and a LangGraphJsonResolver to handle graph loading. The changes separate concerns by removing graph configuration logic from the runtime and moving it to a dedicated resolver pattern.

• Introduces LangGraphScriptRuntime as a specialized runtime for script-based execution
• Creates LangGraphJsonResolver to handle graph loading and configuration validation
• Removes graph configuration dependencies from the base runtime and context classes

This change also introduces LangGraphJsonResolverContext, an async context manager that wraps the existing LangGraphJsonResolver and returns a callable compatible with LangGraphRuntime. It ensures that the underlying graph is loaded only once, improving performance and efficiency when executing multiple runtimes with the same entrypoint.

async with LangGraphJsonResolverContext(entrypoint="my_agent") as resolver:
    # Pass the callable directly to the runtime
    runtime = LangGraphRuntime(context, resolver)
    result = await runtime.execute()

Development Package

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

[project]
dependencies = [
  # Exact version:
  "uipath-langchain==0.0.138.dev1001900658",

  # Any version from PR
  "uipath-langchain>=0.0.138.dev1001900000,<0.0.138.dev1001910000"
]

[[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" }

[Copilot]

Pull Request Overview

This PR decouples the runtime from graph configuration by introducing a new LangGraphScriptRuntime class and a GraphResolver to handle graph loading. The changes separate concerns by removing graph configuration logic from the runtime and moving it to a dedicated resolver pattern.

• Introduces LangGraphScriptRuntime as a specialized runtime for script-based execution
• Creates GraphResolver to handle graph loading and configuration validation
• Removes graph configuration dependencies from the base runtime and context classes

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
cli_run.py	Updates imports and instantiation to use LangGraphScriptRuntime
cli_eval.py	Updates import to use LangGraphScriptRuntime
cli_dev.py	Updates import to use LangGraphScriptRuntime
_runtime.py	Refactors base runtime to accept graph resolver, moves validation logic out
_graph_resolver.py	New file containing graph loading and validation logic
_context.py	Removes graph configuration fields from runtime context

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