Graphrag integration

[lspinheiro]

Why are these changes needed?

This PR adds initial integration between graphrag and autogen by exposing local and global search as tools that can be used in autogen-agentchat. To be followed up with a user-guide/cookbook. I I added no tests because the test data I used was fairly large and I'm not sure we have a stablished way to add tests for those more complex integrations but there is a script below that I used. The indexing needs to be done in graphrag first, the goal is to illustrate the e2e steps in a notebook.

Would appreciate some initial feedback, hoping to gradually extend with more flexible configuration, integration of drift search and examples.

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[rysweet]

hi @lspinheiro - this is exciting. its also marked as DRAFT in the subject line but not marked as such in the PR - I'm marking as draft and please set it back by clicking Ready to Review when you are ready.

[ekzhu]

Exciting to see this!! I love the tool idea. The tool itself can also be stateful and shared by multiple agents.

[lspinheiro]

Thanks @ekzhu and @rysweet . This should be ready for review now. Still needs improvements as mentioned in the description, but the tools can be used. I used the following test script.

import asyncio
from autogen_core import CancellationToken
from autogen_ext.models.openai import AzureOpenAIChatCompletionClient
from autogen_ext.tools.graphrag import (
    GlobalSearchTool,
    LocalSearchTool,
    GlobalDataConfig,
    LocalDataConfig,
    EmbeddingConfig,
)
from azure.identity import DefaultAzureCredential, get_bearer_token_provider


async def main():
    openai_client = AzureOpenAIChatCompletionClient(
        model="gpt-4o-mini",
        azure_endpoint="https://<resource-name>.openai.azure.com", 
        azure_deployment="gpt-4o-mini",
        api_version="2024-08-01-preview",
        azure_ad_token_provider=get_bearer_token_provider(DefaultAzureCredential(), "https://cognitiveservices.azure.com/.default")
    )

    # Global search example
    global_config = GlobalDataConfig(
        input_dir="./autogen-test/ragtest/output"
    )
    
    global_tool = GlobalSearchTool.from_config(
        openai_client=openai_client,
        data_config=global_config
    )

    global_args = {
        "query": "What does the station-master says about Dr. Becher?"
    }

    global_result = await global_tool.run_json(global_args, CancellationToken())
    print("\nGlobal Search Result:")
    print(global_result)
    
    # Local search example
    local_config = LocalDataConfig(
        input_dir="./autogen-test/ragtest/output"
    )

    embedding_config = EmbeddingConfig(
        model="text-embedding-3-small",
        api_base="https://<resource-name>.openai.azure.com", 
        deployment_name="text-embedding-3-small",
        api_version="2023-05-15",
        api_type="azure",
        azure_ad_token_provider=get_bearer_token_provider(DefaultAzureCredential(), "https://cognitiveservices.azure.com/.default"),
        max_retries=10,
        request_timeout=180.0,
    )

    local_tool = LocalSearchTool.from_config(
        openai_client=openai_client,
        data_config=local_config,
        embedding_config=embedding_config
    )

    local_args = {
        "query": "What does the station-master says about Dr. Becher?"
    }

    local_result = await local_tool.run_json(local_args, CancellationToken())
    print("\nLocal Search Result:")
    print(local_result)


if __name__ == "__main__":
    asyncio.run(main())

[lspinheiro]

@jackgerrits , I had to add verride-dependencies for pydantic and tenacity because the current version of pydantic is below their minimum requirement and there is a conflict with llamaindex which requires a lower version of tenancity, but it is a dev dependency for us. Let me know if you have any concerns with the approach

[gagb]

Thank you! More documentation would help me review this PR. I would like to be able to build the docs page on this PR and see the example.

[gagb]

Related #4438

[lspinheiro]

Thank you! More documentation would help me review this PR. I would like to be able to build the docs page on this PR and see the example.

@gagb , I added a sample with a readme and some docstrings that should help with the review.

[ekzhu]

Need an .gitignore file with the following:

model_config.json
data
cache

[lspinheiro]

@ekzhu , I have update the PR based on the feedback.

[ekzhu]

This is great! Just a few minor doc comments left.