Add Chroma Retrieval #323

[ailunc]

Issue Link (REQUIRED)

#323
Fixes #323

Summary

Changes

• Added Python implementation of Chroma Retriever
  • Created ChromaRetriever class and ChromaRetrieverOptions class
  • Implemented all necessary retrieval methods
  • Added unit tests
  • Updated dependencies and exports
• Added TypeScript implementation of Chroma Retriever
  • Created ChromaRetriever class and ChromaRetrieverOptions interface
  • Implemented all necessary retrieval methods
  • Added unit tests
  • Updated dependencies and exports
  • Configured testing environment

User experience

Before:

• Users could not use ChromaDB as a retriever
• Manual implementation of ChromaDB integration was required

After:

• Users can directly use Chroma Retriever
• Support for both local and remote ChromaDB instances
• Support for custom embedding functions
• Support for persistent storage
• Support for SSL connections
• Support for custom result count
• Support for metadata retrieval

Usage examples:

Python:

from agent_squad.retrievers import ChromaRetriever, ChromaRetrieverOptions

# Create retriever
options = ChromaRetrieverOptions(
    collection_name="my_collection",
    persist_directory="./data"
)
retriever = ChromaRetriever(options)

# Retrieve documents
results = await retriever.retrieve("query text")
combined_results = await retriever.retrieve_and_combine_results("query text")

TypeScript:

import { ChromaRetriever, ChromaRetrieverOptions } from 'agent-squad';

// Create retriever
const options: ChromaRetrieverOptions = {
    collectionName: "my_collection",
    persistDirectory: "./data"
};
const retriever = new ChromaRetriever(options);

// Retrieve documents
const results = await retriever.retrieve("query text");
const combinedResults = await retriever.retrieveAndCombineResults("query text");

Checklist

• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• I have linked this PR to an existing issue (required)

Is this a breaking change?

RFC issue number: N/A

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

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[jeffchuber]

thanks for this!!! added a very clarification requests/comments

[jeffchuber]

should this be typed? also im thinking it shouldnt be optional?

[jeffchuber]

suggest higher default value like 10?

[jeffchuber]

what does this do and is there a reason it cant be implemented?

[jeffchuber]

why did you set 1.8.1 here? the latest version is 2.4.3

[jeffchuber]

was this a required change?

[jeffchuber]

same as python - should this be required and typed?

[jeffchuber]

bump default results to 10?

[jeffchuber]

same question as python

[jeffchuber]

will the maintainers be ok with this?