Description

This PR adds CometAPI integration to mem0 as both an LLM provider and embedding provider. CometAPI is a unified API gateway providing access to 500+ AI models through a single OpenAI-compatible interface.

Fixes #3465

Type of change

• New feature (non-breaking change which adds functionality)
• Documentation update

How Has This Been Tested?

Comprehensive test suite covering both LLM and embedding functionality:

LLM Tests (10 tests):

• Configuration initialization (BaseLlmConfig and CometAPIConfig)
• Environment variable handling (COMETAPI_KEY)
• Response generation with and without tools
• Response parsing with various scenarios
• Tool calling (single and multiple tool calls)

Embedding Tests (7 tests):

• Default and custom model configuration
• Text preprocessing (newline removal)
• API key handling (config and environment)
• Multiple embedding models (text-embedding-3-small, text-embedding-3-large, ada-002)

Test Results:

✅ 17/17 tests passed
✅ Ruff code style checks passed
✅ No linting errors

Test Command:

pytest tests/llms/test_cometapi.py tests/embeddings/test_cometapi_embeddings.py -v

• Unit Test

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

Maintainer Checklist

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Made sure Checks passed