Improve docs and add missing tests

[senko]

No description provided.

[Copilot]

Pull Request Overview

This pull request improves documentation coverage and adds comprehensive tests for the Think library's agent framework. The changes focus on enhancing code maintainability through better documentation and ensuring robust test coverage for critical components.

• Added comprehensive docstrings to core classes and methods across RAG, parsing, templating, and agent systems
• Created extensive test suite for the agent framework covering initialization, tool integration, and interaction patterns
• Fixed several type annotation issues and updated dependency management configuration

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
think/rag/eval.py	Added comprehensive class and method docstrings for RAG evaluation system
think/rag/base.py	Added extensive documentation for RAG base classes, data structures, and pipeline
think/prompt.py	Added method docstrings for all template rendering classes and their initialization
think/parser.py	Added comprehensive documentation for all parser classes and their methods
think/llm/chat.py	Added type ignore comments to fix type checking issues
think/llm/bedrock.py	Fixed potential null reference issue with image MIME type handling
think/llm/anthropic.py	Fixed property name from document_url to document
think/agent.py	Enhanced documentation for tool introspection method
tests/test_agent.py	Added comprehensive test suite covering all agent functionality
tests/llm/test_base.py	Added type ignore comments and improved error handling tests
tests/llm/test_anthropic_adapter.py	Fixed type checking issue in adapter test
tests/integration/test_llm.py	Enhanced fake adapter to properly implement BaseAdapter interface
tests/conftest.py	Updated Groq model configuration
pyproject.toml	Migrated from dependency-groups to uv tool configuration
README.md	Updated contribution guidelines with better formatting
INTERNALS.md	Added comprehensive internal architecture documentation

Comments suppressed due to low confidence (1)

tests/conftest.py:18

• The model 'meta-llama/llama-4-scout-17b-16e-instruct' appears to reference Llama 4, which may not exist yet. As of my knowledge cutoff in January 2025, Llama 3.x was the latest available. Please verify this model name exists in the Groq API.

        retval.append("groq:///?model=meta-llama/llama-4-scout-17b-16e-instruct")

[senko]

@greptile review this PR

[greptile-apps]

Greptile Summary

This PR represents a comprehensive effort to improve the codebase's documentation and test coverage across the Think library. The changes span multiple areas:

Documentation Improvements: Extensive docstrings have been added to all major modules including prompt.py, agent.py, parser.py, and rag/eval.py. These follow Python docstring conventions with proper parameter descriptions, return types, and exception documentation. A new INTERNALS.md file provides detailed architectural documentation covering components, data flow, and design patterns.

Bug Fixes: Several small but important fixes were implemented:

• Fixed property access in AnthropicAdapter from part.document_url to part.document
• Added null check in BedrockAdapter for missing MIME types
• Fixed test compatibility issues with NOT_GIVEN sentinel values

Test Infrastructure: Added comprehensive test coverage for the agent module with tests/test_agent.py, improved existing test files with better type safety and mock handling, and updated model configurations to use newer Groq models.

Tooling Updates: Migrated from PEP 735 dependency groups to uv's tool-specific configuration, updated development dependencies, and improved the contributing guidelines to reference the new internal documentation.

Type Safety: Added strategic # type: ignore comments where type checkers struggle with dynamic behavior, particularly in test mocking scenarios and Pydantic validators.

These changes collectively enhance the developer experience, improve code maintainability, and establish better practices for future contributions without modifying core functionality.

Confidence score: 4/5

• This PR is generally safe to merge with mostly documentation and test improvements, but contains a few logic changes that need attention.
• The score reflects confidence in the documentation/test additions but slight concern about the BedrockAdapter fallback behavior and potential impact of dependency migration.
• Files needing more attention: think/llm/bedrock.py (fallback behavior), pyproject.toml (dependency migration), tests/conftest.py (model compatibility)

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