ModelAdapter Chat (#17)

* implemented model chat

* fixed tests

* improved testing

* improved call logs

* fixed test file

* fixed docs

Author: cemde

CHANGELOG.md

@@ -9,6 +9,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+**ModelAdapter Chat Interface**
+
+- Added `chat()` method to `ModelAdapter` as the primary interface for LLM inference, accepting a list of messages in OpenAI format and returning a `ChatResponse` object and accepting tools
+- Added `ChatResponse` dataclass containing `content`, `tool_calls`, `role`, `usage`, `model`, and `stop_reason` fields for structured response handling
+
+**AnthropicModelAdapter**
+
+- New `AnthropicModelAdapter` for direct integration with Anthropic Claude models via the official Anthropic SDK
+- Handles Anthropic-specific message format conversion (system messages, tool_use/tool_result blocks) internally while accepting OpenAI-compatible input
+- Added `anthropic` optional dependency: `pip install maseval[anthropic]`
+
 ### Changed
 
 ### Fixed

docs/interface/inference/anthropic.md

@@ -0,0 +1,7 @@
+# Anthropic Inference Adapter
+
+This page documents the [Anthropic](https://docs.anthropic.com/) model adapter for MASEval.
+
+[:material-github: View source](https://github.com/parameterlab/maseval/blob/main/maseval/interface/inference/anthropic.py){ .md-source-file }
+
+::: maseval.interface.inference.anthropic.AnthropicModelAdapter

docs/reference/model.md

@@ -25,3 +25,11 @@ The following adapter classes implement the ModelAdapter interface for specific
 [:material-github: View source](https://github.com/parameterlab/maseval/blob/main/maseval/interface/inference/google_genai.py){ .md-source-file }
 
 ::: maseval.interface.inference.google_genai.GoogleGenAIModelAdapter
+
+[:material-github: View source](https://github.com/parameterlab/maseval/blob/main/maseval/interface/inference/litellm.py){ .md-source-file }
+
+::: maseval.interface.inference.litellm.LiteLLMModelAdapter
+
+[:material-github: View source](https://github.com/parameterlab/maseval/blob/main/maseval/interface/inference/anthropic.py){ .md-source-file }
+
+::: maseval.interface.inference.anthropic.AnthropicModelAdapter

maseval/__init__.py

@@ -22,7 +22,7 @@
     ToolSimulatorError,
     UserSimulatorError,
 )
-from .core.model import ModelAdapter
+from .core.model import ModelAdapter, ChatResponse
 from .core.user import User, TerminationReason
 from .core.evaluator import Evaluator
 from .core.history import MessageHistory, ToolInvocationHistory
@@ -67,8 +67,10 @@
     # History and tracing
     "MessageHistory",
     "ToolInvocationHistory",
-    "ModelAdapter",
     "TraceableMixin",
+    # Model adapters
+    "ModelAdapter",
+    "ChatResponse",
     # Exceptions and validation
     "MASEvalError",
     "AgentError",