feat: 新增 Anthropic 兼容 /v1/messages API，移除旧版 /generate 端点

- 新增 /v1/messages 端点，兼容 Anthropic Messages API 格式
- 支持流式 SSE（message_start → content_block_delta → message_stop）
- 支持 system 顶层提示词与 stop_sequences 停止序列
- 新增 AnthropicMessage / MessagesRequest Pydantic 模型
- 移除旧版 /generate 端点及相关测试用例
- 更新 README.md / README-zh-CN.md / introduction.md 文档

README.md

@@ -47,6 +47,7 @@
 - 📦 **Lightweight**: Minimal dependencies, easy to deploy.
 - 🔬 **Research‑Friendly**: Modular design, easy to experiment with new ideas.
 - 🤗 **HuggingFace Integration**: Compatible with HuggingFace models and datasets.
+- 🔌 **Dual API Compatibility**: Supports both OpenAI and Anthropic chat completion APIs out of the box.
 
 ### Quick Start
 
@@ -67,27 +68,9 @@ pip install -e ".[dev]"
 #### Train a Model
 
 ```bash
-python scripts/tools/train.py \
-  --train_type=seq \
-  --data_root_path=/path/to/dataset \
-  --param_path=/path/to/model \
-  --n_epoch=3 \
-  --batch_size=4 \
-  --accumulation_steps=8 \
-  --max_lr=3e-4 \
-  --warmup_steps=2000 \
-  --ckpt_interval=5000 \
-  --ckpt_dir=./checkpoints
+python scripts/tools/train.py --train_type=seq --data_root_path=/path/to/dataset --param_path=/path/to/model
 ```
 
-#### Generate Text
-
-```bash
-python scripts/tools/generate.py --param_path=/path/to/param_path
-```
-
-#### Training Parameters
-
 | Parameter | Description | Default |
 |-----------|-------------|---------|
 | `--train_type` | Training type (`seq`, `sft`, `dpo`) | required |
@@ -105,6 +88,12 @@ python scripts/tools/generate.py --param_path=/path/to/param_path
 
 Full reference at [Parameter Guide](./assets/docs/params.md#training-parameters).
 
+#### Generate Text
+
+```bash
+python scripts/tools/generate.py --param_path=/path/to/param_path
+```
+
 #### Docker
 
 Build and run with Docker (recommended for GPU environments):
@@ -131,7 +120,7 @@ docker run --gpus all -v /path/to/data:/data -it astrai:latest
 
 #### Start HTTP Server
 
-Start the inference server with OpenAI-compatible HTTP API:
+Start the inference server with OpenAI and Anthropic-compatible HTTP API:
 
 ```bash
 python -m scripts.tools.server --port 8000 --device cuda
@@ -140,7 +129,7 @@ python -m scripts.tools.server --port 8000 --device cuda
 Make requests:
 
 ```bash
-# Chat API (OpenAI compatible)
+# OpenAI-compatible
 curl -X POST http://localhost:8000/v1/chat/completions \
   -H "Content-Type: application/json" \
   -d '{
@@ -148,7 +137,7 @@ curl -X POST http://localhost:8000/v1/chat/completions \
     "max_tokens": 512
   }'
 
-# Streaming response
+# OpenAI-compatible streaming
 curl -X POST http://localhost:8000/v1/chat/completions \
   -H "Content-Type: application/json" \
   -d '{
@@ -157,6 +146,27 @@ curl -X POST http://localhost:8000/v1/chat/completions \
     "max_tokens": 500
   }'
 
+# Anthropic-compatible
+curl -X POST http://localhost:8000/v1/messages \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "astrai",
+    "system": "You are a helpful assistant.",
+    "messages": [{"role": "user", "content": "Hello"}],
+    "max_tokens": 512
+  }'
+
+# Anthropic-compatible streaming with stop sequences
+curl -X POST http://localhost:8000/v1/messages \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "astrai",
+    "messages": [{"role": "user", "content": "Write a story"}],
+    "max_tokens": 500,
+    "stream": true,
+    "stop_sequences": ["The end"]
+  }'
+
 # Health check
 curl http://localhost:8000/health
 ```