chore: 移除旧的Python实现代码，更新文档和Rust代码

- 删除所有Python相关的源码、测试文件和打包配置
- 更新中文使用文档，补充Rust构建运行说明
- 修复Rust服务端的类型转换和日志事件格式问题

Author: HisenWeb

.gitignore

@@ -1,10 +1,6 @@
-__pycache__/
-.pytest_cache/
-.venv/
-*.pyc
-*.db
-*.sqlite3
-*.log
 .env
 target/
-Cargo.lock
+Cargo.lock
+*.db
+*.sqlite3
+*.log

README.md

@@ -14,30 +14,81 @@ sessions, and OpenCode tools are intentionally absent.
 
 ```text
 Codex subagent
-  -> POST /v1/responses
+  -> POST /v1/responses (Responses API)
   -> this adapter
-  -> POST https://opencode.ai/zen/go/v1/chat/completions
-  -> Responses JSON or SSE
+  -> POST /chat/completions (Chat Completions API)
+  -> OpenCode Go (https://opencode.ai/zen/go/v1)
+  -> Chat Completions response / SSE stream
+  -> this adapter
+  -> Responses API response / SSE stream
+  -> Codex subagent
 ```
 
 Codex remains responsible for task roles, sandbox permissions, tool execution,
 review, and deciding whether work is complete.
 
-## Run
+## Quick start (Rust)
+
+```bash
+# Build
+cargo build --release
 
-```powershell
-$env:OPENCODE_GO_API_KEY = "..."
-$env:CODEX_OPENCODE_LOCAL_TOKEN = "use-a-different-local-token"
-$env:CODEX_OPENCODE_PORT = "4010"
-python -m codex_opencode_adapter
+# Run
+OPENCODE_GO_API_KEY="your-key" \
+CODEX_OPENCODE_LOCAL_TOKEN="your-local-token" \
+cargo run
 ```
 
+The adapter listens on `127.0.0.1:4010` by default.
+
+## Environment variables
+
+| Variable | Default | Description |
+|---|---|---|
+| `OPENCODE_GO_API_KEY` | (required) | API key for OpenCode Go |
+| `CODEX_OPENCODE_LOCAL_TOKEN` | (none) | Bearer token the adapter requires from callers; if empty, auth is skipped |
+| `CODEX_OPENCODE_HOST` | `127.0.0.1` | Listen host |
+| `CODEX_OPENCODE_PORT` | `4010` | Listen port |
+| `OPENCODE_GO_BASE_URL` | `https://opencode.ai/zen/go/v1` | Upstream base URL |
+| `CODEX_OPENCODE_STATE_DB` | `.codex-opencode/state.sqlite` | SQLite state database path |
+| `CODEX_OPENCODE_STATE_TTL_SECONDS` | `21600` | State TTL (6 hours) |
+| `CODEX_OPENCODE_TIMEOUT_SECONDS` | `300` | Upstream request timeout |
+| `CODEX_OPENCODE_MAX_REQUEST_BYTES` | `8388608` | Max request body size (8 MB) |
+
 The upstream API key and local client token must be different. The adapter
-never logs either token. Copy the provider and agent examples from
-`config.toml.example` and `.codex/agents/` into the desired Codex configuration.
+never logs either token.
+
+## Run tests
 
-The provider block must be installed in the user-level Codex config. Codex
-ignores `model_providers` declared in a project's `.codex/config.toml`.
+### Rust tests (unit + integration)
+
+```bash
+# All tests
+cargo test
+
+# Unit tests only
+cargo test --lib
+
+# L2 integration tests (mock upstream, no external dependency)
+cargo test --test test_e2e
+
+# L2 real smoke test (requires OPENCODE_GO_API_KEY)
+OPENCODE_GO_API_KEY="your-key" cargo test --test test_e2e test_e2e_real_smoke -- --ignored
+```
+
+### Test structure
+
+```text
+tests/
+├── conversion_rs.rs          # Rust unit tests for conversion modules
+└── test_e2e.rs               # L2 integration tests (mock upstream + real smoke)
+```
+
+## Endpoints
+
+- `POST /v1/responses` — Responses API (streaming and non-streaming)
+- `GET /v1/models` — List available models (prefixed with `opencode-go/`)
+- `GET /health` — Health check
 
 ## Reasoning compatibility
 
@@ -57,11 +108,19 @@ metadata and logs rather than silently pretending to work.
 Reasoning content is retained only in stored chat history so tool continuations
 remain valid. It is not exposed as user-visible chain of thought.
 
-## Endpoints
+## Supported models
+
+All models available on OpenCode Go, prefixed with `opencode-go/` when calling
+the adapter:
+
+- deepseek-v4-flash, deepseek-v4-pro
+- glm-5.1, glm-5.2
+- kimi-k2.6, kimi-k2.7-code
+- mimo-v2.5, mimo-v2.5-pro
+- minimax-m2.7, minimax-m3
+- qwen3.6-plus, qwen3.7-max, qwen3.7-plus
 
-- `POST /v1/responses`
-- `GET /v1/models`
-- `GET /health`
+## State management
 
 State needed for `previous_response_id` and tool results is stored in a local
 SQLite database and expires according to `CODEX_OPENCODE_STATE_TTL_SECONDS`.