docs: 补充 MCP key 可选说明

AGENTS.md

@@ -0,0 +1,5 @@
+# AGENTS.md
+
+- Always reply in Simplified Chinese by default.
+- Use English only if the user explicitly asks for it.
+- Keep code, commands, file paths, logs, and identifiers unchanged.

README.md

@@ -0,0 +1,31 @@
+# opencode-config
+
+个人 [OpenCode](https://opencode.ai) 配置文件。
+
+## 使用
+
+1. 安装 OpenCode
+
+   ```bash
+   npm i -g opencode-ai
+   # 或
+   bun add -g opencode-ai
+   ```
+
+2. 克隆配置到 `~/.config/opencode`
+
+   ```bash
+   git clone <repo-url> ~/.config/opencode
+   ```
+
+3. 参考 `.env.example` 将以下环境变量配置到系统中
+
+   | 变量 | 必填 | 说明 |
+   |------|------|------|
+   | `LITELLM_BASE_URL` | 是 | 模型服务端点 |
+   | `LITELLM_API_KEY` | 是 | 模型服务密钥 |
+   | `EXA_API_KEY` | 否 | [Exa](https://exa.ai) 搜索，提供联网能力，不配则使用默认额度 |
+   | `CONTEXT7_API_KEY` | 否 | [Context7](https://context7.com) 文档查询，提供库文档检索，不配则使用默认额度 |
+   | `OPENCODE_GIT_BASH_PATH` | 否 | Windows 用户需指定 Git Bash 路径，否则工具调用可能异常 |
+
+4. 运行 `opencode`

oh-my-opencode.jsonc

@@ -18,11 +18,16 @@
     "ultrabrain": { "model": "openai/gpt-5.4", "variant": "xhigh" },
     "deep": { "model": "openai/gpt-5.3-codex", "variant": "medium" },
     "artistry": { "model": "google/gemini-3.1-pro-preview", "variant": "high" },
-    "quick": { "model": "anthropic/claude-haiku-4-5" },
+    "quick": { "model": "openai/gpt-5.4-mini" },
     "unspecified-low": { "model": "anthropic/claude-sonnet-4-6" },
     "unspecified-high": { "model": "anthropic/claude-opus-4-6", "variant": "high" },
     "writing": { "model": "google/gemini-3-flash-preview" }
   },
+  "experimental": {
+    "dynamic_context_pruning": {
+      "enabled": true
+    }
+  },
   "git_master": {
     "commit_footer": false,
     "include_co_authored_by": false

opencode.jsonc

@@ -50,6 +50,12 @@
           "reasoning": true,
           "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
           "limit": { "context": 400000, "input": 272000, "output": 128000 }
+        },
+        "gpt-5.4-mini": {
+          "name": "GPT-5.4 mini",
+          "reasoning": true,
+          "modalities": { "input": ["text", "image"], "output": ["text"] },
+          "limit": { "context": 400000, "input": 272000, "output": 128000 }
         }
       }
     },