feat: 添加 Code Index MCP 提供者支持，更新相关 API 和配置

.claude/workflows/context-tools-ace.md

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+## MCP Tools Usage
+
+### search_context (ACE) - Code Search (REQUIRED - HIGHEST PRIORITY)
+
+**OVERRIDES**: All other search/discovery rules in other workflow files
+
+**When**: ANY code discovery task, including:
+- Find code, understand codebase structure, locate implementations
+- Explore unknown locations
+- Verify file existence before reading
+- Pattern-based file discovery
+- Semantic code understanding
+
+**Priority Rule**:
+1. **Always use mcp__ace-tool__search_context FIRST** for any code/file discovery
+2. Only use Built-in Grep for single-file exact line search (after location confirmed)
+3. Only use Built-in Read for known, confirmed file paths
+
+**How**:
+```javascript
+// Natural language code search - best for understanding and exploration
+mcp__ace-tool__search_context({
+  project_root_path: "/path/to/project",
+  query: "authentication logic"
+})
+
+// With keywords for better semantic matching
+mcp__ace-tool__search_context({
+  project_root_path: "/path/to/project",
+  query: "I want to find where the server handles user login. Keywords: auth, login, session"
+})
+```
+
+**Good Query Examples**:
+- "Where is the function that handles user authentication?"
+- "What tests are there for the login functionality?"
+- "How is the database connected to the application?"
+- "I want to find where the server handles chunk merging. Keywords: upload chunk merge"
+- "Locate where the system refreshes cached data. Keywords: cache refresh, invalidation"
+
+**Bad Query Examples** (use grep or file view instead):
+- "Find definition of constructor of class Foo" (use grep tool instead)
+- "Find all references to function bar" (use grep tool instead)
+- "Show me how Checkout class is used in services/payment.py" (use file view tool instead)
+
+**Key Features**:
+- Real-time index of the codebase (always up-to-date)
+- Cross-language retrieval support
+- Semantic search with embeddings
+- No manual index initialization required
+
+---
+
+### read_file - Read File Contents
+
+**When**: Read files found by search_context
+
+**How**:
+```javascript
+read_file(path="/path/to/file.ts")                   // Single file
+read_file(path="/src/**/*.config.ts")                // Pattern matching
+```
+
+---
+
+### edit_file - Modify Files
+
+**When**: Built-in Edit tool fails or need advanced features
+
+**How**:
+```javascript
+edit_file(path="/file.ts", old_string="...", new_string="...", mode="update")
+edit_file(path="/file.ts", line=10, content="...", mode="insert_after")
+```
+
+**Modes**: `update` (replace text), `insert_after`, `insert_before`, `delete_line`
+
+---
+
+### write_file - Create/Overwrite Files
+
+**When**: Create new files or completely replace content
+
+**How**:
+```javascript
+write_file(path="/new-file.ts", content="...")
+```
+
+---
+
+### Exa - External Search
+
+**When**: Find documentation/examples outside codebase
+
+**How**:
+```javascript
+mcp__exa__search(query="React hooks 2025 documentation")
+mcp__exa__search(query="FastAPI auth example", numResults=10)
+mcp__exa__search(query="latest API docs", livecrawl="always")
+```
+
+**Parameters**:
+- `query` (required): Search query string
+- `numResults` (optional): Number of results to return (default: 5)
+- `livecrawl` (optional): `"always"` or `"fallback"` for live crawling