feat(core): 更新文件操作工具描述为模板格式

- 更新 read_file 工具描述，支持模板变量
- 更新 edit_file 工具描述，支持模板变量
- 更新 write_file 工具描述
- 添加 read-file-tool 常量 (DEFAULT_READ_LINES, MAX_LINE_LENGTH)
- 在模板渲染器中注册新常量

packages/core/src/constants/read-file-tool.ts

@@ -0,0 +1,9 @@
+/**
+ * Read File 工具配置常量
+ */
+
+/** 默认读取行数 */
+export const DEFAULT_READ_LINES = 2000;
+
+/** 最大行长度（超过会被截断） */
+export const MAX_LINE_LENGTH = 2000;

packages/core/src/template/renderer.ts

@@ -26,6 +26,10 @@ import {
   MAX_TIMEOUT_MS,
   MAX_OUTPUT_CHARS,
 } from '../constants/bash-tool.js';
+import {
+  DEFAULT_READ_LINES,
+  MAX_LINE_LENGTH,
+} from '../constants/read-file-tool.js';
 
 /**
  * 获取嵌套属性值
@@ -466,6 +470,12 @@ export function createToolDescriptionContext(
     EXPLORE_SUBAGENT_TYPE: 'explore',
   };
 
+  // 添加 read_file 工具相关常量
+  const readFileVars: Record<string, number> = {
+    DEFAULT_READ_LINES,
+    MAX_LINE_LENGTH,
+  };
+
   // 注册模板函数
   const functions: TemplateFunctionRegistry = {
     CUSTOM_TIMEOUT_MS: () => CUSTOM_TIMEOUT_MS,
@@ -475,7 +485,7 @@ export function createToolDescriptionContext(
 
   return {
     ...base,
-    custom: { ...base.custom, ...toolVars, ...subagentVars },
+    custom: { ...base.custom, ...toolVars, ...subagentVars, ...readFileVars },
     __functions__: functions,
   };
 }

packages/core/src/tools/descriptions/filesystem/edit_file.txt

@@ -1 +1,9 @@
-通过字符串替换编辑文件的部分内容。比 write_file 更高效，适合修改文件的一小部分。
+Performs exact string replacements in files.
+
+Usage:
+- You must use your `${READ_TOOL_NAME}` tool at least once in the conversation before editing. This tool will error if you attempt an edit without reading the file.
+- When editing text from Read tool output, ensure you preserve the exact indentation (tabs/spaces) as it appears AFTER the line number prefix. The line number prefix format is: spaces + line number + tab. Everything after that tab is the actual file content to match. Never include any part of the line number prefix in the old_string or new_string.
+- ALWAYS prefer editing existing files in the codebase. NEVER write new files unless explicitly required.
+- Only use emojis if the user explicitly requests it. Avoid adding emojis to files unless asked.
+- The edit will FAIL if `old_string` is not unique in the file. Either provide a larger string with more surrounding context to make it unique or use `replace_all` to change every instance of `old_string`.
+- Use `replace_all` for replacing and renaming strings across the file. This parameter is useful if you want to rename a variable for instance.

packages/core/src/tools/descriptions/filesystem/read_file.txt

@@ -1 +1,12 @@
-读取指定文件的内容
+Reads a file from the local filesystem. You can access any file directly by using this tool.
+Assume this tool is able to read all files on the machine. If the User provides a path to a file assume that path is valid. It is okay to read a file that does not exist; an error will be returned.
+
+Usage:
+- The file_path parameter must be an absolute path, not a relative path
+- By default, it reads up to ${DEFAULT_READ_LINES} lines starting from the beginning of the file
+- You can optionally specify a line offset and limit (especially handy for long files), but it's recommended to read the whole file by not providing these parameters
+- Any lines longer than ${MAX_LINE_LENGTH} characters will be truncated
+- Results are returned using cat -n format, with line numbers starting at 1
+- This tool can only read files, not directories. To read a directory, use an ls command via the ${BASH_TOOL_NAME} tool.
+- You can call multiple tools in a single response. It is always better to speculatively read multiple potentially useful files in parallel.
+- If you read a file that exists but has empty contents you will receive a system reminder warning in place of file contents.

packages/core/src/tools/descriptions/filesystem/write_file.txt

@@ -1 +1,8 @@
-创建新文件或完全覆盖现有文件。如果只需修改文件的一部分，请使用 edit_file。
+Writes a file to the local filesystem.
+
+Usage:
+- This tool will overwrite the existing file if there is one at the provided path.
+- If this is an existing file, you MUST use the ${READ_TOOL_NAME} tool first to read the file's contents. This tool will fail if you did not read the file first.
+- ALWAYS prefer editing existing files in the codebase. NEVER write new files unless explicitly required.
+- NEVER proactively create documentation files (*.md) or README files. Only create documentation files if explicitly requested by the User.
+- Only use emojis if the user explicitly requests it. Avoid writing emojis to files unless asked.