| 13 | * @param config Required configuration including working directory |
| 14 | */ |
| 15 | export const createFileReadTool: ToolFactory = (config: ToolConfiguration) => { |
| 16 | return tool({ |
| 17 | description: TOOL_DEFINITIONS.file_read.description, |
| 18 | inputSchema: TOOL_DEFINITIONS.file_read.schema, |
| 19 | execute: async ( |
| 20 | { path, offset, limit }, |
| 21 | { abortSignal: _abortSignal } |
| 22 | ): Promise<FileReadToolResult> => { |
| 23 | // Note: abortSignal available but not used - file reads are fast and complete quickly |
| 24 | |
| 25 | let filePath = path; |
| 26 | try { |
| 27 | const { |
| 28 | correctedPath: validatedPath, |
| 29 | warning: pathWarning, |
| 30 | resolvedPath, |
| 31 | } = resolvePathWithinCwd(filePath, config.cwd, config.runtime); |
| 32 | filePath = validatedPath; |
| 33 | |
| 34 | // Check if file exists using runtime |
| 35 | let fileStat; |
| 36 | try { |
| 37 | fileStat = await config.runtime.stat(resolvedPath); |
| 38 | } catch (err) { |
| 39 | if (err instanceof RuntimeError) { |
| 40 | return { |
| 41 | success: false, |
| 42 | error: err.message, |
| 43 | }; |
| 44 | } |
| 45 | throw err; |
| 46 | } |
| 47 | |
| 48 | if (fileStat.isDirectory) { |
| 49 | return { |
| 50 | success: false, |
| 51 | error: `Path is a directory, not a file: ${resolvedPath}`, |
| 52 | }; |
| 53 | } |
| 54 | |
| 55 | // Validate file size |
| 56 | const sizeValidation = validateFileSize(fileStat); |
| 57 | if (sizeValidation) { |
| 58 | return { |
| 59 | success: false, |
| 60 | error: sizeValidation.error, |
| 61 | }; |
| 62 | } |
| 63 | |
| 64 | // Read full file content using runtime helper |
| 65 | let fullContent: string; |
| 66 | try { |
| 67 | fullContent = await readFileString(config.runtime, resolvedPath); |
| 68 | } catch (err) { |
| 69 | if (err instanceof RuntimeError) { |
| 70 | return { |
| 71 | success: false, |
| 72 | error: err.message, |