feat: add codex image tool (#650)

src/agent/approval-execution.ts

@@ -40,6 +40,7 @@ export function getDisplayableToolReturn(content: ToolReturnContent): string {
 const PARALLEL_SAFE_TOOLS = new Set([
   // === Anthropic toolset (default) ===
   "Read",
+  "view_image",
   "Grep",
   "Glob",
 

src/cli/helpers/formatArgsDisplay.ts

@@ -248,14 +248,14 @@ export function formatArgsDisplay(
           }
 
           // Read tools: show file path + any other useful args (limit, offset)
-          if (isFileReadTool(toolName) && parsed.file_path) {
+          if (isFileReadTool(toolName) && (parsed.file_path || parsed.path)) {
-            const filePath = String(parsed.file_path);
+            const filePath = String(parsed.file_path || parsed.path);
             const relativePath = formatDisplayPath(filePath);
 
             // Collect other non-hidden args
             const otherArgs: string[] = [];
             for (const [k, v] of Object.entries(parsed)) {
-              if (k === "file_path") continue;
+              if (k === "file_path" || k === "path") continue;
               if (v === undefined || v === null) continue;
               if (typeof v === "boolean" || typeof v === "number") {
                 otherArgs.push(`${k}: ${v}`);

src/cli/helpers/toolNameMapping.ts

@@ -15,6 +15,7 @@ export function getDisplayToolName(rawName: string): string {
   if (rawName === "write") return "Write";
   if (rawName === "edit" || rawName === "multi_edit") return "Update";
   if (rawName === "read") return "Read";
+  if (rawName === "view_image" || rawName === "ViewImage") return "View Image";
   if (rawName === "bash") return "Bash";
   if (rawName === "grep" || rawName === "Grep") return "Search";
   if (rawName === "glob" || rawName === "Glob") return "Glob";
@@ -180,6 +181,8 @@ export function isFileReadTool(name: string): boolean {
   return (
     name === "read" ||
     name === "Read" ||
+    name === "view_image" ||
+    name === "ViewImage" ||
     name === "ReadFile" ||
     name === "read_file" ||
     name === "read_file_gemini" ||

src/tools/descriptions/ViewImage.md

@@ -0,0 +1,8 @@
+# ViewImage
+
+Attach a local image file to the conversation context for this turn.
+
+Usage:
+- The `path` parameter must be an absolute path to a local image file
+- Supported formats: PNG, JPG, JPEG, GIF, WEBP, BMP
+- Large images are automatically resized to fit API limits

src/tools/impl/ViewImage.ts

@@ -0,0 +1,39 @@
+import * as path from "node:path";
+import { read, type ToolReturnContent } from "./Read";
+import { validateRequiredParams } from "./validation.js";
+
+interface ViewImageArgs {
+  path: string;
+}
+
+const IMAGE_EXTENSIONS = new Set([
+  ".png",
+  ".jpg",
+  ".jpeg",
+  ".gif",
+  ".webp",
+  ".bmp",
+]);
+
+function isImageFile(filePath: string): boolean {
+  const ext = path.extname(filePath).toLowerCase();
+  return IMAGE_EXTENSIONS.has(ext);
+}
+
+export async function view_image(
+  args: ViewImageArgs,
+): Promise<{ content: ToolReturnContent }> {
+  validateRequiredParams(args, ["path"], "view_image");
+
+  const userCwd = process.env.USER_CWD || process.cwd();
+  const resolvedPath = path.isAbsolute(args.path)
+    ? args.path
+    : path.resolve(userCwd, args.path);
+
+  if (!isImageFile(resolvedPath)) {
+    throw new Error(`Unsupported image file type: ${resolvedPath}`);
+  }
+
+  const result = await read({ file_path: resolvedPath });
+  return { content: result.content };
+}

src/tools/manager.ts

@@ -82,6 +82,7 @@ export const OPENAI_DEFAULT_TOOLS: ToolName[] = [
   "grep_files",
   "apply_patch",
   "update_plan",
+  "view_image",
   "Skill",
   "Task",
 ];
@@ -112,6 +113,7 @@ export const OPENAI_PASCAL_TOOLS: ToolName[] = [
   "ShellCommand",
   "Shell",
   "ReadFile",
+  "view_image",
   "ListDir",
   "GrepFiles",
   "ApplyPatch",
@@ -151,6 +153,7 @@ const TOOL_PERMISSIONS: Record<ToolName, { requiresApproval: boolean }> = {
   LS: { requiresApproval: false },
   MultiEdit: { requiresApproval: true },
   Read: { requiresApproval: false },
+  view_image: { requiresApproval: false },
   ReadLSP: { requiresApproval: false },
   Skill: { requiresApproval: false },
   Task: { requiresApproval: true },

src/tools/schemas/ViewImage.json

@@ -0,0 +1,12 @@
+{
+  "type": "object",
+  "properties": {
+    "path": {
+      "type": "string",
+      "description": "The absolute path to the image file"
+    }
+  },
+  "required": ["path"],
+  "additionalProperties": false,
+  "$schema": "http://json-schema.org/draft-07/schema#"
+}

src/tools/toolDefinitions.ts

@@ -29,6 +29,7 @@ import SkillDescription from "./descriptions/Skill.md";
 import TaskDescription from "./descriptions/Task.md";
 import TodoWriteDescription from "./descriptions/TodoWrite.md";
 import UpdatePlanDescription from "./descriptions/UpdatePlan.md";
+import ViewImageDescription from "./descriptions/ViewImage.md";
 import WriteDescription from "./descriptions/Write.md";
 import WriteFileGeminiDescription from "./descriptions/WriteFileGemini.md";
 import WriteTodosGeminiDescription from "./descriptions/WriteTodosGemini.md";
@@ -63,6 +64,7 @@ import { skill } from "./impl/Skill";
 import { task } from "./impl/Task";
 import { todo_write } from "./impl/TodoWrite";
 import { update_plan } from "./impl/UpdatePlan";
+import { view_image } from "./impl/ViewImage";
 import { write } from "./impl/Write";
 import { write_file_gemini } from "./impl/WriteFileGemini";
 import { write_todos } from "./impl/WriteTodosGemini";
@@ -97,6 +99,7 @@ import SkillSchema from "./schemas/Skill.json";
 import TaskSchema from "./schemas/Task.json";
 import TodoWriteSchema from "./schemas/TodoWrite.json";
 import UpdatePlanSchema from "./schemas/UpdatePlan.json";
+import ViewImageSchema from "./schemas/ViewImage.json";
 import WriteSchema from "./schemas/Write.json";
 import WriteFileGeminiSchema from "./schemas/WriteFileGemini.json";
 import WriteTodosGeminiSchema from "./schemas/WriteTodosGemini.json";
@@ -170,6 +173,11 @@ const toolDefinitions = {
     description: ReadDescription.trim(),
     impl: read as unknown as ToolImplementation,
   },
+  view_image: {
+    schema: ViewImageSchema,
+    description: ViewImageDescription.trim(),
+    impl: view_image as unknown as ToolImplementation,
+  },
   // LSP-enhanced Read - used when LETTA_ENABLE_LSP is set
   ReadLSP: {
     schema: ReadLSPSchema,