pdf support in read tool (#5222)

Co-authored-by: ammi1378 <ammi1378@users.noreply.github.com>

packages/opencode/src/tool/read.ts

@@ -7,7 +7,6 @@ import { FileTime } from "../file/time"
 import DESCRIPTION from "./read.txt"
 import { Filesystem } from "../util/filesystem"
 import { Instance } from "../project/instance"
-import { Provider } from "../provider/provider"
 import { Identifier } from "../id/id"
 import { Permission } from "../permission"
 import { Agent } from "@/agent/agent"
@@ -94,15 +93,11 @@ export const ReadTool = Tool.define("read", {
       throw new Error(`File not found: ${filepath}`)
     }
 
-    const isImage = isImageFile(filepath)
-    const model = ctx.extra?.model as Provider.Model | undefined
-    const supportsImages = model?.capabilities.input.image ?? false
-    if (isImage) {
-      if (!supportsImages) {
-        throw new Error(`Failed to read image: ${filepath}, model may not be able to read images`)
-      }
+    const isImage = file.type.startsWith("image/")
+    const isPdf = file.type === "application/pdf"
+    if (isImage || isPdf) {
       const mime = file.type
-      const msg = "Image read successfully"
+      const msg = `${isImage ? "Image" : "PDF"} read successfully`
       return {
         title,
         output: msg,
@@ -164,25 +159,6 @@ export const ReadTool = Tool.define("read", {
   },
 })
 
-function isImageFile(filePath: string): string | false {
-  const ext = path.extname(filePath).toLowerCase()
-  switch (ext) {
-    case ".jpg":
-    case ".jpeg":
-      return "JPEG"
-    case ".png":
-      return "PNG"
-    case ".gif":
-      return "GIF"
-    case ".bmp":
-      return "BMP"
-    case ".webp":
-      return "WebP"
-    default:
-      return false
-  }
-}
-
 async function isBinaryFile(filepath: string, file: Bun.BunFile): Promise<boolean> {
   const ext = path.extname(filepath).toLowerCase()
   // binary check for common non-text extensions