From ccd35d5791162ac21c8c7055aadfbc1f81f35fcd Mon Sep 17 00:00:00 2001
From: unknown <>
Date: Wed, 8 Jul 2026 17:03:45 +0000
Subject: [PATCH] docs(openrouter-images): media_type now set whenever image
 format is identifiable

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---
 skills/openrouter-images/SKILL.md       | 4 ++--
 skills/openrouter-images/scripts/lib.ts | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/skills/openrouter-images/SKILL.md b/skills/openrouter-images/SKILL.md
index 52e1c25..92be28a 100644
--- a/skills/openrouter-images/SKILL.md
+++ b/skills/openrouter-images/SKILL.md
@@ -144,12 +144,12 @@ The generation cost (USD) is printed to stderr when the API reports it. When `--
 
 Generation uses `POST /api/v1/images`. See the [Image Generation guide](https://openrouter.ai/docs/guides/overview/multimodal/image-generation) for full request/response details.
 
-Images come back base64-encoded in a `data` array. For raster PNG output, `media_type` is omitted; vector outputs (e.g. SVG) include it, and the saved file extension follows it:
+Images come back base64-encoded in a `data` array. Each entry includes `media_type` (e.g. `image/png`, `image/jpeg`, `image/webp`, `image/svg+xml`) whenever the format is identifiable; it's omitted only when the format couldn't be determined. The saved file extension follows it:
 
 ```json
 {
   "created": 1748372400,
-  "data": [{ "b64_json": "<base64-encoded image data>" }],
+  "data": [{ "b64_json": "<base64-encoded image data>", "media_type": "image/png" }],
   "usage": { "prompt_tokens": 0, "completion_tokens": 4175, "total_tokens": 4175, "cost": 0.04 }
 }
 ```
diff --git a/skills/openrouter-images/scripts/lib.ts b/skills/openrouter-images/scripts/lib.ts
index d779802..cf91452 100644
--- a/skills/openrouter-images/scripts/lib.ts
+++ b/skills/openrouter-images/scripts/lib.ts
@@ -144,7 +144,8 @@ const MEDIA_TYPE_EXTENSIONS: Record<string, string> = {
 
 /**
  * Save one base64 image. The extension follows the response `media_type` when
- * present (e.g. SVG from vector models), otherwise the requested output path.
+ * present (set whenever the format is identifiable), otherwise the requested
+ * output path.
  */
 export function saveImage(b64: string, outputBase: string, mediaType: string | undefined, index: number, total: number): string {
   const dotIdx = outputBase.lastIndexOf(".");