---
id: defeff90-dfdb-435e-a6e0-e99d096f8b8d
title: serve serves og.png as octet-stream
state: closed
labels:
- area:render
assignees: []
milestone: null
created: 2026-10-27T18:08:32.955063267Z
updated: 2026-10-27T18:20:51.918149063Z
---
## What

`serve` does not have a `.png` (or common image) branch in `content_type_for`; `dist/og.png` is served as `application/octet-stream`.

`src/serve.rs:446-477`.

## Reproduced

```
curl -I http://127.0.0.1:PORT/og.png
HTTP/1.1 200 OK
Content-Type: application/octet-stream
```

Pages/static hosts serve `image/png`. Social scrapers may ignore the preview image when the MIME type is octet-stream, and `serve` is no longer single-shape with Pages.

## Impact

Social-card/OG preview parity regression; minor client behavior difference.

## Fix

Add common image MIME types (`png`, `jpg`/`jpeg`, `gif`, `webp`, `ico`) to `content_type_for`; add a content-type test for `og.png`.