fix(social-reddit): send URL for image submissions

packages/social/reddit/src/index.test.ts

@@ -90,4 +90,62 @@ describe('social-reddit posting', () => {
       subreddit: 'sh1pt',
     })).rejects.toThrow('RATELIMIT: you are doing that too much');
   });
+
+  it('submits image posts with the image URL payload', async () => {
+    const fetchMock = vi.spyOn(globalThis, 'fetch').mockResolvedValue({
+      ok: true,
+      status: 200,
+      json: async () => ({
+        json: {
+          data: {
+            id: 'img123',
+            url: 'https://www.reddit.com/r/sh1pt/comments/img123/image_drop/',
+          },
+          errors: [],
+        },
+      }),
+    } as any);
+
+    const ctx = {
+      ...fakeConnectContext({ REDDIT_ACCESS_TOKEN: 'reddit-token' }),
+      dryRun: false,
+    };
+
+    await adapter.post(ctx as any, {
+      title: 'Image drop',
+      body: 'Fallback body',
+      link: 'https://cdn.example.com/release.png',
+    }, {
+      subreddit: 'sh1pt',
+      kind: 'image',
+    });
+
+    const body = new URLSearchParams(String((fetchMock.mock.calls[0]?.[1] as RequestInit).body));
+    expect(Object.fromEntries(body)).toMatchObject({
+      api_type: 'json',
+      kind: 'image',
+      sr: 'sh1pt',
+      title: 'Image drop',
+      url: 'https://cdn.example.com/release.png',
+    });
+    expect(body.has('text')).toBe(false);
+  });
+
+  it('rejects image posts without a public image URL', async () => {
+    const fetchMock = vi.spyOn(globalThis, 'fetch');
+    const ctx = {
+      ...fakeConnectContext({ REDDIT_ACCESS_TOKEN: 'reddit-token' }),
+      dryRun: false,
+    };
+
+    await expect(adapter.post(ctx as any, {
+      title: 'Image drop',
+      body: 'Fallback body',
+    }, {
+      subreddit: 'sh1pt',
+      kind: 'image',
+    })).rejects.toThrow('post.link');
+
+    expect(fetchMock).not.toHaveBeenCalled();
+  });
 });

packages/social/reddit/src/index.ts

@@ -85,14 +85,15 @@ export default defineSocial<Config>({
 
 function formatSubmitBody(post: { title?: string; body: string; link?: string }, config: Config): URLSearchParams {
   const kind = config.kind ?? (post.link ? 'link' : 'self');
+  if (kind === 'image' && !post.link) throw new Error('Reddit image submissions require post.link to contain a public image URL');
   const body = new URLSearchParams({
     api_type: 'json',
     kind,
     sr: config.subreddit,
     title: post.title ?? '',
   });
   if (config.flairId) body.set('flair_id', config.flairId);
-  if (kind === 'link') {
+  if (kind === 'link' || kind === 'image') {
     body.set('url', post.link ?? post.body);
   } else {
     body.set('text', post.body.slice(0, 40_000));