Cross-post to Instagram when channel post has an image

[SaharPak]

Context

Auto-publish image-based Telegram channel posts to Instagram.

Requirements

• Trigger only when channel post contains an image (Instagram requires visual content)
• Use Meta Graph API (Instagram Content Publishing)
• Adapt caption for Instagram (hashtags, shorter text, emojis)
• Support: single image posts, carousel (multiple images)

Setup needed

• Meta Business Suite account linked to Instagram
• Facebook Page connected to Instagram Professional account
• Graph API access token with instagram_content_publish permission

Limitations to handle

• Instagram requires an image — skip text-only posts
• No link support in captions (put link in bio or use stories)
• Rate limit: 25 posts per 24 hours

Acceptance Criteria

• Image posts auto-publish to Instagram
• Text-only posts are skipped gracefully
• Caption is adapted (hashtags, formatting)
• Errors logged without crashing bot