Verdict
A scheduling MVP for one or two channels is doable. 'Buffer for all social' dies in API access and compliance, not in UI.
What you can rebuild
Compose posts, schedule to a queue, and publish to 1-2 channels via APIs (for example LinkedIn and X if keys allow). Calendar view of scheduled content.
What stays hard
Every network's API quirks, approval workflows for agencies, analytics depth, and ToS risk when automating Instagram/Facebook.
Starter prompt
Build a Buffer-like social scheduler called QueuePost for LinkedIn and X (Twitter). Users connect accounts via OAuth where possible, write posts, schedule date/time, see a queue calendar, and publish automatically via a cron/worker. Stack: Next.js, Tailwind, Supabase, background job runner. Clear composer UI with character counts.
Follow-up prompt
Add: media upload (image), first-comment field, post templates, and a weekly analytics snapshot (impressions/likes if the APIs provide them). Document API limitations in the UI.
Build it with these tools
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Reference product: buffer.com. We are not affiliated. Prompts build inspired MVPs, not trademarked clones for commercial misuse.