Fix our AI video clip pipeline: faster, fewer errors

We make short-form product videos with AI. I built an internal app (with Claude Code) that plans videos, generates AI clips through Higgsfield, edits them with ffmpeg, and prepares them for posting. Clip generation was too slow and failed too often, so it is currently switched off. YOUR JOB: FIX IT. Not a report. Working results. THE APP Python (FastAPI), plain JavaScript, Supabase (Postgres and storage), Vercel, and a background worker on a cloud Mac. There is a detailed handoff doc, and I will give you our current numbers on clip speed and failures. WHAT "DONE" MEANS - Clip generation is back on and works. - Clips are generated in parallel, not one at a time. - Failed clips retry automatically, and we never pay twice for the same clip. - When something fails, the app shows a clear reason. - We run a test batch of clips for one product (up to 20, credits approved in advance) and it is clearly faster with fewer failures than our current numbers. Payment is released when the test batch works. YOUR ROLE Your job is to build it. I handle the creative side. I will give you a full roadmap of what good videos look like (reference videos, shot-by-shot breakdowns, our creative rules, and examples of good versus bad output) so you have the context while you build. You do not need short-form video experience. If this goes well, there may be a larger follow-on project, possibly worth a few thousand dollars, to connect the full flow (concept, clips, edit, ready to post) in one place. YOU ARE A FIT IF YOU - Have built with AI image or video generation APIs (Higgsfield, Runway, Kling, fal.ai, Replicate or similar). - Know how to make slow, flaky external services reliable. - Work in Python and Postgres, and use Claude Code or similar AI coding tools. - Explain things in plain language to a non-technical owner. TO APPLY - Start your proposal with the word "CLIPS" so I know you read this. - Link to something real you built with an AI image or video API (a live product, a GitHub repo, or a demo video). - Include a 1 to 2 minute video (Loom or similar) of you explaining how you would approach this job. Proposals without these will not be reviewed. Budget: $500 fixed, paid when the test batch works.