Developer details nine critical failures building an image SaaS on Cloudflare Workers

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A developer spent a week building Album Art Creator, a tool that generates music release cover art using AI image models, running entirely on Cloudflare Workers with TanStack Start, D1, and R2. During the build, nine unexpected technical failures each consumed between one hour and a full day to resolve. Key issues included cron jobs silently failing to deploy because the worker entry point was misconfigured, and Cloudflare Turnstile bot-protection tokens breaking on the first production day since they are single-use and anonymous sessions require multiple protected calls. The developer resolved the Turnstile issue by minting a signed, fingerprint-bound HMAC cookie after the first successful verification, allowing subsequent calls to bypass repeated token checks. The post serves as a practical troubleshooting reference for developers building production SaaS products on Cloudflare's edge infrastructure using newer, less-documented framework integrations.

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