Weekend Dev Log: Testing a Free-Tier AI Demo Against Four Injected Faults

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A developer built a small side project that turns a changelog into three support-friendly bullets using a free model endpoint. Rather than focusing on the feature itself, most of the weekend went into a roughly 60-line rehearsal suite that deliberately simulates rate limiting, hangs, and malformed responses. The suite checks that the demo reports a degraded state instead of crashing with a server error. The author reasoned that a demo working only when the endpoint is healthy is unreliable, since both the model access and hosting were free options with no availability guarantees. To keep scope manageable, the project cut features needing databases or extra network hops, and it replaced retry logic with a single attempt plus a fallback banner.

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