Recall provider-specific prompt-caching signals and separate them from provider-neutral design habits.
OpenAI Where do you look for OpenAI prompt-cache hits? Look for cached input tokens in prompt token usage details, such as cached_tokens. Also check whether the prompt is long enough to qualify. Anthropic "Why not add cache breakpoints everywhere?" Why not add cache breakpoints everywhere? A teammate wants explicit controls without boundaries. Your line Breakpoints are useful when they follow real reusable sections. First define static, semi-static, and dynamic blocks. Random breakpoints create confidence theater; they do not fix mixed content. It ties the knob to the content model. Gemini Implicit caching vs explicit cache design Automatic features still reward…
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