DeepSeek Harness Plugin: CacheScope - Prompt Caching Observability and Input Diagnostics

CacheScope is a local debugging plugin for DeepSeek Harness (DSH) designed to address the challenge of locating low prompt cache hit rates. It provides a desktop dashboard that displays Provider-reported cache token usage in real time, along with diagnostic features such as comparing two dialogue turns, inspecting differences between adjacent inputs, and visualizing a color-coded input tree. Data can be filtered by session, model, and other criteria. Installation is straightforward, and by default, the plugin retains only the most recent 12 inputs. Note: Data exists only in local memory and cannot be used for cross-session comparisons after restarting the process.