dsh-frecency: A Persistent Index and Frecency-Based File Search Plugin for DeepSeek Harness

`dsh-frecency` is a plugin for DeepSeek Harness that addresses performance bottlenecks caused by frequent process spawning in the built-in `grep` and `glob` tools. By using a resident in-memory index and a frecency-based ranking mechanism, it significantly improves file search efficiency. It overrides the original tool names and schemas, allowing models to use it seamlessly without modifying prompts. The plugin supports semantically equivalent `glob`, search results annotated with Git status, and graceful degradation. Installation requires Node.js >= 22 and is compatible with DSH versions 0.1.2-alpha.3 through 0.2.1-alpha.1.