dsh-experience-map: Evidence-Driven Experience Memory for DeepSeek Harness

The `dsh-experience-map` plugin for DeepSeek Harness is designed to address unreliable experiential memory and process-reuse risks in agent development. It uses SQLite to convert session evidence into structured, versioned Experience records, enabling applicability checks and user approval requests before reuse. The plugin provides core capabilities such as evidence governance, persistent storage, and headless operation; experiences must be saved manually or managed via CLI, and local dense retrieval is supported.