dsh-housekeeper: DSH Environment Manager Plugin

DSH-housekeeper is a Web plugin for DeepSeek Harness designed to unify the management of the platform's local state. This plugin operates without additional services on a local loopback address, with core features including toolchain inventory, controlled cache cleaning, and machine rule editing. Firstly, it can automatically detect the location and version of key tools such as Node and Git, performing only read-only reports. Secondly, it provides cache scanning and a two-step cleanup mechanism: users can preview details of temporary directories, generate a cleanup plan containing approve and deny paths, and refrain from deleting any files until confirmation. The cleanup execution utilizes a one-time and five-minute expiring token, strictly restricting the whitelist to prevent accidental deletion or path traversal. Additionally, it supports editing the AGENTS.md file, automatically backing it up upon saving and supporting one-click restoration, although a 64KB size limit must be noted. The plugin is accessible via a simple CLI...