NoAtMark Text Cleaning Plugin: A Text Hygiene Toolkit Under DSH

The `noatmark-dsh-plugin` is a DeepSeek Harness (DSH) plugin designed to address hygiene and security concerns when agents process text. It encapsulates the cleaning capabilities of `noatmark.com` as a local tool, providing four core functions: removing invisible characters (including zero-width characters), scanning hidden content, cleaning residual LLM formatting artifacts, and escaping CSV injection risks. The plugin ensures that all processing is performed locally, supports installation via configuration files and invocation through natural language, and guarantees data privacy and deterministic processing.