Install Deterministic Regular Expression Tool for DeepSeek Harness with dsh-tool-regex

The community plugin `dsh-tool-regex` registers regex tools for DeepSeek Harness: test matching, extract capture groups, secure replacement, and static interpretation without executing code. This article verifies the installation command, four actions, ReDoS hard timeout and input limits against the catalog page and GitHub source code, and notes that the web and headless profiles require separate installations. Maintainer: omdsh-dev, licensed under MIT.