dsh-namecheck: DeepSeek Harness Brand Name and Domain Availability Check Plugin

DeepSeek Harness (DSH) offers the `dsh-namecheck` plugin, which addresses agent naming and domain validation needs through an “everything is a plugin” architecture. Maintained by HULILI-com, it automatically detects naming intent in conversations and provides domain registration status checks and trademark screening. Key capabilities include authoritative domain lookups via Verisign/RDAP (defaulting to `.com`, with multi-TLD support) and trademark screening, which can use third-party APIs or Bing heuristic search as a fallback. The plugin is simple to install, requires no API key, and has no third-party runtime dependencies. Users should note the limitations of registration-status determination and trademark screening.