Initial DeepSeek Harness community release. Implements slashx.request.v1 and slashx.response.v1, rich media delivery, asynchronous callbacks, idempotent run persistence, security limits, per-run billing, and complete token metering across cache usage, retries, and subagents. Install directly with: dsh plugin --profile web add github:superslash-rico/dsh-plugin-slashx-gateway. DeepSeek Harness remains in Developer Preview; review the README deployment and compatibility boundaries before production use.