DSH Tetris Plugin: dsh-tetris

The DeepSeek Harness plugin `dsh-tetris` embeds classic Tetris in the web sidebar. The game features core mechanics such as 7-bag randomization, SRS rotation, ghost pieces, and lock delay, and supports full-screen play and sound effects. Scores are stored using localStorage, and a shared cross-player leaderboard is implemented with kvdb.io. To install, run `dsh plugin --profile web add dsh-tetris`. Note that the KV service does not provide SLA guarantees, client-reported scores carry anti-cheating risks, and offline scores are stored locally for later.