Cross-preset session migration for DeepSeek Harness: fixed-schema handoff summaries instead of bypassing the preset lock. 26-run benchmark + A/B evidence. 跨 preset 会话迁移插件（固定 schema 交接摘要），含实测 benchmark 与 A/B 对照。
dsh plugin --profile web add github:Totoro-qaq/dsh-plugin-bridge