contract 3

Stamp a company seal onto a PDF — a contract seal on chosen pages, and a straddle seal split across every page edge so a swapped or removed page shows. Renders a seal image; it is not a cryptographic signature.

Contract check for DeepSeek Harness plugins: statically verifies that registered tools' output.render() returns ContentBlock[], and warns when a session event type falls outside the kernel vocabulary. Warn-only. 契约体检插件（不检测恶意）。

合同条款立场台账核对（按立场、风险等级与退让底线核对台账自洽，仅提示差异，不作出定性结论）