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Witness — the quality gate for agent-built web apps. Independent browser acceptance testing: CLI, MCP, AI-drafted checklists, visual regression, multi-browser. Agents self-test and pass; real browsers tell the truth.

密码本 for the DeepSeek Harness: an end-to-end encrypted personal secrets book on a private gist (age format, node:crypto only), with a browser page for people and value-free tools for the agent.