QA Sweep — multi-lens agent QA of the live product

Read projects/<name>/qa/README.md FIRST (the protocol SSOT: environment rules · the five lens briefs · findings format · triage) — the lens briefs in agent prompts come verbatim from there, and the account/mutation policy it sets is a hard rail, not advice. If that file doesn't exist yet, create it from the layer's protocol template (${CLAUDE_PLUGIN_ROOT}/reference/qa-PROTOCOL-TEMPLATE.md in the kit repo — copy it from there if this project only adopted the layer's .claude/ files) and fill the placeholders before sweeping.