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docs/architecture/ created with README (boundary rule vs docs/adr + regeneration guide) and c4-context.md — a C4Context diagram of Лидерра: 2 actors, the system, 5 external systems (crm.bp-gr.ru, Unisender Go, Yandex 360, Sentry, JivoSite). Smoke #3 (mermaid-skill): discoverable, authored a valid C4Context block per references/c4.md. Smoke #4 (architecture-patterns): installed + enabled + discoverable (Skills(1), Hooks(0)). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>