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Self-contained briefing for a fresh Claude Code session picking up work on this project from a Windows machine running VS 2022. Covers: - TL;DR + 4 features - MailRouter API contract + EspoCRM endpoints - Tech stack (locked decisions) - Repo layout + current state - Step-by-step recipe to regenerate the VSTO host project from the template (the hand-written csproj is incompatible with VS) - Conventions + deferred work + open risks Read this before doing anything: docs/PROJECT-BRIEFING.md. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>