@startuml skinparam backgroundColor #f5efe2 skinparam shadowing false skinparam class { BackgroundColor #fdfaf0 BorderColor #b8a982 ArrowColor #6e5d3d FontName "Helvetica" } skinparam note { BackgroundColor #f0e3c4 BorderColor #b8a982 } hide empty members class "Quiet Hours System" as quiet_hours_system <<system>> #2c4a6b class "Individual Contributor" as individual_contributor <<actor>> class "Engineering Manager" as engineering_manager <<actor>> class "Calendar API" as calendar_api <<block>> class "Meeting Request" as meeting_request <<block>> class "Read-write Google Calendar and Outlook (Microsoft Graph) integration" as readwrite_integration <<constraint>> { } class "Must respect timezone differences explicitly in proposals" as timezone_respect <<constraint>> { } class "No automatic blocking without user confirmation for the first 30 days (build trust)" as initial_trust_period <<constraint>> { } individual_contributor --> quiet_hours_system engineering_manager --> quiet_hours_system quiet_hours_system *-- calendar_api meeting_request --> quiet_hours_system readwrite_integration ..> quiet_hours_system : applies_to timezone_respect ..> quiet_hours_system : applies_to initial_trust_period ..> quiet_hours_system : applies_to legend right **Requirements** **REQ-001** — The system must ensure the user reliably gets at least 2 contiguous deep-work blocks per week. **REQ-002** — The system must achieve this without costing the user political capital. endlegend @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art