PlantUML Web Server

@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 "Aristotle" as aristotle <<system>> #2c4a6b {
  session_history : string
  user_profile : string
}
class "Undergraduate Student" as undergraduate_student <<actor>> {
  course_enrollment : string
  academic_level : enum{first-year}
}
class "Coursework Material" as coursework_material <<block>> {
  subject_area : string
  problem_set : boolean
}
class "Thinking Partner Session" as thinking_partner_session <<block>> {
  interaction_log : string
  prompt_history : string
}

class "Must never output a complete solution to a graded problem" as must_never_output_solution <<constraint>> {
}
class "Response latency under 1.2s P50 to preserve flow" as latency_p50 <<constraint>> {
}
class "FERPA tenancy — coursework never leaves institutional boundary" as ferpa_tenancy <<constraint>> {
}

undergraduate_student --> aristotle : interacts_with
aristotle --> coursework_material : processes
undergraduate_student *-- thinking_partner_session : participates_in
must_never_output_solution ..> aristotle : applies_to
latency_p50 ..> aristotle : applies_to
ferpa_tenancy ..> aristotle : applies_to
ferpa_tenancy ..> coursework_material : applies_to

legend right
  **Requirements**
  **REQ-001** — The system must facilitate low-stakes re-engagement with material.
  **REQ-002** — The system must guide the student without providing final solutions.
endlegend
@enduml

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