@startuml
skinparam backgroundColor #FFFFFF
skinparam defaultFontName Arial
skinparam defaultFontSize 14
skinparam shadowing false
title Tessera — local process and thread deployment
node "User computer" {
  artifact "Local agent client" as Agent
  node "Tessera desktop process" {
    node "GUI main thread\nwinit + softbuffer" as GUI
    node "tessera-agent-api\nHTTP receiver" as API
    node "tessera-endor-worker\nReplSession / Candidate / Aster heap" as Worker
    node "Input sender thread" as Input
    node "Lazy bounded I/O pool" as IO
    database "Arc<RwLock<NamespaceState>>\nno VM handles in published frames" as State
    API --> Worker : bounded queue (8 pending)
    Worker --> State : commit document
    State --> GUI : native snapshots
    GUI --> Input : Input values
    Input --> API : loopback HTTP
    Worker <--> IO : mailbox / cancellation
  }
  node "System curl subprocess" as Curl
  artifact "OS window + pixel buffer" as Window
  Agent --> API : 127.0.0.1:4737
  GUI --> Window
  IO --> Curl : fetchText transport
}
@enduml