flowchart TB
  subgraph ui ["Controllers — protocol-agnostic"]
    breakCtl[breakCtl]
    debugInfoCtl[debugInfoCtl]
    consoleCtl[consoleCtl]
    stopped[stopped / code_nav]
    inferiorIO[inferiorIOCtl]
  end

  subgraph shared ["Shared domain"]
    models["models.* · BreakInfo StackFrame ThreadInfo"]
    debuggerPkg["debugger.* · StopInfo ConsoleUpdate InferiorIO"]
  end

  subgraph api ["Backend interface"]
    BackendIface[backend.Backend]
    Capabilities["Capabilities · NavigationAsync WireCLILineTap DeferBreakpointRefresh …"]
    SemanticOps["Semantic ops · InsertBreakpoint SelectFrame Exec FetchStackList …"]
  end

  subgraph gdb_impl ["GDBBackend"]
    GdbCLI["CLI PTY → GDBWidget"]
    GdbMI["MI PTY → GdbInputState"]
    GdbOps["MI strings inside backend only"]
  end

  subgraph dlv_impl ["DLVBackend"]
    DlvCLI["dlv connect PTY → human console"]
    DlvRPC["go-delve rpc2 → machine ops"]
    DlvParse["dlv.InputState → ConsoleUpdate"]
  end

  ui --> BackendIface
  ui --> models
  ui --> debuggerPkg
  BackendIface --> Capabilities
  BackendIface --> SemanticOps
  BackendIface --> gdb_impl
  BackendIface --> dlv_impl
  inferiorIO --> debuggerPkg