syntax = "proto3";

package quixos.runtime;

import "camino/api.proto";
import "quixos/refs.proto";

service PackageRuntime {
  rpc Handshake(HandshakeRequest) returns (HandshakeResponse);
  rpc Invoke(InvokeRequest) returns (InvokeResponse);
  rpc Watch(WatchRequest) returns (stream WatchEvent);
  rpc GetInvocationStatus(InvocationControlRequest) returns (InvocationStatus);
  rpc CancelInvocation(InvocationControlRequest) returns (InvocationStatus);
}

message HandshakeRequest {
  string orch_protocol_version = 1;
  string nonce = 2;
}
message HandshakeResponse {
  string package_revision_id = 1;
  string runtime_protocol_version = 2;
  repeated string export_ids = 3;
  string instance_id = 4;
  string authentication_proof = 5;
  repeated string capabilities = 6;
}

message InvocationContext {
  string workspace_epoch = 1;
  string instance_id = 2;
  string binding_digest = 3;
  string grant = 4;
  string session_id = 5;
  // Host-selected owner; packages must not invent workspace-local ownership.
  string owner_conformance_id = 6;
}
message InvocationControlRequest {
  string invocation_id = 1;
}
message InvocationStatus {
  string invocation_id = 1;
  // unknown, running, cancellation-requested, completed, failed
  string state = 2;
}

message InvokeRequest {
  string invocation_id = 1;
  quixos.PackageExportRef export = 2;
  string object_id = 3;
  map<string, camino.Value> input = 4;
  repeated quixos.InjectedDependency dependencies = 5;
  InvocationContext context = 6;
}
message InvokeResponse {
  bool ok = 1;
  camino.Value result = 2;
  string error = 3;
  repeated DerivedDependency dependencies = 4;
}

message WatchRequest {
  string invocation_id = 1;
  quixos.PackageExportRef export = 2;
  string object_id = 3;
  map<string, camino.Value> input = 4;
  repeated quixos.InjectedDependency dependencies = 5;
  InvocationContext context = 6;
}

message DerivedDependency {
  string kind = 1;
  string object_id = 2;
  string attachment_id = 3;
  string projection_id = 4;
}

message WatchEvent {
  string watch_id = 1;
  camino.Value value = 2;
  repeated DerivedDependency dependencies = 3;
  string error = 4;
  bool initial = 5;
}