Compose original single-native E1 E2 Nexus modules and skills

game/nexus-module-profile.ts

@@ -1,6 +1,6 @@
 import { FACTIONS } from './catalog';
 import type { FactionModuleProfile } from './faction-module-profile';
-import { classicDiscoveryNexusProfile, pairedDiscoveryNexusProfile, standaloneE3DiscoveryNexusProfile } from './discovery-module-profile';
+import { classicDiscoveryNexusProfile, pairedDiscoveryNexusProfile, singleE1E2DiscoveryNexusProfile, standaloneE3DiscoveryNexusProfile } from './discovery-module-profile';
 
 /** Original classic Nexus modules, optionally Homeworlds; initializer checks undealt components. */
 export function classicNexusModulesProfile(game: FactionModuleProfile): boolean {
@@ -88,3 +88,30 @@ export function standaloneE3NexusProfile(game: FactionModuleProfile): boolean {
   }
   return native !== null && !(game.advanced && native === 'moritani' && harkonnen);
 }
+
+/** Exactly one original E1/E2 native/classics without Skills, with optional original modules. */
+export function singleE1E2NexusProfile(game: FactionModuleProfile): boolean {
+  if (game.discoveryEnabled || game.discoveries) return singleE1E2DiscoveryNexusProfile(game);
+  if (typeof game.advanced !== 'boolean' || !game.nexusCards ||
+    game.expansions.length !== 1 || game.players.length < 2 || game.players.length > 6 ||
+    (game.techTokens && game.players.length < 3) ||
+    (game.strongholdCards && !game.advanced) || game.leaderSkills ||
+    game.discoveryEnabled || game.discoveries || game.discoveryStash || game.greatMaker ||
+    game.ecazTreachery || game.semutaPreview || game.advancedPreview ||
+    game.kullPreview || game.nexusKullPreview || game.guildBetrayalPreview ||
+    game.richeseBetrayalPreview || game.nexusIxianReplacementPreview ||
+    game.nexusIxianBetrayalPreview || game.nexusHarkonnenBetrayalPreview) return false;
+  const expansion = game.expansions[0];
+  if (expansion !== 'ix' && expansion !== 'choam') return false;
+  let native = 0;
+  for (let i = 0; i < game.players.length; i++) {
+    const player = game.players[i];
+    for (let j = 0; j < i; j++) if (player.faction === game.players[j].faction) return false;
+    let family: string | undefined;
+    for (const faction of FACTIONS)
+      if (faction.id === player.faction) { family = faction.expansion; break; }
+    if (family !== 'base' && family !== expansion) return false;
+    if (family === expansion) native++;
+  }
+  return native === 1;
+}