PR #19037 — real Expo prebuild before/after evidence
Repository: https://github.com/pingdotgg/t3code/pull/19037
Before: main f740a97947cc701859040e530e7fe07b96d02ae5
After: 15460af9e5775db7b84c1d4d8d92c2832b82d930
Command (app directory, development variant):
  APP_VARIANT=development npx expo prebuild --clean --platform ios --no-install
Then parse ios/T3CodeDev.xcodeproj/project.pbxproj using the installed xcode library.

BEFORE: generated project has one Info.plist UUID owned by two extension groups.
{
  "plistReferences": [
    {
      "id": "13B07FB61A68108700A75B9A",
      "path": "T3CodeDev/Info.plist",
      "groups": [
        {
          "id": "13B07FAE1A68108700A75B9A",
          "name": "T3CodeDev"
        }
      ]
    },
    {
      "id": "65974ABC2DEE4BDDA408BE84",
      "path": "\"Info.plist\"",
      "groups": [
        {
          "id": "3A08EF019A504E2EBEF701C1",
          "name": "ExpoWidgetsTarget"
        },
        {
          "id": "9AF83E61169341F584AEBB84",
          "name": "expo-sharing-extension"
        }
      ]
    }
  ],
  "sharedReferenceCount": 1,
  "targetPlists": [
    {
      "configuration": "Debug",
      "path": "T3CodeDev/Info.plist"
    },
    {
      "configuration": "Release",
      "path": "T3CodeDev/Info.plist"
    },
    {
      "configuration": "Debug",
      "path": "ExpoWidgetsTarget/Info.plist"
    },
    {
      "configuration": "Release",
      "path": "ExpoWidgetsTarget/Info.plist"
    },
    {
      "configuration": "Debug",
      "path": "\"expo-sharing-extension/Info.plist\""
    },
    {
      "configuration": "Release",
      "path": "\"expo-sharing-extension/Info.plist\""
    }
  ]
}

AFTER: generated project has three Info.plist references, each owned by one group.
{
  "plistReferences": [
    {
      "id": "13B07FB61A68108700A75B9A",
      "path": "T3CodeDev/Info.plist",
      "groups": [
        {
          "id": "13B07FAE1A68108700A75B9A",
          "name": "T3CodeDev"
        }
      ]
    },
    {
      "id": "1E1B2142EEAE49E687B12FF5",
      "path": "\"Info.plist\"",
      "groups": [
        {
          "id": "F363385BDF3A44E1B2FB5ECA",
          "name": "ExpoWidgetsTarget"
        }
      ]
    },
    {
      "id": "DD545732821E48F49DA824D6",
      "path": "Info.plist",
      "groups": [
        {
          "id": "8FC8645DB46744DF9C761B0C",
          "name": "expo-sharing-extension"
        }
      ]
    }
  ],
  "sharedReferenceCount": 0,
  "targetPlists": [
    {
      "configuration": "Debug",
      "path": "T3CodeDev/Info.plist"
    },
    {
      "configuration": "Release",
      "path": "T3CodeDev/Info.plist"
    },
    {
      "configuration": "Debug",
      "path": "ExpoWidgetsTarget/Info.plist"
    },
    {
      "configuration": "Release",
      "path": "ExpoWidgetsTarget/Info.plist"
    },
    {
      "configuration": "Debug",
      "path": "\"expo-sharing-extension/Info.plist\""
    },
    {
      "configuration": "Release",
      "path": "\"expo-sharing-extension/Info.plist\""
    }
  ]
}

PASS: sharedReferenceCount 1 -> 0; all six target INFOPLIST_FILE entries unchanged.
The independent real Expo widget + sharing mod behavioral probe fails before,
and passes against both installed shipped JS and TS-derived JS after.

Verification limit: project generation on Linux; no Xcode 27.2 native build,
installation, simulator execution, or runtime share-flow verification is claimed.