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+{
+  "nbformat": 4,
+  "nbformat_minor": 0,
+  "metadata": {
+    "colab": {
+      "provenance": []
+    },
+    "kernelspec": {
+      "name": "python3",
+      "display_name": "Python 3"
+    },
+    "language_info": {
+      "name": "python"
+    }
+  },
+  "cells": [
+    {
+      "cell_type": "code",
+      "source": [
+        "# Manual SHA256 Verification Tool for WFGY TXT File\n",
+        "# ==================================================\n",
+        "# Purpose:\n",
+        "#   - Upload your local TXT file (e.g. WFGY-3.0_Singularity-Demo_AutoBoot_SHA256-Verifiable.txt)\n",
+        "#   - Compute its SHA256 hash manually\n",
+        "#   - Compare it with the official hash published on GitHub\n",
+        "#\n",
+        "# When to use this:\n",
+        "#   - When an AI assistant cannot verify the file hash directly (e.g. no direct file access)\n",
+        "#   - To double-check file integrity yourself in a trusted environment\n",
+        "#   - Useful if filenames differ but you suspect the content is the same\n",
+        "#\n",
+        "# Official reference (from https://github.com/onestardao/WFGY README):\n",
+        "#   - Expected SHA256: 58dbd432db3e6494364557257f7ce068eb59bdd039995dff4c281d655f7d464f\n",
+        "#\n",
+        "# Instructions:\n",
+        "#   1. Run this cell\n",
+        "#   2. Click \"Choose Files\" to upload your TXT\n",
+        "#   3. Wait for the hash to be computed and compared\n",
+        "#   4. If hashes match → your file content is identical to the official one (byte-for-byte)\n",
+        "#   5. If not → content differs (possible reasons: edits, different line endings, encoding changes)\n",
+        "#\n",
+        "# ==================================================\n",
+        "\n",
+        "from google.colab import files\n",
+        "import hashlib\n",
+        "\n",
+        "print(\"=== Manual SHA256 Verification for WFGY TXT File ===\")\n",
+        "print(\"Upload your TXT file now...\\n\")\n",
+        "\n",
+        "# Step 1: Upload the file\n",
+        "uploaded = files.upload()\n",
+        "\n",
+        "# Get the filename of the uploaded file (takes the first one if multiple)\n",
+        "filename = list(uploaded.keys())[0]\n",
+        "print(f\"\\nUploaded file: {filename}\")\n",
+        "\n",
+        "# Step 2: Compute SHA256 hash\n",
+        "def compute_sha256(file_path):\n",
+        "    sha256 = hashlib.sha256()\n",
+        "    with open(file_path, \"rb\") as f:\n",
+        "        # Read in chunks to handle large files safely\n",
+        "        for chunk in iter(lambda: f.read(65536), b\"\"):\n",
+        "            sha256.update(chunk)\n",
+        "    return sha256.hexdigest()\n",
+        "\n",
+        "file_hash = compute_sha256(filename)\n",
+        "print(\"\\nYour file's SHA256 hash:\")\n",
+        "print(file_hash)\n",
+        "\n",
+        "# Step 3: Official hash from GitHub (do NOT change this value manually)\n",
+        "official_hash = \"58dbd432db3e6494364557257f7ce068eb59bdd039995dff4c281d655f7d464f\"\n",
+        "\n",
+        "print(\"\\nOfficial SHA256 from GitHub README:\")\n",
+        "print(official_hash)\n",
+        "\n",
+        "# Step 4: Comparison result\n",
+        "print(\"\\nResult:\")\n",
+        "if file_hash == official_hash:\n",
+        "    print(\"✅ MATCH! Your uploaded file has exactly the same content as the official version.\")\n",
+        "    print(\"   (Even if the filename is different, the raw bytes are identical.)\")\n",
+        "else:\n",
+        "    print(\"❌ DO NOT MATCH!\")\n",
+        "    print(\"   Possible reasons:\")\n",
+        "    print(\"   - The file was edited or modified\")\n",
+        "    print(\"   - Different line endings (CRLF vs LF)\")\n",
+        "    print(\"   - Encoding issues or extra spaces/characters\")\n",
+        "    print(\"   - It's a different version of the file\")\n",
+        "    print(\"\\nRecommendation:\")\n",
+        "    print(\"   Download the latest official raw file from:\")\n",
+        "    print(\"   https://raw.githubusercontent.com/onestardao/WFGY/main/TensionUniverse/WFGY-3.0_Singularity-Demo_AutoBoot_SHA256-Verifiable.txt\")\n",
+        "    print(\"   Then re-run this notebook with the fresh download.\")\n",
+        "\n",
+        "print(\"\\n=== Verification complete ===\")\n",
+        "print(\"If the checksum matches, you are now ready to challenge the\")\n",
+        "print(\"WFGY 3.0 · Singularity Demo and explore the system yourself.\")\n",
+        "print(\"\")\n",
+        "print(\"If you find this project interesting or useful,\")\n",
+        "print(\"consider giving it a ⭐ on GitHub to help more people discover it:\")\n",
+        "print(\"https://github.com/onestardao/WFGY\")\n",
+        "print(\"\")\n",
+        "print(\"Open, verifiable, reproducible. See what happens when more observers join.\")\n"
+      ],
+      "metadata": {
+        "id": "Rk571CHgCEA8"
+      },
+      "execution_count": null,
+      "outputs": []
+    }
+  ]
+}
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