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