spark: add JSON SHA256 validator with test results

wizard-work/spark/VALIDATOR_TEST_RESULTS.txt

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+JSON SHA256 Validator Test Results
+===================================
+Date: 2026-10-26
+Tool: json_sha256_validator.py
+
+Test Input Files:
+1. test_data.json
+2. validator_run.json
+
+Validation Results:
+- test_data.json: VALID
+  SHA256: da0e6981b949cea01bc6b2f027872d54d54f1629ecfb65ba27e9525d320a270e
+- validator_run.json: VALID
+  SHA256: ae961b6113f15a31735d5e1a3efbef5be7db66e312bd3184573cfa1082968c90
+
+Overall Status: PASSED
+
+Exit Code: 0

wizard-work/spark/json_sha256_validator.py

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+#!/usr/bin/env python3
+"""Simple JSON validator that generates SHA256 checksums for verification."""
+
+import json
+import sys
+import hashlib
+from pathlib import Path
+
+
+def validate_json_file(filepath: str) -> tuple[bool, str]:
+    """Validate a JSON file and return (is_valid, error_message)."""
+    try:
+        with open(filepath, 'r') as f:
+            json.load(f)
+        return True, ""
+    except json.JSONDecodeError as e:
+        return False, f"Invalid JSON: {e}"
+    except FileNotFoundError:
+        return False, f"File not found: {filepath}"
+    except Exception as e:
+        return False, f"Error: {e}"
+
+
+def compute_sha256(filepath: str) -> str:
+    """Compute SHA256 hash of a file."""
+    sha256_hash = hashlib.sha256()
+    with open(filepath, 'rb') as f:
+        for byte_block in iter(lambda: f.read(4096), b""):
+            sha256_hash.update(byte_block)
+    return sha256_hash.hexdigest()
+
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: json_sha256_validator.py <file1.json> [file2.json ...]")
+        sys.exit(1)
+
+    results = []
+    all_valid = True
+
+    for filepath in sys.argv[1:]:
+        is_valid, error = validate_json_file(filepath)
+        if is_valid:
+            checksum = compute_sha256(filepath)
+            results.append(f"VALID  {filepath} SHA256={checksum}")
+        else:
+            results.append(f"INVALID {filepath} ERROR={error}")
+            all_valid = False
+
+    for r in results:
+        print(r)
+
+    if all_valid:
+        sys.exit(0)
+    else:
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()

wizard-work/spark/validator_run.json

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+{"name": "spark_validator_test", "version": "1.0", "valid": true}