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src/Scanner/__Libraries/StellaOps.Scanner.Analyzers.Lang/Core/LanguageExplicitKey.cs

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+using System.Security.Cryptography;
+using System.Text;
+
+namespace StellaOps.Scanner.Analyzers.Lang;
+
+public static class LanguageExplicitKey
+{
+    public static string Create(string analyzerId, string ecosystem, string name, string spec, string originLocator)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(analyzerId);
+        ArgumentException.ThrowIfNullOrWhiteSpace(ecosystem);
+        ArgumentException.ThrowIfNullOrWhiteSpace(name);
+
+        analyzerId = analyzerId.Trim();
+        ecosystem = ecosystem.Trim();
+        name = name.Trim();
+        spec = spec?.Trim() ?? string.Empty;
+        originLocator = originLocator?.Trim() ?? string.Empty;
+
+        var canonical = string.Join('\n', ecosystem, name, spec, originLocator);
+        var digest = SHA256.HashData(Encoding.UTF8.GetBytes(canonical));
+        var hex = Convert.ToHexString(digest).ToLowerInvariant();
+
+        return $"explicit::{analyzerId}::{ecosystem}::{name}::sha256:{hex}";
+    }
+}