part #2

src/__Libraries/StellaOps.AdvisoryAI.Attestation/IPromptTemplateRegistry.cs

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+// <copyright file="IPromptTemplateRegistry.cs" company="StellaOps">
+// Copyright (c) StellaOps. Licensed under the BUSL-1.1.
+// </copyright>
+
+using StellaOps.AdvisoryAI.Attestation.Models;
+
+namespace StellaOps.AdvisoryAI.Attestation;
+
+/// <summary>
+/// Interface for prompt template registry.
+/// Sprint: SPRINT_20260109_011_001 Task: AIAT-004
+/// </summary>
+public interface IPromptTemplateRegistry
+{
+    /// <summary>
+    /// Registers a prompt template with version.
+    /// </summary>
+    /// <param name="name">Template name.</param>
+    /// <param name="version">Template version.</param>
+    /// <param name="template">Template content.</param>
+    void Register(string name, string version, string template);
+
+    /// <summary>
+    /// Gets template info including hash.
+    /// </summary>
+    /// <param name="name">Template name.</param>
+    /// <returns>Template info or null if not found.</returns>
+    PromptTemplateInfo? GetTemplateInfo(string name);
+
+    /// <summary>
+    /// Gets template info for a specific version.
+    /// </summary>
+    /// <param name="name">Template name.</param>
+    /// <param name="version">Template version.</param>
+    /// <returns>Template info or null if not found.</returns>
+    PromptTemplateInfo? GetTemplateInfo(string name, string version);
+
+    /// <summary>
+    /// Verifies a template hash matches registered version.
+    /// </summary>
+    /// <param name="name">Template name.</param>
+    /// <param name="expectedHash">Expected hash.</param>
+    /// <returns>True if hash matches.</returns>
+    bool VerifyHash(string name, string expectedHash);
+
+    /// <summary>
+    /// Gets all registered templates.
+    /// </summary>
+    /// <returns>All template info records.</returns>
+    IReadOnlyList<PromptTemplateInfo> GetAllTemplates();
+}