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src/Signals/StellaOps.Signals/Models/CallgraphEntrypoint.cs

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+using System.Text.Json.Serialization;
+
+namespace StellaOps.Signals.Models;
+
+/// <summary>
+/// Represents a discovered entrypoint into the call graph.
+/// </summary>
+public sealed class CallgraphEntrypoint
+{
+    /// <summary>
+    /// Reference to the node that is an entrypoint.
+    /// </summary>
+    [JsonPropertyName("nodeId")]
+    public string NodeId { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Type of entrypoint.
+    /// </summary>
+    [JsonPropertyName("kind")]
+    public EntrypointKind Kind { get; set; } = EntrypointKind.Unknown;
+
+    /// <summary>
+    /// HTTP route pattern (for http/grpc kinds).
+    /// Example: "/api/orders/{id}"
+    /// </summary>
+    [JsonPropertyName("route")]
+    public string? Route { get; set; }
+
+    /// <summary>
+    /// HTTP method (GET, POST, etc.) if applicable.
+    /// </summary>
+    [JsonPropertyName("httpMethod")]
+    public string? HttpMethod { get; set; }
+
+    /// <summary>
+    /// Framework that exposes this entrypoint.
+    /// </summary>
+    [JsonPropertyName("framework")]
+    public EntrypointFramework Framework { get; set; } = EntrypointFramework.Unknown;
+
+    /// <summary>
+    /// Discovery source (attribute, convention, config).
+    /// </summary>
+    [JsonPropertyName("source")]
+    public string? Source { get; set; }
+
+    /// <summary>
+    /// Execution phase when this entrypoint is invoked.
+    /// </summary>
+    [JsonPropertyName("phase")]
+    public EntrypointPhase Phase { get; set; } = EntrypointPhase.Runtime;
+
+    /// <summary>
+    /// Deterministic ordering for stable serialization.
+    /// </summary>
+    [JsonPropertyName("order")]
+    public int Order { get; set; }
+}