feat: integrate performance upgrade and agent inspection tooling

Assets/ShrinkInspection/Runtime/ShrinkInspection.Runtime.asmdef

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+{
+  "name": "ShrinkInspection.Runtime",
+  "references": ["ShrinkContext.Core.Runtime", "ShrinkEventBus.Runtime", "ShrinkNetwork.Runtime", "ShrinkCommand.Runtime", "Newtonsoft.Json"],
+  "autoReferenced": true,
+  "noEngineReferences": true
+}

Assets/ShrinkInspection/Runtime/ShrinkInspection.Runtime.asmdef.meta

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Assets/ShrinkInspection/Runtime/ShrinkInspectionSnapshot.cs

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+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using Newtonsoft.Json;
+using ShrinkContext;
+using ShrinkEventBus;
+using ShrinkNetwork;
+using ShrinkCommand;
+
+namespace ShrinkSDK.Inspection
+{
+    public sealed class ShrinkInspectionRelation
+    {
+        public string From = "";
+        public string To = "";
+        public string Kind = "";
+        public string Scope = "";
+    }
+
+    /// <summary>Explicit, on-demand snapshot. Call from the owning host thread while registration/composition is stable.</summary>
+    public sealed class ShrinkInspectionSnapshot
+    {
+        public int FormatVersion = 1;
+        public string BuildId = "";
+        public string CapturedAtUtc = DateTime.UtcNow.ToString("O");
+        public readonly List<string> Coverage = new();
+        public readonly List<ShrinkInspectionRelation> Relations = new();
+        public readonly Dictionary<string, object> State = new();
+
+        public static string BuildIdentity(IEnumerable<string> assemblyNames)
+        {
+            var loaded = AppDomain.CurrentDomain.GetAssemblies().Where(a => !a.IsDynamic).ToArray();
+            var identity = string.Join(";", assemblyNames.Distinct().OrderBy(n => n, StringComparer.Ordinal).Select(name =>
+            {
+                var candidates = loaded.Where(a => a.GetName().Name == name).ToArray();
+                if (candidates.Length != 1) throw new InvalidOperationException("Cannot establish unique runtime assembly identity: " + name);
+                return name + ":" + candidates[0].ManifestModule.ModuleVersionId.ToString("N");
+            }));
+            using var sha = System.Security.Cryptography.SHA256.Create();
+            return BitConverter.ToString(sha.ComputeHash(System.Text.Encoding.UTF8.GetBytes(identity))).Replace("-", "").ToLowerInvariant();
+        }
+
+        public ShrinkInspectionSnapshot(string buildId) { BuildId = buildId; }
+        public string ToJson() => JsonConvert.SerializeObject(this, Formatting.Indented, new Newtonsoft.Json.Converters.StringEnumConverter());
+
+        public void AddContext(string scope, ShrinkContextRuntime runtime, ShrinkContextLoader? loader = null)
+        {
+            var snapshot = runtime.CaptureDiagnostic();
+            State.Add(scope, new { snapshot.BindingCount, snapshot.Notifications,
+                Fibers = snapshot.Fibers.Select(f => new { f.Uid, f.Name, f.Status, f.Retired, f.InTransition, f.Inject, f.Provide, f.Dependencies, f.ErrorType }).ToArray(),
+                Transaction = loader?.LastTransaction is { } t ? new { t.Generation, t.Phase, t.CurrentEntryId, t.ErrorType, t.RestoreAttempted, t.PreviousCompositionRestored, t.RestoreErrorType } : null });
+            foreach (var fiber in snapshot.Fibers.Where(f => !f.Retired))
+                foreach (var dependency in fiber.Dependencies)
+                {
+                    Add("fiber:" + scope + ":" + fiber.Uid, "key:" + dependency.Key, "requires@" + dependency.Realm, scope);
+                    if (dependency.CurrentProviderUid.HasValue)
+                        Add("fiber:" + scope + ":" + dependency.CurrentProviderUid, "fiber:" + scope + ":" + fiber.Uid, "provider:" + dependency.Key + "@" + dependency.Realm, scope);
+                }
+        }
+
+        public void AddNetwork(string scope, ShrinkNetworkService service)
+        {
+            State.Add(scope, new { Metrics = service.GetDiagnosticsSnapshot(), Queue = service.DispatchScheduler is ShrinkNetworkDispatchQueue queued ? queued.CaptureDiagnostics() : (service.DispatchScheduler as ShrinkNetworkInlineDispatchScheduler)?.CaptureDiagnostics() });
+            foreach (var meta in service.MessageRegistry.Registrations)
+            {
+                Add("opcode:" + meta.Opcode, "type:" + TypeName(meta.MessageType), "message", scope);
+                if (!string.IsNullOrEmpty(meta.Route)) Add("route:" + meta.Route, "type:" + TypeName(meta.MessageType), "message", scope);
+            }
+            foreach (var pair in service.Router.CaptureBindings()) Add("type:" + TypeName(pair.Key), MethodId(pair.Value), "handler", scope);
+        }
+
+        public void AddEventBus(string scope, IShrinkEventBus bus)
+        {
+            try
+            {
+                var bindings = EventBus.CaptureBindings(bus);
+                State.Add(scope, new { Bus = bus.Key.ToString(), Subscribers = bindings.Count });
+                foreach (var binding in bindings) Add("type:" + TypeName(binding.EventType), MethodId(binding.Handler), "subscribes", scope);
+            }
+            catch (NotSupportedException) { Coverage.Add(scope + ": custom EventBus does not expose bindings."); }
+        }
+
+        public void AddCommands(string scope, ShrinkCommandService service)
+        {
+            State.Add(scope, new { Registrations = service.Commands.Select(c => new { c.Path, c.Aliases, c.Permission, c.SourceKind }).ToArray() });
+            foreach (var binding in service.CaptureBindings()) Add("command:" + binding.Path, MethodId(binding.Handler), "command", scope);
+        }
+
+        private void Add(string from, string to, string kind, string scope) => Relations.Add(new ShrinkInspectionRelation { From = from, To = to, Kind = kind, Scope = scope });
+        private static string TypeName(Type type) => (type.FullName ?? type.Name).Replace('+', '.');
+        public static string MethodId(MethodInfo method)
+        {
+            // Generated wrappers and generic signatures remain runtime-only endpoints rather than guessed source matches.
+            if (method.IsGenericMethod || method.DeclaringType?.IsGenericType == true || method.GetParameters().Any(p => p.ParameterType.IsGenericType || p.ParameterType.IsArray || p.ParameterType.IsByRef))
+                return "runtime-method:" + method.Module.ModuleVersionId.ToString("N") + ":" + method.MetadataToken;
+            var parameters = method.GetParameters();
+            return "M:" + TypeName(method.DeclaringType!) + "." + method.Name + (parameters.Length == 0 ? "" : "(" + string.Join(",", parameters.Select(p => TypeName(p.ParameterType))) + ")");
+        }
+    }
+}

Assets/ShrinkInspection/Runtime/ShrinkInspectionSnapshot.cs.meta

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