diff --git a/TODO.md b/TODO.md
index cb2744f..080c1d9 100644
--- a/TODO.md
+++ b/TODO.md
@@ -34,3 +34,6 @@ avoid inserting `br`, look into noStrudel's eol metadata
 
 ## TODO: window crashes on unsupported kind event
 ## TODO: app-wide error boundary. splash crash screen.
+## TODO: collapsible relay list -> user relaylink without inbox/outbox icon
+
+## TODO: use NIP badges everywhere for linking NIPs
diff --git a/src/components/KindsViewer.tsx b/src/components/KindsViewer.tsx
new file mode 100644
index 0000000..4d24dc6
--- /dev/null
+++ b/src/components/KindsViewer.tsx
@@ -0,0 +1,97 @@
+import { getKindInfo } from "@/constants/kinds";
+import Command from "./Command";
+
+// Supported kinds with rich renderers
+const SUPPORTED_KINDS = [
+  0, // Profile Metadata
+  1, // Short Text Note
+  3, // Contact List
+  6, // Repost
+  7, // Reaction
+  20, // Picture (NIP-68)
+  21, // Video Event (NIP-71)
+  22, // Short Video (NIP-71)
+  1063, // File Metadata (NIP-94)
+  1111, // Post
+  9735, // Zap Receipt
+  9802, // Highlight
+  10002, // Relay List Metadata (NIP-65)
+  30023, // Long-form Article
+];
+
+/**
+ * KindsViewer - System introspection command
+ * Shows all event kinds with rich rendering support
+ */
+export default function KindsViewer() {
+  // Sort kinds in ascending order
+  const sortedKinds = [...SUPPORTED_KINDS].sort((a, b) => a - b);
+
+  return (
+    <div className="h-full w-full overflow-y-auto p-6">
+      <div className="max-w-3xl mx-auto space-y-6">
+        {/* Header */}
+        <div>
+          <h1 className="text-2xl font-bold mb-2">
+            Supported Event Kinds ({sortedKinds.length})
+          </h1>
+          <p className="text-sm text-muted-foreground">
+            Event kinds with rich rendering support in Grimoire. Default kinds
+            display raw content only.
+          </p>
+        </div>
+
+        {/* Kind List */}
+        <div className="border border-border divide-y divide-border">
+          {sortedKinds.map((kind) => {
+            const kindInfo = getKindInfo(kind);
+            const Icon = kindInfo?.icon;
+
+            return (
+              <div
+                key={kind}
+                className="p-4 hover:bg-muted/30 transition-colors"
+              >
+                <div className="flex items-start gap-4">
+                  {/* Icon */}
+                  <div className="w-10 h-10 bg-accent/20 rounded flex items-center justify-center flex-shrink-0">
+                    {Icon ? (
+                      <Icon className="w-5 h-5 text-accent" />
+                    ) : (
+                      <span className="text-xs font-mono text-muted-foreground">
+                        {kind}
+                      </span>
+                    )}
+                  </div>
+
+                  {/* Content */}
+                  <div className="flex-1 min-w-0">
+                    <div className="flex items-baseline gap-2 mb-1">
+                      <code className="text-sm font-mono font-semibold">
+                        {kind}
+                      </code>
+                      <span className="text-sm font-semibold">
+                        {kindInfo?.name || `Kind ${kind}`}
+                      </span>
+                    </div>
+                    <p className="text-sm text-muted-foreground mb-2">
+                      {kindInfo?.description || "No description available"}
+                    </p>
+                    {kindInfo?.nip && (
+                      <Command
+                        name={`NIP-${kindInfo.nip}`}
+                        description={`View specification`}
+                        appId="nip"
+                        props={{ number: kindInfo.nip }}
+                      />
+                    )}
+                  </div>
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/WindowRenderer.tsx b/src/components/WindowRenderer.tsx
index d1494c4..28ccccb 100644
--- a/src/components/WindowRenderer.tsx
+++ b/src/components/WindowRenderer.tsx
@@ -11,6 +11,7 @@ import EncodeViewer from "./EncodeViewer";
 import DecodeViewer from "./DecodeViewer";
 import { RelayViewer } from "./RelayViewer";
 import KindRenderer from "./KindRenderer";
+import KindsViewer from "./KindsViewer";
 import Feed from "./nostr/Feed";
 import { WinViewer } from "./WinViewer";
 import { DebugViewer } from "./DebugViewer";
@@ -101,6 +102,9 @@ export function WindowRenderer({ window, onClose }: WindowRendererProps) {
       case "kind":
         content = <KindRenderer kind={parseInt(window.props.number)} />;
         break;
+      case "kinds":
+        content = <KindsViewer />;
+        break;
       case "man":
         content = <ManPage cmd={window.props.cmd} />;
         break;
diff --git a/src/types/app.ts b/src/types/app.ts
index 69ad082..f19e803 100644
--- a/src/types/app.ts
+++ b/src/types/app.ts
@@ -3,6 +3,7 @@ import { MosaicNode } from "react-mosaic-component";
 export type AppId =
   | "nip"
   | "kind"
+  | "kinds"
   | "man"
   | "feed"
   | "win"
diff --git a/src/types/man.ts b/src/types/man.ts
index eae477f..904c92a 100644
--- a/src/types/man.ts
+++ b/src/types/man.ts
@@ -87,6 +87,18 @@ export const manPages: Record<string, ManPageEntry> = {
     category: "System",
     defaultProps: { cmd: "help" },
   },
+  kinds: {
+    name: "kinds",
+    section: "1",
+    synopsis: "kinds",
+    description:
+      "Display all Nostr event kinds with rich rendering support in Grimoire. Shows kind numbers, names, descriptions, and links to their defining NIPs.",
+    examples: ["kinds    View all supported event kinds"],
+    seeAlso: ["kind", "nip", "man"],
+    appId: "kinds",
+    category: "System",
+    defaultProps: {},
+  },
   // debug: {
   //   name: "debug",
   //   section: "1",