diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
new file mode 100644
index 00000000..a6809e21
--- /dev/null
+++ b/.claude-plugin/marketplace.json
@@ -0,0 +1,13 @@
+{
+  "name": "plannotator-marketplace",
+  "owner": {
+    "name": "backnotprop"
+  },
+  "plugins": [
+    {
+      "name": "plannotator",
+      "source": "./apps/hook",
+      "description": "Interactive Plan Review: Mark up and refine your plans using native Claude Code hooks, then easily share for team collaboration."
+    }
+  ]
+}
diff --git a/apps/hook/.claude-plugin/plugin.json b/apps/hook/.claude-plugin/plugin.json
new file mode 100644
index 00000000..0acf4cfe
--- /dev/null
+++ b/apps/hook/.claude-plugin/plugin.json
@@ -0,0 +1,10 @@
+{
+  "name": "plannotator",
+  "description": "Interactive Plan Review: Mark up and refine your plans using native Claude Code hooks, then easily share for team collaboration.",
+  "version": "1.0.0",
+  "author": {
+    "name": "backnotprop"
+  },
+  "repository": "https://github.com/backnotprop/plannotator",
+  "keywords": ["planning", "review", "hooks", "ExitPlanMode", "collaboration"]
+}
diff --git a/apps/hook/hooks/hooks.json b/apps/hook/hooks/hooks.json
new file mode 100644
index 00000000..5ce061a0
--- /dev/null
+++ b/apps/hook/hooks/hooks.json
@@ -0,0 +1,16 @@
+{
+  "hooks": {
+    "PermissionRequest": [
+      {
+        "matcher": "ExitPlanMode",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bun run ${CLAUDE_PLUGIN_ROOT}/server/index.ts",
+            "timeout": 600
+          }
+        ]
+      }
+    ]
+  }
+}
diff --git a/apps/hooks/index.html b/apps/hook/index.html
similarity index 100%
rename from apps/hooks/index.html
rename to apps/hook/index.html
diff --git a/apps/hooks/index.tsx b/apps/hook/index.tsx
similarity index 100%
rename from apps/hooks/index.tsx
rename to apps/hook/index.tsx
diff --git a/apps/hooks/package.json b/apps/hook/package.json
similarity index 100%
rename from apps/hooks/package.json
rename to apps/hook/package.json
diff --git a/apps/hooks/server/index.ts b/apps/hook/server/index.ts
similarity index 90%
rename from apps/hooks/server/index.ts
rename to apps/hook/server/index.ts
index a33da314..e6fb8939 100644
--- a/apps/hooks/server/index.ts
+++ b/apps/hook/server/index.ts
@@ -4,16 +4,26 @@
  * Spawned by ExitPlanMode hook to serve Plannotator UI and handle approve/deny decisions.
  * Uses random port to support multiple concurrent Claude Code sessions.
  *
- * Usage: bun run server/index.ts "<plan markdown content>"
+ * Reads hook event from stdin, extracts plan content, serves UI, returns decision.
  */
 
 import { $ } from "bun";
 import { join, dirname } from "path";
 
-const planContent = process.argv[2] || Bun.env.PLAN_CONTENT || "";
+// Read hook event from stdin
+const eventJson = await Bun.stdin.text();
+
+let planContent = "";
+try {
+  const event = JSON.parse(eventJson);
+  planContent = event.tool_input?.plan || "";
+} catch {
+  console.error("Failed to parse hook event from stdin");
+  process.exit(1);
+}
 
 if (!planContent) {
-  console.error("No plan content provided. Usage: bun run server/index.ts \"<plan>\"");
+  console.error("No plan content in hook event");
   process.exit(1);
 }
 
@@ -63,7 +73,6 @@ const server = Bun.serve({
 
     const file = Bun.file(join(distDir, filePath));
     if (await file.exists()) {
-      // Set appropriate content types
       const contentType = getContentType(filePath);
       return new Response(file, {
         headers: contentType ? { "Content-Type": contentType } : {}
diff --git a/apps/hooks/tsconfig.json b/apps/hook/tsconfig.json
similarity index 100%
rename from apps/hooks/tsconfig.json
rename to apps/hook/tsconfig.json
diff --git a/apps/hooks/vite.config.ts b/apps/hook/vite.config.ts
similarity index 100%
rename from apps/hooks/vite.config.ts
rename to apps/hook/vite.config.ts
diff --git a/apps/hooks/shell/exit-plan-mode.sh b/apps/hooks/shell/exit-plan-mode.sh
deleted file mode 100755
index d21993b7..00000000
--- a/apps/hooks/shell/exit-plan-mode.sh
+++ /dev/null
@@ -1,39 +0,0 @@
-#!/bin/bash
-#
-# ExitPlanMode Hook - Launches Plannotator for plan approval/denial
-#
-# This hook intercepts ExitPlanMode, spawns a Bun server with the plan content,
-# and blocks until the user approves or denies (with feedback).
-#
-# Exit codes:
-#   0 = User approved → ExitPlanMode proceeds
-#   2 = User denied → feedback sent to Claude via stderr
-#
-
-# Get the directory where this hook lives
-HOOK_DIR="$(cd "$(dirname "$0")" && pwd)"
-PLANNING_HOOK_DIR="$(dirname "$HOOK_DIR")"
-SERVER_SCRIPT="$PLANNING_HOOK_DIR/server/index.ts"
-
-# Read the event from stdin
-EVENT=$(cat)
-
-# Check if this is ExitPlanMode
-TOOL_NAME=$(echo "$EVENT" | jq -r '.tool_name // empty')
-
-if [ "$TOOL_NAME" = "ExitPlanMode" ]; then
-  # Extract plan content
-  PLAN=$(echo "$EVENT" | jq -r '.tool_input.plan // empty')
-
-  if [ -n "$PLAN" ] && [ "$PLAN" != "null" ]; then
-    # Launch Bun server with plan content
-    # Server blocks until user makes a decision (approve/deny)
-    # Server exits 0 for approve, 2 for deny (with feedback to stderr)
-    cd "$PLANNING_HOOK_DIR"
-    bun run "$SERVER_SCRIPT" "$PLAN"
-    exit $?
-  fi
-fi
-
-# If not ExitPlanMode or no plan, allow through
-exit 0
diff --git a/package.json b/package.json
index 94334df1..a920a4dc 100644
--- a/package.json
+++ b/package.json
@@ -3,10 +3,10 @@
   "private": true,
   "workspaces": ["apps/*", "packages/*"],
   "scripts": {
-    "dev:hooks": "bun run --cwd apps/hooks dev",
+    "dev:hook": "bun run --cwd apps/hook dev",
     "dev:portal": "bun run --cwd apps/portal dev",
     "dev:marketing": "bun run --cwd apps/marketing dev",
-    "build:hooks": "bun run --cwd apps/hooks build",
+    "build:hook": "bun run --cwd apps/hook build",
     "build:portal": "bun run --cwd apps/portal build",
     "build:marketing": "bun run --cwd apps/marketing build"
   }