feat(plugin): add marketplace manifest so the plugin is installable

.claude-plugin/marketplace.json

@@ -0,0 +1,15 @@
+{
+  "name": "nativeapptemplate",
+  "owner": {
+    "name": "NativeAppTemplate",
+    "url": "https://github.com/nativeapptemplate"
+  },
+  "description": "NativeAppTemplate Agent — generate validated three-platform SaaS apps (Rails 8.1 API + SwiftUI iOS + Jetpack Compose Android) from a natural-language spec.",
+  "plugins": [
+    {
+      "name": "nativeapptemplate-agent",
+      "source": "./plugin",
+      "description": "Generate, validate, and walk three-platform apps from inside Claude Code — generate-app + walk-app skills, bundling the generator MCP server + mobile-mcp."
+    }
+  ]
+}

README.md

@@ -126,7 +126,14 @@ tree ./out/clinic-queue/
 # └── validation-report.html   ← self-contained visual report (open in a browser)
 ```
 
-The same generator also ships as an MCP server — `npx -y -p nativeapptemplate-agent nativeapptemplate-agent-mcp` exposes a `generate_app` tool, so any MCP-capable assistant (Claude Code, Cursor, Cline, Goose) can invoke it without leaving the editor. And a **Claude Code plugin** ships in [`plugin/`](./plugin/) — `claude --plugin-dir ./plugin` loads two skills: `/nativeapptemplate-agent:generate-app` (generate → validate → explain) and `/nativeapptemplate-agent:walk-app` (launch the app on a simulator/emulator and walk its UI via `mobile-mcp`, screenshots inline). See [`plugin/README.md`](./plugin/README.md).
+The same generator also ships as an MCP server — `npx -y -p nativeapptemplate-agent nativeapptemplate-agent-mcp` exposes a `generate_app` tool, so any MCP-capable assistant (Claude Code, Cursor, Cline, Goose) can invoke it without leaving the editor. And a **Claude Code plugin** ships in [`plugin/`](./plugin/) with two skills: `/nativeapptemplate-agent:generate-app` (generate → validate → explain) and `/nativeapptemplate-agent:walk-app` (launch the app on a simulator/emulator and walk its UI via `mobile-mcp`, screenshots inline). Install it via the bundled marketplace:
+
+```bash
+/plugin marketplace add nativeapptemplate/nativeapptemplate-agent
+/plugin install nativeapptemplate-agent@nativeapptemplate
+```
+
+…or load it locally with `claude --plugin-dir ./plugin`. See [`plugin/README.md`](./plugin/README.md).
 
 ## Requirements
 

plugin/.claude-plugin/plugin.json

@@ -2,7 +2,7 @@
   "name": "nativeapptemplate-agent",
   "version": "0.2.0",
   "description": "Generate a validated three-platform SaaS app (Rails 8.1 API + SwiftUI iOS + Jetpack Compose Android) from a one-sentence spec, explain the validation report, and walk the running app on a simulator/emulator via mobile-mcp — without leaving Claude Code.",
-  "author": { "name": "Daisuke" },
+  "author": { "name": "Daisuke Adachi" },
   "homepage": "https://github.com/nativeapptemplate/nativeapptemplate-agent",
   "repository": "https://github.com/nativeapptemplate/nativeapptemplate-agent",
   "license": "MIT"

plugin/README.md

@@ -72,11 +72,18 @@ Then in the session:
 After editing plugin files, run `/reload-plugins` to pick up changes. Confirm the
 skill is loaded via `/help` and the MCP server via `/mcp`.
 
-## Install from git
+## Install from the marketplace
+
+The repo ships a marketplace manifest (`.claude-plugin/marketplace.json`) that points at
+this `plugin/` directory. Add the marketplace, then install:
 
 ```
-/plugin install github.com/nativeapptemplate/nativeapptemplate-agent
+/plugin marketplace add nativeapptemplate/nativeapptemplate-agent
+/plugin install nativeapptemplate-agent@nativeapptemplate
 ```
 
-> Note: the plugin lives in the `plugin/` subdirectory of the repo. If installing
-> by path, point at `plugin/`, not the repo root.
+`nativeapptemplate` is the marketplace name; `nativeapptemplate-agent` is the plugin. Once
+installed, the skills are available as `/nativeapptemplate-agent:generate-app` and
+`/nativeapptemplate-agent:walk-app` (and `/mcp` shows both bundled servers). The CLI forms
+are `claude plugin marketplace add nativeapptemplate/nativeapptemplate-agent` and
+`claude plugin install nativeapptemplate-agent@nativeapptemplate`.