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Jonathan Hefner 4ff22d0097 Fix build errors in examples (#180 ) * Update `package.json` * Add TypeScript type checking to example build scripts Add `tsc --noEmit &&` before `vite build` in all example `package.json` files to catch type errors during builds. Previously, type errors in `server.ts` files were not detected because Vite/Bun transpile without type checking. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Make `_meta` optional in `McpUiAppResourceConfig` The `_meta` and `ui` properties were required, causing TypeScript errors when calling `registerAppResource()` without providing metadata. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Fix Zod type compatibility in `registerAppTool()` Use `ZodRawShapeCompat \| AnySchema` from SDK's `zod-compat` module instead of raw `ZodRawShape` to resolve type errors when examples pass `ZodObject` schemas to `registerAppTool()`. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Remove unused imports in example apps - `basic-server-react`: Remove unused `McpUiResourceTeardownResult` - `customer-segmentation-server`: Remove unused `PostMessageTransport` 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> * Fix CI git install test for fork PRs Use `github.event.pull_request.head.repo.full_name` to correctly reference the fork repository when testing git installs from PRs. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>		2025-12-18 11:17:23 +00:00
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src	docs: add tool visibility and restructure _meta.ui (#131 )	2025-12-16 21:47:40 +00:00
mcp-app.html	Add color-scheme meta tag to all example apps	2025-12-15 11:42:18 -08:00
package.json	Fix build errors in examples (#180 )	2025-12-18 11:17:23 +00:00
README.md	docs: add tool visibility and restructure _meta.ui (#131 )	2025-12-16 21:47:40 +00:00
server.ts	fix(examples): use server.registerTool for non-UI tool + fix missing imports (#173 )	2025-12-17 00:17:45 +00:00
tsconfig.json	Add system-monitor-server example	2025-12-04 14:32:41 -06:00
vite.config.ts	Add system-monitor-server example	2025-12-04 14:32:41 -06:00

README.md

Example: System Monitor App

A demo MCP App that displays real-time OS metrics with a stacked area chart for per-core CPU usage and a bar gauge for memory.

Features

Per-Core CPU Monitoring: Stacked area chart showing individual CPU core utilization over a 1-minute sliding window
Memory Usage: Horizontal bar gauge with color-coded thresholds (green/yellow/red)
System Info: Hostname, platform, and uptime display
Auto-Polling: Automatically starts monitoring on load with 2-second refresh interval
Theme Support: Adapts to light/dark mode preferences

Running

Install dependencies:
```
npm install
```

Build and start the server:

npm run start:http  # for Streamable HTTP transport
# OR
npm run start:stdio  # for stdio transport

View using the basic-host example or another MCP Apps-compatible host.

Architecture

Server (`server.ts`)

Exposes a single get-system-stats tool that returns:

Raw per-core CPU timing data (idle/total counters)
Memory usage (used/total/percentage)
System info (hostname, platform, uptime)

The tool is linked to a UI resource via _meta.ui.resourceUri.

App (`src/mcp-app.ts`)

Uses Chart.js for the stacked area chart visualization
Polls the server tool every 2 seconds
Computes CPU usage percentages client-side from timing deltas
Maintains a 30-point history (1 minute at 2s intervals)
Updates all UI elements on each poll