开源MCP工具

Install

npm install -g @kernlang/cli

kern compile src/ --target=nextjs --watch --facades --index   # One command — compile, watch, facades, barrel
kern review src/ --recursive                                  # Static analysis (233 rules, taint tracking)
kern init --template=fullstack my-app                          # Scaffold fullstack app (Next.js + Express + MCP)
kern init --mcp                                               # Scaffold an MCP server with security guards
kern import src/ --outdir=kern/                               # TypeScript → .kern
kern schema --json                                            # Full schema for LLM consumption

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1. Install

npm install -g @kernlang/cli

3. Compile everything

kern compile models.kern # shared types kern compile api.kern --target=express # backend API kern compile frontend.kern --target=nextjs # Next.js frontend kern compile mcp-server.kern --target=mcp # AI agent tools

Build MCP Servers from .kern

30 lines of .kern generates a production MCP server with auto-injected security guards:

kern init --mcp                                   # Scaffold with templates
kern compile server.kern --target=mcp --watch      # Compile + hot reload

Templates: file-tools, api-gateway, database-tools

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KERN Compile + Validate — GitHub Action

Drop this into .github/workflows/kern-compile.yml to validate .kern files compile correctly on every PR:

name: KERN Compile

on:
  push:
    branches: [main, dev]
  pull_request:
    branches: [main]

jobs:
  compile:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-node@v6
        with:
          node-version: '22'

      - name: Activate pnpm
        run: |
          corepack enable
          corepack prepare pnpm@10.32.1 --activate
          pnpm --version

      - run: pnpm install --frozen-lockfile --ignore-scripts
      - run: pnpm build

      - name: Validate .kern files
        run: npx @kernlang/cli compile src/ --target=nextjs --json

      - name: Type-check generated output
        run: npx tsc --noEmit

Quick Example

7 lines of .kern:

machine name=Order initial=pending
  transition from=pending to=confirmed event=confirm
  transition from=confirmed to=shipped event=ship
  transition from=shipped to=delivered event=deliver

Compiles to 140+ lines of typed TypeScript — enums, transition functions, exhaustive checks, error classes.

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5-Minute Quickstart

Build a fullstack Todo app (Next.js + Express + MCP) from scratch:

```bash

VS Code Extensions

• Kern MCP Security — MCP security scanner with inline findings, Security Score, autofixes (Open VSX)
• Kern Sight — Review findings as inline diagnostics, sidebar panel, .kern syntax highlighting

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