checkpoint: Claude Code integration + implement missing MCP var tools

Add Claude Code conductor commands, MCP server, MMA exec scripts,
and implement py_get_var_declaration / py_set_var_declaration which
were registered in dispatch and tool specs but had no function bodies.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

BUILD.md

@@ -0,0 +1,103 @@
+# BUILD.md
+
+## Prerequisites
+- [Runtime requirements]
+- [Development tools needed]
+- [Environment setup]
+
+## Build Commands
+
+### Development
+```bash
+# Start development server
+npm run dev
+
+# Run in watch mode
+npm run watch
+```
+
+### Production
+```bash
+# Build for production
+npm run build
+
+# Start production server
+npm start
+```
+
+### Testing
+```bash
+# Run all tests
+npm test
+
+# Run tests in watch mode
+npm run test:watch
+
+# Run specific test file
+npm test -- filename
+```
+
+### Linting & Formatting
+```bash
+# Lint code
+npm run lint
+
+# Fix linting issues
+npm run lint:fix
+
+# Format code
+npm run format
+```
+
+## CI/CD Pipeline
+
+### GitHub Actions
+```yaml
+# .github/workflows/main.yml
+name: CI/CD
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+      - run: npm ci
+      - run: npm test
+      - run: npm run build
+```
+
+## Deployment
+
+### Staging
+1. [Deployment steps]
+2. [Verification steps]
+
+### Production
+1. [Pre-deployment checklist]
+2. [Deployment steps]
+3. [Post-deployment verification]
+
+## Rollback Procedures
+1. [Emergency rollback steps]
+2. [Database rollback if needed]
+3. [Verification steps]
+
+## Troubleshooting
+
+### Common Issues
+**Issue**: [Problem description]
+**Solution**: [How to fix]
+
+### Build Failures
+- [Common build errors and solutions]
+
+## Keywords <!-- #keywords -->
+- build
+- deployment
+- ci/cd
+- testing
+- production