Add sandbox infrastructure for isolated diagnostics and simulations

.env.example

@@ -22,3 +22,9 @@ VECTOR_DB_ENABLED=false
 # VECTOR_DB_TYPE=pinecone|weaviate|chroma
 # VECTOR_DB_API_KEY=your-api-key
 # VECTOR_DB_ENDPOINT=https://your-instance.vectordb.com
+
+# Sandbox Configuration (Optional)
+# Set SANDBOX_ENABLED=true to enable sandbox features for diagnostics and simulations
+SANDBOX_ENABLED=false
+# SANDBOX_DEFAULT_TIMEOUT=30000  # Timeout in milliseconds (default: 30000)
+# SANDBOX_LOG_LEVEL=info  # Log level for sandbox execution (debug|info|warn|error)

README.md

@@ -12,6 +12,7 @@ This project includes comprehensive quality and hardening features:
 
 - **Config Validation**: Type-safe configuration with Zod validation
 - **Telemetry**: Optional OpenTelemetry integration (no vendor lock-in)
+- **Sandboxes**: Isolated execution environments for diagnostics and simulations
 - **Security Scanning**: Trivy vulnerability scanning and SBOM generation
 - **Pre-commit Hooks**: Automatic linting and formatting
 - **Dependency Management**: Renovate for automated updates
@@ -59,6 +60,7 @@ The project uses Zod for runtime configuration validation. Configuration is load
 - `TELEMETRY_*`: Optional telemetry settings
 - `AI_*`: Optional AI/ML settings
 - `VECTOR_DB_*`: Optional vector database settings
+- `SANDBOX_*`: Optional sandbox settings
 
 **Example:**
 
@@ -120,6 +122,142 @@ const span = tracer.startSpan('my-operation');
 span.end();
 ```
 
+## Sandboxes
+
+### Overview
+
+Sandboxes provide isolated execution environments for running diagnostics and simulations. This feature is useful for transparency testing, scenario validation, and safe execution of potentially long-running or resource-intensive operations.
+
+**Enable Sandboxes:**
+
+```bash
+# Set in .env file
+SANDBOX_ENABLED=true
+SANDBOX_DEFAULT_TIMEOUT=30000  # Optional - timeout in milliseconds
+SANDBOX_LOG_LEVEL=info         # Optional - debug|info|warn|error
+```
+
+### Features
+
+- **Isolated Execution**: Run code in isolated sandbox environments
+- **Timeout Control**: Automatic timeout handling for long-running operations
+- **Error Handling**: Comprehensive error capture and reporting
+- **Logging**: Built-in logging with configurable levels
+- **Diagnostics**: Run transparency validation tests
+- **Simulations**: Execute scenario-based testing
+
+### Basic Usage
+
+```typescript
+import { runInSandbox } from './sandbox';
+
+// Simple sandbox execution
+const result = await runInSandbox('my-sandbox', async () => {
+  // Your code here
+  return { status: 'success' };
+});
+
+if (result.success) {
+  console.log('Result:', result.data);
+  console.log('Duration:', result.duration, 'ms');
+} else {
+  console.error('Error:', result.error);
+}
+```
+
+### Diagnostic Tests
+
+Run diagnostic tests for transparency validation:
+
+```typescript
+import { runDiagnostics } from './sandbox/diagnostics';
+
+const results = await runDiagnostics([
+  {
+    name: 'config-validation',
+    description: 'Validate configuration',
+    run: async () => {
+      // Your validation logic
+      return true; // pass or false to fail
+    },
+  },
+  {
+    name: 'connectivity-check',
+    description: 'Check connectivity',
+    run: async () => {
+      // Check external services
+      return true;
+    },
+  },
+]);
+
+// Results contain: name, status, message, duration, metadata
+results.forEach((r) => {
+  console.log(`${r.name}: ${r.status} (${r.duration}ms)`);
+});
+```
+
+### Simulations
+
+Run scenario-based simulations:
+
+```typescript
+import { runSimulations } from './sandbox/simulation';
+
+const results = await runSimulations([
+  {
+    name: 'high-load-scenario',
+    description: 'Test under high load',
+    input: { events: 1000 },
+    run: async (input) => {
+      // Process events
+      return { processed: input.events };
+    },
+    validate: (output) => {
+      // Optional validation
+      return output.processed === 1000;
+    },
+  },
+]);
+
+// Results contain: scenarioName, success, output, duration, validated
+results.forEach((r) => {
+  console.log(`${r.scenarioName}: ${r.success ? 'PASS' : 'FAIL'}`);
+});
+```
+
+### Advanced Usage
+
+For more control, use the Sandbox class directly:
+
+```typescript
+import { Sandbox } from './sandbox';
+
+const sandbox = new Sandbox({
+  name: 'custom-sandbox',
+  timeout: 60000, // 60 seconds
+  logLevel: 'debug',
+  isolated: true,
+});
+
+const result = await sandbox.execute(async () => {
+  // Your code here
+  return { result: 'data' };
+});
+
+// Access sandbox logs
+const logs = sandbox.getLogs();
+```
+
+### Examples
+
+See `src/sandbox/examples.ts` for complete working examples including:
+
+- Basic sandbox execution
+- Transparency diagnostics
+- Load testing simulations
+- Error handling scenarios
+
 ## Development
 
 ### Building
@@ -256,7 +394,15 @@ Check Issues tab for the Renovate Dependency Dashboard
 │   │   └── validator.ts # Smoke test script
 │   ├── telemetry/       # OpenTelemetry integration
 │   │   └── index.ts     # Tracer and logger setup
+│   ├── sandbox/         # Sandbox execution environments
+│   │   ├── index.ts     # Core sandbox functionality
+│   │   ├── diagnostics.ts # Diagnostic test runner
+│   │   ├── simulation.ts  # Simulation scenario runner
+│   │   └── examples.ts    # Usage examples
 │   └── index.ts         # Main entry point
+├── test/                # Test files
+│   ├── basic.test.js    # Basic tests
+│   └── sandbox.test.js  # Sandbox tests
 ├── .github/
 │   └── workflows/       # GitHub Actions workflows
 ├── .husky/              # Git hooks

src/config/index.ts

@@ -38,6 +38,15 @@ export const ConfigSchema = z.object({
       endpoint: z.string().url().optional(),
     })
     .optional(),
+
+  // Sandbox settings (optional)
+  sandbox: z
+    .object({
+      enabled: z.coerce.boolean().default(false),
+      defaultTimeout: z.coerce.number().int().positive().default(30000),
+      logLevel: z.enum(['debug', 'info', 'warn', 'error']).default('info'),
+    })
+    .optional(),
 });
 
 export type Config = z.infer<typeof ConfigSchema>;
@@ -70,6 +79,11 @@ export function loadConfig(): Config {
       apiKey: process.env.VECTOR_DB_API_KEY,
       endpoint: process.env.VECTOR_DB_ENDPOINT,
     },
+    sandbox: {
+      enabled: process.env.SANDBOX_ENABLED,
+      defaultTimeout: process.env.SANDBOX_DEFAULT_TIMEOUT,
+      logLevel: process.env.SANDBOX_LOG_LEVEL,
+    },
   };
 
   // Parse and validate configuration

src/sandbox/diagnostics.ts

@@ -0,0 +1,146 @@
+/**
+ * Diagnostic runner for transparency testing
+ */
+
+import { Sandbox, SandboxResult } from './index';
+import { createLogger } from '../telemetry';
+
+const logger = createLogger('diagnostics');
+
+/**
+ * Diagnostic test result
+ */
+export interface DiagnosticResult {
+  name: string;
+  status: 'pass' | 'fail' | 'skip';
+  message: string;
+  duration: number;
+  metadata?: Record<string, unknown>;
+}
+
+/**
+ * Diagnostic test definition
+ */
+export interface DiagnosticTest {
+  name: string;
+  description: string;
+  run: () => Promise<boolean> | boolean;
+  skip?: boolean;
+}
+
+/**
+ * Diagnostic runner for executing transparency tests
+ */
+export class DiagnosticRunner {
+  private tests: DiagnosticTest[] = [];
+  private sandbox: Sandbox;
+
+  constructor(name: string = 'diagnostic-runner') {
+    this.sandbox = new Sandbox({
+      name,
+      timeout: 60000, // 60s for diagnostics
+      logLevel: 'info',
+    });
+  }
+
+  /**
+   * Register a diagnostic test
+   */
+  registerTest(test: DiagnosticTest): void {
+    this.tests.push(test);
+    logger.debug(`Registered diagnostic test: ${test.name}`);
+  }
+
+  /**
+   * Run all registered diagnostic tests
+   */
+  async runAll(): Promise<DiagnosticResult[]> {
+    logger.info(`Running ${this.tests.length} diagnostic tests`);
+    const results: DiagnosticResult[] = [];
+
+    for (const test of this.tests) {
+      if (test.skip) {
+        results.push({
+          name: test.name,
+          status: 'skip',
+          message: 'Test skipped',
+          duration: 0,
+        });
+        continue;
+      }
+
+      const result = await this.runTest(test);
+      results.push(result);
+    }
+
+    const passed = results.filter((r) => r.status === 'pass').length;
+    const failed = results.filter((r) => r.status === 'fail').length;
+    const skipped = results.filter((r) => r.status === 'skip').length;
+
+    logger.info('Diagnostic tests completed', {
+      total: results.length,
+      passed,
+      failed,
+      skipped,
+    });
+
+    return results;
+  }
+
+  /**
+   * Run a single diagnostic test
+   */
+  private async runTest(test: DiagnosticTest): Promise<DiagnosticResult> {
+    const startTime = Date.now();
+
+    try {
+      const result: SandboxResult<boolean> = await this.sandbox.execute(async () => {
+        return await test.run();
+      });
+
+      const duration = Date.now() - startTime;
+
+      if (!result.success) {
+        return {
+          name: test.name,
+          status: 'fail',
+          message: result.error?.message || 'Test execution failed',
+          duration,
+          metadata: { error: result.error },
+        };
+      }
+
+      return {
+        name: test.name,
+        status: result.data === true ? 'pass' : 'fail',
+        message: result.data === true ? 'Test passed' : 'Test failed',
+        duration,
+      };
+    } catch (error) {
+      const duration = Date.now() - startTime;
+      return {
+        name: test.name,
+        status: 'fail',
+        message: error instanceof Error ? error.message : 'Unknown error',
+        duration,
+        metadata: { error },
+      };
+    }
+  }
+
+  /**
+   * Get number of registered tests
+   */
+  getTestCount(): number {
+    return this.tests.length;
+  }
+}
+
+/**
+ * Helper function to create and run diagnostics
+ */
+export async function runDiagnostics(tests: DiagnosticTest[]): Promise<DiagnosticResult[]> {
+  const runner = new DiagnosticRunner();
+  tests.forEach((test) => runner.registerTest(test));
+  return runner.runAll();
+}