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diff --git a/tests/nip01_compliance.rs b/tests/nip01_compliance.rs
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+++ b/tests/nip01_compliance.rs
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+//! NIP-01 Compliance Integration Tests
+//!
+//! These tests verify that ngit-grasp relay implements NIP-01 correctly
+//! by using the grasp-audit library to run compliance tests.
+//!
+//! # Test Strategy
+//!
+//! - Uses grasp-audit as a library (not CLI)
+//! - Automatically manages relay lifecycle
+//! - Reuses test specs from grasp-audit (single source of truth)
+//! - Pure Rust, no shell scripts
+//!
+//! # Running Tests
+//!
+//! ```bash
+//! # Run all NIP-01 compliance tests
+//! cargo test --test nip01_compliance
+//!
+//! # Run specific test
+//! cargo test --test nip01_compliance test_nip01_smoke
+//!
+//! # With output
+//! cargo test --test nip01_compliance -- --nocapture
+//! ```
+
+mod common;
+
+use common::TestRelay;
+use grasp_audit::*;
+
+/// Test NIP-01 smoke tests against ngit-grasp relay
+///
+/// This test:
+/// 1. Starts a fresh ngit-grasp relay instance
+/// 2. Runs all NIP-01 smoke tests from grasp-audit
+/// 3. Verifies all tests pass
+/// 4. Shuts down the relay
+#[tokio::test]
+async fn test_nip01_smoke() {
+    // Start test relay
+    let relay = TestRelay::start().await;
+    
+    // Create audit client in CI mode (isolated, no cleanup needed)
+    let config = AuditConfig::ci();
+    let client = AuditClient::new(relay.url(), config)
+        .await
+        .expect("Failed to create audit client");
+    
+    // Run all NIP-01 smoke tests
+    let results = specs::Nip01SmokeTests::run_all(&client).await;
+    
+    // Print detailed report
+    results.print_report();
+    
+    // Stop relay
+    relay.stop().await;
+    
+    // Assert all tests passed
+    assert!(
+        results.all_passed(),
+        "NIP-01 smoke tests failed: {}/{} passed",
+        results.passed_count(),
+        results.total_count()
+    );
+}
+
+/// Test individual NIP-01 tests can be run separately
+///
+/// This demonstrates that we can run individual tests from the specs
+/// for more granular testing or debugging.
+#[tokio::test]
+async fn test_nip01_individual_tests() {
+    use grasp_audit::specs::nip01_smoke::Nip01SmokeTests;
+    
+    let relay = TestRelay::start().await;
+    let config = AuditConfig::ci();
+    let client = AuditClient::new(relay.url(), config)
+        .await
+        .expect("Failed to create audit client");
+    
+    // We can't call private methods, so we'll run the full suite
+    // This test is mainly to show the pattern
+    let all_results = Nip01SmokeTests::run_all(&client).await;
+    
+    relay.stop().await;
+    
+    // Verify
+    assert!(all_results.all_passed());
+}
+
+/// Test that relay rejects invalid events
+///
+/// This is a critical security test - we want to ensure the relay
+/// properly validates events before accepting them.
+#[tokio::test]
+async fn test_relay_validates_events() {
+    let relay = TestRelay::start().await;
+    let config = AuditConfig::ci();
+    let client = AuditClient::new(relay.url(), config)
+        .await
+        .expect("Failed to create audit client");
+    
+    // The validation tests are part of the smoke tests
+    let results = specs::Nip01SmokeTests::run_all(&client).await;
+    
+    // Check that validation tests exist and pass
+    let validation_tests: Vec<_> = results
+        .results
+        .iter()
+        .filter(|t| t.spec_ref.contains("validation"))
+        .collect();
+    
+    relay.stop().await;
+    
+    // Should have validation tests
+    assert!(
+        !validation_tests.is_empty(),
+        "No validation tests found in NIP-01 smoke tests"
+    );
+    
+    // All validation tests should pass
+    for test in validation_tests {
+        assert!(
+            test.passed,
+            "Validation test failed: {} - {}",
+            test.name,
+            test.error.as_deref().unwrap_or("unknown error")
+        );
+    }
+}
+
+/// Test relay lifecycle management
+///
+/// Ensures our test fixture properly manages relay lifecycle
+#[tokio::test]
+async fn test_relay_lifecycle() {
+    // Start relay
+    let relay = TestRelay::start().await;
+    let url = relay.url().to_string();
+    
+    // Verify we can connect
+    let config = AuditConfig::ci();
+    let client = AuditClient::new(&url, config)
+        .await
+        .expect("Failed to connect to relay");
+    
+    assert!(client.is_connected().await, "Client should be connected");
+    
+    // Stop relay
+    relay.stop().await;
+    
+    // Note: We can't easily verify disconnection without modifying grasp-audit
+    // to expose connection state after relay shutdown. That's okay - the
+    // important part is that the relay starts and stops cleanly.
+}
+
+/// Test multiple relays can run in parallel
+///
+/// This ensures our random port selection works correctly
+#[tokio::test]
+async fn test_parallel_relays() {
+    // Start two relays simultaneously
+    let relay1 = TestRelay::start().await;
+    let relay2 = TestRelay::start().await;
+    
+    // Should have different URLs (different ports)
+    assert_ne!(
+        relay1.url(),
+        relay2.url(),
+        "Relays should use different ports"
+    );
+    
+    // Both should be connectable
+    let config = AuditConfig::ci();
+    
+    let client1 = AuditClient::new(relay1.url(), config.clone())
+        .await
+        .expect("Failed to connect to relay 1");
+    
+    let client2 = AuditClient::new(relay2.url(), config)
+        .await
+        .expect("Failed to connect to relay 2");
+    
+    assert!(client1.is_connected().await);
+    assert!(client2.is_connected().await);
+    
+    // Clean up
+    relay1.stop().await;
+    relay2.stop().await;
+}