diff --git a/aicp/__main__.py b/aicp/__main__.py
index adab9d3..1019b9a 100644
--- a/aicp/__main__.py
+++ b/aicp/__main__.py
@@ -148,6 +148,11 @@ def main(argv=None):
                 json.dump(result, handle, indent=2)
                 handle.write("\n")
             print(f"Verification {'passed' if result['passed'] else 'failed'}: {args.output}")
+            summary = result["summary"]
+            print(f"Checks: {summary['passed']}/{summary['total']} passed, {summary['timed_out']} timed out, {summary['launch_errors']} launch errors")
+            for index, check in enumerate(result["checks"], 1):
+                if not check["passed"]:
+                    print(f"  Check {index}: {check['status']} (exit={check['exit_code']})")
             return 0 if result["passed"] else 1
         elif args.command == "task":
             validate_config(args.path)
diff --git a/aicp/verification.py b/aicp/verification.py
index 15420e4..e2aef96 100644
--- a/aicp/verification.py
+++ b/aicp/verification.py
@@ -45,7 +45,18 @@ def run_checks(project, checks, timeout=120):
             "stderr_bytes": len(stderr),
             "passed": status == "completed" and exit_code == 0,
         })
-    return {"schema_version": 1, "passed": all(item["passed"] for item in results), "checks": results}
+    return {
+        "schema_version": 1,
+        "passed": all(item["passed"] for item in results),
+        "summary": {
+            "total": len(results),
+            "passed": sum(item["passed"] for item in results),
+            "failed": sum(not item["passed"] for item in results),
+            "timed_out": sum(item["status"] == "timeout" for item in results),
+            "launch_errors": sum(item["status"] == "launch_error" for item in results),
+        },
+        "checks": results,
+    }
 
 
 def verify(project, config_path, timeout=120):
diff --git a/docs/VERIFICATION.md b/docs/VERIFICATION.md
index 9699afc..e662b79 100644
--- a/docs/VERIFICATION.md
+++ b/docs/VERIFICATION.md
@@ -20,3 +20,7 @@ python3 -m aicp verify --path /path/to/project --checks /path/to/project/checks.
 ```
 
 Commands execute sequentially as argv arrays without shell interpolation. Every command is attempted, including after a failure; the overall result passes only if all checks exit zero. Timeouts and launch errors fail closed. The report includes exit codes, elapsed time, and output digests, **not raw output**. Review commands before running them: they have the same host privileges as the invoking user and may change files or access secrets. Subprocess timeout is not a process-tree containment mechanism. Avoid passing secrets as command arguments because argv is recorded in the report. The CLI does not automatically discover or invent test commands.
+
+## Diagnostic summaries
+
+Verification evidence includes a `summary` object with total, passed, failed, timed-out, and launch-error counts. The CLI prints the counts and failing check indices/statuses without printing captured stdout or stderr. The JSON still records command arguments and hashes, which may reveal sensitive values: only use reviewed commands without secrets in arguments, and keep reports private when appropriate. Timeouts bound the direct subprocess call but are **not a guarantee that all descendant processes are terminated**. This is trusted host execution, not isolation.
diff --git a/tests/test_verification_diagnostics.py b/tests/test_verification_diagnostics.py
new file mode 100644
index 0000000..3d9ad95
--- /dev/null
+++ b/tests/test_verification_diagnostics.py
@@ -0,0 +1,35 @@
+"""Verification summaries do not expose captured command output."""
+import sys
+import tempfile
+from pathlib import Path
+import unittest
+
+from aicp.verification import run_checks
+
+
+class VerificationDiagnosticsTests(unittest.TestCase):
+    def test_pass_fail_and_timeout_summary(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            project = Path(tmp)
+            checks = [
+                [sys.executable, "-c", "print('ok')"],
+                [sys.executable, "-c", "raise SystemExit(2)"],
+                [sys.executable, "-c", "import time; time.sleep(3)"],
+            ]
+            result = run_checks(project, checks, timeout=1)
+            self.assertFalse(result["passed"])
+            self.assertEqual(result["summary"], {
+                "total": 3, "passed": 1, "failed": 2,
+                "timed_out": 1, "launch_errors": 0,
+            })
+            self.assertNotIn("stdout", result["checks"][0])
+            self.assertIn("stdout_sha256", result["checks"][0])
+
+    def test_launch_error_summary(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            result = run_checks(Path(tmp), [["/nonexistent-aicp-executable"]])
+            self.assertEqual(result["summary"]["launch_errors"], 1)
+
+
+if __name__ == "__main__":
+    unittest.main()