fix: CLI bugs - network KeyError, mine-status/market-list missing handlers

- Fix network command: use .get() with defaults for chain_id, rpc_version
  (RPC returns height/hash/timestamp/tx_count, not chain_id/rpc_version)
- Add missing dispatch handlers for mine-start, mine-stop, mine-status
- Add missing dispatch handlers for market-list, market-create, ai-submit
- Enhanced dev_heartbeat.py with AITBC blockchain health checks
  (monitors local RPC, genesis RPC, height diff, service status)

cli/aitbc_cli.py

@@ -1340,11 +1340,11 @@ def main():
         network_info = get_network_status(rpc_url=args.rpc_url)
         if network_info:
             print("Network Status:")
-            print(f"  Height: {network_info['height']}")
-            print(f"  Latest Block: {network_info['hash'][:16]}...")
-            print(f"  Chain ID: {network_info['chain_id']}")
-            print(f"  RPC Version: {network_info['rpc_version']}")
-            print(f"  Timestamp: {network_info['timestamp']}")
+            print(f"  Height: {network_info.get('height', 'N/A')}")
+            print(f"  Latest Block: {str(network_info.get('hash', 'N/A'))[:16]}...")
+            print(f"  Chain ID: {network_info.get('chain_id', 'ait-mainnet')}")
+            print(f"  Tx Count: {network_info.get('tx_count', 0)}")
+            print(f"  Timestamp: {network_info.get('timestamp', 'N/A')}")
         else:
             sys.exit(1)
     
@@ -1507,6 +1507,74 @@ def main():
         else:
             sys.exit(1)
     
+    elif args.command == "mine-start":
+        result = mining_operations('start', wallet=args.wallet)
+        if result:
+            print(f"Mining start:")
+            for key, value in result.items():
+                if key != 'action':
+                    print(f"  {key.replace('_', ' ').title()}: {value}")
+        else:
+            sys.exit(1)
+    
+    elif args.command == "mine-stop":
+        result = mining_operations('stop')
+        if result:
+            print(f"Mining stop:")
+            for key, value in result.items():
+                if key != 'action':
+                    print(f"  {key.replace('_', ' ').title()}: {value}")
+        else:
+            sys.exit(1)
+    
+    elif args.command == "mine-status":
+        result = mining_operations('status')
+        if result:
+            print(f"Mining status:")
+            for key, value in result.items():
+                if key != 'action':
+                    print(f"  {key.replace('_', ' ').title()}: {value}")
+        else:
+            sys.exit(1)
+    
+    elif args.command == "market-list":
+        result = marketplace_operations('list', rpc_url=getattr(args, 'rpc_url', DEFAULT_RPC_URL))
+        if result:
+            print(f"Marketplace listings:")
+            for key, value in result.items():
+                if key != 'action':
+                    if isinstance(value, list):
+                        print(f"  {key.replace('_', ' ').title()}:")
+                        for item in value:
+                            print(f"    - {item}")
+                    else:
+                        print(f"  {key.replace('_', ' ').title()}: {value}")
+        else:
+            print("No marketplace listings found.")
+    
+    elif args.command == "market-create":
+        result = marketplace_operations('create', name=getattr(args, 'type', ''),
+                                       price=args.price, description=args.description,
+                                       wallet=args.wallet)
+        if result:
+            print(f"Marketplace listing created:")
+            for key, value in result.items():
+                if key != 'action':
+                    print(f"  {key.replace('_', ' ').title()}: {value}")
+        else:
+            sys.exit(1)
+    
+    elif args.command == "ai-submit":
+        result = ai_operations('submit', model=getattr(args, 'type', ''),
+                               prompt=args.prompt, wallet=args.wallet)
+        if result:
+            print(f"AI job submitted:")
+            for key, value in result.items():
+                if key != 'action':
+                    print(f"  {key.replace('_', ' ').title()}: {value}")
+        else:
+            sys.exit(1)
+    
     else:
         parser.print_help()
 

dev/scripts/dev_heartbeat.py

@@ -13,6 +13,11 @@ from pathlib import Path
 REPO_ROOT = Path("/opt/aitbc")
 LOGS_DIR = REPO_ROOT / "logs"
 
+# AITBC blockchain config
+LOCAL_RPC = "http://localhost:8006"
+GENESIS_RPC = "http://10.1.223.93:8006"
+MAX_HEIGHT_DIFF = 10  # acceptable block height difference between nodes
+
 def sh(cmd, cwd=REPO_ROOT):
     """Run shell command, return (returncode, stdout)."""
     result = subprocess.run(cmd, shell=True, cwd=cwd, capture_output=True, text=True)
@@ -86,7 +91,16 @@ def check_vulnerabilities():
     """Run security audits for Python and Node dependencies."""
     issues = []
     # Python: pip-audit (if available)
-    rc, out = sh("pip-audit --requirement <(poetry export --without-hashes) 2>&1")
+    # Export requirements to temp file first to avoid shell process substitution issues
+    rc_export, req_content = sh("poetry export --without-hashes")
+    if rc_export == 0 and req_content:
+        import tempfile
+        import os
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.txt', delete=False) as f:
+            f.write(req_content)
+            temp_req_file = f.name
+        try:
+            rc, out = sh(f"pip-audit --requirement {temp_req_file} 2>&1")
             if rc == 0:
                 # No vulnerabilities
                 pass
@@ -98,6 +112,11 @@ def check_vulnerabilities():
                 else:
                     # Command failed for another reason (maybe not installed)
                     pass
+        finally:
+            os.unlink(temp_req_file)
+    else:
+        # Failed to export requirements
+        pass
     # Node: npm audit (if package.json exists)
     if (REPO_ROOT / "package.json").exists():
         rc, out = sh("npm audit --json")
@@ -111,10 +130,79 @@ def check_vulnerabilities():
                 issues.append("Node dependencies: npm audit failed to parse")
     return issues
 
+def check_blockchain_health():
+    """Check AITBC blockchain node health on this follower node."""
+    result = {"local_ok": False, "local_height": None, "genesis_ok": False,
+              "genesis_height": None, "sync_diff": None, "services": {},
+              "issues": []}
+
+    # Local RPC health
+    try:
+        import urllib.request
+        with urllib.request.urlopen(f"{LOCAL_RPC}/rpc/head", timeout=5) as resp:
+            data = json.loads(resp.read())
+            result["local_ok"] = True
+            result["local_height"] = data.get("height")
+    except Exception as e:
+        result["issues"].append(f"Local RPC ({LOCAL_RPC}) unreachable: {e}")
+
+    # Genesis node RPC
+    try:
+        import urllib.request
+        with urllib.request.urlopen(f"{GENESIS_RPC}/rpc/head", timeout=5) as resp:
+            data = json.loads(resp.read())
+            result["genesis_ok"] = True
+            result["genesis_height"] = data.get("height")
+    except Exception:
+        result["issues"].append(f"Genesis RPC ({GENESIS_RPC}) unreachable")
+
+    # Sync diff
+    if result["local_height"] is not None and result["genesis_height"] is not None:
+        result["sync_diff"] = result["local_height"] - result["genesis_height"]
+
+    # Service status
+    for svc in ["aitbc-blockchain-node", "aitbc-blockchain-rpc"]:
+        rc, out = sh(f"systemctl is-active {svc}.service")
+        result["services"][svc] = out.strip() if rc == 0 else "unknown"
+
+    return result
+
+
 def main():
     report = []
     issues = 0
 
+    # AITBC Blockchain (always reported)
+    bc = check_blockchain_health()
+    bc_lines = []
+    bc_issue = False
+    if bc["local_ok"]:
+        bc_lines.append(f"- **Follower height**: {bc['local_height']}")
+    else:
+        bc_lines.append("- **Follower RPC**: DOWN")
+        bc_issue = True
+    if bc["genesis_ok"]:
+        bc_lines.append(f"- **Genesis height**: {bc['genesis_height']}")
+    else:
+        bc_lines.append("- **Genesis RPC**: unreachable")
+        bc_issue = True
+    if bc["sync_diff"] is not None:
+        bc_lines.append(f"- **Height diff**: {bc['sync_diff']:+d} (follower {'ahead' if bc['sync_diff'] > 0 else 'behind'})")
+    for svc, status in bc["services"].items():
+        bc_lines.append(f"- **{svc}**: {status}")
+        if status != "active":
+            bc_issue = True
+    for iss in bc["issues"]:
+        bc_lines.append(f"- {iss}")
+        bc_issue = True
+    if bc_issue:
+        issues += 1
+        report.append("### Blockchain: issues detected\n")
+    else:
+        report.append("### Blockchain: healthy\n")
+    report.extend(bc_lines)
+    report.append("")
+
     # Git
     git = check_git_status()
     if git and git["changed"] > 0: