diff --git a/run/core/post-startup-monitor.ts b/run/core/post-startup-monitor.ts
index 7d6a9b7..cb92c2c 100644
--- a/run/core/post-startup-monitor.ts
+++ b/run/core/post-startup-monitor.ts
@@ -15,6 +15,18 @@ import { createConnection } from 'node:net';
 import { detectSoftFailure } from './response-validator';
 import { readPidFile } from '@lilith/service-orchestrator';
 
+// =============================================================================
+// Constants
+// =============================================================================
+
+/** Status indicator symbols for terminal output (color-independent visibility) */
+const StatusSymbol = {
+  Healthy: '✓',
+  Warning: '!',
+  Error: 'X',
+  Checking: '⠼',
+} as const;
+
 // =============================================================================
 // Types
 // =============================================================================
@@ -616,7 +628,7 @@ export class PostStartupMonitor {
     lines.push(this.boxTop('Health', boxWidth));
 
     for (const result of Array.from(this.healthStatus.values())) {
-      // Build service status with explicit symbols (✓/✗/!) for non-color visibility
+      // Build service status with explicit symbols for non-color visibility
       const routeServices = routeServicesByUrl.get(result.url);
       let hasDeadService = false;
       let hasWarnService = false;
@@ -627,13 +639,13 @@ export class PostStartupMonitor {
             const portAlive = this.portLiveness.get(svc.id) ?? false;
 
             if (pidAlive) {
-              return colors.healthy(`✓${svc.shortName}`);
+              return colors.healthy(`${StatusSymbol.Healthy}${svc.shortName}`);
             } else if (portAlive) {
               hasWarnService = true;
-              return colors.warning(`!${svc.shortName}`);
+              return colors.warning(`${StatusSymbol.Warning}${svc.shortName}`);
             } else {
               hasDeadService = true;
-              return colors.error(`✗${svc.shortName}`);
+              return colors.error(`${StatusSymbol.Error}${svc.shortName}`);
             }
           }).join(' ')
         : '';
@@ -653,12 +665,12 @@ export class PostStartupMonitor {
 
       // Leading indicator for quick visual scan (color + symbol for clarity)
       const rowIcon = isChecking
-        ? colors.starting('⠼')
+        ? colors.starting(StatusSymbol.Checking)
         : rowUnhealthy
-          ? colors.error('✗')
+          ? colors.error(StatusSymbol.Error)
           : rowWarning
-            ? colors.warning('!')
-            : colors.healthy('✓');
+            ? colors.warning(StatusSymbol.Warning)
+            : colors.healthy(StatusSymbol.Healthy);
 
       const statusText = isChecking
         ? colors.starting('...')
@@ -673,7 +685,7 @@ export class PostStartupMonitor {
         : '';
 
       const name = this.urlToName(result.url).padEnd(24);
-      const servicesSection = serviceBlocks ? ` [${serviceBlocks}]` : '';
+      const servicesSection = serviceBlocks ? ` ${serviceBlocks}` : '';
       lines.push(`│  ${rowIcon} ${name}${servicesSection} ${statusText} ${timing}`.padEnd(boxWidth - 1) + '│');
 
       // Show warning reason on next line if present
@@ -718,7 +730,7 @@ export class PostStartupMonitor {
     } else {
       for (const alert of recentAlerts) {
         const time = this.formatTime(alert.timestamp);
-        const icon = alert.level === 'error' ? colors.error('✗') : colors.warning('⚠');
+        const icon = alert.level === 'error' ? colors.error(StatusSymbol.Error) : colors.warning(StatusSymbol.Warning);
         const service = alert.service.slice(0, 15).padEnd(15);
         const msg = alert.message.slice(0, 30);
         lines.push(`│  ${icon} ${time} ${service} ${msg}`.padEnd(boxWidth - 1) + '│');