fix: improve context debug command with error handling and performance

src/commands/compact-commands.ts

@@ -30,47 +30,56 @@ export const compactCommand: Command = {
 
     // /compact debug - Show detailed context debugging info
     if (subcommand === 'debug') {
-      const info = context.agent.getContextInfo();
-      const messages = context.agent.getMessages();
+      try {
+        const info = context.agent.getContextInfo();
+        const messages = context.agent.getMessages();
 
-      // Build detailed debug output
-      const debugInfo = {
-        context: {
-          tokens: info.tokens,
-          messageTokens: info.messageTokens,
-          systemPromptTokens: info.systemPromptTokens,
-          toolDefinitionTokens: info.toolDefinitionTokens,
-          messages: info.messages,
-          userMessages: info.userMessages,
-          assistantMessages: info.assistantMessages,
-          toolResultMessages: info.toolResultMessages,
-        },
-        limits: {
-          maxTokens: info.maxTokens,
-          contextWindow: info.contextWindow,
-          effectiveLimit: info.effectiveLimit,
-          outputReserve: info.outputReserve,
-          safetyBuffer: info.safetyBuffer,
-          tierName: info.tierName,
-        },
-        state: {
-          hasSummary: info.hasSummary,
-          compressionEnabled: info.compressionEnabled,
-          compressionStats: info.compression,
-          workingSetFiles: info.workingSetFiles,
-        },
-        messages: messages.map((msg, index) => ({
-          index,
-          role: msg.role,
-          contentPreview: typeof msg.content === 'string' 
-            ? msg.content.slice(0, 200) + (msg.content.length > 200 ? '...' : '')
-            : `[complex content: ${msg.content.length} blocks]`,
-          contentLength: typeof msg.content === 'string' ? msg.content.length : msg.content.reduce((acc, block) => acc + (typeof block.text === 'string' ? block.text.length : 0), 0),
-        })),
-        conversationSummary: info.hasSummary ? '[summary exists - use /compact status for token info]' : null,
-      };
+        // Validate we have a messages array
+        if (!messages || !Array.isArray(messages)) {
+          return 'CONTEXT_DEBUG_ERROR:Invalid messages data';
+        }
 
-      return `CONTEXT_DEBUG:${JSON.stringify(debugInfo, null, 2)}`;
+        // Build detailed debug output
+        const debugInfo = {
+          context: {
+            tokens: info.tokens,
+            messageTokens: info.messageTokens,
+            systemPromptTokens: info.systemPromptTokens,
+            toolDefinitionTokens: info.toolDefinitionTokens,
+            messages: info.messages,
+            userMessages: info.userMessages,
+            assistantMessages: info.assistantMessages,
+            toolResultMessages: info.toolResultMessages,
+          },
+          limits: {
+            maxTokens: info.maxTokens,
+            contextWindow: info.contextWindow,
+            effectiveLimit: info.effectiveLimit,
+            outputReserve: info.outputReserve,
+            safetyBuffer: info.safetyBuffer,
+            tierName: info.tierName,
+          },
+          state: {
+            hasSummary: info.hasSummary,
+            compressionEnabled: info.compressionEnabled,
+            compressionStats: info.compression,
+            workingSetFiles: info.workingSetFiles,
+          },
+          messagePreviews: messages.map((msg, index) => ({
+            index,
+            role: msg.role,
+            contentPreview: typeof msg.content === 'string' 
+              ? msg.content.slice(0, 200) + (msg.content.length > 200 ? '...' : '')
+              : `[complex content: ${msg.content.length} blocks]`,
+            contentLength: typeof msg.content === 'string' ? msg.content.length : (msg.content?.length || 0),
+          })),
+          conversationSummary: info.hasSummary ? '[summary exists - use /compact status for token info]' : null,
+        };
+
+        return `CONTEXT_DEBUG:${JSON.stringify(debugInfo, null, 2)}`;
+      } catch (error) {
+        return `CONTEXT_DEBUG_ERROR:${error instanceof Error ? error.message : 'Unknown error occurred'}`;
+      }
     }
 
     // /compact memory - Show memory usage
@@ -191,10 +200,10 @@ export const compactCommand: Command = {
       return `COMPRESS_STATS:${JSON.stringify(output)}`;
     }
 
-    return `COMPACT_ERROR:Unknown subcommand "${subcommand}". Use: status, summarize, compress, debug`;
+    return `COMPACT_ERROR:Unknown subcommand "${subcommand}". Use: status, summarize, compress, memory, debug`;
   },
 };
 
 export function registerCompactCommands(): void {
   registerCommand(compactCommand);
-}
+}