feat(10.2-01): add hidden debug commands and error ring buffer foundation

- Add 4 new keyword routes: /errors, /clear-errors, /debug, /trace
- Create Process Debug Command code node with unified command handling
- Initialize workflow static data structure (errorLog with debug, errors, traces)
- Implement /errors command to display recent errors (default 5, max 50)
- Implement /clear-errors command to reset error buffer
- Implement /debug on|off|status for debug mode toggle
- Implement /trace <correlationId> for correlation-based query
- Add Send Debug Response Telegram node with HTML formatting
- Wire Keyword Router -> Process Debug Command -> Send Debug Response
- Commands remain hidden (not listed in /start menu)
- Node count: 168 -> 170 (+2 nodes)

n8n-workflow.json

@@ -363,6 +363,98 @@
               },
               "renameOutput": true,
               "outputKey": "status"
+            },
+            {
+              "id": "keyword-errors",
+              "conditions": {
+                "options": {
+                  "caseSensitive": false,
+                  "typeValidation": "loose"
+                },
+                "conditions": [
+                  {
+                    "id": "starts-with-errors",
+                    "leftValue": "={{ $json.message.text }}",
+                    "rightValue": "/errors",
+                    "operator": {
+                      "type": "string",
+                      "operation": "startsWith"
+                    }
+                  }
+                ],
+                "combinator": "and"
+              },
+              "renameOutput": true,
+              "outputKey": "errors"
+            },
+            {
+              "id": "keyword-clear-errors",
+              "conditions": {
+                "options": {
+                  "caseSensitive": false,
+                  "typeValidation": "loose"
+                },
+                "conditions": [
+                  {
+                    "id": "starts-with-clear",
+                    "leftValue": "={{ $json.message.text }}",
+                    "rightValue": "/clear",
+                    "operator": {
+                      "type": "string",
+                      "operation": "startsWith"
+                    }
+                  }
+                ],
+                "combinator": "and"
+              },
+              "renameOutput": true,
+              "outputKey": "clear-errors"
+            },
+            {
+              "id": "keyword-debug",
+              "conditions": {
+                "options": {
+                  "caseSensitive": false,
+                  "typeValidation": "loose"
+                },
+                "conditions": [
+                  {
+                    "id": "starts-with-debug",
+                    "leftValue": "={{ $json.message.text }}",
+                    "rightValue": "/debug",
+                    "operator": {
+                      "type": "string",
+                      "operation": "startsWith"
+                    }
+                  }
+                ],
+                "combinator": "and"
+              },
+              "renameOutput": true,
+              "outputKey": "debug"
+            },
+            {
+              "id": "keyword-trace",
+              "conditions": {
+                "options": {
+                  "caseSensitive": false,
+                  "typeValidation": "loose"
+                },
+                "conditions": [
+                  {
+                    "id": "starts-with-trace",
+                    "leftValue": "={{ $json.message.text }}",
+                    "rightValue": "/trace",
+                    "operator": {
+                      "type": "string",
+                      "operation": "startsWith"
+                    }
+                  }
+                ],
+                "combinator": "and"
+              },
+              "renameOutput": true,
+              "outputKey": "trace"
             }
           ]
         },
@@ -1531,7 +1623,7 @@
         "resource": "message",
         "operation": "sendMessage",
         "chatId": "={{ $json.message.chat.id }}",
-        "text": "<b>Commands:</b>\n\n• status\n• start [name]\n• stop [name]\n• restart [name]\n• update [name]\n• logs [name]",
+        "text": "<b>Commands:</b>\n\n\u2022 status\n\u2022 start [name]\n\u2022 stop [name]\n\u2022 restart [name]\n\u2022 update [name]\n\u2022 logs [name]",
         "additionalFields": {
           "parse_mode": "HTML"
         }
@@ -2831,7 +2923,7 @@
     },
     {
       "parameters": {
-        "jsCode": "// Build confirmation message for update all\nconst data = $json;\nconst containers = data.containersToUpdate || [];\nconst count = data.count || 0;\n\n// Build container list (max 10 for display)\nconst displayContainers = containers.slice(0, 10);\nconst containerList = displayContainers.map(c => `• ${c.name}`).join('\\n');\nconst moreText = count > 10 ? `\\n...and ${count - 10} more` : '';\n\nconst message = `Update ${count} container${count !== 1 ? 's' : ''}?\\n\\n${containerList}${moreText}`;\n\n// Create inline keyboard\nconst timestamp = Math.floor(Date.now() / 1000);\nconst containerNames = containers.map(c => c.name).join(',');\n\n// Encode container names in callback (will need to lookup IDs later)\nreturn {\n    json: {\n        chatId: data.chatId,\n        messageId: data.messageId,\n        message: message,\n        keyboard: {\n            inline_keyboard: [\n                [\n                    { text: '✅ Confirm', callback_data: `uall:confirm:${timestamp}` },\n                    { text: '❌ Cancel', callback_data: 'uall:cancel' }\n                ]\n            ]\n        },\n        containerNames: containerNames,\n        containers: containers,\n        timestamp: timestamp\n    }\n};"
+        "jsCode": "// Build confirmation message for update all\nconst data = $json;\nconst containers = data.containersToUpdate || [];\nconst count = data.count || 0;\n\n// Build container list (max 10 for display)\nconst displayContainers = containers.slice(0, 10);\nconst containerList = displayContainers.map(c => `\u2022 ${c.name}`).join('\\n');\nconst moreText = count > 10 ? `\\n...and ${count - 10} more` : '';\n\nconst message = `Update ${count} container${count !== 1 ? 's' : ''}?\\n\\n${containerList}${moreText}`;\n\n// Create inline keyboard\nconst timestamp = Math.floor(Date.now() / 1000);\nconst containerNames = containers.map(c => c.name).join(',');\n\n// Encode container names in callback (will need to lookup IDs later)\nreturn {\n    json: {\n        chatId: data.chatId,\n        messageId: data.messageId,\n        message: message,\n        keyboard: {\n            inline_keyboard: [\n                [\n                    { text: '\u2705 Confirm', callback_data: `uall:confirm:${timestamp}` },\n                    { text: '\u274c Cancel', callback_data: 'uall:cancel' }\n                ]\n            ]\n        },\n        containerNames: containerNames,\n        containers: containers,\n        timestamp: timestamp\n    }\n};"
       },
       "id": "code-build-update-all-confirmation",
       "name": "Build Update All Confirmation",
@@ -2872,7 +2964,7 @@
         "resource": "message",
         "operation": "sendMessage",
         "chatId": "={{ $json.chatId }}",
-        "text": "All containers are up to date! 🎉",
+        "text": "All containers are up to date! \ud83c\udf89",
         "options": {}
       },
       "id": "telegram-send-all-up-to-date",
@@ -2895,7 +2987,7 @@
         "resource": "callback",
         "operation": "answerQuery",
         "queryId": "={{ $json.queryId }}",
-        "text": "⏱️ Confirmation expired (30s timeout)",
+        "text": "\u23f1\ufe0f Confirmation expired (30s timeout)",
         "options": {
           "showAlert": true
         }
@@ -2942,7 +3034,7 @@
         "resource": "callback",
         "operation": "answerQuery",
         "queryId": "={{ $json.queryId }}",
-        "text": "❌ Update cancelled"
+        "text": "\u274c Update cancelled"
       },
       "id": "telegram-answer-update-all-cancel",
       "name": "Answer Update All Cancel",
@@ -3030,7 +3122,7 @@
         "resource": "callback",
         "operation": "answerQuery",
         "queryId": "={{ $json.queryId }}",
-        "text": "✅ Starting batch update..."
+        "text": "\u2705 Starting batch update..."
       },
       "id": "telegram-answer-update-all-confirm",
       "name": "Answer Update All Confirm",
@@ -3498,7 +3590,7 @@
     },
     {
       "parameters": {
-        "jsCode": "// Format logs result for inline keyboard display\nconst result = $json;\nconst data = $('Prepare Inline Logs Input').item.json;\n\nconst containerName = result.containerName;\n\n// Add timestamp to prevent 'message not modified' error on refresh\nconst timestamp = new Date().toLocaleTimeString('en-US', {\n  hour: '2-digit',\n  minute: '2-digit',\n  second: '2-digit',\n  hour12: false\n});\n\n// Build inline keyboard\nconst keyboard = [\n  [\n    { text: '🔄 Refresh Logs', callback_data: `action:logs:${containerName}` },\n    { text: '⬆️ Update', callback_data: `action:update:${containerName}` }\n  ],\n  [\n    { text: '◀️ Back to List', callback_data: 'list:0' }\n  ]\n];\n\n// Append timestamp to message\nconst messageWithTimestamp = result.message + `\\n\\n<i>Updated: ${timestamp}</i>`;\n\nreturn {\n  json: {\n    chatId: data.chatId,\n    messageId: data.messageId,\n    text: messageWithTimestamp,\n    reply_markup: { inline_keyboard: keyboard }\n  }\n};"
+        "jsCode": "// Format logs result for inline keyboard display\nconst result = $json;\nconst data = $('Prepare Inline Logs Input').item.json;\n\nconst containerName = result.containerName;\n\n// Add timestamp to prevent 'message not modified' error on refresh\nconst timestamp = new Date().toLocaleTimeString('en-US', {\n  hour: '2-digit',\n  minute: '2-digit',\n  second: '2-digit',\n  hour12: false\n});\n\n// Build inline keyboard\nconst keyboard = [\n  [\n    { text: '\ud83d\udd04 Refresh Logs', callback_data: `action:logs:${containerName}` },\n    { text: '\u2b06\ufe0f Update', callback_data: `action:update:${containerName}` }\n  ],\n  [\n    { text: '\u25c0\ufe0f Back to List', callback_data: 'list:0' }\n  ]\n];\n\n// Append timestamp to message\nconst messageWithTimestamp = result.message + `\\n\\n<i>Updated: ${timestamp}</i>`;\n\nreturn {\n  json: {\n    chatId: data.chatId,\n    messageId: data.messageId,\n    text: messageWithTimestamp,\n    reply_markup: { inline_keyboard: keyboard }\n  }\n};"
       },
       "id": "b1800598-1ff6-4da3-8506-4e4e8127f902",
       "name": "Format Inline Logs Result",
@@ -4813,6 +4905,42 @@
         2110,
         -300
       ]
+    },
+    {
+      "parameters": {
+        "jsCode": "const staticData = $getWorkflowStaticData('global');\nconst input = $input.item.json;\nconst command = (input.message?.text || '').toLowerCase().trim();\nconst chatId = input.message.chat.id;\n\n// Initialize static data structure if missing\nif (!staticData.errorLog) {\n  staticData.errorLog = {\n    debug: { enabled: false, executionCount: 0 },\n    errors: { buffer: [], nextId: 1, count: 0, lastCleared: new Date().toISOString() },\n    traces: { buffer: [], nextId: 1 }\n  };\n}\n\nlet text = '';\n\n// Parse command and arguments\nconst parts = command.split(' ');\nconst cmd = parts[0];\nconst arg1 = parts[1] || '';\n\nif (cmd === '/errors') {\n  // Show recent errors (default 5, max 50)\n  const count = parseInt(arg1) || 5;\n  const requestedCount = Math.min(count, 50);\n  const errors = staticData.errorLog.errors.buffer || [];\n  const recentErrors = errors.slice(-requestedCount).reverse();\n  \n  if (recentErrors.length === 0) {\n    text = 'No errors recorded.';\n  } else {\n    text = `<b>Recent Errors (${recentErrors.length})</b>\\n\\n`;\n    recentErrors.forEach(err => {\n      const timestamp = new Date(err.timestamp).toISOString().replace('T', ' ').substring(0, 19);\n      text += `<b>#${err.id}</b> - ${timestamp}\\n`;\n      text += `Workflow: ${err.workflow} &gt; ${err.node}\\n`;\n      text += `<pre>${err.userMessage}</pre>\\n`;\n      if (err.error?.httpCode) {\n        text += `HTTP: ${err.error.httpCode}\\n`;\n      }\n      text += '\\n';\n    });\n    \n    text += `<i>Total errors: ${staticData.errorLog.errors.count}\\n`;\n    text += `Debug mode: ${staticData.errorLog.debug.enabled ? 'ON' : 'OFF'}</i>`;\n  }\n  \n} else if (cmd === '/clear' || cmd === '/clear-errors') {\n  // Clear error buffer\n  const count = staticData.errorLog.errors.buffer.length;\n  staticData.errorLog.errors.buffer = [];\n  staticData.errorLog.errors.nextId = 1;\n  staticData.errorLog.errors.lastCleared = new Date().toISOString();\n  text = `<b>Error log cleared.</b> ${count} entries removed.`;\n  \n} else if (cmd === '/debug') {\n  // Toggle debug mode\n  if (arg1 === 'on') {\n    staticData.errorLog.debug.enabled = true;\n    staticData.errorLog.debug.executionCount = 0;\n    text = '<b>Debug mode enabled.</b>\\nTracing sub-workflow boundaries and callback routing.';\n  } else if (arg1 === 'off') {\n    staticData.errorLog.debug.enabled = false;\n    text = '<b>Debug mode disabled.</b>';\n  } else {\n    // Status (default)\n    const debug = staticData.errorLog.debug;\n    const errors = staticData.errorLog.errors;\n    const traces = staticData.errorLog.traces;\n    text = `<b>Debug Status</b>\\n\\n`;\n    text += `Debug mode: ${debug.enabled ? '<b>ON</b>' : 'OFF'}\\n`;\n    text += `Execution count: ${debug.executionCount || 0}\\n`;\n    text += `Error buffer: ${errors.buffer.length} entries\\n`;\n    text += `Trace buffer: ${traces.buffer.length} entries\\n`;\n    text += `Total errors: ${errors.count}`;\n  }\n  \n} else if (cmd === '/trace') {\n  // Trace by correlation ID\n  const correlationId = arg1;\n  \n  if (!correlationId) {\n    text = '<b>Usage:</b> /trace &lt;correlationId&gt;';\n  } else {\n    const errors = staticData.errorLog.errors.buffer || [];\n    const traces = staticData.errorLog.traces.buffer || [];\n    \n    // Find all entries matching correlation ID\n    const errorMatches = errors.filter(e => e.correlationId === correlationId);\n    const traceMatches = traces.filter(t => t.correlationId === correlationId);\n    \n    // Combine and sort chronologically\n    const allMatches = [...errorMatches, ...traceMatches].sort((a, b) => \n      new Date(a.timestamp) - new Date(b.timestamp)\n    );\n    \n    if (allMatches.length === 0) {\n      text = `No entries found for correlation ID: <code>${correlationId}</code>`;\n    } else {\n      text = `<b>Trace for ${correlationId}</b>\\n\\n`;\n      allMatches.forEach(entry => {\n        const timestamp = new Date(entry.timestamp).toISOString().replace('T', ' ').substring(0, 19);\n        const type = entry.id.startsWith('err') ? 'ERROR' : 'TRACE';\n        text += `<b>[${type}]</b> ${timestamp}\\n`;\n        text += `${entry.workflow || 'main'} &gt; ${entry.node}\\n`;\n        \n        if (type === 'ERROR') {\n          text += `<pre>${entry.userMessage}</pre>\\n`;\n        } else if (entry.event) {\n          text += `Event: ${entry.event}\\n`;\n        }\n        text += '\\n';\n      });\n    }\n  }\n}\n\nreturn { json: { chatId, text } };"
+      },
+      "id": "code-process-debug-command",
+      "name": "Process Debug Command",
+      "type": "n8n-nodes-base.code",
+      "typeVersion": 2,
+      "position": [
+        1120,
+        -200
+      ]
+    },
+    {
+      "parameters": {
+        "chatId": "={{ $json.chatId }}",
+        "text": "={{ $json.text }}",
+        "additionalFields": {
+          "parse_mode": "HTML"
+        }
+      },
+      "id": "telegram-send-debug-response",
+      "name": "Send Debug Response",
+      "type": "n8n-nodes-base.telegram",
+      "typeVersion": 1.2,
+      "position": [
+        1340,
+        -200
+      ],
+      "credentials": {
+        "telegramApi": {
+          "id": "I0xTTiASl7C1NZhJ",
+          "name": "Telegram account"
+        }
+      }
     }
   ],
   "connections": {
@@ -5285,6 +5413,34 @@
             "type": "main",
             "index": 0
           }
+        ],
+        [
+          {
+            "node": "Process Debug Command",
+            "type": "main",
+            "index": 0
+          }
+        ],
+        [
+          {
+            "node": "Process Debug Command",
+            "type": "main",
+            "index": 0
+          }
+        ],
+        [
+          {
+            "node": "Process Debug Command",
+            "type": "main",
+            "index": 0
+          }
+        ],
+        [
+          {
+            "node": "Process Debug Command",
+            "type": "main",
+            "index": 0
+          }
         ]
       ]
     },
@@ -6669,6 +6825,17 @@
           }
         ]
       ]
+    },
+    "Process Debug Command": {
+      "main": [
+        [
+          {
+            "node": "Send Debug Response",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
     }
   },
   "pinData": {},
@@ -6679,4 +6846,4 @@
   "tags": [],
   "triggerCount": 1,
   "active": false
-}
+}