Console Disconnect Bug Analysis

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{
  "id": "9d0fefd0-a92a-4392-8bb2-732f308df367",
  "type": "general",
  "status": "completed",
  "title": "Console Disconnect Bug Analysis",
  "description": "Analysis of the disconnect after timing bar issue",
  "context": {
    "output": "<div style=\"background:#1e1e1e;color:#e0e0e0;padding:20px;border-radius:8px;font-family:sans-serif;\">\n<h2 style=\"color:#fff;margin:0 0 16px 0;\">🔍 Console Disconnect Bug Analysis</h2>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"color:#f87171;margin:0 0 12px 0;\">Problem</h3>\n<p style=\"color:#e0e0e0;margin:0;\">After a turn completes successfully (timing bar appears showing ~81.7s), the status bar shows \"RECONNECTING...\" and stays stuck. The server needs to be restarted to recover.</p>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"color:#e5c07b;margin:0 0 12px 0;\">Your Observation</h3>\n<p style=\"color:#e0e0e0;margin:0;\">This <strong>only happens when the timing bar appears</strong> - i.e., on turns that run long enough to generate timing data. Short turns don't exhibit this.</p>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"color:#98c379;margin:0 0 12px 0;\">Root Cause Hypothesis</h3>\n<p style=\"color:#e0e0e0;margin:0 0 12px 0;\">There's a <strong>race condition</strong> in the stream completion flow:</p>\n<ol style=\"margin:0;padding-left:20px;color:#9ca3af;line-height:1.8;\">\n<li>POST stream receives <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">kontext</code> event → timing bar displayed</li>\n<li>POST stream receives <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">done</code> event</li>\n<li>Stream ends → <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">reader.read()</code> returns <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">done: true</code></li>\n<li>Code calls <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">checkForNewKontask()</code> → succeeds</li>\n<li>Dispatches <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">stream_end { hadOutput: true }</code> → should go to idle</li>\n<li>❌ <strong>BUT</strong>: The stream closing also triggers an error/disconnect event (browser behavior)</li>\n<li>Error handler calls <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">reconnectWithEventSource()</code> → stuck reconnecting</li>\n</ol>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"color:#61afef;margin:0 0 12px 0;\">Why Only Long Turns?</h3>\n<p style=\"color:#e0e0e0;margin:0;\">Short turns finish so quickly that all events (including <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">kontext</code> and <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">done</code>) arrive in the same chunk. The stream closes cleanly before any async race can occur. Long turns allow time for async operations to overlap.</p>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"color:#c678dd;margin:0 0 12px 0;\">Proposed Fix</h3>\n<p style=\"color:#e0e0e0;margin:0 0 12px 0;\">In <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">console-streaming.ts</code>, the catch block should check if the stream already completed successfully:</p>\n<pre style=\"background:#1a1a1a;padding:12px;border-radius:4px;overflow-x:auto;color:#98c379;font-size:0.85em;margin:8px 0;\"><code>} catch (e) {\n  // Only reconnect if stream didn't complete normally\n  if (!streamComplete) {\n    reconnectWithEventSource(requestId, token);\n  }\n}</code></pre>\n<p style=\"color:#9ca3af;margin:12px 0 0 0;\">The <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">streamComplete</code> flag is already set to <code style=\"background:#3d3d3d;padding:2px 6px;border-radius:3px;\">true</code> at line 279, but the catch block at line 307 doesn't check it.</p>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;\">\n<h4 style=\"color:#fff;margin:0 0 8px 0;\">Key Code Locations</h4>\n<table style=\"width:100%;border-collapse:collapse;font-size:0.9em;\">\n<tr><td style=\"color:#7f848e;padding:4px 12px 4px 0;\">Stream handler</td><td style=\"color:#61afef;\">konui/src/console-streaming.ts:267-317</td></tr>\n<tr><td style=\"color:#7f848e;padding:4px 12px 4px 0;\">reconnectWithEventSource</td><td style=\"color:#61afef;\">konui/src/console-streaming.ts:329-437</td></tr>\n<tr><td style=\"color:#7f848e;padding:4px 12px 4px 0;\">State transition</td><td style=\"color:#61afef;\">konui/src/console-sm-transitions.ts:144-164</td></tr>\n</table>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-top:16px;\">\n<h4 style=\"color:#fff;margin:0 0 8px 0;\">What's Next?</h4>\n<p style=\"color:#9ca3af;margin:0;\">Choose an action:</p>\n</div>\n</div>",
    "requestedAt": "2026-01-06T01:15:00.000Z",
    "requestId": "47d47151-9806-42de-a08d-bcf155bd913b",
    "choices": [
      {
        "label": "Fix it now",
        "value": "Apply the fix to console-streaming.ts to prevent reconnect after successful stream completion",
        "primary": true
      },
      {
        "label": "Add logging first",
        "value": "Add more logging to capture the exact sequence of events before fixing"
      },
      {
        "label": "Later",
        "value": "Add this to the backlog for later"
      }
    ],
    "turnTiming": {
      "totalMs": 125407,
      "ttfeMs": 91,
      "thinkingMs": 125316,
      "toolExecutionMs": 0,
      "toolCallCount": 0,
      "thinkingPct": 100,
      "toolsPct": 0,
      "ttfePct": 0
    }
  },
  "createdBy": "claude",
  "createdAt": "2026-01-05T16:42:35.787Z",
  "updatedAt": "2026-01-05T16:42:40.875Z",
  "requestId": "47d47151-9806-42de-a08d-bcf155bd913b",
  "scope": "vibetools",
  "tags": [
    "konsole",
    "console",
    "bug",
    "streaming"
  ],
  "targetUser": "claude"
}