Hot Full Session Architecture

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{
  "id": "59007a67-b484-48b5-96c0-8a2486e3335f",
  "type": "general",
  "status": "completed",
  "title": "Hot Full Session Architecture",
  "description": "What it would take to implement persistent Claude sessions with full tool access",
  "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;\">🔥 Hot Full Session: What It Would Take</h2>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"margin:0 0 12px 0;color:#61afef;\">The Challenge</h3>\n<p style=\"color:#e0e0e0;line-height:1.6;margin:0;\">Claude Code CLI wasn't designed to stay running between prompts. Each invocation is a fresh process. To make it \"hot\", we'd need to keep the process alive and send new prompts to it.</p>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"margin:0 0 12px 0;color:#98c379;\">Option 1: Session Resume (Easiest)</h3>\n<p style=\"color:#e0e0e0;margin:0 0 12px 0;\">Claude Code has <code style=\"background:#1e1e1e;padding:2px 6px;border-radius:3px;\">--resume</code> flag that restores previous session state.</p>\n<pre style=\"background:#1e1e1e;padding:12px;border-radius:4px;overflow-x:auto;color:#e0e0e0;line-height:1.6;margin:0;\">\n<span style=\"color:#7f848e;\"># First turn</span>\nclaude --session-id abc123 \"do something\"\n\n<span style=\"color:#7f848e;\"># Later turn - resumes context</span>\nclaude --resume abc123 \"continue\"\n</pre>\n<table style=\"width:100%;margin-top:12px;border-collapse:collapse;\">\n<tr><td style=\"padding:4px 8px;color:#98c379;\">✓</td><td style=\"color:#e0e0e0;\">Already supported by Claude CLI</td></tr>\n<tr><td style=\"padding:4px 8px;color:#98c379;\">✓</td><td style=\"color:#e0e0e0;\">Full tool access preserved</td></tr>\n<tr><td style=\"padding:4px 8px;color:#e06c75;\">✗</td><td style=\"color:#e0e0e0;\">Still cold starts (~2-3s) - just remembers context</td></tr>\n</table>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"margin:0 0 12px 0;color:#e5c07b;\">Option 2: Persistent Process (Hard)</h3>\n<p style=\"color:#e0e0e0;margin:0 0 12px 0;\">Keep Claude process running, pipe new prompts to it.</p>\n<pre style=\"background:#1e1e1e;padding:12px;border-radius:4px;overflow-x:auto;color:#e0e0e0;line-height:1.6;margin:0;\">\n<span style=\"color:#7f848e;\"># Hypothetical - not how Claude CLI works today</span>\nclaude --interactive --listen-stdin\n  <span style=\"color:#7f848e;\"># keeps running, accepts prompts on stdin</span>\n  <span style=\"color:#7f848e;\"># sends responses on stdout</span>\n</pre>\n<table style=\"width:100%;margin-top:12px;border-collapse:collapse;\">\n<tr><td style=\"padding:4px 8px;color:#98c379;\">✓</td><td style=\"color:#e0e0e0;\">Instant response (~100ms)</td></tr>\n<tr><td style=\"padding:4px 8px;color:#e06c75;\">✗</td><td style=\"color:#e0e0e0;\">Claude CLI doesn't support this mode</td></tr>\n<tr><td style=\"padding:4px 8px;color:#e06c75;\">✗</td><td style=\"color:#e0e0e0;\">Memory grows unbounded</td></tr>\n<tr><td style=\"padding:4px 8px;color:#e06c75;\">✗</td><td style=\"color:#e0e0e0;\">Crashes affect all users</td></tr>\n</table>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"margin:0 0 12px 0;color:#c678dd;\">Option 3: Pre-warmed Pool (Medium)</h3>\n<p style=\"color:#e0e0e0;margin:0 0 12px 0;\">Keep N Claude processes idle, assign to requests, replace when done.</p>\n<pre style=\"background:#1e1e1e;padding:12px;border-radius:4px;overflow-x:auto;color:#e0e0e0;line-height:1.6;margin:0;\">\n<span style=\"color:#7f848e;\">Pool: [Claude1-idle] [Claude2-idle] [Claude3-idle]</span>\n\n<span style=\"color:#e5c07b;\">Request comes in</span> → grab Claude1, mark busy\n<span style=\"color:#e5c07b;\">Send prompt</span> → Claude1 processes\n<span style=\"color:#e5c07b;\">Done</span> → kill Claude1, spawn new idle Claude\n</pre>\n<table style=\"width:100%;margin-top:12px;border-collapse:collapse;\">\n<tr><td style=\"padding:4px 8px;color:#98c379;\">✓</td><td style=\"color:#e0e0e0;\">First prompt instant (process already running)</td></tr>\n<tr><td style=\"padding:4px 8px;color:#98c379;\">✓</td><td style=\"color:#e0e0e0;\">Full tool access</td></tr>\n<tr><td style=\"padding:4px 8px;color:#e06c75;\">✗</td><td style=\"color:#e0e0e0;\">~200MB RAM per idle process</td></tr>\n<tr><td style=\"padding:4px 8px;color:#e06c75;\">✗</td><td style=\"color:#e0e0e0;\">Complex pool management</td></tr>\n</table>\n</div>\n\n<div style=\"background:#2d2d2d;padding:16px;border-radius:6px;margin-bottom:16px;\">\n<h3 style=\"margin:0 0 12px 0;color:#56b6c2;\">Recommendation</h3>\n<table style=\"width:100%;border-collapse:collapse;\">\n<tr style=\"border-bottom:1px solid #444;\"><th style=\"padding:8px;text-align:left;color:#7f848e;\">Goal</th><th style=\"padding:8px;text-align:left;color:#7f848e;\">Best Option</th><th style=\"padding:8px;text-align:left;color:#7f848e;\">Effort</th></tr>\n<tr><td style=\"padding:8px;color:#e0e0e0;\">Remember context</td><td style=\"padding:8px;color:#98c379;\">Session Resume</td><td style=\"padding:8px;color:#98c379;\">Low</td></tr>\n<tr style=\"background:#3d3d3d;\"><td style=\"padding:8px;color:#e0e0e0;\">Faster first response</td><td style=\"padding:8px;color:#e5c07b;\">Pre-warmed Pool</td><td style=\"padding:8px;color:#e5c07b;\">Medium</td></tr>\n<tr><td style=\"padding:8px;color:#e0e0e0;\">Instant everything</td><td style=\"padding:8px;color:#e06c75;\">Not possible today</td><td style=\"padding:8px;color:#e06c75;\">-</td></tr>\n</table>\n</div>\n\n<div style=\"background:#1a3d3d;padding:12px 16px;border-radius:6px;border-left:4px solid #56b6c2;\">\n<strong style=\"color:#56b6c2;\">💡 Bottom Line:</strong>\n<span style=\"color:#e0e0e0;\"> The ~2-3s cold start is mostly unavoidable with Claude CLI's architecture. Session resume can preserve context, and pre-warming can hide the delay, but truly instant requires changes to how Claude CLI works.</span>\n</div>\n</div>",
    "requestedAt": "2026-01-05T12:52:00.000Z",
    "requestId": "1e312b2e-fd5b-4883-9574-d22492c37908",
    "choices": [
      {
        "label": "Try session resume",
        "value": "Let's implement session resume to preserve context between turns",
        "primary": true
      },
      {
        "label": "Pre-warmed pool",
        "value": "Show me how the current session pool works for Quick Turn"
      },
      {
        "label": "Back to work",
        "value": "What else can I help you with?"
      }
    ],
    "turnTiming": {
      "totalMs": 44871,
      "ttfeMs": 5077,
      "thinkingMs": 39402,
      "toolExecutionMs": 391,
      "toolCallCount": 1,
      "thinkingPct": 88,
      "toolsPct": 1,
      "ttfePct": 11
    }
  },
  "createdBy": "claude",
  "createdAt": "2026-01-05T13:14:21.547Z",
  "updatedAt": "2026-01-05T13:14:28.181Z",
  "requestId": "1e312b2e-fd5b-4883-9574-d22492c37908",
  "scope": "vibetools",
  "tags": [
    "architecture",
    "performance",
    "sessions"
  ],
  "targetUser": "claude"
}