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session-analysis-patterns

Claude Code session analysis, tool call patterns, efficiency metrics, and anti-pattern detection

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Session Analysis Patterns

Session Metrics

MetrikİyiOrtaKötü
Tokens per task<50K50-100K>100K
Tool calls per task<2020-40>40
Repeated reads0-12-3>3
Blind edits01>1
Agent spawn efficiency>80% useful50-80%<50%

Anti-Pattern Catalog

#PatternTespitFix
1Repeated ReadAynı dosya 3+ kez okunmuşBilgiyi ilk seferde kaydet
2Wide GrepPattern'siz geniş aramaSpesifik pattern + glob filter
3Blind EditDosya okumadan editRead → Edit sırası zorunlu
4Idle AgentAgent spawn edilip sonuç kullanılmamışGereksiz spawn etme
5Cascade FailAynı hata 3+ kez retryRoot cause analiz et
6Context PollutionAna context'te gereksiz büyük dosya okumaAgent'a delege et
7Premature AgentBasit iş için agent spawnDirekt tool kullan
8Missing ParallelBağımsız işler sıralıParalel agent/tool call
9Over-EngineeringBasit fix için büyük refactoringMinimal değişiklik

Efficiency Scorer (0-100)

def calculate_efficiency(session):
    score = 100

    # Penalties
    score -= session.repeated_reads * 5       # -5 per repeated read
    score -= session.blind_edits * 15         # -15 per blind edit
    score -= session.wide_greps * 3           # -3 per wide grep
    score -= session.idle_agents * 10         # -10 per idle agent
    score -= session.cascade_fails * 8        # -8 per cascade fail

    # Bonuses
    score += session.parallel_calls * 2       # +2 per parallel batch
    score += session.first_pass_success * 5   # +5 per first-try success

    return max(0, min(100, score))

Session Comparison

| Metrik | Session A | Session B | Delta |
|--------|-----------|-----------|-------|
| Total tokens | 45,000 | 120,000 | +167% |
| Tool calls | 12 | 38 | +217% |
| Time (min) | 3 | 12 | +300% |
| Tasks completed | 2 | 2 | 0% |
| Efficiency score | 88 | 42 | -52% |

Braintrust Log Analysis

# Session analizi
btca sessions list --last 7d
btca session <id> --metrics

# Pattern detection
btca session <id> --anti-patterns

# Cost analysis
btca sessions list --sort cost --desc

Checklist

  • Session token usage tracked
  • Anti-pattern detection aktif
  • Efficiency score > 70
  • Repeated reads < 2
  • Blind edits = 0
  • Parallel opportunities exploited
  • Agent spawn ROI positive

Anti-Patterns

  • Her session'ı analiz etmek (sadece outlier'ları analiz et)
  • Metric'lere takılıp task quality'yi ihmal etmek
  • Hız için correctness'tan ödün vermek

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