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ab-test-engine

Use for A/B experiments on OpenAmer configs and skills.

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SKILL.md (original)

Review the instructions the agent will receive before you install.

A/B Test Engine

CLI-Tool für automatische Experimente mit Skills + Configs in OpenAmer.

Verzeichnisse

PfadZweck
~/.ab-tests/experiments/JSON-Experimentdefinitionen
~/.ab-tests/results/Ergebnisdaten pro Experiment
~/.ab-tests/metrics/Raw-Metrik-Snapshots

CLI-Befehle

python scripts/ab-test-engine.py --create <name> '<beschreibung>' --variant 'key=value[,key=value]'
python scripts/ab-test-engine.py --list
python scripts/ab-test-engine.py --status <name>
python scripts/ab-test-engine.py --conclude <name>
python scripts/ab-test-engine.py --collect
python scripts/ab-test-engine.py --analyze
python scripts/ab-test-engine.py --switch <name> --to variant|control
python scripts/ab-test-engine.py --restore <name>

Workflow

1. Experiment anlegen

python scripts/ab-test-engine.py --create skill-loader-test "Vergleicht lazy vs eager Skill-Loader" --variant 'skill_loader=lazy,skill_cache_size=512'

2. Automatische Metrikerfassung

  • --collect → alle 30 min (Cron-Job)
  • Liest Cron-Exit-Codes, Dauer, RAM-Nutzung
  • Bildet Composite Score aus Exit-Codes (60%), Dauer (30%), RAM (10%)

3. Statistische Analyse

python scripts/ab-test-engine.py --conclude skill-loader-test
  • Welch's t-Test (ungleiche Varianzen)
  • p-Wert + Cohen's d
  • Winner-Empfehlung

4. Automation (Cron)

Im OpenAmer-Cron einrichten:

- name: ab-test-collect
  schedule: "*/30 * * * *"
  command: python scripts/ab-test-engine.py --collect
  description: Sammelt A/B-Test-Metriken alle 30min

- name: ab-test-analyze
  schedule: "0 6 * * *"
  command: python scripts/ab-test-engine.py --analyze
  description: Analysiert abgelaufene A/B-Tests täglich 6 Uhr

Fallstricke

  • Mindestens 3 Samples pro Gruppe nötig für t-Test
  • Bei < 2 Samples wird σ=0 gesetzt
  • RAM-Messung ohne psutil ist ungenau (Fallback WMIC / fixed total)
  • --switch verändert die aktive config.yaml direkt
  • Cron-Log-Pfad: $OPENAMER_HOME/cron/cron.log
  • Normalapproximation bei df > 100 für p-Wert
  • Nutze --restore um Config auf Control-Zustand zurückzusetzen

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