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Use when planning, running, or learning from chaos engineering experiments. Triggers on "chaos experiment", "fault injection", "gameday", "resilience test", "blast radius", "steady state", "abort criteria", "Chaos Toolkit", "Chaos Mesh", "Litmus", "Gremlin", "AWS FIS", or any deliberate failure-injection question. Ships experiment designer, blast-radius calculator, and postmortem generator (all stdlib Python), 4 references on chaos principles + experiment design + attack taxonomy + tooling lands
Passed 19 of 21 test cases with the skill, and 13 of 21 without it.
and 5 more in the full report
6 fixed14 passed either way2 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.
A proposed chaos experiment on a non-critical staging synthetic flow burns 0.2% of the error budget. What risk classification level and formal recommendation apply to this experiment?
| Checked | Without skill | With skill |
|---|---|---|
| Assigns a risk score of GREEN. | Missed | Passed |
| Gives the formal recommendation to PROCEED. | Passed | Passed |
The instructions your model reads when the skill loads.
Design experiments that surface real weaknesses in production systems — without becoming outages. Most "chaos engineering" attempts skip steady-state measurement, define no abort criteria, and have no blast-radius bound. This skill enforces the discipline that makes chaos experiments safe and useful.
incident-response)red-team, threat-detection)The 4 Principles of Chaos Engineering (Netflix, 2016):
Add a fifth: Define abort criteria up front. A chaos experiment with no abort criteria is an outage by another name.
SKILL=engineering/chaos-engineering/skills/chaos-engineering
# 1. Design an experiment
python "$SKILL/scripts/experiment_designer.py" --target "checkout-svc" --hypothesis "p99 latency stays <500ms" --attack latency --duration-min 15
# 2. Calculate blast radius
test cases passed, vs 13 / 21 without
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