Build-an-X workflow for a chaos experiment per the Principles of Chaos Engineering - defines steady-state hypothesis, picks the variables (real-world events: network latency, node failure, region outage), sets the blast radius (which percentage / namespace / user cohort), automates execution, and emits the verdict (steady-state held / didn't hold). Includes the five-check pre-flight validation of the steady-state hypothesis (measurable, baselined, SLI-backed tolerance, defined measurement window, metric moves under the fault) with hard-reject rules, and routes the tool choice: Chaos Mesh has its own standalone skill, while LitmusChaos and Gremlin setup live in this skill's references. Use to scope and pre-flight-validate a chaos experiment before running it via Chaos Mesh / Litmus / Gremlin / Toxiproxy.