# Chaos Engineering

> The practice of injecting controlled faults into a running system to test a stated hypothesis about how it recovers.

Record: `architecture:chaos-engineering`
Kind: activity
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Severity: contextual
Scope: system, resilience, operations
Canonical: https://banes-lab.com/ontology#architecture-chaos-engineering

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Canary Deployment](https://banes-lab.com/records/architecture/canary-deployment.md) and before [Graceful Shutdown](https://banes-lab.com/records/architecture/graceful-shutdown.md).

## Repair

- Refactored by: Introduce Controlled Fault Injection
- Detected by: no fault-injection testing of recovery paths
- Violated by: resilience assumed but never exercised
- Measured by: unverified failure-mode count
- Enforced by: resilience review

## Requires

- [Observability](https://banes-lab.com/records/architecture/observability.md)

## Reinforces

- [Self-Healing Architecture](https://banes-lab.com/records/architecture/self-healing-architecture.md)
- [Fault Tolerance](https://banes-lab.com/records/architecture/fault-tolerance.md)

## Enables

- [Empirical Resilience Verification](https://banes-lab.com/records/lexicon/empirical-resilience-verification.md)

## Conflicts with

- [Untested Failure Assumptions](https://banes-lab.com/records/lexicon/untested-failure-assumptions.md)

## In tension with

- [Production Risk](https://banes-lab.com/records/lexicon/production-risk.md)

## Tensions

- [Chaos Engineering / Production Risk](https://banes-lab.com/records/tension/chaos-engineering-production-risk.md)

## Severity

- [contextual](https://banes-lab.com/records/vocabulary/severity-contextual.md)

## Category

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/records/architecture-category/self-healing-recovery-deployment-safety.md)

## Linked from

- [What can drift, seen through how it drifts](https://banes-lab.com/software-architecture/coverage/what-can-drift-seen-through-how-it-drifts.md)
- [Error Handling / Resilience](https://banes-lab.com/ontology/principles/architecture-category-error-handling-resilience.md)
- [Observability / Auditability / Traceability](https://banes-lab.com/ontology/principles/architecture-category-observability-auditability-traceability.md)
- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/ontology/principles/architecture-category-self-healing-recovery-deployment-safety.md)
- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/ontology/lexicon/lexicon-category-self-healing-recovery-deployment-safety.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)