Siege

Performs load, contract, chaos, mutation, and resilience testing on systems and APIs.

68|14|Updated Jan 7, 2026

Search Tags:#resilience #load testing #mutation testing #performance testing #chaos engineering #contract testing

Ready to run

npx skills add https://github.com/simota/agent-skills --skill siege

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Siege
Source: https://github.com/simota/agent-skills/tree/main/siege
Command: npx skills add https://github.com/simota/agent-skills --skill siege

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill proactively identifies system weaknesses by testing its limits under various conditions, preventing user-facing failures and ensuring reliability.

Core Features & Use Cases

Load Testing: Validate system capacity, throughput, and latency under expected and peak loads.
Contract Testing: Ensure API and service boundaries adhere to defined contracts.
Chaos Engineering: Inject controlled failures to test system resilience and recovery.
Mutation Testing: Assess the quality and effectiveness of existing test suites.
Resilience Verification: Validate retry, timeout, circuit breaker, and fallback mechanisms.
Use Case: Before a major product launch, use Siege to simulate Black Friday traffic levels to ensure the e-commerce platform remains stable and responsive.

Quick Start

Use the siege skill to run a load test against the staging API endpoint.

Frequently Asked Questions about Siege

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I run load testing to validate system capacity under peak traffic?▼

Yes, chaos engineering injects controlled failures to test system resilience and recovery. This validates retry, timeout, circuit breaker, and fallback mechanisms to ensure your architecture tolerates faults and recovers automatically.

What is mutation testing and when do I need it for my test suite?▼

Mutation testing assesses the quality and effectiveness of existing test suites. You need it when you want to verify whether your tests actually catch code defects, ensuring the suite is robust enough to prevent regressions before deployment.

How do I ensure my API boundaries adhere to defined contracts?▼

Contract testing ensures API and service boundaries adhere to defined contracts using tools like Pact. It identifies contract violations between services early, preventing integration failures and ensuring reliable service interactions.

What's the best way to verify system limits before a major product launch?▼

The best way to verify system limits is through non-functional testing covering load, chaos, and resilience verification. Simulate expected and peak traffic levels to expose bottlenecks, fault tolerance gaps, and API contract violations for remediation.