chaos-application-faults

chaos-application-faults is a skill for Claude Code from dungnotnull/hybrid-harness-chaos-process-prm. It costs 94 tokens per session (3,558 once invoked), scanned A, original, MIT.

A guide for designing and running chaos tests that deliberately disrupt an application's pods, containers, network, DNS, or connected services. It produces runnable Litmus YAML files for these tests.

In plain words
What is it for?
Use it to simulate pod or container crashes, network delays, DNS problems, and service timeouts, with defined limits and checks for whether the application remains healthy.
Why use it?
It helps you test how a service behaves during failures without having to plan each disruption and its safety checks manually.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the hybrid-harness-chaos-process plugin — 37 skills, 4 commands shipped together

Good fit Use it to simulate pod or container crashes, network delays, DNS problems, and service timeouts, with defined limits and checks for whether the application remains healthy.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dungnotnull/hybrid-harness-chaos-process-prm/s19-application-faults
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add dungnotnull/hybrid-harness-chaos-process-prm --skill s19-application-faults
Clone the repo
git clone --depth 1 https://github.com/dungnotnull/hybrid-harness-chaos-process-prm

Made for: Claude Code.

Or install hybrid-harness-chaos-process, the plugin that ships this one along with the rest of its 37 skills, 4 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for chaos-application-faults

README.md
[![agentmods](https://agentmods.dev/badge/skills/dungnotnull/hybrid-harness-chaos-process-prm/s19-application-faults/github.svg)](https://agentmods.dev/skills/dungnotnull/hybrid-harness-chaos-process-prm/s19-application-faults)
Your own site
<a href="https://agentmods.dev/skills/dungnotnull/hybrid-harness-chaos-process-prm/s19-application-faults"><img src="https://agentmods.dev/badge/skills/dungnotnull/hybrid-harness-chaos-process-prm/s19-application-faults/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for chaos-application-faults

Your own site · 80×15
<a href="https://agentmods.dev/skills/dungnotnull/hybrid-harness-chaos-process-prm/s19-application-faults"><img src="https://agentmods.dev/badge/skills/dungnotnull/hybrid-harness-chaos-process-prm/s19-application-faults.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 94 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,558 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00094 $0.03558
Opus 5 $0.00047 $0.01779
Sonnet 5 $0.00019 $0.00712
Haiku 4.5 $0.00009 $0.00356

Measured 12d ago against content hash d73b4bf48d6d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

chaos-application-faults scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

# Verify: curl -w "\nTotal time: %{time_total}s\n" http://<SERVICE_A>/health
skills/s19-application-faults/SKILL.md · 499 lines

How it starts

The opening of the file, as written. The whole thing — 499 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Chaos Application Faults (s17)

Purpose

Produce complete, safe, runnable application-level chaos experiments that test service resilience against pod failures, container crashes, network degradation, DNS misconfiguration, and dependency timeouts.


Prerequisites

  • Chaos experiment designs from s14 (Experiment Design)
  • Target application deployed and accessible
  • Steady state defined from s17 (Steady State)
  • Blast radius approved from s16 (Blast Radius Control)
  • Observability active and monitoring application metrics

Input Contract

Input Source Required
Experiment design framework s12 (workflow_context.artifacts) Yes
Service definitions + pod labels s05 output Yes
Blast radius constraints s14 output Yes
Steady state probes s15 output Yes
Risk tolerance preferences s02 taste (risk_tolerance) Yes

Output Contract

Output Destination Format
App fault ChaosExperiments .commandcode/artifacts/experiment-app-<fault>.yaml Litmus YAML
App fault ChaosEngines .commandcode/artifacts/engine-app-<fault>.yaml Litmus YAML
Network fault configurations .commandcode/artifacts/experiment-network-<fault>.yaml Litmus YAML
Recovery runbook s18 (game day), s25 (postmortem) Markdown

Application Fault Catalog

Fault LitmusChaos Name Risk Scope Prod Safe?
Pod Delete pod-delete Low Namespaced Yes (≤30%)
Pod CPU Hog pod-cpu-hog Low Namespaced Yes (≤30%)
Pod Memory Hog pod-memory-hog Medium Namespaced Yes (≤30%)
Container Kill container-kill Medium Namespaced Yes (≤30%)
Pod HTTP Latency pod-http-latency Low Namespaced Yes
Pod Network Loss pod-network-loss High Namespaced With approval
Pod Network Latency pod-network-latency Medium Namespaced Yes
Pod DNS Error pod-dns-error Medium Namespaced With approval
Pod DNS Spoof pod-dns-spoof High Namespaced No (staging only)
Pod IO Stress pod-io-stress Medium Namespaced With approval

Read the full file on GitHub · 499 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 499 lines · 94 tokens per session scan A d73b4bf48d6d

Subscribe to this mod's changes

chaos-application-faults is a skill published in the GitHub repository dungnotnull/hybrid-harness-chaos-process-prm (19 stars, last pushed 3mo ago), licensed MIT. It adds 94 tokens to every session and 3,558 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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