stress-test-deity

stress-test-deity is a skill for Claude Code from v0idOS/performance-deity. It costs 0 tokens per session (296 once invoked), scanned A, original, MIT.

A red-team testing guide that tries to break an application with unusual inputs, very large data, and simulated network or database failures.

In plain words
What is it for?
Use it to test input validation, large-payload handling, and behavior during service outages.
Why use it?
It helps reveal crashes, memory problems, endless loops, and poor failure handling before users encounter them.

Skill for Claude Code

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

Part of the performance-deity plugin — 17 skills shipped together

Good fit Use it to test input validation, large-payload handling, and behavior during service outages.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/v0idos/performance-deity/stress-test-deity
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 v0idOS/performance-deity --skill stress-test-deity
Clone the repo
git clone --depth 1 https://github.com/v0idOS/performance-deity

Made for: Claude Code.

Or install performance-deity, the plugin that ships this one along with the rest of its 17 skills.

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 stress-test-deity

README.md
[![agentmods](https://agentmods.dev/badge/skills/v0idos/performance-deity/stress-test-deity/github.svg)](https://agentmods.dev/skills/v0idos/performance-deity/stress-test-deity)
Your own site
<a href="https://agentmods.dev/skills/v0idos/performance-deity/stress-test-deity"><img src="https://agentmods.dev/badge/skills/v0idos/performance-deity/stress-test-deity/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 stress-test-deity

Your own site · 80×15
<a href="https://agentmods.dev/skills/v0idos/performance-deity/stress-test-deity"><img src="https://agentmods.dev/badge/skills/v0idos/performance-deity/stress-test-deity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 296 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00000 $0.00296
Opus 5 $0.00000 $0.00148
Sonnet 5 $0.00000 $0.00059
Haiku 4.5 $0.00000 $0.00030

Measured 8d ago against content hash 0a980b89a24d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

stress-test-deity scanned grade A with 0 findings 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 8d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

archive/stress-test-deity/SKILL.md · 36 lines

What it actually says

Stress Test Deity: Chaos Engineering

Description

This skill acts as a Red Team. Its goal is to intentionally break the user's application by passing extreme edge cases, massive payloads, and simulating network failures.

Triggers

Activate when the user mentions:

  • "stress test"
  • "red team"
  • "chaos engineering", "fuzzing"
  • "harden this"
  • Or explicitly runs /plugin performance-deity:stress-test

Core Directives

Phase 1: The Fuzzer

  1. Write a script that bombards the target function with:
    • 1GB string payloads.
    • null, undefined, NaN, -1.
    • Deeply nested recursive JSON objects.
    • Malformed Unicode strings.
  2. Simulate network drops or database timeouts if applicable.

Phase 2: The Attack

  1. Run the fuzzer.
  2. Document exactly which inputs caused unhandled exceptions, memory exhaustion, or infinite loops.

Phase 3: Hardening

  1. Add strict input validation at the boundary.
  2. Add pagination or streaming for massive payloads.
  3. Add circuit breakers or retry-with-backoff for network dependencies.

Phase 4: Resilience Proof

  1. Run the fuzzer again.
  2. Show the user how the app now gracefully degrades (returning 400 Bad Request or safely exiting) instead of crashing.
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. 8d ago First seen · 36 lines · 0 tokens per session scan A 0a980b89a24d

Subscribe to this mod's changes

stress-test-deity is a skill published in the GitHub repository v0idOS/performance-deity (2 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 296 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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