load-testing

load-testing is a skill for Claude Code, Codex from int2t05/engineering-skills. It costs 21 tokens per session (294 once invoked), scanned A, original, MIT.

A way to measure how much traffic a system can handle before it slows down or fails. It sends realistic or deliberately difficult workloads and observes saturation, errors, and scaling behavior.

In plain words
What is it for?
Use it before launch, after major architecture or dependency changes, when data or traffic grows, or when setting service targets such as response time and error rate.
Why use it?
It reveals capacity limits before real users encounter them and tests whether scaling rules and capacity expectations hold.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the engineering-skills plugin — 47 skills, 1 hook shipped together

Good fit Use it before launch, after major architecture or dependency changes, when data or traffic grows, or when setting service targets such as response time and error rate.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/int2t05/engineering-skills/load-testing
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 int2t05/engineering-skills --skill load-testing
Clone the repo
git clone --depth 1 https://github.com/int2t05/engineering-skills

Made for: Claude Code, Codex.

Or install engineering-skills, the plugin that ships this one along with the rest of its 47 skills, 1 hook.

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 load-testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/int2t05/engineering-skills/load-testing/github.svg)](https://agentmods.dev/skills/int2t05/engineering-skills/load-testing)
Your own site
<a href="https://agentmods.dev/skills/int2t05/engineering-skills/load-testing"><img src="https://agentmods.dev/badge/skills/int2t05/engineering-skills/load-testing/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 load-testing

Your own site · 80×15
<a href="https://agentmods.dev/skills/int2t05/engineering-skills/load-testing"><img src="https://agentmods.dev/badge/skills/int2t05/engineering-skills/load-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 294 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 $0.00021 $0.00294
Opus 5.5 $0.00008 $0.00118
Sonnet 5.5 $0.00004 $0.00059
Haiku 4.5 $0.00002 $0.00029

Measured 8d ago against content hash 5120fde75261, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

load-testing 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.

skills/06-test/load-testing/SKILL.md · 35 lines

What it actually says

Load Testing

When to use

  • Measure capacity under authorized representative traffic.

Not for: performance for bottlenecks; api-testing for correctness.

Steps

  1. Agree environment, traffic budget, load targets and stop conditions; do not assume production access.

  2. Build runnable scripts with realistic operations, datasets and arrivals; check functional responses first.

  3. Run relevant ramp, sustained, burst or stress profiles and observe latency, errors and saturation within agreed limits.

  4. Identify bottlenecks and recovery and record reproducible conditions in the approved capacity report.

Output: Suggested paths, subject to human audit: docs/CAPACITY.md for durable capacity decisions.

Verify

  • Scripts and actual measurements exist; errors and saturation inform conclusions and untested autoscaling remains unverified.

References

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 Changed · -93 lines · -44 tokens per session 5120fde75261
  2. 15d ago Changed · +3 lines 05fca10ccee7
  3. 1mo ago First seen · 125 lines · 65 tokens per session scan A e201b59c75d6

Subscribe to this mod's changes

load-testing is a skill published in the GitHub repository int2t05/engineering-skills (3 stars, last pushed 9d ago), licensed MIT. It adds 21 tokens to every session and 294 once invoked, about $0.0001 per session on Opus 5.5. 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.