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pressure-test

pressure-test is a skill for Claude Code from melodic-software/claude-code-plugins. It costs 161 tokens per session (2,929 once invoked), scanned A, original, MIT.

A throwaway interactive prototype for trying a business rule, state machine, data model, or API by hand before building the final version. A state machine is a model of allowed states and transitions.

In plain words
What is it for?
Use it to simulate sequences of actions, test state transitions, sanity-check data shapes, and explore an API interactively.
Why use it?
It exposes awkward edge cases and incorrect assumptions while the design is still cheap to change.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the prototype plugin — 2 skills shipped together

not rated 30repo +1 changed 2mo ago A scan 161 tokens original MIT

Good fit Use it to simulate sequences of actions, test state transitions, sanity-check data shapes, and explore an API interactively.

Compare 6 skills from other repositories ↓
View source ↗ melodic-software/claude-code-plugins
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add melodic-software/claude-code-plugins
Claude Code
/plugin install prototype

Made for: Claude Code.

Or install prototype, the plugin that ships this one along with the rest of its 2 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 pressure-test

README.md
[![agentmods](https://agentmods.dev/badge/skills/melodic-software/claude-code-plugins/pressure-test/github.svg)](https://agentmods.dev/skills/melodic-software/claude-code-plugins/pressure-test)
Your own site
<a href="https://agentmods.dev/skills/melodic-software/claude-code-plugins/pressure-test"><img src="https://agentmods.dev/badge/skills/melodic-software/claude-code-plugins/pressure-test/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 pressure-test

Your own site · 80×15
<a href="https://agentmods.dev/skills/melodic-software/claude-code-plugins/pressure-test"><img src="https://agentmods.dev/badge/skills/melodic-software/claude-code-plugins/pressure-test.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 161 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,929 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 $0.00161 $0.02929
Opus 5.5 $0.00064 $0.01172
Sonnet 5.5 $0.00032 $0.00586
Haiku 4.5 $0.00016 $0.00293

Measured 2mo ago against content hash 28965cbe9eda, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pressure-test 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/detect-ecosystems.sh, scripts/detect-ecosystems.test.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

plugins/prototype/skills/pressure-test/SKILL.md · 224 lines

How it starts

The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository context. Gather first

Collect these with individual Bash calls, one command per call, never combined into a single invocation:

  • Current branch, git branch --show-current
  • Working tree status (empty = clean), git status --porcelain | head -10

The pipe is the bound and belongs in the command. A read-time cap ("read only the first 10 entries") bounds nothing: the Bash tool returns the command's complete output into context before there is anything to decide about.

Treat a failure (not a repository, git unavailable) as an unknown value and carry on. Keep these as separate body Bash calls rather than pre-compute lines: the harness runs a skill's whole pre-compute block as one shell invocation, and a worktree-isolated session refuses a compound command that contains git.

Pre-computed context

Project ecosystems: !${CLAUDE_SKILL_DIR}/scripts/detect-ecosystems.sh 2>/dev/null || echo "none detected"

Variables

Arguments: $ARGUMENTS

Purpose

A disposable interactive shell driving a state model by hand, a terminal app by default, a shareable HTML demo when the audience calls for it. Use when the question is about business logic, state transitions, or data shape. Things that look reasonable on paper but only feel wrong once pushed through real cases.

The shared throwaway rules, the auto-invoke gate, and how to capture the answer live in ${CLAUDE_PLUGIN_ROOT}/context/discipline.md. Read it before you start. This file covers only the logic facet.

If the question is "what should this look like". Wrong facet. Invoke /prototype:explore-directions via the Skill tool.

When this is the right shape

  • "Does this state machine handle the edge case where X then Y?"
  • "Does this data model represent the case where...?"
  • "What should the API surface look like before writing it?"
  • Anything where pressing buttons and watching state change reveals the answer

Two shells. TUI default

Two disposable shells can front the same portable logic module (step 3 below), the terminal app (the default) and a self-contained HTML demo. Both run the same process; only the shell swaps. Route by audience:

Read the full file on GitHub · 224 lines

Files

What ships with it

3 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. 2mo ago Changed · +5 lines 28965cbe9eda
  2. 2mo ago Changed · +15 lines · -3 tokens per session 5586c5b4724a
  3. 2mo ago First seen · 204 lines · 164 tokens per session scan A 7f0775f38dc1

Subscribe to this mod's changes

pressure-test is a skill published in the GitHub repository melodic-software/claude-code-plugins (30 stars, last pushed today), licensed MIT. It adds 161 tokens to every session and 2,929 once invoked, about $0.0006 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 2026-09-03.

Claude CodePlanningagentsai-toolsmarketplacemcpplugins
Related

pressure-test compared with skills from other repositories

pressure-test next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
pressure-testmelodic-software/claude-code-pluginsSkill30todayMITA161Claude Code
solve-constraint-puzzlejimmc414/claude-code-plugin-marketplaceSkill4yesterdayMITA36Claude Code
documentation-optimisersystempromptio/systemprompt-marketplaceSkill21mo agononeA81Claude Code
reddit-audience-findersystempromptio/systemprompt-marketplaceSkill21mo agononeA84Claude Code
content-strategy-mastersystempromptio/systemprompt-marketplaceSkill21mo agononeA49Claude Code
imagegenopenai/codexSkill135kyesterdayApache-2.0A113Codex
playwright-climicrosoft/playwrightSkill100kyesterdayApache-2.0A19Claude Code