end-user-validate

end-user-validate is an agent for coding agents from krzemienski/proofpunk. It costs 69 tokens per session (335 once invoked), scanned A, original, no licence file.

An agent that tests a completed change by using the real system as an end user.

In plain words
What is it for?
It is for validating browser workflows, HTTP requests, command-line tools, simulators, and terminal interfaces after production changes.
Why use it?
It checks actual behavior through real interactions instead of relying only on code inspection or isolated tests.

Agent

Part of the proofpunk plugin — 18 skills, 12 commands, 4 agents, 6 hooks shipped together

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.

agentmods
npx agentmods add agents/krzemienski/proofpunk/end-user-validate
Clone the repo
git clone --depth 1 https://github.com/krzemienski/proofpunk

Or install proofpunk, the plugin that ships this one along with the rest of its 18 skills, 12 commands, 4 agents, 6 hooks.

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 end-user-validate

README.md
[![agentmods](https://agentmods.dev/badge/agents/krzemienski/proofpunk/end-user-validate.svg)](https://agentmods.dev/agents/krzemienski/proofpunk/end-user-validate)
Your own site
<a href="https://agentmods.dev/agents/krzemienski/proofpunk/end-user-validate"><img src="https://agentmods.dev/badge/agents/krzemienski/proofpunk/end-user-validate.svg" alt="Measured on agentmods" height="20"></a>
Per session 69 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 335 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 $0.00069 $0.00335
Opus 5 $0.00034 $0.00168
Sonnet 5 $0.00014 $0.00067
Haiku 4.5 $0.00007 $0.00034

Measured 4d ago against content hash 664a85707c3c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

end-user-validate 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 4d 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.

description: Drives the real system as the end user to prove a completed change — browser clicks, real curl payloads, real CLI invocations, simulator, or PTY for TUIs. Produces run-scoped evidence and a per-criterion ver
plugins/proofpunk/agents/end-user-validate.md · 31 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 4d ago First seen · 31 lines · 69 tokens per session scan A 664a85707c3c

Subscribe to this mod's changes

end-user-validate is an agent published in the GitHub repository krzemienski/proofpunk (4 stars, last pushed yesterday), with no licence file. It adds 69 tokens to every session and 335 once invoked, about $0.0003 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 2026-08-31.

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