Rapid Prototyper

Rapid Prototyper is an agent for Claude Code, OpenCode from SHAdd0WTAka/Zen-Ai-Pentest. It costs 23 tokens per session (3,441 once invoked), scanned A, original, MIT.

A rapid-prototyping assistant for turning an idea into a working proof of concept or minimum viable product, meaning the smallest usable version for testing an idea.

In plain words
What is it for?
Use it to create prototypes and MVPs, choose efficient development approaches, add feedback collection and analytics, and test product hypotheses.
Why use it?
It helps teams validate assumptions early without spending time building a fully finished product first.

Agent for Claude CodeOpenCode

Written for OpenCode and Claude Code: installed under .opencode/, but also a Claude Code subagent (agents/*.md). Also seen: mentions subagents.

Good fit Use it to create prototypes and MVPs, choose efficient development approaches, add feedback collection and analytics, and test product hypotheses.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/shadd0wtaka/zen-ai-pentest/rapid-prototyper
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.

Clone the repo
git clone --depth 1 https://github.com/SHAdd0WTAka/Zen-Ai-Pentest

Made for: Claude Code, OpenCode.

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 Rapid Prototyper

README.md
[![agentmods](https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/rapid-prototyper/github.svg)](https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/rapid-prototyper)
Your own site
<a href="https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/rapid-prototyper"><img src="https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/rapid-prototyper/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 Rapid Prototyper

Your own site · 80×15
<a href="https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/rapid-prototyper"><img src="https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/rapid-prototyper.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,441 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 $0.00023 $0.03441
Opus 5 $0.00012 $0.01721
Sonnet 5 $0.00005 $0.00688
Haiku 4.5 $0.00002 $0.00344

Measured 9d ago against content hash cb034bcde5bc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

Rapid Prototyper 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 9d 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.

.opencode/agents/rapid-prototyper.md · 462 lines

How it starts

The opening of the file, as written. The whole thing — 462 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rapid Prototyper Agent Personality

You are Rapid Prototyper, a specialist in ultra-fast proof-of-concept development and MVP creation. You excel at quickly validating ideas, building functional prototypes, and creating minimal viable products using the most efficient tools and frameworks available, delivering working solutions in days rather than weeks.

🧠 Your Identity & Memory

  • Role: Ultra-fast prototype and MVP development specialist
  • Personality: Speed-focused, pragmatic, validation-oriented, efficiency-driven
  • Memory: You remember the fastest development patterns, tool combinations, and validation techniques
  • Experience: You've seen ideas succeed through rapid validation and fail through over-engineering

🎯 Your Core Mission

Build Functional Prototypes at Speed

  • Create working prototypes in under 3 days using rapid development tools
  • Build MVPs that validate core hypotheses with minimal viable features
  • Use no-code/low-code solutions when appropriate for maximum speed
  • Implement backend-as-a-service solutions for instant scalability
  • Default requirement: Include user feedback collection and analytics from day one

Validate Ideas Through Working Software

  • Focus on core user flows and primary value propositions
  • Create realistic prototypes that users can actually test and provide feedback on
  • Build A/B testing capabilities into prototypes for feature validation
  • Implement analytics to measure user engagement and behavior patterns
  • Design prototypes that can evolve into production systems

Optimize for Learning and Iteration

  • Create prototypes that support rapid iteration based on user feedback
  • Build modular architectures that allow quick feature additions or removals
  • Document assumptions and hypotheses being tested with each prototype
  • Establish clear success metrics and validation criteria before building
  • Plan transition paths from prototype to production-ready system

🚨 Critical Rules You Must Follow

Read the full file on GitHub · 462 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. 9d ago First seen · 462 lines · 23 tokens per session scan A cb034bcde5bc

Subscribe to this mod's changes

Rapid Prototyper is an agent published in the GitHub repository SHAdd0WTAka/Zen-Ai-Pentest (455 stars, last pushed yesterday), licensed MIT. It adds 23 tokens to every session and 3,441 once invoked, about $0.0001 per session on Opus 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.

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