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.
git clone --depth 1 https://github.com/timurgaleev/vibestackWrote 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.
[](https://agentmods.dev/agents/timurgaleev/vibestack/rapid-prototyper)<a href="https://agentmods.dev/agents/timurgaleev/vibestack/rapid-prototyper"><img src="https://agentmods.dev/badge/agents/timurgaleev/vibestack/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.
<a href="https://agentmods.dev/agents/timurgaleev/vibestack/rapid-prototyper"><img src="https://agentmods.dev/badge/agents/timurgaleev/vibestack/rapid-prototyper.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00041 | $0.03524 |
| Opus 5.5 | $0.00016 | $0.01410 |
| Sonnet 5.5 | $0.00008 | $0.00705 |
| Haiku 4.5 | $0.00004 | $0.00352 |
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 19d 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.
This is a copy
95% identical to Rapid Prototyper — 41 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 467 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
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.
- 19d ago First seen · 467 lines · 41 tokens per session scan A bb1d154093f3
rapid-prototyper is an agent published in the GitHub repository timurgaleev/vibestack (7 stars, last pushed 7d ago), licensed MIT. It adds 41 tokens to every session and 3,524 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 95% identical to Rapid Prototyper, differing in 41 lines, and is treated as a copy.
Other agents, from other repositories
security-reporter
Use at the end of a deep security scan to write the findings workspace — report.md, per-finding reports, hardening recommendations, and the three JSON automation files (scan-manifest, findings, coverage).
security-judge
Use during a deep security scan, after validation, as the single SERIAL dedup pass over surviving findings. Classifies each as new / better-example-of-known / duplicate, fixes final severity, assigns slugs.
security-finder
Use during a deep security scan to hunt vulnerabilities inside one assigned partition of the attack surface. Traces data flow from user inputs to sensitive sinks and writes candidate findings incrementally to a partition file.
security-recon
Use at the start of a deep security scan to map the attack surface of a repository and partition it into non-overlapping segments for parallel vulnerability finders. Produces scan-manifest.json.
security-triage
Use in a deep security scan's optional Semgrep hybrid mode to classify a batch of SAST results as true positive, false positive, or hard-excluded, reading the flagged code with real context.
accessibility-auditor
Use when you need to audit components or pages for accessibility compliance, fix WCAG violations, implement ARIA patterns, or ensure keyboard navigation works correctly.