Startup Skill is a collection of agent skills for researching, evaluating, and planning startup ideas, including competitor analysis, market positioning, financial projections, and investor pitches. It is for founders and teams deciding whether an idea is worth pursuing and how to present or develop it. The catalogue contains four skills, two instructions, and one plugin from the project.
Borrowing it
Nothing to install: this file belongs to ferdinandobons/startup-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ferdinandobons/startup-skill/main/AGENTS.mdgit clone --depth 1 https://github.com/ferdinandobons/startup-skillWrote 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/instructions/ferdinandobons/startup-skill/agents-md)<a href="https://agentmods.dev/instructions/ferdinandobons/startup-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/ferdinandobons/startup-skill/agents-md/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/instructions/ferdinandobons/startup-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/ferdinandobons/startup-skill/agents-md.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 | $0.02416 | $0.02416 |
| Opus 5.5 | $0.00966 | $0.00966 |
| Sonnet 5.5 | $0.00483 | $0.00483 |
| Haiku 4.5 | $0.00242 | $0.00242 |
Grade A, and why
startup-skill AGENTS.md 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 1mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- startup-skill CLAUDE.md — 94% identical, 17 lines differ
How it starts
The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidelines for AI agents working in this repository.
Repository Overview
This repository contains the startup plugin for AI agents. The plugin namespace is startup, and it includes multiple skills organized in 3 categories: Design, Analyze, and Build (4 skills total).
- Name: Startup Skills
- GitHub: ferdinandobons/startup-skill
- Creator: Ferdinando Bons
- License: MIT
Skill Taxonomy
| Category | Purpose | Skills |
|---|---|---|
| Design | Full process, idea to validated plan | startup-design |
| Analyze | Deep standalone analysis of one area | startup-competitors, startup-positioning |
| Build | Post-validation execution tools | startup-pitch |
Repository Structure
startup-skill/ # Plugin namespace (startup:*)
├── .claude-plugin/
│ └── marketplace.json # Plugin definition (name must be "startup")
├── startup-design/ # Skill: startup:startup-design
│ ├── SKILL.md # Main skill file (~476 lines, 8 phases + pre-flight & customer discovery)
│ └── references/ # Supporting documents loaded on demand
│ ├── research-principles.md
│ ├── research-scaling.md
│ ├── research-wave-1-market.md
│ ├── research-wave-2-competitors.md
│ ├── research-wave-3-customers.md
│ ├── research-wave-4-distribution.md
│ ├── research-synthesis.md
│ ├── verification-agent.md
│ ├── customer-interview.md
│ ├── intake-questions.md
│ ├── output-specs.md
│ ├── frameworks.md
│ ├── industry-benchmarks.md
│ ├── honesty-protocol.md
│ └── output-guidelines.md
├── startup-competitors/ # Skill: startup:startup-competitors
│ ├── SKILL.md # Main skill file (~268 lines, 3 waves)
│ └── references/
│ ├── research-principles.md
│ ├── research-scaling.md
│ ├── research-wave-1-profiles-pricing.md
│ ├── research-wave-2-sentiment-mining.md
│ ├── research-wave-3-gtm-signals.md
│ ├── research-synthesis.md
│ ├── verification-agent.md
│ └── honesty-protocol.md
├── startup-positioning/ # Skill: startup:startup-positioning
│ ├── SKILL.md # Main skill file (~302 lines, 2 waves)
│ └── references/
│ ├── research-principles.md
│ ├── research-scaling.md
│ ├── research-wave-1-alternatives.md
│ ├── research-wave-2-market-frame.md
│ ├── research-synthesis.md
│ ├── verification-agent.md
│ ├── frameworks.md
│ └── honesty-protocol.md
├── startup-pitch/ # Skill: startup:startup-pitch
│ ├── SKILL.md # Main skill file (~424 lines, 2 waves)
│ └── references/
│ ├── research-principles.md
│ ├── research-scaling.md
│ ├── research-wave-1-audience-narrative.md
│ ├── research-wave-2-competitive-framing.md
│ ├── research-synthesis.md
│ ├── verification-agent.md
│ ├── pitch-frameworks.md
│ └── honesty-protocol.md
├── CLAUDE.md
├── AGENTS.md
├── CONTRIBUTING.md
├── LICENSE
└── README.md
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.
- 1mo ago First seen · 211 lines · 2,416 tokens per session scan A 94a45832afd0
startup-skill AGENTS.md is an instructions file published in the GitHub repository ferdinandobons/startup-skill (1,228 stars, last pushed 3mo ago), licensed MIT. It adds 2,416 tokens to every session, about $0.0097 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 2026-08-30.
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