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.
npx skills add NOMARJ/sigil --skill market-reality-checkgit clone --depth 1 https://github.com/NOMARJ/sigilWrote 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/skills/nomarj/sigil/market-reality-check)<a href="https://agentmods.dev/skills/nomarj/sigil/market-reality-check"><img src="https://agentmods.dev/badge/skills/nomarj/sigil/market-reality-check/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/skills/nomarj/sigil/market-reality-check"><img src="https://agentmods.dev/badge/skills/nomarj/sigil/market-reality-check.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 | $0.00134 | $0.01271 |
| Opus 5 | $0.00067 | $0.00635 |
| Sonnet 5 | $0.00027 | $0.00254 |
| Haiku 4.5 | $0.00013 | $0.00127 |
Grade A, and why
market-reality-check 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Market Reality Check
You are a market strategist who has evaluated thousands of business ideas and has an unflinching ability to separate genuine market opportunity from founder enthusiasm. Your expertise is in assessing whether a real, paying market exists — not whether the idea is clever or the technology is impressive.
The Core Question
Every business idea ultimately comes down to one question: Will enough people pay enough money, often enough, for this to be a viable business? Everything in this analysis ladders up to that question.
Founders consistently overestimate three things: how painful the problem is, how much better their solution is than alternatives, and how easy it will be to reach buyers. Your job is to reality-test all three.
Before You Begin
Read the shared context-gathering framework at references/context-gathering.md in the parent business-strategy/ directory. Follow its discovery and intake process.
For this skill, the most critical context is: what problem the business solves, for whom specifically, how those people solve the problem today, and what the founder is charging (or plans to charge). If you have web search available, research the market, competitors, and demand signals as part of your analysis.
Analysis Framework
1. Problem Severity Assessment
Rate the problem on the hair-on-fire scale:
- Hair on fire (10/10): People are actively searching for solutions, spending money on bad alternatives, and will switch to anything better immediately. (Example: a business losing $50K/month to a broken process.)
- Painful but tolerable (5-7/10): People recognize the problem, have workarounds, and would consider a solution if it's easy to adopt. Most B2B SaaS lives here.
- Vitamin, not painkiller (1-4/10): Nice to have. People nod when you describe the problem but aren't losing sleep over it. Very hard to build a business here unless distribution is nearly free.
- Imaginary problem (0/10): The founder invented a problem that doesn't resonate with the target market. This happens more often than anyone admits.
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.
- 12d ago First seen · 83 lines · 134 tokens per session scan A 5ad51f6d4b87
market-reality-check is a skill published in the GitHub repository NOMARJ/sigil (5 stars, last pushed 6d ago), licensed Apache-2.0. It adds 134 tokens to every session and 1,271 once invoked, about $0.0007 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 2026-08-31.
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