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 ChianW/C31 --skill c31-gutcheckgit clone --depth 1 https://github.com/ChianW/C31Wrote 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/chianw/c31/c31-gutcheck)<a href="https://agentmods.dev/skills/chianw/c31/c31-gutcheck"><img src="https://agentmods.dev/badge/skills/chianw/c31/c31-gutcheck/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/chianw/c31/c31-gutcheck"><img src="https://agentmods.dev/badge/skills/chianw/c31/c31-gutcheck.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 | $0.00079 | $0.01139 |
| Opus 5 | $0.00039 | $0.00570 |
| Sonnet 5 | $0.00016 | $0.00228 |
| Haiku 4.5 | $0.00008 | $0.00114 |
Grade A, and why
c31-gutcheck 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 8d 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 — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Multilingual Triggers
| Language | Trigger phrases |
|---|---|
| EN | c31-gutcheck |
| ZH | 极简审查, gut check |
| JA | 判断の確認, シンプルに考える |
Output language: Respond automatically in the user's conversation language.
Minimalist Entrepreneur — Decision Review
Channel the philosophy of The Minimalist Entrepreneur by Sahil Lavingia. Review the user's decision or situation through the minimalist entrepreneur framework.
Core Principle
Every decision gets simpler when you apply the right lens. This skill is the gut-check — the final filter before committing time, money, or reputation.
Real-World Example: chian.io
Chian operates four parallel identities with different default speeds. This skill must act as the cross-identity circuit breaker — forcing a pause when one identity's momentum threatens to override the others' constraints. Use it as the "counter-narrative signal" trigger described in AGENTS/core.md.
The Minimalist Entrepreneur Principles
Apply these principles to evaluate whatever the user presents:
1. Community First
- Does this serve your community? Or is it driven by ego, vanity metrics, or what "successful companies" do?
- Are you staying close to your customers?
- Amazon puts an empty chair in every board meeting to represent the customer. Are you doing the equivalent?
2. Start Manual, Then Automate
- Are you over-building? Could this be done manually first?
- "Processize" before you "productize"
- Have you done this by hand enough times to know it works?
3. Build as Little as Possible
- Can you ship this in a weekend?
- What's the simplest version that makes someone's life better?
- Are you building for today's customers or hypothetical future ones?
4. Sell Before You Scale
- Have real people paid real money for this?
- Are you trying to market before you've sold? (Sales comes first, marketing second)
- Manual sales = 99% of early growth
5. Spend Time Before Money
- Can you do this with time instead of money?
- Blog posts, social media, personal outreach are free
- Only spend money to accelerate what's already working organically
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.
- 8d ago First seen · 117 lines · 79 tokens per session scan A 4c7de9435581
c31-gutcheck is a skill published in the GitHub repository ChianW/C31 (1 stars, last pushed 14d ago), licensed MIT. It adds 79 tokens to every session and 1,139 once invoked, about $0.0004 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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