idea-check

idea-check is a skill for Claude Code, Codex from mnemox-ai/idea-reality-mcp. It costs 53 tokens per session (276 once invoked), scanned A, original, MIT.

A pre-build research guide that checks whether an idea already has competitors on GitHub, Hacker News, npm, PyPI, and Stack Overflow. It is used before starting a project or deciding whether to build or buy.

In plain words
What is it for?
Evaluating project ideas, finding competing products or libraries, scoring competition, and suggesting ways to differentiate or pivot.
Why use it?
It helps reveal existing alternatives and the level of competition before development time is committed.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Evaluating project ideas, finding competing products or libraries, scoring competition, and suggesting ways to differentiate or pivot.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mnemox-ai/idea-reality-mcp/idea-check
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.

Any agent
npx skills add mnemox-ai/idea-reality-mcp --skill idea-check
Clone the repo
git clone --depth 1 https://github.com/mnemox-ai/idea-reality-mcp

Made for: Claude Code, Codex.

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 idea-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/mnemox-ai/idea-reality-mcp/idea-check/github.svg)](https://agentmods.dev/skills/mnemox-ai/idea-reality-mcp/idea-check)
Your own site
<a href="https://agentmods.dev/skills/mnemox-ai/idea-reality-mcp/idea-check"><img src="https://agentmods.dev/badge/skills/mnemox-ai/idea-reality-mcp/idea-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.

agentmods 80×15 button for idea-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/mnemox-ai/idea-reality-mcp/idea-check"><img src="https://agentmods.dev/badge/skills/mnemox-ai/idea-reality-mcp/idea-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 276 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00053 $0.00276
Opus 5 $0.00026 $0.00138
Sonnet 5 $0.00011 $0.00055
Haiku 4.5 $0.00005 $0.00028

Measured 12d ago against content hash 617bd97c2040, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

idea-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.

skills/idea-check/SKILL.md · 25 lines

What it actually says

Idea Reality Check

When to use

  • Starting a new project or side project
  • Evaluating whether to build or buy
  • Researching competitors before a sprint
  • Validating a feature idea before implementation

Instructions

  1. Ask the user for a natural-language description of their idea
  2. Call the idea_check MCP tool with the idea text
  3. Use depth="quick" for fast checks (GitHub + HN), depth="deep" for comprehensive analysis (all 5 sources)
  4. Present the reality_signal score (0-100) and interpret it:
    • 0-30: Low competition — green light to build
    • 31-60: Moderate competition — differentiation needed
    • 61-80: High competition — find a niche or pivot
    • 81-100: Very high competition — consider contributing to existing projects instead
  5. List the top 3 competitors with star counts and descriptions
  6. Share the pivot_hints for actionable next steps
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. 12d ago First seen · 25 lines · 53 tokens per session scan A 617bd97c2040

Subscribe to this mod's changes

idea-check is a skill published in the GitHub repository mnemox-ai/idea-reality-mcp (815 stars, last pushed 1mo ago), licensed MIT. It adds 53 tokens to every session and 276 once invoked, about $0.0003 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 2026-08-30.

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