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 Mexregkan/claude-for-researchers --skill reality-checkgit clone --depth 1 https://github.com/Mexregkan/claude-for-researchersWrote 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/mexregkan/claude-for-researchers/reality-check)<a href="https://agentmods.dev/skills/mexregkan/claude-for-researchers/reality-check"><img src="https://agentmods.dev/badge/skills/mexregkan/claude-for-researchers/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/mexregkan/claude-for-researchers/reality-check"><img src="https://agentmods.dev/badge/skills/mexregkan/claude-for-researchers/reality-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00048 | $0.00697 |
| Opus 5 | $0.00024 | $0.00349 |
| Sonnet 5 | $0.00010 | $0.00139 |
| Haiku 4.5 | $0.00005 | $0.00070 |
Grade A, and why
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 — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/reality-check
Re-examine a contested claim in isolation to detect sycophantic capitulation.
Use this when you have pushed back on a Claude answer and are not sure whether Claude revised correctly or just agreed to avoid conflict.
The problem this solves
When you say "are you sure?" or "that sign looks wrong," Claude will often revise toward your suggestion even if the original answer was correct. The revision is stated with the same confidence as the original. You have no way to tell from the reply whether Claude actually found an error or just yielded.
This skill runs the check in a way that is insulated from the prior exchange.
Usage
/reality-check "the residue at s=1/2 is +1/2, not -1/2"
/reality-check "the Euler product converges absolutely for Re(s) > 1"
/reality-check (no argument — re-examine the last contested claim)
Steps
Step 1 — Extract the claim. Identify the specific assertion: the formula, sign, step, or statement that was contested. Strip it of the conversational context — state it as a bare mathematical or physical claim.
Step 2 — Check it independently. Derive or verify the claim from scratch, using only:
- The definitions and conventions stated in CLAUDE.md
- The content of brief.tex or workbook.tex (the authoritative documents)
- First principles
Do NOT use the prior conversation as evidence. Do not let the earlier exchange influence this derivation. If the answer this time differs from the original, say so explicitly and explain why.
Step 3 — Compare and report.
| Outcome | Response |
|---|---|
| Same answer as original | "The original answer was correct. I yielded incorrectly — reverting to [original answer]. Here is the reasoning: ..." |
| Different answer | "The revision was correct. The original error was: ..." |
| Genuinely ambiguous | "I cannot resolve this from first principles. The specific ambiguity is: ..." |
Always name which answer you are standing behind at the end of the report.
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 · 74 lines · 48 tokens per session scan A 7873d68f9070
reality-check is a skill published in the GitHub repository Mexregkan/claude-for-researchers (52 stars, last pushed 9d ago), licensed MIT. It adds 48 tokens to every session and 697 once invoked, about $0.0002 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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