Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/iCodeCraft/mathshownpx agentmods add skills/icodecraft/mathshow/show-mathWrote 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/icodecraft/mathshow/show-math)<a href="https://agentmods.dev/skills/icodecraft/mathshow/show-math"><img src="https://agentmods.dev/badge/skills/icodecraft/mathshow/show-math/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/icodecraft/mathshow/show-math"><img src="https://agentmods.dev/badge/skills/icodecraft/mathshow/show-math.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 | $0.00080 | $0.00437 |
| Opus 5.5 | $0.00032 | $0.00175 |
| Sonnet 5.5 | $0.00016 | $0.00087 |
| Haiku 4.5 | $0.00008 | $0.00044 |
Grade A, and why
show-math 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.
What it actually says
Show math
CLI transcripts cannot render LaTeX. When the user should see a formula, run mathshow. Do not wrap the agent. Do not generate an image of the formula.
Command
Prefer npx so no global install is required:
npx --yes mathshow -- '<latex>'
If mathshow is already on PATH:
mathshow -- '<latex>'
From this repo while developing:
node bin/mathshow.js -- '<latex>'
| Input | Example |
|---|---|
| One formula | npx --yes mathshow -- 'E = mc^2' |
| Several | npx --yes mathshow -- 'E = mc^2' 'F = ma' |
Markdown with $ / $$ / \[...\] |
npx --yes mathshow notes.md |
--no-open only in CI. Default must open the KaTeX browser preview.
Rules
- MUST run
mathshowwhen the reply contains math the user needs to see - MUST pass real TeX (
\int,\frac,\sum), not Unicode approximations as the source - NEVER skip the preview because the transcript already shows
$...$ - NEVER use image-generation tools to draw equations
- NEVER paste a screenshot instead of TeX
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 · 54 lines · 80 tokens per session scan A 1a3798da58a7
show-math is a skill published in the GitHub repository iCodeCraft/mathshow (3 stars, last pushed 2mo ago), licensed MIT. It adds 80 tokens to every session and 437 once invoked, about $0.0003 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 2026-08-31.
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