3d-shape-captcha

3d-shape-captcha is a skill for Claude Code, Codex from LSTM-Kirigaya/jinhui-skills. It costs 128 tokens per session (1,269 once invoked), scanned A, original, no licence file.

A browser-based 3D geometry CAPTCHA system built with Three.js, a JavaScript library for rendering 3D graphics. Users compare six differently sized shapes and click as required, with the server supplying each shape's details.

In plain words
What is it for?
Use it to create or modify a click-based 3D geometry CAPTCHA or add one to sensitive operations.
Why use it?
It provides a size-comparison challenge for actions that need extra protection, such as sending email verification codes.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: model in frontmatter.

Good fit Use it to create or modify a click-based 3D geometry CAPTCHA or add one to sensitive operations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lstm-kirigaya/jinhui-skills/3d-shape-captcha
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 LSTM-Kirigaya/jinhui-skills --skill 3d-shape-captcha
Clone the repo
git clone --depth 1 https://github.com/LSTM-Kirigaya/jinhui-skills

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 3d-shape-captcha

README.md
[![agentmods](https://agentmods.dev/badge/skills/lstm-kirigaya/jinhui-skills/3d-shape-captcha/github.svg)](https://agentmods.dev/skills/lstm-kirigaya/jinhui-skills/3d-shape-captcha)
Your own site
<a href="https://agentmods.dev/skills/lstm-kirigaya/jinhui-skills/3d-shape-captcha"><img src="https://agentmods.dev/badge/skills/lstm-kirigaya/jinhui-skills/3d-shape-captcha/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 3d-shape-captcha

Your own site · 80×15
<a href="https://agentmods.dev/skills/lstm-kirigaya/jinhui-skills/3d-shape-captcha"><img src="https://agentmods.dev/badge/skills/lstm-kirigaya/jinhui-skills/3d-shape-captcha.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 128 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,269 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.
Origin unknown 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 $0.00128 $0.01269
Opus 5 $0.00064 $0.00634
Sonnet 5 $0.00026 $0.00254
Haiku 4.5 $0.00013 $0.00127

Measured 12d ago against content hash d6801eb2e4c9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

3d-shape-captcha 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.

The scan reads SKILL.md. This mod also ships 1 executable file (assets/api-index.js), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/3d-shape-captcha/SKILL.md · 112 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 112 lines · 128 tokens per session scan A d6801eb2e4c9

Subscribe to this mod's changes

3d-shape-captcha is a skill published in the GitHub repository LSTM-Kirigaya/jinhui-skills (24 stars, last pushed 21d ago), with no licence file. It adds 128 tokens to every session and 1,269 once invoked, about $0.0006 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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