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 BitYoungjae/marketplace --skill desmos-graphinggit clone --depth 1 https://github.com/BitYoungjae/marketplaceWrote 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/bityoungjae/marketplace/desmos-graphing)<a href="https://agentmods.dev/skills/bityoungjae/marketplace/desmos-graphing"><img src="https://agentmods.dev/badge/skills/bityoungjae/marketplace/desmos-graphing/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/bityoungjae/marketplace/desmos-graphing"><img src="https://agentmods.dev/badge/skills/bityoungjae/marketplace/desmos-graphing.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 | $0.00044 | $0.02619 |
| Opus 5 | $0.00022 | $0.01309 |
| Sonnet 5 | $0.00009 | $0.00524 |
| Haiku 4.5 | $0.00004 | $0.00262 |
Grade A, and why
desmos-graphing 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 11d 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 — 320 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Desmos Graphing in Obsidian
⚠️ CRITICAL: Dual Parser System
The plugin uses different parsers for different parts:
| Location | Parser | pi | sqrt | Example |
|---|---|---|---|---|
| Settings | mathjs | pi |
- | left=-2*pi+0.5 |
| Equations | Desmos (LaTeX) | \pi |
\sqrt{x} |
y=\sqrt{x}+\pi |
| Points | Desmos (LaTeX) | \pi |
\sqrt{x} |
(\pi/2, 1) |
| Restrictions | plain math | numeric | x^0.5 |
x>-1.5708 |
✅ CORRECT
left=-0.5; right=2*pi+0.5
---
y=\sqrt{x}|blue
y=x/\sqrt{3}|green|0<=x<=3^0.5
(\pi/2, 0)|label:cos(90°)=0
❌ WRONG (will error)
left=-2*\pi # Error: "Syntax error in part '\pi'"
y=\sin(x+pi/4) # Error: "Too many variables" (p*i)
(pi/2, 0) # Error: "Too many variables" ← Points need LaTeX!
y=x/sqrt(3)|0<=x<=sqrt(3) # Error: "Too many variables" (s*q*r*t)
Key rule: \sqrt{x} in equations, x^0.5 in restrictions!
Code Block Format
```desmos-graph
[settings]
---
[equations]
```
- Settings (optional) above
---, equations below - Each equation on its own line
- Use
|to add styling/restrictions to equations
Quick Start
Basic Function
```desmos-graph
y=x^2
y=\sin(x)|blue
```
With Settings
```desmos-graph
left=-2*pi; right=2*pi
bottom=-2; top=2
---
y=\sin(x)|red
y=\cos(x)|blue|dashed
```
Points and Labels
```desmos-graph
(0, 0)|label:Origin
(3, 4)|red|label:Point A
(\pi/2, 1)|blue|label:π/2 # Use \pi in coordinates!
y=x|dashed
```
⚠️ Points use LaTeX: (\pi/2, 0) not (pi/2, 0)
Essential Settings
| Setting | Default | Description |
|---|---|---|
width |
600 | Graph width in pixels |
height |
400 | Graph height in pixels |
left |
-10 | Left boundary |
right |
10 | Right boundary |
bottom |
-7 | Bottom boundary |
top |
7 | Top boundary |
grid |
true | Show grid lines |
degreeMode |
radians | radians or degrees |
What ships with it
1 file 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.
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.
- 11d ago First seen · 320 lines · 44 tokens per session scan A 42da0f345ff6
desmos-graphing is a skill published in the GitHub repository BitYoungjae/marketplace (6 stars, last pushed 3mo ago), licensed MIT. It adds 44 tokens to every session and 2,619 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 2026-08-31.
Other skills, from other repositories
html-ppt-zhangzara-pin-and-paper
A field-biology capstone on urban pollinator decline — the survey design, the data, the contribution, and the caveats. Built as a decision-grade coursework defense deck for faculty reviewers.
proof-writer
A tool for writing or checking rigorous mathematical proofs for claims such as theorems, lemmas, propositions, and corollaries.
tooluniverse-organic-chemistry
Organic chemistry reasoning guide for reaction product prediction, mechanism analysis (electrophilic/nucleophilic substitution, addition, elimination, pericyclic, radical), and spectroscopy interpretation (1H/13C NMR, IR, MS). Reasons from first principles (electron flow, kinetic vs thermodynamic) rather than…
scaffold-exercises
Scaffold a graded problem set with sections, problems, worked solutions, and short "why this matters" explainers across analytical, empirical, and coding types. Use when user says "make a problem set on X", "scaffold exercises for this lecture", "create practice problems", "generate homework with a solution key"…
edu-chem-reaction
A guide for turning a chemical reaction into a self-contained interactive 3D web demonstration. It shows molecules changing while also displaying the balanced equation, explanations, atom counts, and optionally an energy curve.
edu-solid-geometry
A guide for turning a three-dimensional geometry problem into a self-contained interactive web lesson. It combines step-by-step mathematical working with a rotatable 3D model made with Three.js.