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 DojoCodingLabs/code-sensei --skill web-basicsgit clone --depth 1 https://github.com/DojoCodingLabs/code-senseiWrote 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/dojocodinglabs/code-sensei/web-basics)<a href="https://agentmods.dev/skills/dojocodinglabs/code-sensei/web-basics"><img src="https://agentmods.dev/badge/skills/dojocodinglabs/code-sensei/web-basics/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/dojocodinglabs/code-sensei/web-basics"><img src="https://agentmods.dev/badge/skills/dojocodinglabs/code-sensei/web-basics.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 | $0.00038 | $0.00620 |
| Opus 5.5 | $0.00015 | $0.00248 |
| Sonnet 5.5 | $0.00008 | $0.00124 |
| Haiku 4.5 | $0.00004 | $0.00062 |
Grade A, and why
web-basics 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- web-basics — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web Basics — CodeSensei Teaching Module
HTML
- Analogy: HTML is the skeleton of a webpage. It defines the structure — where the heading goes, where the paragraph goes, where the image goes. Like the blueprint of a house showing where rooms are.
- Key insight: HTML uses "tags" that come in pairs:
<tag>content</tag>. The tag tells the browser what KIND of content it is. - Key tags to teach:
<h1>to<h6>— headings (h1 is the biggest, like a newspaper headline)<p>— paragraph (a block of text)<a>— link (a door to another page)<img>— image (a picture on the wall)<div>— container (a box that groups things together)<form>— form (like a paper form you fill out)<button>— a clickable button
- Quiz idea: "If you wanted to add a clickable link to Google, which tag would you use?"
CSS
- Analogy: CSS is the paint, wallpaper, and furniture of the house. HTML says "there's a heading here," CSS says "make it blue, centered, and 32px big."
- Key insight: CSS works by SELECTING an HTML element and then STYLING it. It's always: "who are you targeting?" + "what should they look like?"
- Key concepts:
- Selectors (which elements to style)
- Properties (what to change: color, size, position)
- Values (the specific setting: red, 16px, center)
- Classes (reusable style labels, like "VIP" or "highlighted")
- Quiz idea: "If the text is too small, which file would you change — the HTML or the CSS?"
How Browsers Work
- Analogy: A browser is like a translator + artist. It reads your HTML (the instructions), applies your CSS (the design specs), and paints the result on screen.
- Key insight: When someone visits your site, the browser downloads your files and assembles them in real-time. That's why you see the page "load."
- Teaching flow: User types URL → Browser requests files from server → Server sends HTML/CSS/JS → Browser assembles and displays the page
The Relationship
HTML = Structure (what's on the page)
CSS = Style (how it looks)
JS = Behavior (what it does)
Think of it as: HTML is the house frame, CSS is the interior design, JavaScript is the electricity and plumbing that makes things work.
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 · 45 lines · 38 tokens per session scan A 9f38d2d9a64c
web-basics is a skill published in the GitHub repository DojoCodingLabs/code-sensei (14 stars, last pushed 16d ago), licensed MIT. It adds 38 tokens to every session and 620 once invoked, about $0.0002 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 2026-08-30.
Other skills, from other repositories
web-basics
HTML, CSS, and how browsers work. Activated when Claude creates or edits .html or .css files. Provides teaching context for CodeSensei to explain web fundamentals.
aceternity-ui
100+ animated React components (Aceternity UI) for Next.js with Tailwind. Use for hero sections, parallax, 3D effects, or encountering animation, shadcn CLI integration errors.
Role: Frontend Styler
Frontend styling: layout debugging, style consistency, CSS best practices for Svelte/SvelteKit.
Web: Review
Review an existing interface: collate its assets, publish an observation logger built for it, run passes that fix, write back, check and export, and end at sign-off.
onboard
Use when a new developer needs to understand the project, or the user asks for an onboarding or setup guide.
animation-vocabulary
Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop in; "the iOS rubber-band scroll" → Rubber-banding). Use when the user asks "what's it called when…", or describes a motion effect without knowing its name and…