bootstrap

bootstrap is a skill for Claude Code, Codex from G1Joshi/Agent-Skills. It costs 37 tokens per session (1,475 once invoked), scanned A, original, MIT.

A CSS framework with ready-made layouts, responsive styles, and interface components such as menus, dialogs, and navigation bars.

In plain words
What is it for?
Use it for prototypes, admin panels, internal tools, and responsive web pages.
Why use it?
It provides common styling patterns so you can build usable interfaces without designing every layout and component from scratch.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: $skill-name invocation.

Good fit Use it for prototypes, admin panels, internal tools, and responsive web pages.

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Install with agentmods
npx agentmods add skills/g1joshi/agent-skills/bootstrap
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 G1Joshi/Agent-Skills --skill bootstrap
Clone the repo
git clone --depth 1 https://github.com/G1Joshi/Agent-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 bootstrap

README.md
[![agentmods](https://agentmods.dev/badge/skills/g1joshi/agent-skills/bootstrap/github.svg)](https://agentmods.dev/skills/g1joshi/agent-skills/bootstrap)
Your own site
<a href="https://agentmods.dev/skills/g1joshi/agent-skills/bootstrap"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/bootstrap/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 bootstrap

Your own site · 80×15
<a href="https://agentmods.dev/skills/g1joshi/agent-skills/bootstrap"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/bootstrap.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,475 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 original 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 $0.00037 $0.01475
Opus 5.5 $0.00015 $0.00590
Sonnet 5.5 $0.00007 $0.00295
Haiku 4.5 $0.00004 $0.00147

Measured 17d ago against content hash afb2366d6ca0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bootstrap 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 17d 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.

skills/frameworks/bootstrap/SKILL.md · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bootstrap

Bootstrap 5 dropped jQuery and embraced modern CSS (Grid, Flexbox, Variables). It remains the safest choice for admin panels and internal tools.

When to Use

  • Rapid Prototyping & MVPs: Quickly laying out responsive pages with pre-built components and utilities.
  • Administrative Portals & Back-Office Dashboards: Building clean, accessible user interfaces without a dedicated design team.
  • Responsive Grid Layouts: Utilizing mobile-first 12-column flexbox and CSS Grid layout systems.
  • Design System Customization with Sass: Overriding theme variables, color palettes, and breakpoints.

Quick Start

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link
      href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
      rel="stylesheet"
    />
    <title>Bootstrap Demo</title>
  </head>
  <body>
    <div class="container py-5">
      <div class="row g-4">
        <div class="col-md-6">
          <div class="card p-4 shadow-sm">
            <h2 class="card-title">Responsive Card</h2>
            <p class="text-muted">Built with Bootstrap 5 utilities.</p>
            <button class="btn btn-primary">Action</button>
          </div>
        </div>
      </div>
    </div>
  </body>
</html>

Core Concepts

Responsive 12-Column Grid & Flexbox Utilities

Mobile-first layout containers adapting to viewports:

<div class="container-fluid px-4 py-5">
  <div class="row g-4 align-items-center">
    <div class="col-12 col-md-6 col-lg-4">
      <div class="card h-100 shadow-sm border-0">
        <div class="card-body d-flex flex-column justify-content-between">
          <h5 class="card-title text-primary">Standard Plan</h5>
          <p class="card-text text-muted">
            Complete features for growing teams.
          </p>
          <a href="#" class="btn btn-primary mt-3 w-100">Get Started</a>
        </div>
      </div>
    </div>
    <div class="col-12 col-md-6 col-lg-4">
      <div class="card h-100 shadow-lg border-primary">
        <div class="card-body d-flex flex-column justify-content-between">
          <h5 class="card-title text-success">Enterprise Plan</h5>
          <p class="card-text text-muted">
            Dedicated infrastructure and SLA guarantees.
          </p>
          <a href="#" class="btn btn-success mt-3 w-100">Contact Sales</a>
        </div>
      </div>
    </div>
  </div>
</div>

Read the full file on GitHub · 181 lines

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. 17d ago Changed · +5 lines afb2366d6ca0
  2. 21d ago Changed · +131 lines · +23 tokens per session 8b9ac6f2e55c
  3. 1mo ago First seen · 45 lines · 14 tokens per session scan A 90deaadb2d67

Subscribe to this mod's changes

bootstrap is a skill published in the GitHub repository G1Joshi/Agent-Skills (15 stars, last pushed 18d ago), licensed MIT. It adds 37 tokens to every session and 1,475 once invoked, about $0.0001 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 2026-09-03.

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