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 sandeepmvl/rails-skills --skill 12-hotwire-turbo-stimulusgit clone --depth 1 https://github.com/sandeepmvl/rails-skillsWrote 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/sandeepmvl/rails-skills/12-hotwire-turbo-stimulus)<a href="https://agentmods.dev/skills/sandeepmvl/rails-skills/12-hotwire-turbo-stimulus"><img src="https://agentmods.dev/badge/skills/sandeepmvl/rails-skills/12-hotwire-turbo-stimulus/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/sandeepmvl/rails-skills/12-hotwire-turbo-stimulus"><img src="https://agentmods.dev/badge/skills/sandeepmvl/rails-skills/12-hotwire-turbo-stimulus.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 | $0.00151 | $0.03649 |
| Opus 5 | $0.00076 | $0.01825 |
| Sonnet 5 | $0.00030 | $0.00730 |
| Haiku 4.5 | $0.00015 | $0.00365 |
Grade A, and why
hotwire-turbo-stimulus 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.
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 — 374 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Hotwire: Turbo + Stimulus
Build reactive Rails UIs without a JS framework. AI agents reach for React on every interactive feature — they grew up on SPAs and don't know that Hotwire covers ~90% of the same ground with server-rendered HTML. This skill encodes when Hotwire wins, what each Turbo primitive does, and how Stimulus fits.
Why this matters
Adding React/Vue to a Rails app means: a build pipeline, a separate state model, duplicate routing, an API layer, and an entirely different testing story. Most apps don't need it. Hotwire keeps you in Rails for the UI, sending HTML over the wire and letting Turbo + Stimulus handle interactivity.
The opinion
Hotwire (Turbo + Stimulus) is the default for Rails 8 UI. Reach for React/Vue only when (a) you need offline-first, (b) you need native-feel mobile-web with heavy client-side state, (c) you have an existing component library that's worth keeping, or (d) the team has explicit JS-framework expertise that outweighs the integration cost.
Counter-positions:
- React with Inertia.js — server-rendered React via Rails controllers. Best of both worlds for teams that want React's component model but Rails' routing. See v0.2
react-with-rails. - htmx — even more minimal than Turbo. Fine if you don't need Stimulus's state model. Not the Rails-native answer.
The four primitives
Turbo Drive ← Page navigation (replaces the browser's default — faster, no full page reload)
Turbo Frames ← Lazy/independent HTML islands within a page
Turbo Streams ← Server-pushed HTML updates (WebSocket or response body)
Stimulus ← Sprinkled JS controllers for client-side state
Core patterns
Pattern 1: Turbo Drive — navigation that feels SPA-fast
Default behavior (Rails 8): every link click and form submit is intercepted by Turbo. The new HTML is fetched, the <body> is swapped, no full reload. Looks and feels instant.
What you need to know:
<script>tags in the new HTML don't re-evaluate (each<script>runs once per page lifetime; only re-fires if you<script data-turbo-eval="true">).window.onload/DOMContentLoadedfire only once on the original load. Useturbo:loadinstead.- Stimulus controllers re-attach automatically on Turbo navigation.
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.
- 12d ago First seen · 374 lines · 151 tokens per session scan A 6bdf14cd7bff
hotwire-turbo-stimulus is a skill published in the GitHub repository sandeepmvl/rails-skills (21 stars, last pushed 3mo ago), licensed MIT. It adds 151 tokens to every session and 3,649 once invoked, about $0.0008 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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