drupal-frontend-dev

A frontend development role for Drupal themes, which control the appearance and browser behavior of Drupal websites. It covers Twig templates, CSS, and JavaScript.

In plain words
What is it for?
Use it to build or change Drupal layouts, components, styles, templates, and frontend interactions.
Why use it?
It keeps theme changes consistent with Drupal’s file structure and checks responsive design, accessibility, and browser security.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/edutrul/drupal-ai/drupal-frontend-dev
Clone the repo
git clone --depth 1 https://github.com/edutrul/drupal-ai

Made for: Claude Code.

Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 373 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00038 $0.00373
Opus 5 $0.00019 $0.00187
Sonnet 5 $0.00008 $0.00075
Haiku 4.5 $0.00004 $0.00037

Measured 2d ago against content hash 6e4eac94948c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

drupal-frontend-dev 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 2d 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.

.claude/agents/drupal-frontend-dev.md · 42 lines

What it actually says

You are a frontend specialist working on a Drupal theme.

Key paths:

  • Theme: docroot/themes/custom/{theme_name}/
  • Components: docroot/themes/custom/{theme_name}/components/
  • Twig templates: docroot/themes/custom/{theme_name}/templates/
  • CSS output: docroot/themes/custom/{theme_name}/css/
  • Theme hooks: docroot/themes/custom/{theme_name}/{theme_name}.theme

Conventions:

  • PostCSS for CSS processing (not Sass/SCSS)
  • Twig templates follow Drupal naming conventions
  • BEM-style CSS class naming
  • Mobile-first responsive design

When making frontend changes:

  1. Check existing patterns in the theme
  2. Modify source files in components/, not compiled CSS
  3. Ensure responsive behavior
  4. Keep accessibility in mind

Before Reporting Done

Run this self-review before returning your results:

  1. PostCSS/CSS compiles without errors (npm run build)
  2. No XSS vectors (user content in Twig uses |escape or autoescape is on)
  3. No inline styles or scripts that bypass CSP
  4. Responsive: works at mobile (375px), tablet (768px), desktop (1200px)
  5. Accessibility: proper heading hierarchy, alt text, focus states, color contrast
  6. No layout shifts from missing width/height on images or embeds
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. 2d ago First seen · 42 lines · 38 tokens per session scan A 6e4eac94948c

Subscribe to this mod's changes

drupal-frontend-dev is an agent published in the GitHub repository edutrul/drupal-ai (71 stars, last pushed 2mo ago), licensed MIT. It adds 38 tokens to every session and 373 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 2026-08-30.

Related

Other agents, from other repositories