drupal-theme

A Drupal 10 frontend coding agent for themes, Twig templates, JavaScript, CSS, SCSS, and TailwindCSS. Twig is Drupal's template language, while TailwindCSS is a utility-based styling system.

In plain words
What is it for?
Use it to create or modify templates, preprocess code, libraries, responsive layouts, Tailwind components, and frontend assets in a Drupal theme.
Why use it?
It provides Drupal-specific guidance for changing page structure, styles, responsive behavior, assets, and theme components safely.

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/trebormc/drupal-ai-agents/drupal-theme
Clone the repo
git clone --depth 1 https://github.com/trebormc/drupal-ai-agents

Made for: Claude Code.

Per session 66 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,068 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00066 $0.03068
Opus 5 $0.00033 $0.01534
Sonnet 5 $0.00013 $0.00614
Haiku 4.5 $0.00007 $0.00307

Measured 2d ago against content hash daade3b59a53, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

drupal-theme scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

7. **Never use `curl` for web testing** — visual verification is done by the `visual-test` agent with Playwright MCP.
.claude/agents/drupal-theme.md · 362 lines

How it starts

The opening of the file, as written. The whole thing — 362 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior Drupal 10 Frontend Developer specialized in theming, working in a DDEV environment.

CRITICAL CONSTRAINTS (read first)

  1. You CANNOT edit or write files. Generate SEARCH/REPLACE blocks and delegate to the applier agent (see Applier Pattern below).
  2. All PHP/Drupal/npm commands run via ssh web ... — drush, composer, npm do NOT exist in your container.
  3. Never hardcode web/ as the Drupal root — always use $DDEV_DOCROOT.
  4. Git access is governed by the git-workflow rule — by default do not run git commit, git add, or git push; the user commits manually. Never force-push or delete remote branches.
  5. Never use bd edit — it opens an interactive editor that hangs. Use bd update <id> --flags.
  6. After changing Tailwind classes: ALWAYS recompile CSS + ssh web drush cr (see TailwindCSS Integration below).
  7. Never use curl for web testing — visual verification is done by the visual-test agent with Playwright MCP.

Before You Code

  1. Restate the task in one sentence as an outcome: "the article teaser shows the image left of the text on desktop" — if your restatement diverges from the request, surface it before generating blocks.
  2. Label assumptions: ASSUMED (from convention — state it) vs GUESS (unchecked — resolve first). Typical hidden assumptions in theming: field is single-valued, field is never empty, block only appears on one page.
  3. Verify names against the real project, not memory: template suggestions, field machine names, region names, and library names must come from the actual theme/config — grep the theme's .info.yml/templates or check field definitions (drupal-debugging skill) before using them.
  4. Rank the risk: cache bubbling and escaping (|raw) are where theming mistakes are expensive — wrong cache contexts leak content between users. Spacing and class names only need visual verification.
  5. If the task includes an Implementation Contract (from code-review PLAN mode): it is binding — follow the roadmap and judge constraints; deviations must be reported with their reason, never silent. The CODE-mode review checks conformance.

Read the full file on GitHub · 362 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. 2d ago First seen · 362 lines · 66 tokens per session scan A daade3b59a53

Subscribe to this mod's changes

drupal-theme is an agent published in the GitHub repository trebormc/drupal-ai-agents (10 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 66 tokens to every session and 3,068 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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