drupal-events

drupal-events is a skill for Claude Code, Codex from edutrul/drupal-ai. It costs 30 tokens per session (418 once invoked), scanned A, original, MIT.

A guide to Drupal event subscribers, which are classes that run code when Drupal or Symfony announces an event. It covers request events, service registration, priorities, and choosing between events and hooks.

In plain words
What is it for?
Use it to observe or change request-time behavior and other event-driven parts of a Drupal module.
Why use it?
It gives you a structured place to respond to application events and inject services such as the current user.

Skill for Claude CodeCodex

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 skills/edutrul/drupal-ai/drupal-events
Any agent
npx skills add edutrul/drupal-ai --skill drupal-events
Clone the repo
git clone --depth 1 https://github.com/edutrul/drupal-ai

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 drupal-events

README.md
[![agentmods](https://agentmods.dev/badge/skills/edutrul/drupal-ai/drupal-events.svg)](https://agentmods.dev/skills/edutrul/drupal-ai/drupal-events)
Your own site
<a href="https://agentmods.dev/skills/edutrul/drupal-ai/drupal-events"><img src="https://agentmods.dev/badge/skills/edutrul/drupal-ai/drupal-events.svg" alt="Measured on agentmods" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 418 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 $0.00030 $0.00418
Opus 5 $0.00015 $0.00209
Sonnet 5 $0.00006 $0.00084
Haiku 4.5 $0.00003 $0.00042

Measured 4d ago against content hash d20eadc665ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

drupal-events 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 4d 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/skills/drupal-events/SKILL.md · 76 lines

What it actually says

Drupal Event Subscribers

Example (Best Practice)

// src/EventSubscriber/MyEventSubscriber.php
namespace Drupal\my_module\EventSubscriber;

use Drupal\Core\Session\AccountProxyInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\KernelEvents;

final class MyEventSubscriber implements EventSubscriberInterface {

  public function __construct(
    private readonly AccountProxyInterface $currentUser,
  ) {}

  public static function getSubscribedEvents(): array {
    return [
      // Note: Higher priority runs earlier. Default is 0.
      KernelEvents::REQUEST => ['onRequest', 100],
    ];
  }

  public function onRequest(RequestEvent $event): void {
    if (!$event->isMainRequest()) {
      return;
    }

    if (!$this->currentUser->isAuthenticated()) {
      return;
    }

    // Example: log or modify behavior for authenticated users.
  }

}

Register in services.yml

services:
  my_module.my_event_subscriber:
    class: Drupal\my_module\EventSubscriber\MyEventSubscriber
    arguments: ['@current_user']
    tags:
      - { name: event_subscriber }

Common Events

Event Constant When
Request KernelEvents::REQUEST Every request
Response KernelEvents::RESPONSE Before response sent
Terminate KernelEvents::TERMINATE After response sent
Exception KernelEvents::EXCEPTION On uncaught exception

Generate with Drush

drush generate event-subscriber --answers='{
  "module": "my_module",
  "class": "MyEventSubscriber",
  "event": "kernel.request"
}'
Files

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.

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. 4d ago First seen · 76 lines · 30 tokens per session scan A d20eadc665ef

Subscribe to this mod's changes

drupal-events is a skill published in the GitHub repository edutrul/drupal-ai (71 stars, last pushed 3mo ago), licensed MIT. It adds 30 tokens to every session and 418 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.