Async

What it does

When your agent uses it

• Working with async processing
• Background jobs

Example prompts

• “/async”

Requirements

• Node.js

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

1. 1HTTP < 200 ms. Toute opération qui dépasse ce seuil doit être déportée.
2. 2Idempotence obligatoire. Un message peut être rejoué — concevoir comme tel (idempotency keys, dedupe).
3. 3Retry + Dead Letter Queue. 3 tentatives, backoff exponentiel + jitter. Au-delà → DLQ + alerte.
4. 4Competing consumers. 4-8 workers en parallèle pour absorber les pics.
5. 5Lifecycle tracking. Logs structurés, métriques (latence, taux erreur, DLQ depth) et alertes.

What it can do on your machine

Read from SKILL.md and the folder at commit 99c1ee3. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are php).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Async loads about 741 tokens when it runs. Until then it costs about 44 tokens; SKILL.md has 240 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~44

When it runs · the whole SKILL.md, loaded when a task matches

~741

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from TheBeardedBearSAS/claude-craft at commit 99c1ee3, republished under its MIT licence (© TheBeardedBearSAS). 240 words, ~741 tokens.

name

async

description

Architecture async-first avec messaging et queues (Symfony Messenger, Laravel Queue, Ecotone). Use when working with async processing, queues, workers, background jobs.

context

fork files: ["config/packages/messenger.yaml", "config/queue.php", "app/Jobs/**", "src/Message/**", "src/MessageHandler/**"]

// Message (immutable DTO)
final class SendWelcomeEmail
{
    public function __construct(public readonly string $userId) {}
}

// Handler
final class SendWelcomeEmailHandler
{
    public function __invoke(SendWelcomeEmail $message): void
    {
        // Idempotency check
        if ($this->emailLog->wasSent($message->userId, 'welcome')) {
            return;
        }
        $this->mailer->sendWelcome($message->userId);
        $this->emailLog->record($message->userId, 'welcome');
    }
}

// Dispatch (controller)
$this->bus->dispatch(new SendWelcomeEmail($user->id));

© TheBeardedBearSAS, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in .claude/skills/async of TheBeardedBearSAS/claude-craft.

• SKILL.md
• REFERENCE.md

Open the folder on GitHubat commit 99c1ee3