Perl Patterns

This is the modern Perl guide you'd want if you're still writing Perl in 2024 or later. It covers the v5.36+ idioms that replace all that old boilerplate: built-in signatures, postfix dereferencing, the isa operator, and native try/catch in 5.40. You get concrete patterns for Moo classes, named regex captures, Path::Tiny file handling, and safe deep access on nested structures. The examples are copy-pasteable starting points meant to be adapted to your stack. Best used when refactoring legacy code or establishing team conventions, since it draws a clear line between old circumfix syntax and the cleaner modern equivalents. If you're stuck maintaining pre-5.36 code or teaching new devs, this will save arguments about style.

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last updated: Jul 14, 2026

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Install

$ npx -y skills add affaan-m/everything-claude-code --skill perl-patterns --agent claude-code

Installs into .claude/skills of the current project.

Files

Modern Perl Development Patterns

Idiomatic Perl 5.36+ patterns and best practices for building robust, maintainable applications.

When to Activate

Writing new Perl code or modules
Reviewing Perl code for idiom compliance
Refactoring legacy Perl to modern standards
Designing Perl module architecture
Migrating pre-5.36 code to modern Perl

How It Works

Apply these patterns as a bias toward modern Perl 5.36+ defaults: signatures, explicit modules, focused error handling, and testable boundaries. The examples below are meant to be copied as starting points, then tightened for the actual app, dependency stack, and deployment model in front of you.

Core Principles

1. Use `v5.36` Pragma

A single use v5.36 replaces the old boilerplate and enables strict, warnings, and subroutine signatures.

# Good: Modern preamble
use v5.36;

sub greet($name) {
    say "Hello, $name!";
}

# Bad: Legacy boilerplate
use strict;
use warnings;
use feature 'say', 'signatures';
no warnings 'experimental::signatures';

sub greet {
    my ($name) = @_;
    say "Hello, $name!";
}