plugin-init

A guide for creating a new Sylius plugin from the official starter template and preparing its Docker development environment. Sylius is a PHP framework for building online shops.

In plain words
What is it for?
Use it to begin a new Sylius plugin, configure its local Docker environment, and turn the starter project into a named plugin.
Why use it?
It lays out the initial project setup, naming, port checks, container startup, and plugin renaming steps that are easy to miss when starting manually.

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/guiziweb/guiziweb-plugins/plugin-init
Any agent
npx skills add Guiziweb/guiziweb-plugins --skill plugin-init
Clone the repo
git clone --depth 1 https://github.com/Guiziweb/guiziweb-plugins

Made for: Claude Code, Codex.

Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 600 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 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 $0.00017 $0.00600
Opus 5 $0.00009 $0.00300
Sonnet 5 $0.00003 $0.00120
Haiku 4.5 $0.00002 $0.00060

Measured yesterday against content hash da60e32d29e4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

plugin-init scanned grade C 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 yesterday.

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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf .git
plugins/sylius-plugin/skills/plugin-init/SKILL.md · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sylius Plugin Development

Creating a new plugin

Arguments are appended at the end as ARGUMENTS: Company PluginName "description". Parse them to get Company (PascalCase), PluginName (PascalCase), and Description.

If no arguments are provided, use AskUserQuestion to collect Company, PluginName, and Description.

  1. Derive the directory name from Company and PluginName: {Company}{Name}Plugin (PascalCase concatenation, e.g. Guiziweb + BlogGuiziwebBlogPlugin). The package name, namespace, and bundle class are set by rename-plugin.php in step 5.

  2. Clone the skeleton:

    git clone https://github.com/Sylius/PluginSkeleton.git {Company}{Name}Plugin
    cd {Company}{Name}Plugin
    rm -rf .git
    cp compose.override.dist.yml compose.override.yml
    
  3. Check ports: read compose.override.yml to identify exposed ports, then run lsof checks in parallel. If a port is in use, find a free port and update compose.override.yml.

  4. Initialize Docker (this takes several minutes — run in background using run_in_background: true):

    ENV=dev make init
    

    If error, run the same command again. Wait for completion before proceeding.

  5. Rename the plugin (via Docker, after make init finishes):

    docker compose exec php php bin/rename-plugin.php --company={Company} --plugin-name={Name} --description="{description}" --skip-interaction
    
  6. Initialize the database:

    make database-init && make load-fixtures
    
  7. Display setup summary to the user:

    Service URL
    Frontend http://localhost:{http_port}
    Admin http://localhost:{http_port}/admin
    MySQL localhost:{mysql_port}
    Mailhog http://localhost:{mailhog_port}

    Admin credentials: [email protected] / sylius

Next steps

  • Start adding resources to the plugin → /sylius-plugin:add-model
  • Once the plugin is feature-complete, create a GitHub repo and push
  • Publish on Packagist
  • Add a Symfony Flex recipe so integrators auto-install plugin assets

Read the full file on GitHub · 61 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. yesterday First seen · 61 lines · 17 tokens per session scan C da60e32d29e4

Subscribe to this mod's changes

plugin-init is a skill published in the GitHub repository Guiziweb/guiziweb-plugins (4 stars, last pushed 1mo ago), licensed MIT. It adds 17 tokens to every session and 600 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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