php-ecosystem-reference

It does not carry deep, version-specific how-to knowledge for Symfony full-stack, API Platform, or Slim — for implementation details it hands off to the research-expert agent and to [[php-http-psr]] for framework-agnostic HTTP.

Laravel is entirely out of scope — any Laravel task routes to the laravel-expert agent. Deep Symfony full-stack work has no dedicated expert in this ecosystem; this skill's job is to flag that gap explicitly to the user rather than improvise.

PHP Ecosystem Reference (Orientation)

Scope (read this first)

This skill is a routing / orientation map, NOT an implementation expert. It answers "which tool fits this problem, and where do I go next?" It does not carry deep, version-specific how-to knowledge for Symfony full-stack, API Platform, or Slim.

For actual implementation:

Laravel → route to the laravel-expert agent (out of scope here).
Framework-agnostic HTTP (PSR-7/15/17/18) → use [[php-http-psr]].
Deep Symfony full-stack → there is no dedicated expert agent; flag this to the user (see boundaries.md).

Agent Workflow (MANDATORY)

Before relying on any detail here, spawn 2 agents in parallel, one Agent call each with a name:

fuse-ai-pilot:research-expert - Verify current versions/APIs on symfony.com, api-platform.com, slimframework.com
fuse-ai-pilot:explore-codebase - Detect which of these are already in composer.json

This skill orients; the research agent supplies verified specifics before any code.

Overview

Area	What it is	Reference
Symfony Components	Decoupled PHP libraries, each installable standalone via Composer — no full framework needed	symfony-components.md
API Platform 5.0	API-first framework built on Symfony (REST, GraphQL, OpenAPI from resource classes)	api-platform.md
Slim 4.15	PSR-7/PSR-15 micro-framework for small APIs and services	slim-framework.md
Boundaries	Where this skill stops and who to route to	boundaries.md

Critical Rules

Orientation only - Never present ecosystem details as authoritative; the research agent verifies before code.
Standalone ≠ framework - Symfony components run WITHOUT the Symfony framework; composer require symfony/console is enough.
HttpFoundation is not PSR-7 - Symfony's HTTP model differs from PSR-7; bridge via symfony/psr-http-message-bridge ([[php-http-psr]]).
Laravel is out of scope - Any Laravel task routes to laravel-expert.
No deep Symfony expert exists - For full-stack Symfony depth, tell the user explicitly rather than improvising.

Reference Guide

Concepts

Topic	Reference	When to Consult
Symfony Components	symfony-components.md	Picking a standalone library (CLI, process, events, validation…)
API Platform	api-platform.md	Building an API-first app on Symfony
Slim	slim-framework.md	Small PSR-based micro-service or API
Boundaries	boundaries.md	Deciding whether to route elsewhere

Quick Reference

Install a standalone Symfony component

composer require symfony/console       # CLI apps
composer require symfony/process       # run sub-processes
composer require symfony/event-dispatcher
composer require symfony/validator
composer require symfony/serializer

Decision shortcut

Need	Route to
Full Laravel app	`laravel-expert` agent
Framework-agnostic HTTP messages/middleware	[[php-http-psr]]
One utility (CLI, events, validation) without a framework	Symfony component, see symfony-components.md
API-first product on Symfony	API Platform, see api-platform.md
Tiny PSR-7 API/service	Slim, see slim-framework.md
Deep Symfony full-stack MVC	No expert — flag to user (boundaries.md)

Best Practices

DO

Use this map to choose a direction, then hand off to the research agent for specifics
Prefer a single standalone component over a full framework for a narrow need
State clearly when a task falls outside any available expert

DON'T

Present version-specific API details from here as verified — they are orientation
Attempt deep Laravel or deep Symfony full-stack work under this skill
Assume Symfony HttpFoundation and PSR-7 are interchangeable