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Symfony Upgrade

Category: General  ·  Sub-category: orchestration-frameworks  ·  Last updated:
Symfony framework version upgrade guide using the deprecation-first approach. Use when the user asks to upgrade Symfony to a new minor or major version, fix deprecation warnings, update Symfony recipes, check bundle compatibility, migrate between LTS versions, or plan a Symfony version migration strategy. Covers PHPUnit Bridge deprecation tracking, recipe updates, bundle compatibility checks, version-specific breaking changes, and the changelog-first upgrade workflow.

From the source SKILL.md

Symfony's upgrade model is built on one core insight: a new major version is identical to the last minor version of the previous branch, minus deprecated code. Fix all deprecations first, then the major upgrade is trivial.

What this skill does

Symfony Upgrade is a community-contributed Claude Code skill in the orchestration-frameworks sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/symfony-upgrade/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user asks to upgrade Symfony to a new minor or major version, fix deprecation warnings, update Symfony recipes, check bundle compatibility, migrate between LTS versions, or plan a Symfony version migration strategy. Covers PHPUnit Bridge deprecation tracking, recipe updates, bundle compatibility checks, version-specific breaking changes, and the changelog-first upgrade workflow.

Who uses this skill

The Symfony Upgrade Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/symfony-upgrade
curl -L https://claudskills.com/skills/symfony-upgrade/SKILL.md \
  -o ~/.claude/skills/symfony-upgrade/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/symfony-upgrade/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/symfony-upgrade/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\symfony-upgrade\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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