package-compatibility

package-compatibility is a skill for Claude Code, Codex from laravel/package-skeleton. It costs 42 tokens per session (371 once invoked), scanned A, original, MIT.

A compatibility review guide for Laravel packages, which are reusable PHP components for the Laravel web framework. It checks whether code and dependencies work across the package's supported PHP, Laravel, testing, and operating-system versions.

In plain words
What is it for?
Use it to review Laravel or PHP API changes, dependency updates, Composer constraints, Testbench versions, CI test matrices, and platform-specific assumptions.
Why use it?
It helps catch changes that work locally but fail on another supported version, dependency set, or Windows environment. It also checks that dependency rules still allow the intended combinations.

Skill for Claude CodeCodex

About the project

Laravel Package Skeleton is a starter repository for creating Laravel packages, with package configuration, testing, static analysis, formatting, and a workbench application already set up. Laravel package developers use it as the starting point for new packages. The catalogue add-ons support workflows around this package template.

laravel/package-skeleton · 60 stars · on GitHub

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/laravel/package-skeleton/package-compatibility
Any agent
npx skills add laravel/package-skeleton --skill package-compatibility
Clone the repo
git clone --depth 1 https://github.com/laravel/package-skeleton

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for package-compatibility

README.md
[![agentmods](https://agentmods.dev/badge/skills/laravel/package-skeleton/package-compatibility.svg)](https://agentmods.dev/skills/laravel/package-skeleton/package-compatibility)
Your own site
<a href="https://agentmods.dev/skills/laravel/package-skeleton/package-compatibility"><img src="https://agentmods.dev/badge/skills/laravel/package-skeleton/package-compatibility.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 371 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00042 $0.00371
Opus 5 $0.00021 $0.00186
Sonnet 5 $0.00008 $0.00074
Haiku 4.5 $0.00004 $0.00037

Measured 5d ago against content hash 49221e1226f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

package-compatibility scanned grade A with 0 findings 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 5d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.agents/skills/package-compatibility/SKILL.md · 42 lines

What it actually says

Package Compatibility

Primary Goal

Keep package code, dependencies, and workflows compatible with the supported Laravel 12/13 and PHP 8.3+ matrix.

Workflow

  1. Read composer.json first to determine PHP, Laravel, and Testbench constraints.
  2. Check changed code against Laravel 12/13 APIs and PHP 8.3+ syntax before adopting newer framework or language features.
  3. Review .github/workflows/tests.yml for dependency stability lanes, prefer-lowest coverage, prefer-stable coverage, and Windows concerns.
  4. When changing dependencies, confirm constraints still allow the intended Laravel and Testbench versions.
  5. Validate with the smallest local command available, then rely on CI for full OS and dependency matrix coverage.

References

  • composer.json
  • .github/workflows/tests.yml
  • phpstan.neon.dist
  • tests/
  • workbench/

Examples

  • Review a new Laravel API call by checking whether it exists in Laravel 12 and Laravel 13 before merging it into shared package code.
  • Review a dependency bump by checking Composer constraints, Testbench constraints, prefer-lowest behavior, and Windows path assumptions.

Anti-Patterns

  • Assuming the latest local dependency version represents the whole support matrix.
  • Adding PHP syntax or Laravel APIs that exceed composer.json constraints.
  • Ignoring Windows path separators, executable assumptions, or shell-only syntax in tests and workflows.
  • Removing dependency stability lanes because they are slower than a single happy path.
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. 5d ago First seen · 42 lines · 42 tokens per session scan A 49221e1226f2

Subscribe to this mod's changes

package-compatibility is a skill published in the GitHub repository laravel/package-skeleton (60 stars, last pushed 2d ago), licensed MIT. It adds 42 tokens to every session and 371 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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