A set of Composer guidelines for managing PHP dependencies. Composer is PHP's tool for declaring, installing, autoloading, and updating project packages.

Use it when adding or removing Composer packages, configuring autoloading, setting Composer options, or creating dependency-related scripts.

It keeps dependency configuration, class loading, scripts, and package versions consistent and maintainable.

4-composer — Cursor rule for Cursor by cmnemoi/cursor-rules

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.

Clone the repo

git clone --depth 1 https://github.com/cmnemoi/cursor-rules

Made for: Cursor.

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.

README.md

[![agentmods](https://agentmods.dev/badge/rules/cmnemoi/cursor-rules/4-composer/github.svg)](https://agentmods.dev/rules/cmnemoi/cursor-rules/4-composer)

Your own site

<a href="https://agentmods.dev/rules/cmnemoi/cursor-rules/4-composer"><img src="https://agentmods.dev/badge/rules/cmnemoi/cursor-rules/4-composer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/rules/cmnemoi/cursor-rules/4-composer"><img src="https://agentmods.dev/badge/rules/cmnemoi/cursor-rules/4-composer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Nothing until a file matches its globs; then the whole rule loads.

When invoked 287 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.00287
Opus 5.5	$0.00000	$0.00115
Sonnet 5.5	$0.00000	$0.00057
Haiku 4.5	$0.00000	$0.00029

Measured 1mo ago against content hash 2798a1c3a36f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

4-composer 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 1mo 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.

general-rules/.cursor/rules/04-tools-and-configurations/4-composer.mdc · 35 lines

What it actually says

Package Management:

Use composer require for adding new dependencies
Use composer remove for removing dependencies
Specify exact version constraints for critical dependencies
Add extensions with ext-* prefix in require section
Group packages by purpose in require/require-dev sections

Dependency Configuration:

Set optimize-autoloader: true for production
Configure preferred-install as dist for faster installs
Enable sort-packages: true for consistent ordering
Explicitly configure plugin permissions in allow-plugins
Replace polyfills with replace section when using newer PHP

Autoloading:

Follow PSR-4 standard for namespace autoloading
Use classmap only for legacy code without namespaces
Define separate autoloading for tests in autoload-dev
Keep namespace structure matching directory structure

Scripts:

Create custom scripts for repetitive tasks
Group related commands with script arrays
Use @ notation to reference other scripts
Create namespaced scripts for domain-specific operations
Define post-install/update hooks for automatic setup
Add test scripts for specific modules/components
Create linting scripts that run all code quality tools

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.

1mo ago First seen · 35 lines · 0 tokens per session scan A 2798a1c3a36f

Subscribe to this mod's changes

4-composer is a cursor rule published in the GitHub repository cmnemoi/cursor-rules (2 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 287 tokens. 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 2026-08-31.

Languages PHP

4-composer

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other cursor rules, from other repositories

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