ergebnis/agent-detector

Provides a detector for detecting the presence of an agent.

1.0.1 2026-04-09 08:03 UTC

Requires

• php: ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0

Requires (Dev)

• ergebnis/composer-normalize: ^2.50.0
• ergebnis/license: ^2.7.0
• ergebnis/php-cs-fixer-config: ^6.60.2
• ergebnis/phpstan-rules: ^2.13.1
• ergebnis/phpunit-slow-test-detector: ^2.24.0
• ergebnis/rector-rules: ^1.16.0
• fakerphp/faker: ^1.24.1
• infection/infection: ^0.26.6
• phpstan/extension-installer: ^1.4.3
• phpstan/phpstan: ^2.1.46
• phpstan/phpstan-deprecation-rules: ^2.0.4
• phpstan/phpstan-phpunit: ^2.0.16
• phpstan/phpstan-strict-rules: ^2.0.10
• phpunit/phpunit: ^9.6.34
• rector/rector: ^2.4.1

MIT

• Andreas Möller

README

This project provides a composer package with a detector for detecting the presence of an agent.

Installation

Run

composer require ergebnis/agent-detector

Usage

Detecting the presence of an agent

<?php

declare(strict_types=1);

use Ergebnis\AgentDetector;

$detector = new AgentDetector\Detector();

$isAgentPresent = $detector->isAgentPresent(\getenv());

Supported agents

This package detects the presence of the following agents via environment variables:

Agent	Environment Variable
Amp	AMP_CURRENT_THREAD_ID
Antigravity	ANTIGRAVITY_AGENT
Augment	AUGMENT_AGENT
Claude Code	CLAUDECODE, CLAUDE_CODE, CLAUDE_CODE_IS_COWORK
Codex	CODEX_CI, CODEX_SANDBOX, CODEX_THREAD_ID
Cursor	CURSOR_AGENT, CURSOR_TRACE_ID
Gemini CLI	GEMINI_CLI
GitHub Copilot	COPILOT_ALLOW_ALL, COPILOT_GITHUB_TOKEN, COPILOT_MODEL
OpenCode	OPENCODE, OPENCODE_CLIENT
Replit	REPL_ID

Indicating the presence of an agent

In addition, the generic AI_AGENT environment variable can be set to indicate the presence of an agent.

Changelog

The maintainers of this project record notable changes to this project in a changelog.

Contributing

The maintainers of this project suggest following the contribution guide.

Code of Conduct

The maintainers of this project ask contributors to follow the code of conduct.

General Support Policy

The maintainers of this project provide limited support.

PHP Version Support Policy

This project supports PHP versions with active and security support.

The maintainers of this project add support for a PHP version following its initial release and drop support for a PHP version when it has reached the end of security support.

Security Policy

This project has a security policy.

License

This project uses the MIT license.

Credits

The agent detector is inspired by shipfastlabs/agent-detector, originally licensed under MIT by Pushpak Chhajed.

Social

Follow @localheinz and @ergebnis on Twitter.