Agent eval discovery and cli

<?php
require 'examples/boot.php';

use Cognesy\Agents\Builder\AgentBuilder;
use Cognesy\Agents\Capability\Core\UseDriver;
use Cognesy\Agents\Drivers\Testing\FakeAgentDriver;
use Cognesy\Agents\Evals\AgentEval;
use Cognesy\Agents\Evals\EvalApplication;
use Cognesy\Agents\Evals\EvalConfig;
use Cognesy\Agents\Evals\EvalContext;
use Cognesy\Agents\Evals\EvalTags;
use Cognesy\Agents\Evals\LocalAgentTarget;

// A real project would commit this directory. A temporary fixture keeps the example
// self-contained while showing the exact files that `agents-eval` discovers.
$root = sys_get_temp_dir() . '/instructor-agent-eval-cli-' . getmypid() . '-' . bin2hex(random_bytes(4));
mkdir($root . '/smoke', 0777, true);
mkdir($root . '/regression', 0777, true);

file_put_contents($root . '/evals.config.php', <<<'PHP'
<?php
use Cognesy\Agents\Builder\AgentBuilder;
use Cognesy\Agents\Capability\Core\UseDriver;
use Cognesy\Agents\Drivers\Testing\FakeAgentDriver;
use Cognesy\Agents\Evals\EvalConfig;
use Cognesy\Agents\Evals\LocalAgentTarget;

return EvalConfig::default()->withTarget(LocalAgentTarget::fromFactory(
    static fn() => AgentBuilder::base()
        ->withCapability(new UseDriver(FakeAgentDriver::fromResponses('Verification is required.')))
        ->build(),
));
PHP);

file_put_contents($root . '/smoke/refund.eval.php', <<<'PHP'
<?php
use Cognesy\Agents\Evals\AgentEval;
use Cognesy\Agents\Evals\EvalContext;
use Cognesy\Agents\Evals\EvalTags;

return AgentEval::define(
    description: 'Unverified refunds require verification.',
    tags: EvalTags::of('smoke'),
    test: static function (EvalContext $t): void {
        $t->send('Refund order A1049.');
        $t->succeeded();
        $t->messageIncludes('Verification');
    },
);
PHP);

// This case is deliberately outside the smoke lane. If filtering stops working, the
// failing assertion makes the example fail instead of silently demonstrating a false pass.
file_put_contents($root . '/regression/not-selected.eval.php', <<<'PHP'
<?php
use Cognesy\Agents\Evals\AgentEval;
use Cognesy\Agents\Evals\EvalContext;
use Cognesy\Agents\Evals\EvalTags;

return AgentEval::define(
    description: 'A regression case outside the selected lane.',
    tags: EvalTags::of('regression'),
    test: static function (EvalContext $t): void {
        $t->check('must-not-run', false);
    },
);
PHP);

$removeTree = static function (string $directory): void {
    if (!str_starts_with($directory, sys_get_temp_dir() . '/instructor-agent-eval-cli-') || !is_dir($directory)) {
        return;
    }
    $iterator = new RecursiveIteratorIterator(
        new RecursiveDirectoryIterator($directory, FilesystemIterator::SKIP_DOTS),
        RecursiveIteratorIterator::CHILD_FIRST,
    );
    foreach ($iterator as $entry) {
        $entry->isDir() ? rmdir($entry->getPathname()) : unlink($entry->getPathname());
    }
    rmdir($directory);
};

try {
    $application = new EvalApplication();
    $listedOutput = '';
    $listedExit = $application->run(
        ['agents-eval', $root, '--list', '--tag=smoke'],
        stdout: static function (string $text) use (&$listedOutput): void {
            $listedOutput .= $text;
        },
    );
    $listedIds = array_values(array_filter(explode("\n", trim($listedOutput))));

    // Equivalent shell command: vendor/bin/agents-eval <path> --filter=smoke/*
    // --tag=smoke --json --skip-report.
    $jsonOutput = '';
    $runExit = $application->run(
        ['agents-eval', $root, '--filter=smoke/*', '--tag=smoke', '--json', '--skip-report'],
        stdout: static function (string $text) use (&$jsonOutput): void {
            $jsonOutput .= $text;
        },
    );
    $run = json_decode($jsonOutput, true, flags: JSON_THROW_ON_ERROR);

    if ($listedExit !== 0
        || $listedIds !== ['smoke/refund']
        || $runExit !== 0
        || $run['counts']['passed'] !== 1
        || $run['results'][0]['id'] !== 'smoke/refund'
    ) {
        throw new RuntimeException('Eval discovery, filtering, or CLI execution did not match the expected contract.');
    }

    echo "Discovered smoke lane: " . implode(', ', $listedIds) . "\n";
    echo "CLI JSON result: {$run['counts']['passed']} passed, exit {$runExit}\n";
} finally {
    $removeTree($root);
}
?>