Agent eval reporters

<?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\AgentEvals;
use Cognesy\Agents\Evals\ArtifactEvalReporter;
use Cognesy\Agents\Evals\ConsoleEvalReporter;
use Cognesy\Agents\Evals\EvalConfig;
use Cognesy\Agents\Evals\EvalContext;
use Cognesy\Agents\Evals\EvalRunner;
use Cognesy\Agents\Evals\JUnitEvalReporter;
use Cognesy\Agents\Evals\LocalAgentTarget;

// Isolate this process's generated reports from other local or parallel runs.
$directory = sys_get_temp_dir() . '/instructor-agent-evals-' . getmypid();

// JUnit XML is a portable CI report format understood by many build systems. It does not
// require JUnit, PHPUnit, or Pest to execute the evals. Unlike the framework reporters in
// the next example, it writes an artifact rather than failing the currently running test.
$junit = new JUnitEvalReporter($directory . '/junit.xml');

// Native artifacts retain detailed JSON results and NDJSON event trajectories for debugging.
$artifacts = new ArtifactEvalReporter($directory . '/artifacts');

// Fan every immutable eval result out to readable console, CI, and forensic destinations.
$config = EvalConfig::default()->withReporters(
    // Inject the output writer so console rendering is usable outside a specific CLI framework.
    ConsoleEvalReporter::fromWriter(static fn(string $text) => print($text)),
    $junit,
    $artifacts,
);

// Keep the example deterministic and offline by evaluating a controlled in-process agent.
$target = LocalAgentTarget::fromFactory(static fn() => AgentBuilder::base()
    ->withCapability(new UseDriver(FakeAgentDriver::fromResponses('ok')))
    ->build());

// A minimal passing case is enough to exercise every reporter lifecycle callback.
$eval = AgentEval::define('Reports a pass', static function(EvalContext $t): void {
    $t->send('hello');
    $t->succeeded();
})->withId('reporters/pass');

// EvalRunner executes the case, then notifies each configured reporter with the same result.
$result = (new EvalRunner($target, $config))->run(new AgentEvals($eval));
$junitPath = $directory . '/junit.xml';
$summaryPath = $artifacts->runDirectory() . '/summary.json';

if ($result->exitCode()->value !== 0 || !is_file($junitPath) || !is_file($summaryPath)) {
    throw new RuntimeException('One or more eval reporters did not produce a successful result.');
}

echo "JUnit for CI: {$junitPath}\n";
echo "Debug summary: {$summaryPath}\n";
echo "Result: one eval run produced console, CI, and forensic outputs.\n";
?>