diff --git a/.arcconfig b/.arcconfig
new file mode 100644
--- /dev/null
+++ b/.arcconfig
@@ -0,0 +1,5 @@
+{
+	"repository.callsign": "KHEALTH",
+	"phabricator.uri": "https://devcentral.nasqueron.org",
+	"unit.engine": "PhpunitTestEngine"
+}
diff --git a/.arclint b/.arclint
new file mode 100644
--- /dev/null
+++ b/.arclint
@@ -0,0 +1,32 @@
+{
+  "exclude": [
+    "(^vendor/)"
+  ],
+  "linters": {
+    "chmod": {
+      "type": "chmod"
+    },
+    "filename": {
+      "type": "filename"
+    },
+    "merge-conflict": {
+      "type": "merge-conflict"
+    },
+    "php": {
+      "type": "php",
+      "include": "(\\.php$)"
+    },
+    "phpcs": {
+      "type": "phpcs",
+      "bin": "vendor/bin/phpcs",
+      "phpcs.standard": "phpcs.xml",
+      "include": [
+        "(^src/.*\\.php$)",
+        "(^tests/.*\\.php$)"
+      ]
+    },
+    "spelling": {
+      "type": "spelling"
+    }
+  }
+}
diff --git a/.gitignore b/.gitignore
new file mode 100644
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+vendor/
+composer.lock
diff --git a/bin/health b/bin/health
new file mode 100755
--- /dev/null
+++ b/bin/health
@@ -0,0 +1,46 @@
+#!/usr/bin/env php
+<?php
+
+#   -------------------------------------------------------------
+#   Health command
+#   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+#   Project:        Keruald
+#   Description:    Generate site health report
+#   License:        BSD-2-Clause
+#   -------------------------------------------------------------
+
+use Keruald\Health\CLI\HealthCommand;
+
+#   -------------------------------------------------------------
+#   Register classes autoloader
+#
+#   Sources candidates for Composer autoloader:
+#    :: Case 1 - the library itself
+#    :: Case 2 - a project importing this library ad dependency
+#
+#   Code solution from The League of Extraordinary Packages.
+#   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+function includeIfExists (string $file) : bool {
+    if (file_exists($file)) {
+        return include $file;
+    }
+}
+
+if ((!$loader = includeIfExists(__DIR__ . '/../vendor/autoload.php')) &&
+    (!$loader = includeIfExists(__DIR__ . '/../../../autoload.php'))) {
+        die(<<<EOF
+You must set up the project dependencies, run the following commands:
+$ wget http://getcomposer.org/composer.phar
+OR
+$ curl -sS https://getcomposer.org/installer | php
+$ php composer.phar install --dev
+EOF
+    );
+}
+
+#   -------------------------------------------------------------
+#   Run command
+#   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+HealthCommand::run($argc, $argv);
diff --git a/composer.json b/composer.json
new file mode 100644
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,32 @@
+{
+    "name": "keruald/health",
+    "description": "Perform health checks on a website to help detect configuration issues.",
+    "type": "library",
+    "repositories": [{
+        "type": "path",
+        "url": "/home/dereckson/dev/nasqueron/keruald/commands"
+    }, {
+        "type": "path",
+        "url": "/home/dereckson/dev/nasqueron/keruald/report"
+    }],
+    "require": {
+        "keruald/commands": "dev-master ",
+        "keruald/omnitools": "dev-main",
+        "keruald/report": "dev-main"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^9.5",
+        "phan/phan": "^5.3",
+        "nasqueron/codestyle": "^0.0.1",
+        "squizlabs/php_codesniffer": "^3.6"
+    },
+    "license": "BSD-2-Clause",
+    "autoload": {
+        "psr-4": {
+            "Keruald\\Health\\": "src/"
+        }
+    },
+    "bin": [
+        "bin/health"
+    ]
+}
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<ruleset name="Nasqueron">
+    <rule ref="vendor/nasqueron/codestyle/CodeSniffer/ruleset.xml" />
+
+    <file>src</file>
+    <file>tests</file>
+</ruleset>
diff --git a/src/CLI/HealthCommand.php b/src/CLI/HealthCommand.php
new file mode 100644
--- /dev/null
+++ b/src/CLI/HealthCommand.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Keruald\Health\CLI;
+
+use Keruald\Commands\Command;
+use Keruald\Commands\ExitCode;
+
+class HealthCommand extends Command {
+
+    public function main () : int {
+        if ($this->argc < 2) {
+            $this->usage();
+            return ExitCode::FAILURE;
+        }
+
+        $class = $this->argv[1];
+
+        if (!class_exists($class)) {
+            $this->display->error("Class not found: " . $class);
+            return ExitCode::ILLEGAL_OPTION;
+        }
+
+        return $this->printReport($class);;
+    }
+
+    public function usage () : void {
+        $usage = sprintf(
+            "Usage: %s <health report class>",
+            $this->getCommandName()
+        );
+
+        $this->display->error($usage);
+    }
+
+    private function printReport (string $class) : int {
+        $healthReport = new $class();
+        $report = $healthReport->compile();
+
+        $report->properties["Quux"] = 42;
+        echo $report->render("markdown");
+
+        return ExitCode::fromBoolean($healthReport->isHealthy);
+    }
+
+}
diff --git a/src/Check.php b/src/Check.php
new file mode 100644
--- /dev/null
+++ b/src/Check.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Keruald\Health;
+
+use Keruald\Reporting\ReportSection;
+
+abstract class Check {
+
+    ///
+    /// Properties
+    ///
+
+    public ReportSection $report;
+
+    ///
+    /// Abstract part
+    ///
+
+    public abstract function check () : bool;
+
+    ///
+    /// Common methods for all checks
+    ///
+
+    public function __construct () {
+        $this->report = new ReportSection(static::class, []);
+    }
+
+    protected function report (string $title, string $text) {
+        $this->report->push($title, $text);
+    }
+
+}
diff --git a/src/HealthReport.php b/src/HealthReport.php
new file mode 100644
--- /dev/null
+++ b/src/HealthReport.php
@@ -0,0 +1,87 @@
+<?php
+
+namespace Keruald\Health;
+
+use Keruald\OmniTools\OS\CurrentProcess;
+use Keruald\Reporting\Report;
+
+abstract class HealthReport {
+
+    ///
+    /// Properties
+    ///
+
+    /**
+     * @var bool Indicates if the site is healthy, ie each check was green.
+     */
+    public bool $isHealthy = true;
+
+    ///
+    /// Methods to implement
+    ///
+
+    /**
+     * An array with the fully qualified name of the check classes to run.
+     *
+     * Each class should extend the Check class.
+     *
+     * @return string[]
+     */
+    public abstract function getChecks () : array;
+
+    // You can also override getTitle() and getExtraProperties()
+    // to customize the report.
+
+    ///
+    /// Prepare report
+    ///
+
+    public function compile () : Report {
+        $report = new Report($this->getTitle());
+
+        foreach ($this->getChecks() as $class) {
+            $check = new $class();
+
+            $this->isHealthy &= $check->check();
+            $report->pushIfNotEmpty($check->report);
+        }
+
+        $report->properties = $this->getExtraProperties()
+                              + $this->getProperties();
+
+        return $report;
+    }
+
+    /**
+     * @return string The title of the report
+     */
+    public function getTitle () : string {
+        return "Site health";
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function getProperties() : array {
+        return [
+            'time' => time(),
+            'hostname' => gethostname(),
+            'user' => CurrentProcess::getUsername(),
+            'php_version' => phpversion(),
+            'healthy' => $this->isHealthy,
+        ];
+    }
+
+    /**
+     * A key/value hashmap of the metadata to add to the report.
+     *
+     * If the key is already defined in the default properties,
+     * the value set in getExtraProperties will be used instead.
+     *
+     * @return array<string, mixed>
+     */
+    public function getExtraProperties() : array {
+        return [];
+    }
+
+}