diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index f8c7f02..925e3d4 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -31,6 +31,12 @@
       "label": "robo : upgrade",
       "problemMatcher": [],
       "type": "shell"
+    },
+    {
+      "command": "robo watch",
+      "label": "robo : watch",
+      "problemMatcher": [],
+      "type": "shell"
     }
   ]
 }
diff --git a/lib/models/PayloadCommit.php b/lib/models/PayloadCommit.php
index 31163e5..dd23126 100644
--- a/lib/models/PayloadCommit.php
+++ b/lib/models/PayloadCommit.php
@@ -13,27 +13,22 @@ class PayloadCommit implements \JsonSerializable {
   /**
    * @var PayloadUser|null The person who authored the commit.
    */
-  public $author;
+  private $author;
 
   /**
    * @var PayloadUser|null The person who committed the code.
    */
-  public $committer;
+  private $committer;
 
   /**
    * @var string The commit hash.
    */
-  public $id = '';
+  private $id;
 
   /**
    * @var string The commit message.
    */
-  public $message = '';
-
-  /**
-   * @var PayloadCommitVerification|null The GPG verification of this commit.
-   */
-  public $verification;
+  private $message;
 
   /**
    * @var \DateTime|null The commit date.
@@ -45,21 +40,65 @@ class PayloadCommit implements \JsonSerializable {
    */
   private $url;
 
+  /**
+   * @var PayloadCommitVerification|null The GPG verification of this commit.
+   */
+  private $verification;
+
+  /**
+   * Creates a new payload commit.
+   * @param string $id The commit hash.
+   * @param string $message The commit message.
+   */
+  function __construct(string $id, string $message) {
+    $this->id = $id;
+    $this->setMessage($message);
+  }
+
   /**
    * Creates a new commit from the specified JSON map.
    * @param object $map A JSON map representing a commit.
    * @return static The instance corresponding to the specified JSON map.
    */
   static function fromJson(object $map): self {
-    return new static([
-      'author' => isset($map->author) && is_object($map->author) ? PayloadUser::fromJson($map->author) : null,
-      'committer' => isset($map->committer) && is_object($map->committer) ? PayloadUser::fromJson($map->committer) : null,
-      'id' => isset($map->id) && is_string($map->id) ? $map->id : '',
-      'message' => isset($map->message) && is_string($map->message) ? $map->message : '',
-      'timestamp' => isset($map->timestamp) && is_string($map->timestamp) ? $map->timestamp : null,
-      'url' => isset($map->url) && is_string($map->url) ? $map->url : null,
-      'verification' => isset($map->verification) && is_object($map->verification) ? PayloadCommitVerification::fromJson($map->verification) : null
-    ]);
+    return (new static(isset($map->id) && is_string($map->id) ? $map->id : '', isset($map->message) && is_string($map->message) ? $map->message : ''))
+      ->setAuthor(isset($map->author) && is_object($map->author) ? PayloadUser::fromJson($map->author) : null)
+      ->setCommitter(isset($map->committer) && is_object($map->committer) ? PayloadUser::fromJson($map->committer) : null)
+      ->setTimestamp(isset($map->timestamp) && is_string($map->timestamp) ? $map->timestamp : null)
+      ->setUrl(isset($map->url) && is_string($map->url) ? $map->url : null)
+      ->setVerification(isset($map->verification) && is_object($map->verification) ? PayloadCommitVerification::fromJson($map->verification) : null);
+  }
+
+  /**
+   * Gets the person who authored the commit.
+   * @return PayloadUser|null The person who authored the commit.
+   */
+  function getAuthor(): ?PayloadUser {
+    return $this->author;
+  }
+
+  /**
+   * Gets the person who committed the code.
+   * @return PayloadUser|null The person who committed the code.
+   */
+  function getCommitter(): ?PayloadUser {
+    return $this->committer;
+  }
+
+  /**
+   * Gets the commit hash.
+   * @return string The commit hash.
+   */
+  function getId(): string {
+    return $this->id;
+  }
+
+  /**
+   * Gets the commit message.
+   * @return string The commit message.
+   */
+  function getMessage(): string {
+    return $this->message;
   }
 
   /**
@@ -78,22 +117,60 @@ class PayloadCommit implements \JsonSerializable {
     return $this->url;
   }
 
+  /**
+   * Gets the GPG verification of this commit.
+   * @return UriInterface|null The GPG verification of this commit.
+   */
+  function getVerification(): ?PayloadCommitVerification {
+    return $this->verification;
+  }
+
   /**
    * Converts this object to a map in JSON format.
    * @return \stdClass The map in JSON format corresponding to this object.
    */
   function jsonSerialize(): \stdClass {
     return (object) [
-      'author',
-      'committer',
-      'id',
-      'message',
+      'author' => ($author = $this->getAuthor()) ? $author->jsonSerialize() : null,
+      'committer' => ($committer = $this->getCommitter()) ? $committer->jsonSerialize() : null,
+      'id' => $this->getId(),
+      'message' => $this->getMessage(),
       'timestamp' => ($date = $this->getTimestamp()) ? $date->format('c') : null,
       'url' => ($url = $this->getUrl()) ? (string) $url : null,
-      'verification'
+      'verification' => ($verification = $this->getVerification()) ? $verification->jsonSerialize() : null
     ];
   }
 
+  /**
+   * Sets the person who authored the commit.
+   * @param PayloadUser|null $value The new author.
+   * @return $this This instance.
+   */
+  function setAuthor(?PayloadUser $value): self {
+    $this->author = $value;
+    return $this;
+  }
+
+  /**
+   * Sets the person who committed the code.
+   * @param PayloadUser|null $value The new committer.
+   * @return $this This instance.
+   */
+  function setCommitter(?PayloadUser $value): self {
+    $this->committer = $value;
+    return $this;
+  }
+
+  /**
+   * Sets the commit message.
+   * @param string $value The new message.
+   * @return $this This instance.
+   */
+  function setMessage(string $value): self {
+    $this->message = $value;
+    return $this;
+  }
+
   /**
    * Sets the commit date.
    * @param \DateTime|string|null $value The new commit date.
@@ -113,4 +190,14 @@ class PayloadCommit implements \JsonSerializable {
     $this->url = is_string($value) ? new Uri($value) : $value;
     return $this;
   }
+
+  /**
+   * Sets the commit message.
+   * @param PayloadCommitVerification|null $value The new message.
+   * @return $this This instance.
+   */
+  function setVerification(?PayloadCommitVerification $value): self {
+    $this->verification = $value;
+    return $this;
+  }
 }
diff --git a/lib/models/PayloadCommitVerification.php b/lib/models/PayloadCommitVerification.php
index dbfd12d..dafc079 100644
--- a/lib/models/PayloadCommitVerification.php
+++ b/lib/models/PayloadCommitVerification.php
@@ -10,22 +10,29 @@ class PayloadCommitVerification implements \JsonSerializable {
   /**
    * @var bool Value indicating whether the verification has succeeded.
    */
-  public $isVerified = false;
+  private $isVerified = false;
 
   /**
    * @var string A custom message sent with the verification request.
    */
-  public $payload = '';
+  private $payload = '';
 
   /**
    * @var string A message providing details about the verification.
    */
-  public $reason = '';
+  private $reason = '';
 
   /**
    * @var string The signing key used for the verification.
    */
-  public $signature = '';
+  private $signature = '';
+
+  /**
+   * Creates a new verification of a payload commit.
+   */
+  function __construct(bool $isVerified = false) {
+    // TODO $this->setVerified($isVerified);
+  }
 
   /**
    * Creates a new commit from the specified JSON map.
@@ -41,16 +48,48 @@ class PayloadCommitVerification implements \JsonSerializable {
     ]);
   }
 
+  /**
+   * Gets the custom message sent with the verification request.
+   * @return string The custom message sent with the verification request.
+   */
+  function getPayload(): string {
+    return $this->payload;
+  }
+
+  /**
+   * Gets the message providing details about the verification.
+   * @return string The message providing details about the verification.
+   */
+  function getReason(): string {
+    return $this->reason;
+  }
+
+  /**
+   * Gets the signing key used for the verification.
+   * @return string The signing key used for the verification.
+   */
+  function getSignature(): string {
+    return $this->signature;
+  }
+
+  /**
+   * TODO
+   * @return bool
+   */
+  function isVerified(): bool {
+    return $this->isVerified;
+  }
+
   /**
    * Converts this object to a map in JSON format.
    * @return \stdClass The map in JSON format corresponding to this object.
    */
   function jsonSerialize(): \stdClass {
     return (object) [
-      'payload',
-      'reason',
-      'signature',
-      'verified' => 'isVerified'
+      'payload' => $this->getPayload(),
+      'reason' => $this->getReason(),
+      'signature' => $this->getSignature(),
+      'verified' => $this->isVerified()
     ];
   }
 }
diff --git a/lib/models/PayloadUser.php b/lib/models/PayloadUser.php
index 2b95be3..87ad25e 100644
--- a/lib/models/PayloadUser.php
+++ b/lib/models/PayloadUser.php
@@ -5,22 +5,22 @@ namespace Gitea\Models;
 /**
  * Represents the author or committer of a commit.
  */
-class PayloadUser {
+class PayloadUser implements \JsonSerializable {
 
   /**
    * @var string The mail address.
    */
-  public $email = '';
+  private $email = '';
 
   /**
    * @var string The full name.
    */
-  public $name = '';
+  private $name = '';
 
   /**
    * @var string The name of the Gitea account.
    */
-  public $username = '';
+  private $username = '';
 
   /**
    * Creates a new user from the specified JSON map.
@@ -34,4 +34,21 @@ class PayloadUser {
       'username' => isset($map->username) && is_string($map->username) ? $map->username : ''
     ]);
   }
+
+  /**
+   * Converts this object to a map in JSON format.
+   * @return \stdClass The map in JSON format corresponding to this object.
+   */
+  function jsonSerialize(): \stdClass {
+    return (object) [
+      'after' => $this->getAfter(),
+      'before' => $this->getBefore(),
+      'compare_url' => ($url = $this->getCompareUrl()) ? (string) $url : null,
+      'commits' => array_map(function(PayloadCommit $commit) { return $commit->jsonSerialize(); }, $this->getCommits()->getArrayCopy()),
+      'pusher',
+      'ref' => $this->getRef(),
+      'repository',
+      'sender'
+    ];
+  }
 }
diff --git a/lib/models/Permission.php b/lib/models/Permission.php
index acbeeca..7480153 100644
--- a/lib/models/Permission.php
+++ b/lib/models/Permission.php
@@ -5,22 +5,32 @@ namespace Gitea\Models;
 /**
  * Represents a set of permissions.
  */
-class Permission {
+class Permission implements \JsonSerializable {
 
   /**
    * @var bool Value indicating whether administrator access is allowed.
    */
-  public $admin = false;
+  private $admin;
 
   /**
    * @var bool Value indicating whether pull is allowed.
    */
-  public $pull = false;
+  private $pull;
 
   /**
    * @var bool Value indicating whether push is allowed.
    */
-  public $push = false;
+  private $push;
+
+  /**
+   * Creates a new permission.
+   * @param bool $admin Value indicating whether administrator access is allowed.
+   * @param bool $pull Value indicating whether pull is allowed.
+   * @param bool $push Value indicating whether push is allowed.
+   */
+  function __construct(bool $admin = false, bool $pull = false, bool $push = false) {
+    $this->setAdmin($admin)->setPull($pull)->setPush($push);
+  }
 
   /**
    * Creates a new user from the specified JSON map.
@@ -28,10 +38,76 @@ class Permission {
    * @return static The instance corresponding to the specified JSON map.
    */
   static function fromJson(object $map): self {
-    return new static([
-      'admin' => isset($map->admin) && is_bool($map->admin) ? $map->admin : false,
-      'pull' => isset($map->pull) && is_bool($map->pull) ? $map->pull : false,
-      'push' => isset($map->push) && is_bool($map->push) ? $map->push : false
-    ]);
+    return new static(
+      isset($map->admin) && is_bool($map->admin) ? $map->admin : false,
+      isset($map->pull) && is_bool($map->pull) ? $map->pull : false,
+      isset($map->push) && is_bool($map->push) ? $map->push : false
+    );
+  }
+
+  /**
+   * Gets a value indicating whether administrator access is allowed.
+   * @return bool `true` if administrator access is allowed, otherwise `false`.
+   */
+  function getAdmin(): bool {
+    return $this->admin;
+  }
+
+  /**
+   * Gets a value indicating whether pull is allowed.
+   * @return bool `true` if pull is allowed, otherwise `false`.
+   */
+  function getPull(): bool {
+    return $this->pull;
+  }
+
+  /**
+   * Gets a value indicating whether push is allowed.
+   * @return bool `true` if push is allowed, otherwise `false`.
+   */
+  function getPush(): bool {
+    return $this->push;
+  }
+
+  /**
+   * Converts this object to a map in JSON format.
+   * @return \stdClass The map in JSON format corresponding to this object.
+   */
+  function jsonSerialize(): \stdClass {
+    return (object) [
+      'admin' => $this->getAdmin(),
+      'pull' => $this->getPull(),
+      'push' => $this->getPush()
+    ];
+  }
+
+  /**
+   * Sets a value indicating whether administrator access is allowed.
+   * @param bool $value `true` to allow administrator access, otherwise `false`.
+   * @return $this This instance.
+   */
+  function setAdmin(bool $value): self {
+    $this->admin = $value;
+    return $this;
+  }
+
+  /**
+   * Sets a value indicating whether pull is allowed.
+   * @param bool $value `true` to allow pull, otherwise `false`.
+   * @return $this This instance.
+   */
+  function setPull(bool $value): self {
+    $this->pull = $value;
+    return $this;
+  }
+
+  /**
+   * Sets a value indicating whether push is allowed.
+   * @param bool $value `true` to allow push, otherwise `false`.
+   * @return $this This instance.
+   */
+  function setPush(bool $value): self {
+    $this->push = $value;
+    return $this;
   }
 }
diff --git a/lib/models/Repository.php b/lib/models/Repository.php
index 2dabc73..d50bc2f 100644
--- a/lib/models/Repository.php
+++ b/lib/models/Repository.php
@@ -13,87 +13,87 @@ class Repository implements \JsonSerializable {
   /**
    * @var string The name of the default branch.
    */
-  public $defaultBranch = '';
+  private $defaultBranch = '';
 
   /**
    * @var string The repository description.
    */
-  public $description = '';
+  private $description = '';
 
   /**
    * @var int The number of forks of this repository.
    */
-  public $forksCount = 0;
+  private $forksCount = 0;
 
   /**
    * @var string The full name.
    */
-  public $fullName = '';
+  private $fullName = '';
 
   /**
    * @var int The repository identifier.
    */
-  public $id = -1;
+  private $id = -1;
 
   /**
    * @var bool Value indicating whether this repository is empty.
    */
-  public $isEmpty = false;
+  private $isEmpty = false;
 
   /**
    * @var bool Value indicating whether this repository is a fork.
    */
-  public $isFork = false;
+  private $isFork = false;
 
   /**
    * @var bool Value indicating whether this repository is a mirror.
    */
-  public $isMirror = false;
+  private $isMirror = false;
 
   /**
    * @var bool Value indicating whether this repository is private.
    */
-  public $isPrivate = false;
+  private $isPrivate = false;
 
   /**
    * @var string The repository name.
    */
-  public $name = '';
+  private $name = '';
 
   /**
    * @var int The number of open issues of this repository.
    */
-  public $openIssuesCount = 0;
+  private $openIssuesCount = 0;
 
   /**
    * @var User|null The repository owner.
    */
-  public $owner;
+  private $owner;
 
   /**
    * @var Repository|null The parent repository, if this repository is a fork or a mirror.
    */
-  public $parent;
+  private $parent;
 
   /**
    * @var Permission|null The repository permissions.
    */
-  public $permissions;
+  private $permissions;
 
   /**
    * @var int The repository size, in kilobytes.
    */
-  public $size = 0;
+  private $size = 0;
 
   /**
    * @var int The number of stars of this repository.
    */
-  public $starsCount = 0;
+  private $starsCount = 0;
 
   /**
    * @var int The number of watchers of this repository.
    */
-  public $watchersCount = 0;
+  private $watchersCount = 0;
 
   /**
    * @var UriInterface|null The HTTP-based URL for cloning this repository.
diff --git a/lib/models/ServerVersion.php b/lib/models/ServerVersion.php
index f387723..3e2b660 100644
--- a/lib/models/ServerVersion.php
+++ b/lib/models/ServerVersion.php
@@ -5,12 +5,20 @@ namespace Gitea\Models;
 /**
  * Warps the version of the Gitea server.
  */
-class ServerVersion {
+class ServerVersion implements \JsonSerializable {
 
   /**
    * @var string The version number.
    */
-  public $version = '';
+  private $version;
+
+  /**
+   * Creates a new server version.
+   * @param string $version The version number.
+   */
+  function __construct(string $version) {
+    $this->version = $version;
+  }
 
   /**
    * Creates a new server version from the specified JSON map.
@@ -18,8 +26,22 @@ class ServerVersion {
    * @return static The instance corresponding to the specified JSON map.
    */
   static function fromJson(object $map): self {
-    return new static([
-      'version' => isset($map->version) && is_string($map->version) ? $map->version : ''
-    ]);
+    return new static(isset($map->version) && is_string($map->version) ? $map->version : '');
+  }
+
+  /**
+   * Gets the version number.
+   * @return string The version number.
+   */
+  function getVersion(): string {
+    return $this->version;
+  }
+
+  /**
+   * Converts this object to a map in JSON format.
+   * @return \stdClass The map in JSON format corresponding to this object.
+   */
+  function jsonSerialize(): \stdClass {
+    return (object) ['version' => $this->getVersion()];
   }
 }
diff --git a/lib/models/Team.php b/lib/models/Team.php
index 5720a85..09dfe29 100644
--- a/lib/models/Team.php
+++ b/lib/models/Team.php
@@ -5,27 +5,37 @@ namespace Gitea\Models;
 /**
  * Represents a team in an organization.
  */
-class Team {
+class Team implements \JsonSerializable {
 
   /**
    * @var string The team description.
    */
-  public $description = '';
+  private $description = '';
 
   /**
    * @var int The team identifier.
    */
-  public $id = -1;
+  private $id;
 
   /**
    * @var string The team name.
    */
-  public $name = '';
+  private $name;
 
   /**
    * @var string The team permission.
    */
-  public $permission = TeamPermission::NONE;
+  private $permission = TeamPermission::NONE;
+
+  /**
+   * Creates a new team.
+   * @param int $id The team identifier.
+   * @param string $name The team name.
+   */
+  function __construct(int $id, string $name = '') {
+    $this->id = $id;
+    $this->setName($name);
+  }
 
   /**
    * Creates a new user from the specified JSON map.
@@ -33,11 +43,83 @@ class Team {
    * @return static The instance corresponding to the specified JSON map.
    */
   static function fromJson(object $map): self {
-    return new static([
-      'description' => isset($map->description) && is_string($map->description) ? $map->description : '',
-      'id' => isset($map->id) && is_int($map->id) ? $map->id : -1,
-      'name' => isset($map->name) && is_string($map->name) ? $map->name : '',
-      'permission' => isset($map->permission) && TeamPermission::isDefined($map->permission) ? $map->permission : TeamPermission::NONE
-    ]);
+    return (new static(isset($map->id) && is_int($map->id) ? $map->id : -1, isset($map->name) && is_string($map->name) ? $map->name : ''))
+      ->setDescription(isset($map->description) && is_string($map->description) ? $map->description : '')
+      ->setPermission(isset($map->permission) && is_string($map->permission) ? $map->permission : TeamPermission::NONE);
+  }
+
+  /**
+   * Gets the team description.
+   * @return string The team description.
+   */
+  function getDescription(): string {
+    return $this->description;
+  }
+
+  /**
+   * Gets the team identifier.
+   * @return int The team identifier.
+   */
+  function getId(): int {
+    return $this->id;
+  }
+
+  /**
+   * Gets the team name.
+   * @return string The team name.
+   */
+  function getName(): string {
+    return $this->name;
+  }
+
+  /**
+   * Gets the team permission.
+   * @return string The team permission.
+   */
+  function getPermission(): string {
+    return $this->permission;
+  }
+
+  /**
+   * Converts this object to a map in JSON format.
+   * @return \stdClass The map in JSON format corresponding to this object.
+   */
+  function jsonSerialize(): \stdClass {
+    return (object) [
+      'description' => $this->getDescription(),
+      'id' => $this->getId(),
+      'name' => $this->getName(),
+      'permission' => $this->getPermission()
+    ];
+  }
+
+  /**
+   * Sets the team description.
+   * @param string $value The new description.
+   * @return $this This instance.
+   */
+  function setDescription(string $value): self {
+    $this->description = $value;
+    return $this;
+  }
+
+  /**
+   * Sets the team name.
+   * @param string $value The new name.
+   * @return $this This instance.
+   */
+  function setName(string $value): self {
+    $this->name = $value;
+    return $this;
+  }
+
+  /**
+   * Sets the team permission.
+   * @param string $value The new permission.
+   * @return $this This instance.
+   */
+  function setPermission(string $value): self {
+    $this->permission = TeamPermission::isDefined($value) ? $value : TeamPermission::NONE;
+    return $this;
   }
 }
diff --git a/lib/models/User.php b/lib/models/User.php
index ee469ac..bb610f1 100644
--- a/lib/models/User.php
+++ b/lib/models/User.php
@@ -28,7 +28,7 @@ class User implements \JsonSerializable {
   /**
    * @var int The user identifier.
    */
-  private $id = -1;
+  private $id;
 
   /**
    * @var string The user locale.
@@ -38,7 +38,17 @@ class User implements \JsonSerializable {
   /**
    * @var string The name of the Gitea account.
    */
-  private $login = '';
+  private $login;
+
+  /**
+   * Creates a new user.
+   * @param int $id The user identifier.
+   * @param string $login The name of the Gitea account.
+   */
+  function __construct(int $id, string $login) {
+    $this->id = $id;
+    $this->setLogin($login);
+  }
 
   /**
    * Creates a new user from the specified JSON map.
@@ -46,14 +56,11 @@ class User implements \JsonSerializable {
    * @return static The instance corresponding to the specified JSON map.
    */
   static function fromJson(object $map): self {
-    return new static([
-      'avatarUrl' => isset($map->avatar_url) && is_string($map->avatar_url) ? $map->avatar_url : null,
-      'email' => isset($map->email) && is_string($map->email) ? mb_strtolower($map->email) : '',
-      'fullName' => isset($map->full_name) && is_string($map->full_name) ? $map->full_name : '',
-      'id' => isset($map->id) && is_int($map->id) ? $map->id : -1,
-      'language' => isset($map->language) && is_string($map->language) ? $map->language : '',
-      'login' => isset($map->login) && is_string($map->login) ? $map->login : ''
-    ]);
+    return (new static(isset($map->id) && is_int($map->id) ? $map->id : -1, isset($map->login) && is_string($map->login) ? $map->login : ''))
+      ->setAvatarUrl(isset($map->avatar_url) && is_string($map->avatar_url) ? $map->avatar_url : null)
+      ->setEmail(isset($map->email) && is_string($map->email) ? mb_strtolower($map->email) : '')
+      ->setFullName(isset($map->full_name) && is_string($map->full_name) ? $map->full_name : '')
+      ->setLanguage(isset($map->language) && is_string($map->language) ? $map->language : '');
   }
 
   /**
@@ -149,16 +156,6 @@ class User implements \JsonSerializable {
     return $this;
   }
 
-  /**
-   * Sets the user identifier.
-   * @param int $value The new user identifier.
-   * @return $this This instance.
-   */
-  function setId(int $value): self {
-    $this->id = $value;
-    return $this;
-  }
-
   /**
    * Sets the user locale.
    * @param string $value The new user locale.