chore(core): add apiguardian @API annotations (#368)

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Core: Add delegating command execution handlers ([#363](https://github.com/Incendo/cloud/pull/363))
 - Core: Add `builder()` getter to `Command.Builder` ([#363](https://github.com/Incendo/cloud/pull/363))
 - Core: Add flag yielding modes to `StringArgument` and `StringArrayArgument` ([#367](https://github.com/Incendo/cloud/pull/367))
+- Core: Add [apiguardian](https://github.com/apiguardian-team/apiguardian) `@API` annotations ([#368](https://github.com/Incendo/cloud/pull/368))
 - Annotations: Annotation string processors ([#353](https://github.com/Incendo/cloud/pull/353))
 - Annotations: `@CommandContainer` annotation processing ([#364](https://github.com/Incendo/cloud/pull/364))
 - Annotations: `@CommandMethod` annotation processing for compile-time validation ([#365](https://github.com/Incendo/cloud/pull/365))

build-logic/src/main/kotlin/cloud.base-conventions.gradle.kts

@@ -110,6 +110,8 @@ repositories {
 
 dependencies {
     compileOnlyApi(libs.checkerQual)
+    compileOnlyApi(libs.apiguardian)
+
     testImplementation(libs.jupiterEngine)
     testImplementation(libs.jupiterParams)
     testImplementation(libs.mockitoCore)

cloud-core/src/main/java/cloud/commandframework/ArgumentDescription.java

@@ -24,6 +24,7 @@
 package cloud.commandframework;
 
 import cloud.commandframework.arguments.CommandArgument;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 import static java.util.Objects.requireNonNull;
@@ -33,6 +34,7 @@ import static java.util.Objects.requireNonNull;
  *
  * @since 1.4.0
  */
+@API(status = API.Status.STABLE, since = "1.4.0")
 public interface ArgumentDescription {
 
     /**

cloud-core/src/main/java/cloud/commandframework/Command.java

@@ -48,6 +48,7 @@ import java.util.Optional;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
 import java.util.stream.Collectors;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -56,6 +57,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public class Command<C> {
 
     private final List<@NonNull CommandComponent<C>> components;
@@ -75,6 +77,7 @@ public class Command<C> {
      * @param commandMeta             Command meta instance
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public Command(
             final @NonNull List<@NonNull CommandComponent<C>> commandComponents,
             final @NonNull CommandExecutionHandler<@NonNull C> commandExecutionHandler,
@@ -118,6 +121,7 @@ public class Command<C> {
      * @param commandMeta             Command meta instance
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public Command(
             final @NonNull List<@NonNull CommandComponent<C>> commandComponents,
             final @NonNull CommandExecutionHandler<@NonNull C> commandExecutionHandler,
@@ -136,6 +140,7 @@ public class Command<C> {
      * @param commandMeta             Command meta instance
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public Command(
             final @NonNull List<@NonNull CommandComponent<C>> commandComponents,
             final @NonNull CommandExecutionHandler<@NonNull C> commandExecutionHandler,
@@ -157,6 +162,7 @@ public class Command<C> {
      * @see #Command(List, CommandExecutionHandler, Class, CommandPermission, CommandMeta)
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED)
     public Command(
             final @NonNull Map<@NonNull CommandArgument<C, ?>, @NonNull Description> commandArguments,
             final @NonNull CommandExecutionHandler<@NonNull C> commandExecutionHandler,
@@ -178,6 +184,7 @@ public class Command<C> {
      * @see #Command(List, CommandExecutionHandler, Class, CommandMeta)
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED)
     public Command(
             final @NonNull Map<@NonNull CommandArgument<C, ?>, @NonNull Description> commandArguments,
             final @NonNull CommandExecutionHandler<@NonNull C> commandExecutionHandler,
@@ -198,6 +205,7 @@ public class Command<C> {
      * @see #Command(List, CommandExecutionHandler, CommandPermission, CommandMeta)
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED)
     public Command(
             final @NonNull Map<@NonNull CommandArgument<C, ?>, @NonNull Description> commandArguments,
             final @NonNull CommandExecutionHandler<@NonNull C> commandExecutionHandler,
@@ -231,6 +239,7 @@ public class Command<C> {
      * @deprecated for removal since 1.4.0. Use {@link #newBuilder(String, CommandMeta, ArgumentDescription, String...)} instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.4.0")
     public static <C> @NonNull Builder<C> newBuilder(
             final @NonNull String commandName,
             final @NonNull CommandMeta commandMeta,
@@ -252,6 +261,7 @@ public class Command<C> {
      * @return Command builder
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public static <C> @NonNull Builder<C> newBuilder(
             final @NonNull String commandName,
             final @NonNull CommandMeta commandMeta,
@@ -314,6 +324,7 @@ public class Command<C> {
      * @return Copy of the command component array. This List is mutable
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public @NonNull List<CommandComponent<@NonNull C>> getComponents() {
         return new ArrayList<>(this.components);
     }
@@ -364,6 +375,7 @@ public class Command<C> {
      *             Use {@link #getArguments()} and search in that, instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED)
     public @NonNull String getArgumentDescription(final @NonNull CommandArgument<C, ?> argument) {
         for (final CommandComponent<C> component : this.components) {
             if (component.getArgument().equals(argument)) {
@@ -384,7 +396,7 @@ public class Command<C> {
     }
 
     /**
-     * Check whether or not the command is hidden
+     * Check whether the command is hidden
      *
      * @return {@code true} if the command is hidden, {@code false} if not
      */
@@ -399,6 +411,7 @@ public class Command<C> {
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> {
 
         private final CommandMeta commandMeta;
@@ -435,6 +448,7 @@ public class Command<C> {
          * @return required sender type
          * @since 1.3.0
          */
+        @API(status = API.Status.STABLE, since = "1.3.0")
         public @Nullable Class<? extends C> senderType() {
             return this.senderType;
         }
@@ -447,6 +461,7 @@ public class Command<C> {
          * @return required permission
          * @since 1.3.0
          */
+        @API(status = API.Status.STABLE, since = "1.3.0")
         public @NonNull CommandPermission commandPermission() {
             return this.commandPermission;
         }
@@ -460,6 +475,7 @@ public class Command<C> {
          * @deprecated for removal since 1.2.0, use the typesafe variant at {@link #meta(CommandMeta.Key, Object)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.2.0")
         public @NonNull Builder<C> meta(final @NonNull String key, final @NonNull String value) {
             final CommandMeta commandMeta = SimpleCommandMeta.builder().with(this.commandMeta).with(key, value).build();
             return new Builder<>(
@@ -482,6 +498,7 @@ public class Command<C> {
          * @return New builder instance using the inserted meta key-value pair
          * @since 1.3.0
          */
+        @API(status = API.Status.STABLE, since = "1.3.0")
         public <V> @NonNull Builder<C> meta(final CommandMeta.@NonNull Key<V> key, final @NonNull V value) {
             final CommandMeta commandMeta = SimpleCommandMeta.builder().with(this.commandMeta).with(key, value).build();
             return new Builder<>(
@@ -539,6 +556,7 @@ public class Command<C> {
          * @deprecated for removal since 1.4.0. Use {@link #literal(String, ArgumentDescription, String...)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public @NonNull Builder<C> literal(
                 final @NonNull String main,
                 final @NonNull Description description,
@@ -556,6 +574,7 @@ public class Command<C> {
          * @return New builder instance with the modified command chain
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public @NonNull Builder<C> literal(
                 final @NonNull String main,
                 final @NonNull ArgumentDescription description,
@@ -597,6 +616,7 @@ public class Command<C> {
          * @deprecated for removal since 1.4.0. Use {@link #argument(CommandArgument, ArgumentDescription)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public <T> @NonNull Builder<C> argument(
                 final @NonNull CommandArgument<C, T> argument,
                 final @NonNull Description description
@@ -613,6 +633,7 @@ public class Command<C> {
          * @return New builder instance with the command argument inserted into the argument list
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public <T> @NonNull Builder<C> argument(
                 final @NonNull CommandArgument<C, T> argument,
                 final @NonNull ArgumentDescription description
@@ -646,6 +667,7 @@ public class Command<C> {
          * @deprecated for removal since 1.4.0. Use {@link #argument(CommandArgument.Builder, ArgumentDescription)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public <T> @NonNull Builder<C> argument(
                 final CommandArgument.@NonNull Builder<C, T> builder,
                 final @NonNull Description description
@@ -663,6 +685,7 @@ public class Command<C> {
          * @return New builder instance with the command argument inserted into the argument list
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public <T> @NonNull Builder<C> argument(
                 final CommandArgument.@NonNull Builder<C, T> builder,
                 final @NonNull ArgumentDescription description
@@ -723,6 +746,7 @@ public class Command<C> {
          * @deprecated for removal since 1.4.0. Use {@link #argumentPair(String, Pair, Pair, ArgumentDescription)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public <U, V> @NonNull Builder<C> argumentPair(
                 final @NonNull String name,
                 final @NonNull Pair<@NonNull String, @NonNull String> names,
@@ -750,6 +774,7 @@ public class Command<C> {
          * @return Builder instance with the argument inserted
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public <U, V> @NonNull Builder<C> argumentPair(
                 final @NonNull String name,
                 final @NonNull Pair<@NonNull String, @NonNull String> names,
@@ -785,6 +810,7 @@ public class Command<C> {
          *     {@link #argumentPair(String, TypeToken, Pair, Pair, BiFunction, ArgumentDescription)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public <U, V, O> @NonNull Builder<C> argumentPair(
                 final @NonNull String name,
                 final @NonNull TypeToken<O> outputType,
@@ -817,6 +843,7 @@ public class Command<C> {
          * @return Builder instance with the argument inserted
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public <U, V, O> @NonNull Builder<C> argumentPair(
                 final @NonNull String name,
                 final @NonNull TypeToken<O> outputType,
@@ -855,6 +882,7 @@ public class Command<C> {
          *     instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public <U, V, W> @NonNull Builder<C> argumentTriplet(
                 final @NonNull String name,
                 final @NonNull Triplet<String, String, String> names,
@@ -883,6 +911,7 @@ public class Command<C> {
          * @return Builder instance with the argument inserted
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public <U, V, W> @NonNull Builder<C> argumentTriplet(
                 final @NonNull String name,
                 final @NonNull Triplet<String, String, String> names,
@@ -919,6 +948,7 @@ public class Command<C> {
          *      {@link #argumentTriplet(String, TypeToken, Triplet, Triplet, BiFunction, ArgumentDescription)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public <U, V, W, O> @NonNull Builder<C> argumentTriplet(
                 final @NonNull String name,
                 final @NonNull TypeToken<O> outputType,
@@ -959,6 +989,7 @@ public class Command<C> {
          * @return Builder instance with the argument inserted
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public <U, V, W, O> @NonNull Builder<C> argumentTriplet(
                 final @NonNull String name,
                 final @NonNull TypeToken<O> outputType,
@@ -1002,6 +1033,7 @@ public class Command<C> {
          * @return the current handler
          * @since 1.7.0
          */
+        @API(status = API.Status.STABLE, since = "1.7.0")
         public @NonNull CommandExecutionHandler<C> handler() {
             return this.commandExecutionHandler;
         }

cloud-core/src/main/java/cloud/commandframework/CommandComponent.java

@@ -25,6 +25,7 @@ package cloud.commandframework;
 
 import cloud.commandframework.arguments.CommandArgument;
 import java.util.Objects;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -33,6 +34,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @param <C> Command sender type
  * @since 1.3.0
  */
+@API(status = API.Status.STABLE, since = "1.3.0")
 public final class CommandComponent<C> {
 
     private final CommandArgument<C, ?> argument;
@@ -68,6 +70,7 @@ public final class CommandComponent<C> {
      * @deprecated for removal since 1.4.0. Use {@link #getArgumentDescription()} instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.4.0")
     public @NonNull Description getDescription() {
         if (this.description instanceof Description) {
             return (Description) this.description;
@@ -82,6 +85,7 @@ public final class CommandComponent<C> {
      * @return command component description
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public @NonNull ArgumentDescription getArgumentDescription() {
         return this.description;
     }
@@ -120,6 +124,7 @@ public final class CommandComponent<C> {
      * @deprecated for removal since 1.4.0. Use {@link #of(CommandArgument, ArgumentDescription)} instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.4.0")
     public static <C> @NonNull CommandComponent<C> of(
             final @NonNull CommandArgument<C, ?> commandArgument,
             final @NonNull Description commandDescription

cloud-core/src/main/java/cloud/commandframework/CommandHelpHandler.java

@@ -36,9 +36,11 @@ import java.util.Locale;
 import java.util.Objects;
 import java.util.Set;
 import java.util.function.Predicate;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+@API(status = API.Status.STABLE)
 public final class CommandHelpHandler<C> {
 
     private final CommandManager<C> commandManager;
@@ -289,6 +291,7 @@ public final class CommandHelpHandler<C> {
         return false;
     }
 
+
     /**
      * Something that can be returned as the result of a help query
      * <p>
@@ -301,10 +304,13 @@ public final class CommandHelpHandler<C> {
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.STABLE)
     public interface HelpTopic<C> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class VerboseHelpEntry<C> {
 
         private final Command<C> command;
@@ -378,11 +384,13 @@ public final class CommandHelpHandler<C> {
 
     }
 
+
     /**
      * Index of available commands
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.STABLE)
     public static final class IndexHelpTopic<C> implements HelpTopic<C> {
 
         private final List<VerboseHelpEntry<C>> entries;
@@ -441,6 +449,7 @@ public final class CommandHelpHandler<C> {
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.STABLE)
     public static final class VerboseHelpTopic<C> implements HelpTopic<C> {
 
         private final Command<C> command;
@@ -503,6 +512,7 @@ public final class CommandHelpHandler<C> {
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.STABLE)
     public static final class MultiHelpTopic<C> implements HelpTopic<C> {
 
         private final String longestPath;

cloud-core/src/main/java/cloud/commandframework/CommandManager.java

@@ -75,6 +75,7 @@ import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.BiConsumer;
 import java.util.function.Function;
 import java.util.function.Predicate;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
@@ -84,6 +85,7 @@ import org.checkerframework.common.returnsreceiver.qual.This;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public abstract class CommandManager<C> {
 
     private final Map<Class<? extends Exception>, BiConsumer<C, ? extends Exception>> exceptionHandlers = new HashMap<>();
@@ -250,6 +252,7 @@ public abstract class CommandManager<C> {
      * @return the caption variable replacement handler
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public @NonNull CaptionVariableReplacementHandler captionVariableReplacementHandler() {
         return this.captionVariableReplacementHandler;
     }
@@ -260,6 +263,7 @@ public abstract class CommandManager<C> {
      * @param captionVariableReplacementHandler new replacement handler
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public void captionVariableReplacementHandler(
             final @NonNull CaptionVariableReplacementHandler captionVariableReplacementHandler
     ) {
@@ -363,6 +367,7 @@ public abstract class CommandManager<C> {
      * @deprecated Use {@link #setCaptionRegistry(CaptionRegistry)} These methods are identical.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED)
     public final void registerDefaultCaptions(final @NonNull CaptionRegistry<C> captionRegistry) {
         this.captionRegistry = captionRegistry;
     }
@@ -392,9 +397,11 @@ public abstract class CommandManager<C> {
      * @param description Description for the root literal
      * @param meta        Command meta
      * @return Builder instance
-     * @deprecated for removal since 1.4.0. Use {@link #commandBuilder(String, Collection, Description, CommandMeta)} instead.
+     * @deprecated for removal since 1.4.0. Use
+     *         {@link #commandBuilder(String, Collection, ArgumentDescription, CommandMeta)} instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.4.0")
     public Command.@NonNull Builder<C> commandBuilder(
             final @NonNull String name,
             final @NonNull Collection<String> aliases,
@@ -421,6 +428,7 @@ public abstract class CommandManager<C> {
      * @return Builder instance
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public Command.@NonNull Builder<C> commandBuilder(
             final @NonNull String name,
             final @NonNull Collection<String> aliases,
@@ -484,6 +492,7 @@ public abstract class CommandManager<C> {
      *         instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.4.0")
     public Command.@NonNull Builder<C> commandBuilder(
             final @NonNull String name,
             final @NonNull CommandMeta meta,
@@ -510,6 +519,7 @@ public abstract class CommandManager<C> {
      * @return Builder instance
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public Command.@NonNull Builder<C> commandBuilder(
             final @NonNull String name,
             final @NonNull CommandMeta meta,
@@ -575,6 +585,7 @@ public abstract class CommandManager<C> {
      * @deprecated for removal since 1.4.0. Use {@link #commandBuilder(String, ArgumentDescription, String...)} instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.4.0")
     public Command.@NonNull Builder<C> commandBuilder(
             final @NonNull String name,
             final @NonNull Description description,
@@ -603,6 +614,7 @@ public abstract class CommandManager<C> {
      * @see #createDefaultCommandMeta() Default command meta creation
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public Command.@NonNull Builder<C> commandBuilder(
             final @NonNull String name,
             final @NonNull ArgumentDescription description,
@@ -943,6 +955,7 @@ public abstract class CommandManager<C> {
      * @return Command execution coordinator
      * @since 1.6.0
      */
+    @API(status = API.Status.STABLE, since = "1.6.0")
     public @NonNull CommandExecutionCoordinator<C> commandExecutionCoordinator() {
         return this.commandExecutionCoordinator;
     }
@@ -955,6 +968,7 @@ public abstract class CommandManager<C> {
      * @throws IllegalStateException if the manager is in any state but {@code in} or {@code out}
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     protected final void transitionOrThrow(final @NonNull RegistrationState in, final @NonNull RegistrationState out) {
         if (!this.transitionIfPossible(in, out)) {
             throw new IllegalStateException("Command manager was in state " + this.state.get() + ", while we were expecting a state "
@@ -970,6 +984,7 @@ public abstract class CommandManager<C> {
      * @return {@code true} if the state transition was successful, or the manager was already in the desired state
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     protected final boolean transitionIfPossible(final @NonNull RegistrationState in, final @NonNull RegistrationState out) {
         return this.state.compareAndSet(in, out) || this.state.get() == out;
     }
@@ -981,6 +996,7 @@ public abstract class CommandManager<C> {
      * @throws IllegalStateException if the manager is not in the expected state
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     protected final void requireState(final @NonNull RegistrationState expected) {
         if (this.state.get() != expected) {
             throw new IllegalStateException("This operation required the commands manager to be in state " + expected + ", but it "
@@ -995,6 +1011,7 @@ public abstract class CommandManager<C> {
      * @throws IllegalStateException if the manager is not in the expected state
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     protected final void lockRegistration() {
         if (this.getRegistrationState() == RegistrationState.BEFORE_REGISTRATION) {
             this.transitionOrThrow(RegistrationState.BEFORE_REGISTRATION, RegistrationState.AFTER_REGISTRATION);
@@ -1011,6 +1028,7 @@ public abstract class CommandManager<C> {
      * @return The current state
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public final @NonNull RegistrationState getRegistrationState() {
         return this.state.get();
     }
@@ -1024,16 +1042,19 @@ public abstract class CommandManager<C> {
      * @return {@code true} if the registration is allowed, else {@code false}
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public boolean isCommandRegistrationAllowed() {
         return this.getSetting(ManagerSettings.ALLOW_UNSAFE_REGISTRATION) || this.state.get() != RegistrationState.AFTER_REGISTRATION;
     }
 
+
     /**
      * Configurable command related settings
      *
      * @see CommandManager#setSetting(ManagerSettings, boolean) Set a manager setting
      * @see CommandManager#getSetting(ManagerSettings) Get a manager setting
      */
+    @API(status = API.Status.STABLE)
     public enum ManagerSettings {
         /**
          * Do not create a compound permission and do not look greedily
@@ -1057,6 +1078,7 @@ public abstract class CommandManager<C> {
          *
          * @since 1.2.0
          */
+        @API(status = API.Status.STABLE, since = "1.2.0")
         ALLOW_UNSAFE_REGISTRATION,
 
         /**
@@ -1064,14 +1086,17 @@ public abstract class CommandManager<C> {
          *
          * @since 1.2.0
          */
+        @API(status = API.Status.STABLE, since = "1.2.0")
         OVERRIDE_EXISTING_COMMANDS
     }
 
+
     /**
      * The point in the registration lifecycle for this commands manager
      *
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public enum RegistrationState {
         /**
          * The point when no commands have been registered yet.

cloud-core/src/main/java/cloud/commandframework/CommandTree.java

@@ -60,6 +60,7 @@ import java.util.Queue;
 import java.util.Set;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -90,6 +91,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 public final class CommandTree<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/Description.java

@@ -24,6 +24,7 @@
 package cloud.commandframework;
 
 import cloud.commandframework.arguments.CommandArgument;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @deprecated to become package-private since 1.4.0. Use {@link ArgumentDescription} instead.
  */
 @Deprecated
+@API(status = API.Status.DEPRECATED, since = "1.4.0")
 public final class Description implements ArgumentDescription {
 
     /**

cloud-core/src/main/java/cloud/commandframework/LockableCommandManager.java

@@ -27,6 +27,7 @@ import cloud.commandframework.execution.AsynchronousCommandExecutionCoordinator;
 import cloud.commandframework.execution.CommandExecutionCoordinator;
 import cloud.commandframework.internal.CommandRegistrationHandler;
 import java.util.function.Function;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -42,6 +43,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @deprecated Use a normal {@link CommandManager}'s registration state instead
  */
 @Deprecated
+@API(status = API.Status.DEPRECATED, since = "1.2.0")
 public abstract class LockableCommandManager<C> extends CommandManager<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/annotations/AnnotatedElementAccessor.java

@@ -29,9 +29,11 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Objects;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 final class AnnotatedElementAccessor implements AnnotationAccessor {
 
     private final AnnotatedElement element;

cloud-core/src/main/java/cloud/commandframework/annotations/AnnotationAccessor.java

@@ -27,6 +27,7 @@ import java.lang.annotation.Annotation;
 import java.lang.reflect.AnnotatedElement;
 import java.util.Collection;
 import java.util.Collections;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -35,6 +36,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  *
  * @since 1.2.0
  */
+@API(status = API.Status.STABLE, since = "1.2.0")
 public interface AnnotationAccessor {
 
     /**
@@ -43,6 +45,7 @@ public interface AnnotationAccessor {
      * @return Empty annotation accessor
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     static @NonNull AnnotationAccessor empty() {
         return new NullAnnotationAccessor();
     }
@@ -67,6 +70,7 @@ public interface AnnotationAccessor {
      * @return Annotation accessor that delegates to the given accessors (using their natural ordering)
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     static @NonNull AnnotationAccessor of(final @NonNull AnnotationAccessor@NonNull... accessors) {
         return new MultiDelegateAnnotationAccessor(accessors);
     }
@@ -95,6 +99,7 @@ public interface AnnotationAccessor {
      *
      * @since 1.3.0
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*", since = "1.3.0")
     final class NullAnnotationAccessor implements AnnotationAccessor {
 
         @Override

cloud-core/src/main/java/cloud/commandframework/annotations/MultiDelegateAnnotationAccessor.java

@@ -28,9 +28,11 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 final class MultiDelegateAnnotationAccessor implements AnnotationAccessor {
 
     private final AnnotationAccessor[] accessors;

cloud-core/src/main/java/cloud/commandframework/annotations/injection/GuiceInjectionService.java

@@ -28,6 +28,7 @@ import cloud.commandframework.context.CommandContext;
 import cloud.commandframework.types.tuples.Triplet;
 import com.google.inject.ConfigurationException;
 import com.google.inject.Injector;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -37,6 +38,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @param <C> Command sender type
  * @since 1.4.0
  */
+@API(status = API.Status.STABLE, since = "1.4.0")
 public final class GuiceInjectionService<C> implements InjectionService<C> {
 
     private final Injector injector;

cloud-core/src/main/java/cloud/commandframework/annotations/injection/InjectionService.java

@@ -27,6 +27,7 @@ import cloud.commandframework.annotations.AnnotationAccessor;
 import cloud.commandframework.context.CommandContext;
 import cloud.commandframework.services.types.Service;
 import cloud.commandframework.types.tuples.Triplet;
+import org.apiguardian.api.API;
 
 /**
  * Service that can be registered to the {@link ParameterInjectorRegistry} in order to provide
@@ -37,6 +38,7 @@ import cloud.commandframework.types.tuples.Triplet;
  * @since 1.4.0
  */
 @FunctionalInterface
+@API(status = API.Status.STABLE, since = "1.4.0")
 public interface InjectionService<C> extends
         Service<Triplet<CommandContext<C>, Class<?>, AnnotationAccessor>, Object> {
 

cloud-core/src/main/java/cloud/commandframework/annotations/injection/ParameterInjector.java

@@ -25,6 +25,7 @@ package cloud.commandframework.annotations.injection;
 
 import cloud.commandframework.annotations.AnnotationAccessor;
 import cloud.commandframework.context.CommandContext;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -37,6 +38,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @since 1.2.0
  */
 @FunctionalInterface
+@API(status = API.Status.STABLE, since = "1.2.0")
 public interface ParameterInjector<C, T> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/annotations/injection/ParameterInjectorRegistry.java

@@ -36,6 +36,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -46,6 +47,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @since 1.2.0
  */
 @SuppressWarnings("ALL")
+@API(status = API.Status.STABLE, since = "1.2.0")
 public final class ParameterInjectorRegistry<C> implements InjectionService<C> {
 
     private volatile int injectorCount = 0;
@@ -124,6 +126,7 @@ public final class ParameterInjectorRegistry<C> implements InjectionService<C> {
      * @since 1.4.0
      */
     @SuppressWarnings("EmptyCatch")
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <@NonNull T> @NonNull Optional<T> getInjectable(
             final @NonNull Class<T> clazz,
             final @NonNull CommandContext<C> context,
@@ -145,6 +148,7 @@ public final class ParameterInjectorRegistry<C> implements InjectionService<C> {
      * @param service Service implementation
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public void registerInjectionService(final InjectionService<C> service) {
         this.servicePipeline.registerServiceImplementation(new TypeToken<InjectionService<C>>() {
         }, service, Collections.emptyList());

cloud-core/src/main/java/cloud/commandframework/annotations/specifier/Completions.java

@@ -28,12 +28,14 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import org.apiguardian.api.API;
 
 /**
  * Command completions, separated by "," or ", "
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.PARAMETER)
+@API(status = API.Status.STABLE)
 public @interface Completions {
 
     /**

cloud-core/src/main/java/cloud/commandframework/annotations/specifier/FlagYielding.java

@@ -27,6 +27,7 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import org.apiguardian.api.API;
 
 /**
  * Indicates that the argument should stop parsing when encountering what
@@ -38,6 +39,7 @@ import java.lang.annotation.Target;
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.PARAMETER)
+@API(status = API.Status.STABLE, since = "1.7.0")
 public @interface FlagYielding {
 
 }

cloud-core/src/main/java/cloud/commandframework/annotations/specifier/Greedy.java

@@ -27,12 +27,14 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import org.apiguardian.api.API;
 
 /**
  * Annotation used to make {@link cloud.commandframework.arguments.standard.StringArgument string arguments} greedy
  */
 @Target(ElementType.PARAMETER)
 @Retention(RetentionPolicy.RUNTIME)
+@API(status = API.Status.STABLE)
 public @interface Greedy {
 
 }

cloud-core/src/main/java/cloud/commandframework/annotations/specifier/Liberal.java

@@ -27,6 +27,7 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import org.apiguardian.api.API;
 
 /**
  * Annotation used to set the parsing mode of a {@link cloud.commandframework.arguments.standard.BooleanArgument boolean
@@ -36,6 +37,7 @@ import java.lang.annotation.Target;
  */
 @Target(ElementType.PARAMETER)
 @Retention(RetentionPolicy.RUNTIME)
+@API(status = API.Status.STABLE, since = "1.6.0")
 public @interface Liberal {
 
 }

cloud-core/src/main/java/cloud/commandframework/annotations/specifier/Quoted.java

@@ -27,6 +27,7 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import org.apiguardian.api.API;
 
 /**
  * Annotation used to set the parsing mode of a {@link cloud.commandframework.arguments.standard.StringArgument string
@@ -36,6 +37,7 @@ import java.lang.annotation.Target;
  */
 @Target(ElementType.PARAMETER)
 @Retention(RetentionPolicy.RUNTIME)
+@API(status = API.Status.STABLE, since = "1.5.0")
 public @interface Quoted {
 
 }

cloud-core/src/main/java/cloud/commandframework/annotations/specifier/Range.java

@@ -28,6 +28,7 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -36,6 +37,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.PARAMETER)
+@API(status = API.Status.STABLE)
 public @interface Range {
 
     /**

cloud-core/src/main/java/cloud/commandframework/arguments/CommandArgument.java

@@ -42,6 +42,7 @@ import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
 import java.util.regex.Pattern;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
@@ -53,6 +54,7 @@ import org.checkerframework.common.returnsreceiver.qual.This;
  * @param <T> The type that the argument parses into
  */
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>, CloudKeyHolder<T> {
 
     /**
@@ -126,6 +128,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
      * @param argumentPreprocessors Argument preprocessors
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public CommandArgument(
             final boolean required,
             final @NonNull String name,
@@ -219,6 +222,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
      * @param defaultDescription    Default description to use when registering
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public CommandArgument(
             final boolean required,
             final @NonNull String name,
@@ -265,6 +269,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
      * @param defaultDescription    Default description to use when registering
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public CommandArgument(
             final boolean required,
             final @NonNull String name,
@@ -281,7 +286,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
     /**
      * Construct a new command argument
      *
-     * @param required  Whether or not the argument is required
+     * @param required  Whether the argument is required
      * @param name      The argument name
      * @param parser    The argument parser
      * @param valueType Type produced by the parser
@@ -417,8 +422,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
      *
      * @return Owning command
      */
-    @Nullable
+    public @Nullable Command<C> getOwningCommand() {
-    public Command<C> getOwningCommand() {
         return this.owningCommand;
     }
 
@@ -537,7 +541,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
     }
 
     /**
-     * Check whether or not the argument has been used in a command
+     * Check whether the argument has been used in a command
      *
      * @return {@code true} if the argument has been used in a command, else {@code false}
      */
@@ -559,6 +563,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
      * @param <C> Command sender type
      * @param <T> Argument value type
      */
+    @API(status = API.Status.STABLE)
     public static class Builder<C, T> {
 
         private final TypeToken<T> valueType;
@@ -679,6 +684,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
          * @return Builder instance
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public @NonNull @This Builder<@NonNull C, @NonNull T> withDefaultDescription(
                 final @NonNull ArgumentDescription defaultDescription
         ) {
@@ -753,6 +759,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>,
      * @param <B> the subclass type
      * @since 1.5.0
      */
+    @API(status = API.Status.STABLE, since = "1.5.0")
     public abstract static class TypedBuilder<C, T, B extends Builder<C, T>> extends Builder<C, T> {
 
         protected TypedBuilder(

cloud-core/src/main/java/cloud/commandframework/arguments/CommandSuggestionEngine.java

@@ -25,6 +25,7 @@ package cloud.commandframework.arguments;
 
 import cloud.commandframework.context.CommandContext;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public interface CommandSuggestionEngine<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/arguments/CommandSyntaxFormatter.java

@@ -25,6 +25,7 @@ package cloud.commandframework.arguments;
 
 import cloud.commandframework.CommandTree;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -34,6 +35,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @param <C> Command sender type
  */
 @FunctionalInterface
+@API(status = API.Status.STABLE)
 public interface CommandSyntaxFormatter<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/arguments/DelegatingCommandSuggestionEngine.java

@@ -32,6 +32,7 @@ import cloud.commandframework.services.State;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -39,6 +40,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 public final class DelegatingCommandSuggestionEngine<C> implements CommandSuggestionEngine<C> {
 
     private static final List<String> SINGLE_EMPTY_SUGGESTION = Collections.unmodifiableList(Collections.singletonList(""));

cloud-core/src/main/java/cloud/commandframework/arguments/DelegatingCommandSuggestionEngineFactory.java

@@ -25,6 +25,7 @@ package cloud.commandframework.arguments;
 
 import cloud.commandframework.CommandManager;
 import cloud.commandframework.CommandTree;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class DelegatingCommandSuggestionEngineFactory<C> {
 
     private final CommandManager<C> commandManager;

cloud-core/src/main/java/cloud/commandframework/arguments/DelegatingSuggestionsProvider.java

@@ -27,8 +27,10 @@ import cloud.commandframework.arguments.parser.ArgumentParser;
 import cloud.commandframework.context.CommandContext;
 import java.util.List;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 final class DelegatingSuggestionsProvider<C> implements BiFunction<@NonNull CommandContext<C>,
         @NonNull String, @NonNull List<String>> {
 

cloud-core/src/main/java/cloud/commandframework/arguments/StandardCommandSyntaxFormatter.java

@@ -29,6 +29,7 @@ import cloud.commandframework.arguments.compound.FlagArgument;
 import cloud.commandframework.arguments.flags.CommandFlag;
 import java.util.Iterator;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -42,6 +43,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 public class StandardCommandSyntaxFormatter<C> implements CommandSyntaxFormatter<C> {
 
     /**
@@ -132,6 +134,7 @@ public class StandardCommandSyntaxFormatter<C> implements CommandSyntaxFormatter
     /**
      * Instance that is used when building command syntax
      */
+    @API(status = API.Status.STABLE)
     public static class FormattingInstance {
 
         private final StringBuilder builder;

cloud-core/src/main/java/cloud/commandframework/arguments/StaticArgument.java

@@ -35,6 +35,7 @@ import java.util.List;
 import java.util.Queue;
 import java.util.Set;
 import java.util.TreeSet;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -42,6 +43,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class StaticArgument<C> extends CommandArgument<C, String> {
 
     private StaticArgument(final boolean required, final @NonNull String name, final @NonNull String... aliases) {

cloud-core/src/main/java/cloud/commandframework/arguments/compound/ArgumentPair.java

@@ -30,6 +30,7 @@ import cloud.commandframework.arguments.parser.ParserRegistry;
 import cloud.commandframework.types.tuples.Pair;
 import io.leangen.geantyref.TypeToken;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -40,6 +41,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @param <V> Second argument type
  * @param <O> Output type
  */
+@API(status = API.Status.STABLE)
 public class ArgumentPair<C, U, V, O> extends CompoundArgument<Pair<U, V>, C, O> {
 
     /**
@@ -104,7 +106,9 @@ public class ArgumentPair<C, U, V, O> extends CompoundArgument<Pair<U, V>, C, O>
         return new ArgumentPairIntermediaryBuilder<>(true, name, names, Pair.of(firstParser, secondaryParser), types);
     }
 
+
     @SuppressWarnings("ALL")
+    @API(status = API.Status.STABLE)
     public static final class ArgumentPairIntermediaryBuilder<C, U, V> {
 
         private final boolean required;

cloud-core/src/main/java/cloud/commandframework/arguments/compound/ArgumentTriplet.java

@@ -30,6 +30,7 @@ import cloud.commandframework.arguments.parser.ParserRegistry;
 import cloud.commandframework.types.tuples.Triplet;
 import io.leangen.geantyref.TypeToken;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -41,6 +42,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @param <W> Third argument type
  * @param <O> Output type
  */
+@API(status = API.Status.STABLE)
 public class ArgumentTriplet<C, U, V, W, O> extends CompoundArgument<Triplet<U, V, W>, C, O> {
 
     /**
@@ -115,7 +117,9 @@ public class ArgumentTriplet<C, U, V, W, O> extends CompoundArgument<Triplet<U,
         );
     }
 
+
     @SuppressWarnings("ALL")
+    @API(status = API.Status.STABLE)
     public static final class ArgumentTripletIntermediaryBuilder<C, U, V, W> {
 
         private final boolean required;

cloud-core/src/main/java/cloud/commandframework/arguments/compound/CompoundArgument.java

@@ -33,6 +33,7 @@ import java.util.List;
 import java.util.Queue;
 import java.util.function.BiFunction;
 import java.util.function.Function;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -42,6 +43,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @param <C> Command sender type
  * @param <O> Output type
  */
+@API(status = API.Status.STABLE)
 public class CompoundArgument<T extends Tuple, C, O> extends CommandArgument<C, O> {
 
     private final Tuple types;

cloud-core/src/main/java/cloud/commandframework/arguments/compound/FlagArgument.java

@@ -47,6 +47,7 @@ import java.util.Set;
 import java.util.function.BiFunction;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -55,6 +56,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class FlagArgument<C> extends CommandArgument<C, Object> {
 
     private static final Pattern FLAG_PRIMARY_PATTERN = Pattern.compile(" --(?<name>([A-Za-z]+))");
@@ -105,6 +107,7 @@ public final class FlagArgument<C> extends CommandArgument<C, Object> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class FlagArgumentParser<C> implements ArgumentParser<C, Object> {
 
         private final CommandFlag<?>[] flags;
@@ -289,6 +292,7 @@ public final class FlagArgument<C> extends CommandArgument<C, Object> {
             return this.suggestions(commandContext, input);
         }
 
+
         /**
          * Helper class to parse the command input queue into flags
          * and flag values. On failure the intermediate results
@@ -472,9 +476,11 @@ public final class FlagArgument<C> extends CommandArgument<C, Object> {
         }
     }
 
+
     /**
      * Flag parse exception
      */
+    @API(status = API.Status.STABLE)
     public static final class FlagParseException extends ParserException {
 
         private static final long serialVersionUID = -7725389394142868549L;
@@ -513,9 +519,11 @@ public final class FlagArgument<C> extends CommandArgument<C, Object> {
 
     }
 
+
     /**
      * Reasons for which flag parsing may fail
      */
+    @API(status = API.Status.STABLE)
     public enum FailureReason {
 
         UNKNOWN_FLAG(StandardCaptionKeys.ARGUMENT_PARSE_FAILURE_FLAG_UNKNOWN_FLAG),

cloud-core/src/main/java/cloud/commandframework/arguments/flags/CommandFlag.java

@@ -32,6 +32,7 @@ import java.util.Collection;
 import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -43,6 +44,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @param <T> Command argument type. {@link Void} is used when no argument is present.
  */
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class CommandFlag<T> {
 
     private final @NonNull String name;
@@ -101,6 +103,7 @@ public final class CommandFlag<T> {
      * @deprecated for removal since 1.4.0. Use {@link #getArgumentDescription()} instead.
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.4.0")
     public cloud.commandframework.@NonNull Description getDescription() {
         if (this.description instanceof cloud.commandframework.Description) {
             return ((cloud.commandframework.Description) this.description);
@@ -115,6 +118,7 @@ public final class CommandFlag<T> {
      * @return Flag description
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public @NonNull ArgumentDescription getArgumentDescription() {
         return this.description;
     }
@@ -134,6 +138,7 @@ public final class CommandFlag<T> {
      * @return Command permission, or {@code null}
      * @since 1.6.0
      */
+    @API(status = API.Status.STABLE, since = "1.6.0")
     public CommandPermission permission() {
         return this.permission;
     }
@@ -161,6 +166,7 @@ public final class CommandFlag<T> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class Builder<T> {
 
         private final String name;
@@ -227,6 +233,7 @@ public final class CommandFlag<T> {
          * @deprecated for removal since 1.4.0. Use {@link #withDescription(ArgumentDescription)} instead.
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.4.0")
         public Builder<T> withDescription(final cloud.commandframework.@NonNull Description description) {
             return this.withDescription((ArgumentDescription) description);
         }
@@ -238,6 +245,7 @@ public final class CommandFlag<T> {
          * @return New builder instance
          * @since 1.4.0
          */
+        @API(status = API.Status.STABLE, since = "1.4.0")
         public Builder<T> withDescription(final @NonNull ArgumentDescription description) {
             return new Builder<>(this.name, this.aliases, description, this.permission, this.commandArgument);
         }
@@ -271,6 +279,7 @@ public final class CommandFlag<T> {
          * @return New builder instance
          * @since 1.6.0
          */
+        @API(status = API.Status.STABLE, since = "1.6.0")
         public Builder<T> withPermission(final @NonNull CommandPermission permission) {
             return new Builder<>(this.name, this.aliases, this.description, permission, this.commandArgument);
         }

cloud-core/src/main/java/cloud/commandframework/arguments/flags/FlagContext.java

@@ -26,12 +26,14 @@ package cloud.commandframework.arguments.flags;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
  * Flag value mappings
  */
+@API(status = API.Status.STABLE)
 public final class FlagContext {
 
     /**
@@ -99,6 +101,7 @@ public final class FlagContext {
      *         else {@code false}
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public boolean isPresent(final @NonNull CommandFlag<Void> flag) {
         return this.isPresent(flag.getName());
     }
@@ -111,6 +114,7 @@ public final class FlagContext {
      * @return Optional containing stored value if present
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public <T> @NonNull Optional<T> getValue(
             final @NonNull String name
     ) {
@@ -130,6 +134,7 @@ public final class FlagContext {
      * @return Optional containing stored value if present
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @NonNull Optional<T> getValue(
             final @NonNull CommandFlag<T> flag
     ) {
@@ -160,6 +165,7 @@ public final class FlagContext {
      * @return Stored value, or the supplied default value
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @Nullable T getValue(
             final @NonNull CommandFlag<T> name,
             final @Nullable T defaultValue
@@ -176,6 +182,7 @@ public final class FlagContext {
      * @return whether the flag is present
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public boolean hasFlag(
             final @NonNull String name
     ) {
@@ -191,6 +198,7 @@ public final class FlagContext {
      * @return whether the flag is present
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public boolean hasFlag(
             final @NonNull CommandFlag<?> flag
     ) {
@@ -206,6 +214,7 @@ public final class FlagContext {
      * @return whether the flag is present
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public boolean contains(final @NonNull String name) {
         return this.hasFlag(name);
     }
@@ -219,6 +228,7 @@ public final class FlagContext {
      * @return whether the flag is present
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public boolean contains(final @NonNull CommandFlag<?> flag) {
         return this.hasFlag(flag);
     }
@@ -232,6 +242,7 @@ public final class FlagContext {
      * @since 1.3.0
      */
     @SuppressWarnings("TypeParameterUnusedInFormals")
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public <T> @Nullable T get(
             final @NonNull String name
     ) {
@@ -246,6 +257,7 @@ public final class FlagContext {
      * @return Stored value if present, else {@code null}
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @Nullable T get(
             final @NonNull CommandFlag<T> flag
     ) {

cloud-core/src/main/java/cloud/commandframework/arguments/parser/ArgumentParseResult.java

@@ -25,6 +25,7 @@ package cloud.commandframework.arguments.parser;
 
 import java.util.Optional;
 import java.util.function.Function;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
@@ -33,6 +34,7 @@ import org.checkerframework.common.returnsreceiver.qual.This;
  *
  * @param <T> Parser return type
  */
+@API(status = API.Status.STABLE)
 public abstract class ArgumentParseResult<T> {
 
     private ArgumentParseResult() {
@@ -75,6 +77,7 @@ public abstract class ArgumentParseResult<T> {
      * @return a new result if successful, otherwise a failure
      * @since 1.5.0
      */
+    @API(status = API.Status.STABLE, since = "1.5.0")
     public abstract <U> @NonNull ArgumentParseResult<U> mapParsedValue(Function<T, U> mapper);
 
     /**
@@ -85,6 +88,7 @@ public abstract class ArgumentParseResult<T> {
      * @return a new result if successful, otherwise a failure
      * @since 1.5.0
      */
+    @API(status = API.Status.STABLE, since = "1.5.0")
     public abstract <U> @NonNull ArgumentParseResult<U> flatMapParsedValue(Function<T, ArgumentParseResult<U>> mapper);
 
     /**
@@ -101,6 +105,7 @@ public abstract class ArgumentParseResult<T> {
      * @return if this is a failure, a transformed result, otherwise this
      * @since 1.5.0
      */
+    @API(status = API.Status.STABLE, since = "1.5.0")
     public abstract @NonNull ArgumentParseResult<T> mapFailure(Function<Throwable, Throwable> mapper);
 
 
@@ -160,13 +165,13 @@ public abstract class ArgumentParseResult<T> {
 
         @Override
         @SuppressWarnings("unchecked")
-        public @NonNull <U> ArgumentParseResult<U> mapParsedValue(final Function<T, U> mapper) {
+        public @NonNull <U> @This ArgumentParseResult<U> mapParsedValue(final Function<T, U> mapper) {
             return (ArgumentParseResult<U>) this;
         }
 
         @Override
         @SuppressWarnings("unchecked")
-        public @NonNull <U> ArgumentParseResult<U> flatMapParsedValue(final Function<T, ArgumentParseResult<U>> mapper) {
+        public @NonNull <U> @This ArgumentParseResult<U> flatMapParsedValue(final Function<T, ArgumentParseResult<U>> mapper) {
             return (ArgumentParseResult<U>) this;
         }
 

cloud-core/src/main/java/cloud/commandframework/arguments/parser/ArgumentParser.java

@@ -28,6 +28,7 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 import static java.util.Objects.requireNonNull;
@@ -39,6 +40,7 @@ import static java.util.Objects.requireNonNull;
  * @param <T> Value type
  */
 @FunctionalInterface
+@API(status = API.Status.STABLE)
 public interface ArgumentParser<C, T> {
 
     /**
@@ -99,12 +101,13 @@ public interface ArgumentParser<C, T> {
      * @return a derived parser.
      * @since 1.5.0
      */
+    @API(status = API.Status.STABLE, since = "1.5.0")
     default <O> @NonNull ArgumentParser<C, O> map(final BiFunction<CommandContext<C>, T, ArgumentParseResult<O>> mapper) {
         return new MappedArgumentParser<>(this, requireNonNull(mapper, "mapper"));
     }
 
     /**
-     * Check whether or not this argument parser is context free. A context free
+     * Check whether this argument parser is context free. A context free
      * parser will not use the provided command context, and so supports impromptu parsing
      *
      * @return {@code true} if the parser is context free, else {@code false}
@@ -120,6 +123,7 @@ public interface ArgumentParser<C, T> {
      * @return The number of arguments tha the parser expects
      * @since 1.1.0
      */
+    @API(status = API.Status.STABLE, since = "1.1.0")
     default int getRequestedArgumentCount() {
         return DEFAULT_ARGUMENT_COUNT;
     }

cloud-core/src/main/java/cloud/commandframework/arguments/parser/MappedArgumentParser.java

@@ -27,6 +27,7 @@ import cloud.commandframework.context.CommandContext;
 import java.util.List;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -38,6 +39,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @param <O> mapped output type
  * @since 1.5.0
  */
+@API(status = API.Status.STABLE, since = "1.5.0")
 public final class MappedArgumentParser<C, I, O> implements ArgumentParser<C, O> {
     private final ArgumentParser<C, I> base;
     private final BiFunction<CommandContext<C>, I, ArgumentParseResult<O>> mapper;

cloud-core/src/main/java/cloud/commandframework/arguments/parser/ParserParameter.java

@@ -25,6 +25,7 @@ package cloud.commandframework.arguments.parser;
 
 import io.leangen.geantyref.TypeToken;
 import java.util.Objects;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <T> Type required by the parameter
  */
+@API(status = API.Status.STABLE)
 public class ParserParameter<T> {
 
     private final String key;

cloud-core/src/main/java/cloud/commandframework/arguments/parser/ParserParameters.java

@@ -26,11 +26,13 @@ package cloud.commandframework.arguments.parser;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Collection of {@link ParserParameter parameter}-{@link Object object} pairs
  */
+@API(status = API.Status.STABLE)
 public final class ParserParameters {
 
     private final Map<ParserParameter<?>, Object> internalMap = new HashMap<>();

cloud-core/src/main/java/cloud/commandframework/arguments/parser/ParserRegistry.java

@@ -31,6 +31,7 @@ import java.util.List;
 import java.util.Optional;
 import java.util.function.BiFunction;
 import java.util.function.Function;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -40,6 +41,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public interface ParserRegistry<C> {
 
     /**
@@ -130,6 +132,7 @@ public interface ParserRegistry<C> {
      * @see #getSuggestionProvider(String) Get a suggestion provider
      * @since 1.1.0
      */
+    @API(status = API.Status.STABLE, since = "1.1.0")
     void registerSuggestionProvider(
             @NonNull String name,
             @NonNull BiFunction<@NonNull CommandContext<C>, @NonNull String, @NonNull List<String>> suggestionsProvider
@@ -144,6 +147,7 @@ public interface ParserRegistry<C> {
      * @see #registerSuggestionProvider(String, BiFunction) Register a suggestion provider
      * @since 1.1.0
      */
+    @API(status = API.Status.STABLE, since = "1.1.0")
     @NonNull Optional<BiFunction<@NonNull CommandContext<C>, @NonNull String, @NonNull List<String>>> getSuggestionProvider(
             @NonNull String name
     );

cloud-core/src/main/java/cloud/commandframework/arguments/parser/StandardParameters.java

@@ -24,11 +24,13 @@
 package cloud.commandframework.arguments.parser;
 
 import io.leangen.geantyref.TypeToken;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Common parser parameters used when resolving types in the {@link ParserRegistry}
  */
+@API(status = API.Status.STABLE)
 public final class StandardParameters {
 
     /**
@@ -65,6 +67,7 @@ public final class StandardParameters {
      * @since 1.7.0
      * @see cloud.commandframework.annotations.specifier.FlagYielding
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public static final ParserParameter<Boolean> FLAG_YIELDING = create(
             "flag_yielding",
             TypeToken.get(Boolean.class)
@@ -74,12 +77,14 @@ public final class StandardParameters {
      *
      * @since 1.5.0
      */
+    @API(status = API.Status.STABLE, since = "1.5.0")
     public static final ParserParameter<Boolean> QUOTED = create("quoted", TypeToken.get(Boolean.class));
     /**
      * Indicates that a boolean argument should be liberal.
      *
      * @since 1.6.0
      */
+    @API(status = API.Status.STABLE, since = "1.6.0")
     public static final ParserParameter<Boolean> LIBERAL = create("liberal", TypeToken.get(Boolean.class));
 
     private StandardParameters() {

cloud-core/src/main/java/cloud/commandframework/arguments/parser/StandardParserRegistry.java

@@ -56,6 +56,7 @@ import java.util.Optional;
 import java.util.UUID;
 import java.util.function.BiFunction;
 import java.util.function.Function;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -64,6 +65,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @param <C> Command sender type
  */
 @SuppressWarnings({"unused", "unchecked", "rawtypes"})
+@API(status = API.Status.STABLE)
 public final class StandardParserRegistry<C> implements ParserRegistry<C> {
 
     @SuppressWarnings({"DoubleBraceInitialization"})

cloud-core/src/main/java/cloud/commandframework/arguments/preprocessor/RegexPreprocessor.java

@@ -33,6 +33,7 @@ import java.util.Queue;
 import java.util.function.BiFunction;
 import java.util.function.Predicate;
 import java.util.regex.Pattern;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -41,6 +42,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @param <C> Command sender type
  */
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class RegexPreprocessor<C> implements BiFunction<@NonNull CommandContext<C>, @NonNull Queue<@NonNull String>,
         @NonNull ArgumentParseResult<Boolean>> {
 
@@ -113,6 +115,7 @@ public final class RegexPreprocessor<C> implements BiFunction<@NonNull CommandCo
      * Exception thrown when input fails regex matching in {@link RegexPreprocessor}
      */
     @SuppressWarnings("serial")
+    @API(status = API.Status.STABLE)
     public static final class RegexValidationException extends IllegalArgumentException {
 
         private static final long serialVersionUID = 747826566058072233L;

cloud-core/src/main/java/cloud/commandframework/arguments/standard/BooleanArgument.java

@@ -37,11 +37,13 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class BooleanArgument<C> extends CommandArgument<C, Boolean> {
 
     private final boolean liberal;
@@ -116,6 +118,8 @@ public final class BooleanArgument<C> extends CommandArgument<C, Boolean> {
         return this.liberal;
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Boolean> {
 
         private boolean liberal = false;
@@ -154,6 +158,8 @@ public final class BooleanArgument<C> extends CommandArgument<C, Boolean> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class BooleanParser<C> implements ArgumentParser<C, Boolean> {
 
         private static final List<String> LIBERAL = Arrays.asList("TRUE", "YES", "ON", "FALSE", "NO", "OFF");
@@ -236,6 +242,7 @@ public final class BooleanArgument<C> extends CommandArgument<C, Boolean> {
     /**
      * Boolean parse exception
      */
+    @API(status = API.Status.STABLE)
     public static final class BooleanParseException extends ParserException {
 
         private static final long serialVersionUID = -2688852086944850025L;

cloud-core/src/main/java/cloud/commandframework/arguments/standard/ByteArgument.java

@@ -34,11 +34,13 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class ByteArgument<C> extends CommandArgument<C, Byte> {
 
     private final byte min;
@@ -125,6 +127,8 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
         return this.max;
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Byte> {
 
         private byte min = ByteParser.DEFAULT_MINIMUM;
@@ -164,6 +168,7 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
          * @see CommandArgument.Builder#asOptionalWithDefault(String)
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public @NonNull Builder<C> asOptionalWithDefault(final byte defaultValue) {
             return (Builder<C>) this.asOptionalWithDefault(Byte.toString(defaultValue));
         }
@@ -182,6 +187,8 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class ByteParser<C> implements ArgumentParser<C, Byte> {
 
         /**
@@ -189,6 +196,7 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final byte DEFAULT_MINIMUM = Byte.MIN_VALUE;
 
         /**
@@ -196,6 +204,7 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final byte DEFAULT_MAXIMUM = Byte.MAX_VALUE;
 
         private final byte min;
@@ -271,6 +280,7 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMax() {
             return this.max != DEFAULT_MAXIMUM;
         }
@@ -282,6 +292,7 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMin() {
             return this.min != DEFAULT_MINIMUM;
         }
@@ -309,6 +320,7 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
          * @deprecated use {@link #ByteParseException(String, ByteParser, CommandContext)} instead
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.5.0")
         public ByteParseException(
                 final @NonNull String input,
                 final byte min,
@@ -326,6 +338,7 @@ public final class ByteArgument<C> extends CommandArgument<C, Byte> {
          * @param context command context
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public ByteParseException(
                 final @NonNull String input,
                 final @NonNull ByteParser<?> parser,

cloud-core/src/main/java/cloud/commandframework/arguments/standard/CharArgument.java

@@ -36,10 +36,12 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class CharArgument<C> extends CommandArgument<C, Character> {
 
     private CharArgument(
@@ -102,6 +104,7 @@ public final class CharArgument<C> extends CommandArgument<C, Character> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Character> {
 
         private Builder(final @NonNull String name) {
@@ -123,6 +126,7 @@ public final class CharArgument<C> extends CommandArgument<C, Character> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class CharacterParser<C> implements ArgumentParser<C, Character> {
 
         @Override
@@ -157,6 +161,7 @@ public final class CharArgument<C> extends CommandArgument<C, Character> {
     /**
      * Char parse exception
      */
+    @API(status = API.Status.STABLE)
     public static final class CharParseException extends ParserException {
 
         private static final long serialVersionUID = 6458851071584278854L;

cloud-core/src/main/java/cloud/commandframework/arguments/standard/DoubleArgument.java

@@ -34,11 +34,13 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class DoubleArgument<C> extends CommandArgument<C, Double> {
 
     private final double min;
@@ -125,6 +127,8 @@ public final class DoubleArgument<C> extends CommandArgument<C, Double> {
         return this.max;
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Double> {
 
         private double min = DoubleParser.DEFAULT_MINIMUM;
@@ -164,6 +168,7 @@ public final class DoubleArgument<C> extends CommandArgument<C, Double> {
          * @see CommandArgument.Builder#asOptionalWithDefault(String)
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public @NonNull Builder<C> asOptionalWithDefault(final double defaultValue) {
             return (Builder<C>) this.asOptionalWithDefault(Double.toString(defaultValue));
         }
@@ -182,6 +187,8 @@ public final class DoubleArgument<C> extends CommandArgument<C, Double> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class DoubleParser<C> implements ArgumentParser<C, Double> {
 
         /**
@@ -189,6 +196,7 @@ public final class DoubleArgument<C> extends CommandArgument<C, Double> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final double DEFAULT_MINIMUM = Double.NEGATIVE_INFINITY;
 
         /**
@@ -196,6 +204,7 @@ public final class DoubleArgument<C> extends CommandArgument<C, Double> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final double DEFAULT_MAXIMUM = Double.POSITIVE_INFINITY;
 
         private final double min;
@@ -282,6 +291,7 @@ public final class DoubleArgument<C> extends CommandArgument<C, Double> {
 
 
     @SuppressWarnings("serial")
+    @API(status = API.Status.STABLE)
     public static final class DoubleParseException extends NumberParseException {
 
         private static final long serialVersionUID = 1764554911581976586L;

cloud-core/src/main/java/cloud/commandframework/arguments/standard/DurationArgument.java

@@ -43,6 +43,7 @@ import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 import java.util.stream.Stream;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -52,6 +53,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @param <C> sender type
  * @since 1.7.0
  */
+@API(status = API.Status.STABLE, since = "1.7.0")
 public final class DurationArgument<C> extends CommandArgument<C, Duration> {
 
     /**
@@ -153,6 +155,7 @@ public final class DurationArgument<C> extends CommandArgument<C, Duration> {
      * @param <C> sender type
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public static final class Builder<C> extends TypedBuilder<C, Duration, Builder<C>> {
 
         private Builder(final @NonNull String name) {
@@ -197,6 +200,7 @@ public final class DurationArgument<C> extends CommandArgument<C, Duration> {
      * @param <C> sender type
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public static final class Parser<C> implements ArgumentParser<C, Duration> {
 
         @Override
@@ -281,6 +285,7 @@ public final class DurationArgument<C> extends CommandArgument<C, Duration> {
      *
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public static final class DurationParseException extends ParserException {
 
         private static final long serialVersionUID = 7632293268451349508L;

cloud-core/src/main/java/cloud/commandframework/arguments/standard/EnumArgument.java

@@ -38,6 +38,7 @@ import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
 import java.util.stream.Collectors;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -48,6 +49,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @param <E> Enum type
  */
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public class EnumArgument<C, E extends Enum<E>> extends CommandArgument<C, E> {
 
     protected EnumArgument(
@@ -129,6 +131,7 @@ public class EnumArgument<C, E extends Enum<E>> extends CommandArgument<C, E> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class Builder<C, E extends Enum<E>> extends CommandArgument.Builder<C, E> {
 
         private final Class<E> enumClass;
@@ -148,6 +151,7 @@ public class EnumArgument<C, E extends Enum<E>> extends CommandArgument<C, E> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class EnumParser<C, E extends Enum<E>> implements ArgumentParser<C, E> {
 
         private final Class<E> enumClass;
@@ -202,6 +206,7 @@ public class EnumArgument<C, E extends Enum<E>> extends CommandArgument<C, E> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class EnumParseException extends ParserException {
 
         private static final long serialVersionUID = 3465389578951428862L;

cloud-core/src/main/java/cloud/commandframework/arguments/standard/FloatArgument.java

@@ -34,11 +34,13 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class FloatArgument<C> extends CommandArgument<C, Float> {
 
     private final float min;
@@ -125,6 +127,8 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
         return this.max;
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Float> {
 
         private float min = FloatParser.DEFAULT_MINIMUM;
@@ -164,6 +168,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
          * @see CommandArgument.Builder#asOptionalWithDefault(String)
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public @NonNull Builder<C> asOptionalWithDefault(final float defaultValue) {
             return (Builder<C>) this.asOptionalWithDefault(Float.toString(defaultValue));
         }
@@ -177,6 +182,8 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class FloatParser<C> implements ArgumentParser<C, Float> {
 
         /**
@@ -184,6 +191,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final float DEFAULT_MINIMUM = Float.NEGATIVE_INFINITY;
 
         /**
@@ -191,6 +199,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final float DEFAULT_MAXIMUM = Float.POSITIVE_INFINITY;
 
         private final float min;
@@ -258,6 +267,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMax() {
             return this.max != DEFAULT_MAXIMUM;
         }
@@ -269,6 +279,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMin() {
             return this.min != DEFAULT_MINIMUM;
         }
@@ -277,6 +288,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
 
 
     @SuppressWarnings("serial")
+    @API(status = API.Status.STABLE)
     public static final class FloatParseException extends NumberParseException {
 
         private static final long serialVersionUID = -1162983846751812292L;
@@ -293,6 +305,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
          * @deprecated use {@link #FloatParseException(String, FloatParser, CommandContext)} instead
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.5.0")
         public FloatParseException(
                 final @NonNull String input,
                 final float min,
@@ -310,6 +323,7 @@ public final class FloatArgument<C> extends CommandArgument<C, Float> {
          * @param commandContext command context
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public FloatParseException(
                 final @NonNull String input,
                 final @NonNull FloatParser<?> parser,

cloud-core/src/main/java/cloud/commandframework/arguments/standard/IntegerArgument.java

@@ -38,11 +38,13 @@ import java.util.Queue;
 import java.util.Set;
 import java.util.TreeSet;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
 
     private static final int MAX_SUGGESTIONS_INCREMENT = 10;
@@ -137,6 +139,8 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
         return this.max;
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Integer> {
 
         private int min = IntegerParser.DEFAULT_MINIMUM;
@@ -176,6 +180,7 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
          * @see CommandArgument.Builder#asOptionalWithDefault(String)
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public @NonNull Builder<C> asOptionalWithDefault(final int defaultValue) {
             return (Builder<C>) this.asOptionalWithDefault(Integer.toString(defaultValue));
         }
@@ -189,6 +194,8 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class IntegerParser<C> implements ArgumentParser<C, Integer> {
 
         /**
@@ -196,6 +203,7 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final int DEFAULT_MINIMUM = Integer.MIN_VALUE;
 
         /**
@@ -203,6 +211,7 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final int DEFAULT_MAXIMUM = Integer.MAX_VALUE;
 
         private final int min;
@@ -340,6 +349,7 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
 
 
     @SuppressWarnings("serial")
+    @API(status = API.Status.STABLE)
     public static final class IntegerParseException extends NumberParseException {
 
         private static final long serialVersionUID = -6933923056628373853L;
@@ -356,6 +366,7 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
          * @deprecated use {@link #IntegerParseException(String, IntegerParser, CommandContext)} instead
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.5.0")
         public IntegerParseException(
                 final @NonNull String input,
                 final int min,
@@ -373,6 +384,7 @@ public final class IntegerArgument<C> extends CommandArgument<C, Integer> {
          * @param commandContext command context
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public IntegerParseException(
                 final @NonNull String input,
                 final @NonNull IntegerParser<?> parser,

cloud-core/src/main/java/cloud/commandframework/arguments/standard/LongArgument.java

@@ -34,11 +34,13 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class LongArgument<C> extends CommandArgument<C, Long> {
 
     private final long min;
@@ -125,6 +127,8 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
         return this.max;
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Long> {
 
         private long min = LongParser.DEFAULT_MINIMUM;
@@ -164,6 +168,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
          * @see CommandArgument.Builder#asOptionalWithDefault(String)
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public @NonNull Builder<C> asOptionalWithDefault(final long defaultValue) {
             return (Builder<C>) this.asOptionalWithDefault(Long.toString(defaultValue));
         }
@@ -177,6 +182,8 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class LongParser<C> implements ArgumentParser<C, Long> {
 
         /**
@@ -184,6 +191,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final long DEFAULT_MINIMUM = Long.MIN_VALUE;
 
         /**
@@ -191,6 +199,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final long DEFAULT_MAXIMUM = Long.MAX_VALUE;
 
         private final long min;
@@ -253,6 +262,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMax() {
             return this.max != DEFAULT_MAXIMUM;
         }
@@ -264,6 +274,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMin() {
             return this.min != DEFAULT_MINIMUM;
         }
@@ -285,6 +296,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
 
 
     @SuppressWarnings("serial")
+    @API(status = API.Status.STABLE)
     public static final class LongParseException extends NumberParseException {
 
         private static final long serialVersionUID = 4366856282301198232L;
@@ -301,6 +313,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
          * @deprecated use {@link #LongParseException(String, LongParser, CommandContext)} instead
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.5.0")
         public LongParseException(
                 final @NonNull String input,
                 final long min,
@@ -318,6 +331,7 @@ public final class LongArgument<C> extends CommandArgument<C, Long> {
          * @param commandContext command context
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public LongParseException(
                 final @NonNull String input,
                 final @NonNull LongParser<?> parser,

cloud-core/src/main/java/cloud/commandframework/arguments/standard/ShortArgument.java

@@ -34,11 +34,13 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Queue;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE, since = "1.5.0")
 public final class ShortArgument<C> extends CommandArgument<C, Short> {
 
     private final short min;
@@ -122,6 +124,8 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
         return this.max;
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, Short> {
 
         private short min = ShortParser.DEFAULT_MINIMUM;
@@ -161,6 +165,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
          * @see CommandArgument.Builder#asOptionalWithDefault(String)
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public @NonNull Builder<C> asOptionalWithDefault(final short defaultValue) {
             return (Builder<C>) this.asOptionalWithDefault(Short.toString(defaultValue));
         }
@@ -174,6 +179,8 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
 
     }
 
+
+    @API(status = API.Status.STABLE)
     public static final class ShortParser<C> implements ArgumentParser<C, Short> {
 
         /**
@@ -181,6 +188,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final short DEFAULT_MINIMUM = Short.MIN_VALUE;
 
         /**
@@ -188,6 +196,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
          *
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public static final short DEFAULT_MAXIMUM = Short.MAX_VALUE;
 
         private final short min;
@@ -263,6 +272,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMax() {
             return this.max != DEFAULT_MAXIMUM;
         }
@@ -274,6 +284,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
          * @return whether the parser has a maximum set
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public boolean hasMin() {
             return this.min != DEFAULT_MINIMUM;
         }
@@ -282,6 +293,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
 
 
     @SuppressWarnings("serial")
+    @API(status = API.Status.STABLE, since = "1.5.0")
     public static final class ShortParseException extends NumberParseException {
 
         private static final long serialVersionUID = -478674263339091032L;
@@ -298,6 +310,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
          * @deprecated use {@link #ShortParseException(String, ShortParser, CommandContext)} instead
          */
         @Deprecated
+        @API(status = API.Status.DEPRECATED, since = "1.5.0")
         public ShortParseException(
                 final @NonNull String input,
                 final short min,
@@ -315,6 +328,7 @@ public final class ShortArgument<C> extends CommandArgument<C, Short> {
          * @param commandContext command context
          * @since 1.5.0
          */
+        @API(status = API.Status.STABLE, since = "1.5.0")
         public ShortParseException(
                 final @NonNull String input,
                 final @NonNull ShortParser<?> parser,

cloud-core/src/main/java/cloud/commandframework/arguments/standard/StringArgument.java

@@ -40,10 +40,12 @@ import java.util.StringJoiner;
 import java.util.function.BiFunction;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.common.returnsreceiver.qual.This;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class StringArgument<C> extends CommandArgument<C, String> {
 
     private static final Pattern QUOTED_DOUBLE = Pattern.compile("\"(?<inner>(?:[^\"\\\\]|\\\\.)*)\"");
@@ -174,6 +176,7 @@ public final class StringArgument<C> extends CommandArgument<C, String> {
      * @return Created argument
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public static <C> @NonNull CommandArgument<C, String> greedyFlagYielding(final @NonNull String name) {
         return of(name, StringMode.GREEDY_FLAG_YIELDING);
     }
@@ -199,6 +202,7 @@ public final class StringArgument<C> extends CommandArgument<C, String> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public enum StringMode {
         SINGLE,
         QUOTED,
@@ -208,10 +212,12 @@ public final class StringArgument<C> extends CommandArgument<C, String> {
          *
          * @since 1.7.0
          */
+        @API(status = API.Status.STABLE, since = "1.7.0")
         GREEDY_FLAG_YIELDING
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, String> {
 
         private StringMode stringMode = StringMode.SINGLE;
@@ -248,6 +254,7 @@ public final class StringArgument<C> extends CommandArgument<C, String> {
          * @return Builder instance
          * @since 1.7.0
          */
+        @API(status = API.Status.STABLE, since = "1.7.0")
         public @NonNull @This Builder<C> greedyFlagYielding() {
             this.stringMode = StringMode.GREEDY_FLAG_YIELDING;
             return this;
@@ -304,6 +311,7 @@ public final class StringArgument<C> extends CommandArgument<C, String> {
 
 
     @SuppressWarnings("UnnecessaryLambda")
+    @API(status = API.Status.STABLE)
     public static final class StringParser<C> implements ArgumentParser<C, String> {
 
         private static final Pattern FLAG_PATTERN = Pattern.compile("(-[A-Za-z_\\-0-9])|(--[A-Za-z_\\-0-9]*)");
@@ -461,6 +469,7 @@ public final class StringArgument<C> extends CommandArgument<C, String> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class StringParseException extends ParserException {
 
         private static final long serialVersionUID = -8903115465005472945L;

cloud-core/src/main/java/cloud/commandframework/arguments/standard/StringArrayArgument.java

@@ -34,6 +34,7 @@ import java.util.List;
 import java.util.Queue;
 import java.util.function.BiFunction;
 import java.util.regex.Pattern;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -44,6 +45,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class StringArrayArgument<C> extends CommandArgument<C, String[]> {
 
     private StringArrayArgument(
@@ -95,6 +97,7 @@ public final class StringArrayArgument<C> extends CommandArgument<C, String[]> {
      * @return Created argument
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public static <C> @NonNull StringArrayArgument<C> of(
             final @NonNull String name,
             final boolean flagYielding,
@@ -140,6 +143,7 @@ public final class StringArrayArgument<C> extends CommandArgument<C, String[]> {
      * @return Created argument
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     public static <C> @NonNull StringArrayArgument<C> optional(
             final @NonNull String name,
             final boolean flagYielding,
@@ -160,6 +164,7 @@ public final class StringArrayArgument<C> extends CommandArgument<C, String[]> {
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.STABLE)
     public static final class StringArrayParser<C> implements ArgumentParser<C, String[]> {
 
         private static final Pattern FLAG_PATTERN = Pattern.compile("(-[A-Za-z_\\-0-9])|(--[A-Za-z_\\-0-9]*)");
@@ -179,6 +184,7 @@ public final class StringArrayArgument<C> extends CommandArgument<C, String[]> {
          * @param flagYielding Whether the parser should stop parsing when encountering a potential flag
          * @since 1.7.0
          */
+        @API(status = API.Status.STABLE, since = "1.7.0")
         public StringArrayParser(final boolean flagYielding) {
             this.flagYielding = flagYielding;
         }

cloud-core/src/main/java/cloud/commandframework/arguments/standard/UUIDArgument.java

@@ -37,10 +37,12 @@ import java.util.Objects;
 import java.util.Queue;
 import java.util.UUID;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class UUIDArgument<C> extends CommandArgument<C, UUID> {
 
     private UUIDArgument(
@@ -103,6 +105,7 @@ public final class UUIDArgument<C> extends CommandArgument<C, UUID> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> extends CommandArgument.Builder<C, UUID> {
 
         private Builder(final @NonNull String name) {
@@ -128,6 +131,7 @@ public final class UUIDArgument<C> extends CommandArgument<C, UUID> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class UUIDParser<C> implements ArgumentParser<C, UUID> {
 
         @Override
@@ -160,6 +164,7 @@ public final class UUIDArgument<C> extends CommandArgument<C, UUID> {
     }
 
 
+    @API(status = API.Status.STABLE)
     public static final class UUIDParseException extends ParserException {
 
         private static final long serialVersionUID = 6399602590976540023L;

cloud-core/src/main/java/cloud/commandframework/captions/Caption.java

@@ -24,11 +24,13 @@
 package cloud.commandframework.captions;
 
 import java.util.Objects;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * This is a reference to a caption and does not contain any message itself
  */
+@API(status = API.Status.STABLE)
 public final class Caption {
 
     private final String key;

cloud-core/src/main/java/cloud/commandframework/captions/CaptionRegistry.java

@@ -23,6 +23,7 @@
 //
 package cloud.commandframework.captions;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -30,6 +31,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public interface CaptionRegistry<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/captions/CaptionVariable.java

@@ -23,11 +23,13 @@
 //
 package cloud.commandframework.captions;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Key-value pair used to replace variables in captions
  */
+@API(status = API.Status.STABLE)
 public final class CaptionVariable {
 
     private final String key;

cloud-core/src/main/java/cloud/commandframework/captions/CaptionVariableReplacementHandler.java

@@ -23,11 +23,13 @@
 //
 package cloud.commandframework.captions;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Utility that replaces variables in captions
  */
+@API(status = API.Status.STABLE)
 public interface CaptionVariableReplacementHandler {
 
     /**

cloud-core/src/main/java/cloud/commandframework/captions/FactoryDelegatingCaptionRegistry.java

@@ -24,6 +24,7 @@
 package cloud.commandframework.captions;
 
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -31,6 +32,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public interface FactoryDelegatingCaptionRegistry<C> extends CaptionRegistry<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/captions/SimpleCaptionRegistry.java

@@ -26,6 +26,7 @@ package cloud.commandframework.captions;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -33,6 +34,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public class SimpleCaptionRegistry<C> implements FactoryDelegatingCaptionRegistry<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/captions/SimpleCaptionRegistryFactory.java

@@ -23,6 +23,7 @@
 //
 package cloud.commandframework.captions;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -30,6 +31,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class SimpleCaptionRegistryFactory<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/captions/SimpleCaptionVariableReplacementHandler.java

@@ -23,11 +23,13 @@
 //
 package cloud.commandframework.captions;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Simple implementation of {@link CaptionVariableReplacementHandler}
  */
+@API(status = API.Status.STABLE)
 public final class SimpleCaptionVariableReplacementHandler implements CaptionVariableReplacementHandler {
 
     @Override

cloud-core/src/main/java/cloud/commandframework/captions/StandardCaptionKeys.java

@@ -26,11 +26,13 @@ package cloud.commandframework.captions;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedList;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * {@link Caption} instances for messages in cloud-core
  */
+@API(status = API.Status.STABLE)
 public final class StandardCaptionKeys {
 
     private static final Collection<Caption> RECOGNIZED_CAPTIONS = new LinkedList<>();

cloud-core/src/main/java/cloud/commandframework/context/CommandContext.java

@@ -42,6 +42,7 @@ import java.util.LinkedList;
 import java.util.Map;
 import java.util.Optional;
 import java.util.function.Supplier;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -50,6 +51,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public class CommandContext<C> {
 
     private final CaptionVariableReplacementHandler captionVariableReplacementHandler;
@@ -71,6 +73,7 @@ public class CommandContext<C> {
      * @deprecated Provide a command manager instead of a caption registry
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.3.0")
     public CommandContext(final @NonNull C commandSender, final @NonNull CaptionRegistry<C> captionRegistry) {
         this(false, commandSender, captionRegistry);
     }
@@ -82,6 +85,7 @@ public class CommandContext<C> {
      * @param commandManager Command manager
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public CommandContext(final @NonNull C commandSender, final @NonNull CommandManager<C> commandManager) {
         this(false, commandSender, commandManager);
     }
@@ -89,12 +93,13 @@ public class CommandContext<C> {
     /**
      * Create a new command context instance
      *
-     * @param suggestions     Whether or not the context is created for command suggestions
+     * @param suggestions     Whether the context is created for command suggestions
      * @param commandSender   Sender of the command
      * @param captionRegistry Caption registry
      * @deprecated Provide a command manager instead of a caption registry
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.3.0")
     public CommandContext(
             final boolean suggestions,
             final @NonNull C commandSender,
@@ -110,11 +115,12 @@ public class CommandContext<C> {
     /**
      * Create a new command context instance
      *
-     * @param suggestions    Whether or not the context is created for command suggestions
+     * @param suggestions    Whether the context is created for command suggestions
      * @param commandSender  Sender of the command
      * @param commandManager Command manager
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public CommandContext(
             final boolean suggestions,
             final @NonNull C commandSender,
@@ -160,6 +166,7 @@ public class CommandContext<C> {
      * @return Command sender
      * @since 1.6.0
      */
+    @API(status = API.Status.STABLE, since = "1.6.0")
     public boolean hasPermission(final @NonNull CommandPermission permission) {
         return this.commandManager.hasPermission(this.commandSender, permission);
     }
@@ -171,6 +178,7 @@ public class CommandContext<C> {
      * @return Command sender
      * @since 1.6.0
      */
+    @API(status = API.Status.STABLE, since = "1.6.0")
     public boolean hasPermission(final @NonNull String permission) {
         return this.commandManager.hasPermission(this.commandSender, permission);
     }
@@ -229,6 +237,7 @@ public class CommandContext<C> {
      * @param <T>       Value type
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> void store(final @NonNull CloudKeyHolder<T> keyHolder, final @NonNull T value) {
         this.internalStorage.put(keyHolder.getKey(), value);
     }
@@ -244,6 +253,7 @@ public class CommandContext<C> {
      * @param <T>   Value type
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public <T> void set(final @NonNull String key, final @Nullable T value) {
         if (value != null) {
             this.store(key, value);
@@ -263,6 +273,7 @@ public class CommandContext<C> {
      * @param <T>   Value type
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> void set(final @NonNull CloudKey<T> key, final @Nullable T value) {
         if (value != null) {
             this.store(key, value);
@@ -278,6 +289,7 @@ public class CommandContext<C> {
      * @return Whether the context has a value for the provided key
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public boolean contains(final @NonNull String key) {
         return this.contains(SimpleCloudKey.of(key));
     }
@@ -289,6 +301,7 @@ public class CommandContext<C> {
      * @return Whether the context has a value for the provided key
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public boolean contains(final @NonNull CloudKey<?> key) {
         return this.internalStorage.containsKey(key);
     }
@@ -299,6 +312,7 @@ public class CommandContext<C> {
      * @return An immutable copy of this command context as a map
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public @NonNull Map<@NonNull String, @Nullable ?> asMap() {
         final Map<String, Object> values = new HashMap<>();
         this.internalStorage.forEach((key, value) -> values.put(key.getName(), value));
@@ -332,6 +346,7 @@ public class CommandContext<C> {
      * @return Value
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @NonNull Optional<T> getOptional(final @NonNull CloudKey<T> key) {
         final Object value = this.internalStorage.get(key);
         if (value != null) {
@@ -365,6 +380,7 @@ public class CommandContext<C> {
      * @since 1.4.0
      */
     @SuppressWarnings("unused")
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @NonNull Optional<T> getOptional(final @NonNull CloudKeyHolder<T> keyHolder) {
         final Object value = this.internalStorage.get(keyHolder.getKey());
         if (value != null) {
@@ -390,6 +406,7 @@ public class CommandContext<C> {
      * @param key Key to remove
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public void remove(final @NonNull CloudKey<?> key) {
         this.internalStorage.remove(key);
     }
@@ -423,6 +440,7 @@ public class CommandContext<C> {
      * @since 1.4.0
      */
     @SuppressWarnings({"unchecked", "TypeParameterUnusedInFormals"})
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @NonNull T get(final @NonNull CloudKey<T> key) {
         final Object value = this.internalStorage.get(key);
         if (value == null) {
@@ -454,6 +472,7 @@ public class CommandContext<C> {
      * @throws NullPointerException If no such value is stored
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @NonNull T get(final @NonNull CloudKeyHolder<T> keyHolder) {
         return this.get(keyHolder.getKey());
     }
@@ -497,6 +516,7 @@ public class CommandContext<C> {
      * @return Argument, or supplied default value
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @Nullable T getOrDefault(
             final @NonNull CloudKey<T> key,
             final @Nullable T defaultValue
@@ -513,6 +533,7 @@ public class CommandContext<C> {
      * @return Argument, or supplied default value
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public <T> @Nullable T getOrSupplyDefault(
             final @NonNull String key,
             final @NonNull Supplier<@Nullable T> defaultSupplier
@@ -529,6 +550,7 @@ public class CommandContext<C> {
      * @return Argument, or supplied default value
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public <T> @Nullable T getOrSupplyDefault(
             final @NonNull CloudKey<T> key,
             final @NonNull Supplier<@Nullable T> defaultSupplier
@@ -551,6 +573,7 @@ public class CommandContext<C> {
      * @return {@link #getRawInput()} joined with {@code " "} as the delimiter
      * @since 1.1.0
      */
+    @API(status = API.Status.STABLE, since = "1.1.0")
     public @NonNull String getRawInputJoined() {
         return String.join(" ", this.getRawInput());
     }
@@ -593,6 +616,7 @@ public class CommandContext<C> {
      * @return Currently parsing {@link CommandArgument} or {@code null}
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public @Nullable CommandArgument<C, ?> getCurrentArgument() {
         return this.currentArgument;
     }
@@ -605,6 +629,7 @@ public class CommandContext<C> {
      * @param argument Currently parsing {@link CommandArgument} or {@code null}
      * @since 1.2.0
      */
+    @API(status = API.Status.STABLE, since = "1.2.0")
     public void setCurrentArgument(final @Nullable CommandArgument<C, ?> argument) {
         this.currentArgument = argument;
     }
@@ -618,7 +643,7 @@ public class CommandContext<C> {
      * @return Optional that may contain the created value
      * @since 1.3.0
      */
-    @SuppressWarnings("unchecked")
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public <@NonNull T> @NonNull Optional<T> inject(final @NonNull Class<T> clazz) {
         if (this.commandManager == null) {
             throw new UnsupportedOperationException(
@@ -636,6 +661,7 @@ public class CommandContext<C> {
      * <p>
      * The times are measured in nanoseconds.
      */
+    @API(status = API.Status.STABLE)
     public static final class ArgumentTiming {
 
         private long start;
@@ -647,7 +673,7 @@ public class CommandContext<C> {
          *
          * @param start   Start time (in nanoseconds)
          * @param end     End time (in nanoseconds)
-         * @param success Whether or not the argument was parsed successfully
+         * @param success Whether the argument was parsed successfully
          */
         public ArgumentTiming(final long start, final long end, final boolean success) {
             this.start = start;
@@ -690,7 +716,7 @@ public class CommandContext<C> {
          * Set the end time
          *
          * @param end     End time (in nanoseconds)
-         * @param success Whether or not the argument was parsed successfully
+         * @param success Whether the argument was parsed successfully
          */
         public void setEnd(final long end, final boolean success) {
             this.end = end;
@@ -707,7 +733,7 @@ public class CommandContext<C> {
         }
 
         /**
-         * Check whether or not the value was parsed successfully
+         * Check whether the value was parsed successfully
          *
          * @return {@code true} if the value was parsed successfully, {@code false} if not
          */

cloud-core/src/main/java/cloud/commandframework/context/CommandContextFactory.java

@@ -25,6 +25,7 @@ package cloud.commandframework.context;
 
 import cloud.commandframework.CommandManager;
 import cloud.commandframework.captions.CaptionRegistry;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender
  */
+@API(status = API.Status.STABLE)
 public interface CommandContextFactory<C> {
 
     /**
@@ -44,6 +46,7 @@ public interface CommandContextFactory<C> {
      * @deprecated Provide a command manager instead of a caption registry
      */
     @Deprecated
+    @API(status = API.Status.DEPRECATED, since = "1.3.0")
     @NonNull CommandContext<C> create(
             boolean suggestions,
             @NonNull C sender,
@@ -59,6 +62,7 @@ public interface CommandContextFactory<C> {
      * @return Command context
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     @NonNull CommandContext<C> create(
             boolean suggestions,
             @NonNull C sender,

cloud-core/src/main/java/cloud/commandframework/context/StandardCommandContextFactory.java

@@ -25,9 +25,11 @@ package cloud.commandframework.context;
 
 import cloud.commandframework.CommandManager;
 import cloud.commandframework.captions.CaptionRegistry;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 @SuppressWarnings("deprecation")
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 public final class StandardCommandContextFactory<C> implements CommandContextFactory<C> {
 
     @Override

cloud-core/src/main/java/cloud/commandframework/exceptions/AmbiguousNodeException.java

@@ -28,6 +28,7 @@ import cloud.commandframework.arguments.CommandArgument;
 import cloud.commandframework.context.CommandContext;
 import java.util.Iterator;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -37,6 +38,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * is detected.
  */
 @SuppressWarnings({"unused", "serial"})
+@API(status = API.Status.STABLE)
 public final class AmbiguousNodeException extends IllegalStateException {
 
     private static final long serialVersionUID = -200207173805584709L;
@@ -51,6 +53,7 @@ public final class AmbiguousNodeException extends IllegalStateException {
      * @param ambiguousNode Node that caused exception
      * @param children      All children of the parent
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public AmbiguousNodeException(
             final @Nullable CommandArgument<?, ?> parentNode,
             final @NonNull CommandArgument<?, ?> ambiguousNode,

cloud-core/src/main/java/cloud/commandframework/exceptions/ArgumentParseException.java

@@ -25,8 +25,10 @@ package cloud.commandframework.exceptions;
 
 import cloud.commandframework.arguments.CommandArgument;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
+@API(status = API.Status.STABLE)
 public class ArgumentParseException extends CommandParseException {
 
     private static final long serialVersionUID = -4385446899439587461L;
@@ -39,6 +41,7 @@ public class ArgumentParseException extends CommandParseException {
      * @param commandSender Command sender
      * @param currentChain  Chain leading up to the exception
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public ArgumentParseException(
             final @NonNull Throwable throwable,
             final @NonNull Object commandSender,

cloud-core/src/main/java/cloud/commandframework/exceptions/CommandExecutionException.java

@@ -24,6 +24,7 @@
 package cloud.commandframework.exceptions;
 
 import cloud.commandframework.context.CommandContext;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -33,6 +34,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @since 1.2.0
  */
 @SuppressWarnings("serial")
+@API(status = API.Status.STABLE, since = "1.2.0")
 public class CommandExecutionException extends IllegalArgumentException {
 
     private static final long serialVersionUID = -4785446899438294661L;
@@ -43,6 +45,7 @@ public class CommandExecutionException extends IllegalArgumentException {
      *
      * @param cause Exception thrown during the execution of a command handler
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public CommandExecutionException(final @NonNull Throwable cause) {
         this(cause, null);
     }
@@ -54,6 +57,7 @@ public class CommandExecutionException extends IllegalArgumentException {
      * @param commandContext Command context
      * @since 1.4.0
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*", since = "1.4.0")
     public CommandExecutionException(final @NonNull Throwable cause, final @Nullable CommandContext<?> commandContext) {
         super(cause);
         this.commandContext = commandContext;
@@ -65,6 +69,7 @@ public class CommandExecutionException extends IllegalArgumentException {
      * @return Command
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public @Nullable CommandContext<?> getCommandContext() {
         return this.commandContext;
     }

cloud-core/src/main/java/cloud/commandframework/exceptions/CommandParseException.java

@@ -26,12 +26,14 @@ package cloud.commandframework.exceptions;
 import cloud.commandframework.arguments.CommandArgument;
 import java.util.Collections;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Exception thrown when parsing user input into a command
  */
 @SuppressWarnings({"unused", "serial"})
+@API(status = API.Status.STABLE)
 public class CommandParseException extends IllegalArgumentException {
 
     private static final long serialVersionUID = -2415981126382517435L;
@@ -44,6 +46,7 @@ public class CommandParseException extends IllegalArgumentException {
      * @param commandSender Sender who executed the command
      * @param currentChain  Chain leading up to the exception
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     protected CommandParseException(
             final @NonNull Object commandSender,
             final @NonNull List<CommandArgument<?, ?>> currentChain

cloud-core/src/main/java/cloud/commandframework/exceptions/InvalidCommandSenderException.java

@@ -26,6 +26,7 @@ package cloud.commandframework.exceptions;
 import cloud.commandframework.Command;
 import cloud.commandframework.arguments.CommandArgument;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -33,6 +34,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * Exception thrown when an invalid command sender tries to execute a command
  */
 @SuppressWarnings("serial")
+@API(status = API.Status.STABLE)
 public final class InvalidCommandSenderException extends CommandParseException {
 
     private static final long serialVersionUID = 7372142477529875598L;
@@ -46,6 +48,7 @@ public final class InvalidCommandSenderException extends CommandParseException {
      * @param requiredSender The sender type that is required
      * @param currentChain   Chain leading up to the exception
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public InvalidCommandSenderException(
             final @NonNull Object commandSender,
             final @NonNull Class<?> requiredSender,
@@ -63,6 +66,7 @@ public final class InvalidCommandSenderException extends CommandParseException {
      * @param command        Command
      * @since 1.4.0
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*", since = "1.4.0")
     public InvalidCommandSenderException(
             final @NonNull Object commandSender,
             final @NonNull Class<?> requiredSender,
@@ -98,6 +102,7 @@ public final class InvalidCommandSenderException extends CommandParseException {
      * @return Command
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public @Nullable Command<?> getCommand() {
         return this.command;
     }

cloud-core/src/main/java/cloud/commandframework/exceptions/InvalidSyntaxException.java

@@ -25,12 +25,14 @@ package cloud.commandframework.exceptions;
 
 import cloud.commandframework.arguments.CommandArgument;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Exception sent when a command sender inputs invalid command syntax
  */
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public class InvalidSyntaxException extends CommandParseException {
 
     private static final long serialVersionUID = -4183356059293785202L;
@@ -43,6 +45,7 @@ public class InvalidSyntaxException extends CommandParseException {
      * @param commandSender Sender that sent the command
      * @param currentChain  Chain leading up to issue
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public InvalidSyntaxException(
             final @NonNull String correctSyntax,
             final @NonNull Object commandSender,

cloud-core/src/main/java/cloud/commandframework/exceptions/NoCommandInLeafException.java

@@ -25,6 +25,7 @@ package cloud.commandframework.exceptions;
 
 import cloud.commandframework.Command;
 import cloud.commandframework.arguments.CommandArgument;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * that is registered as a leaf node, does not contain an owning {@link Command}
  */
 @SuppressWarnings({"unused", "serial"})
+@API(status = API.Status.STABLE)
 public final class NoCommandInLeafException extends IllegalStateException {
 
     private static final long serialVersionUID = 3373529875213310821L;
@@ -42,6 +44,7 @@ public final class NoCommandInLeafException extends IllegalStateException {
      *
      * @param commandArgument Command argument that caused the exception
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public NoCommandInLeafException(final @NonNull CommandArgument<?, ?> commandArgument) {
         super(String.format("Leaf node '%s' does not have associated owning command", commandArgument.getName()));
         this.commandArgument = commandArgument;

cloud-core/src/main/java/cloud/commandframework/exceptions/NoPermissionException.java

@@ -27,6 +27,7 @@ import cloud.commandframework.Command;
 import cloud.commandframework.arguments.CommandArgument;
 import cloud.commandframework.permission.CommandPermission;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -34,6 +35,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * to execute a {@link Command}
  */
 @SuppressWarnings({"unused", "serial"})
+@API(status = API.Status.STABLE)
 public class NoPermissionException extends CommandParseException {
 
     private static final long serialVersionUID = 7103413337750692843L;
@@ -46,6 +48,7 @@ public class NoPermissionException extends CommandParseException {
      * @param commandSender     Command sender
      * @param currentChain      Chain leading up to the exception
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public NoPermissionException(
             final @NonNull CommandPermission missingPermission,
             final @NonNull Object commandSender,

cloud-core/src/main/java/cloud/commandframework/exceptions/NoSuchCommandException.java

@@ -25,6 +25,7 @@ package cloud.commandframework.exceptions;
 
 import cloud.commandframework.arguments.CommandArgument;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * a command that doesn't exist
  */
 @SuppressWarnings("unused")
+@API(status = API.Status.STABLE)
 public final class NoSuchCommandException extends CommandParseException {
 
     private static final long serialVersionUID = -7775865652882764771L;
@@ -44,6 +46,7 @@ public final class NoSuchCommandException extends CommandParseException {
      * @param currentChain  Chain leading up to the exception
      * @param command       Entered command (following the command chain)
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public NoSuchCommandException(
             final @NonNull Object commandSender,
             final @NonNull List<CommandArgument<?, ?>> currentChain,

cloud-core/src/main/java/cloud/commandframework/exceptions/parsing/NoInputProvidedException.java

@@ -25,6 +25,7 @@ package cloud.commandframework.exceptions.parsing;
 
 import cloud.commandframework.captions.StandardCaptionKeys;
 import cloud.commandframework.context.CommandContext;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @since 1.1.0
  */
+@API(status = API.Status.STABLE, since = "1.1.0")
 public class NoInputProvidedException extends ParserException {
 
     private static final long serialVersionUID = 3485754951593709559L;

cloud-core/src/main/java/cloud/commandframework/exceptions/parsing/NumberParseException.java

@@ -26,8 +26,10 @@ package cloud.commandframework.exceptions.parsing;
 import cloud.commandframework.captions.CaptionVariable;
 import cloud.commandframework.captions.StandardCaptionKeys;
 import cloud.commandframework.context.CommandContext;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
+@API(status = API.Status.STABLE)
 public abstract class NumberParseException extends ParserException {
 
     private static final long serialVersionUID = 3018775374056029797L;

cloud-core/src/main/java/cloud/commandframework/exceptions/parsing/ParserException.java

@@ -27,9 +27,11 @@ import cloud.commandframework.captions.Caption;
 import cloud.commandframework.captions.CaptionVariable;
 import cloud.commandframework.context.CommandContext;
 import java.util.Arrays;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 @SuppressWarnings("serial")
+@API(status = API.Status.STABLE)
 public class ParserException extends IllegalArgumentException {
 
     private static final long serialVersionUID = -4409795575435072170L;
@@ -64,6 +66,7 @@ public class ParserException extends IllegalArgumentException {
      * @return The caption
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public @NonNull Caption errorCaption() {
         return this.errorCaption;
     }
@@ -75,6 +78,7 @@ public class ParserException extends IllegalArgumentException {
      * @return The caption variables
      * @since 1.4.0
      */
+    @API(status = API.Status.STABLE, since = "1.4.0")
     public @NonNull CaptionVariable @NonNull [] captionVariables() {
         return Arrays.copyOf(this.captionVariables, this.captionVariables.length);
     }

cloud-core/src/main/java/cloud/commandframework/execution/AsynchronousCommandExecutionCoordinator.java

@@ -36,6 +36,7 @@ import java.util.concurrent.Executor;
 import java.util.concurrent.ForkJoinPool;
 import java.util.function.Consumer;
 import java.util.function.Function;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.common.returnsreceiver.qual.This;
@@ -45,6 +46,7 @@ import org.checkerframework.common.returnsreceiver.qual.This;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class AsynchronousCommandExecutionCoordinator<C> extends CommandExecutionCoordinator<C> {
 
     private final CommandManager<C> commandManager;
@@ -128,6 +130,7 @@ public final class AsynchronousCommandExecutionCoordinator<C> extends CommandExe
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.STABLE)
     public static final class Builder<C> {
 
         private Executor executor = null;

cloud-core/src/main/java/cloud/commandframework/execution/CommandExecutionCoordinator.java

@@ -33,6 +33,7 @@ import java.util.Objects;
 import java.util.Queue;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Function;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -44,6 +45,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public abstract class CommandExecutionCoordinator<C> {
 
     private final CommandTree<C> commandTree;
@@ -95,6 +97,7 @@ public abstract class CommandExecutionCoordinator<C> {
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     public static final class SimpleCoordinator<C> extends
             CommandExecutionCoordinator<C> {
 

cloud-core/src/main/java/cloud/commandframework/execution/CommandExecutionHandler.java

@@ -28,6 +28,7 @@ import cloud.commandframework.context.CommandContext;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -39,6 +40,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  * @param <C> Command sender type
  */
 @FunctionalInterface
+@API(status = API.Status.STABLE)
 public interface CommandExecutionHandler<C> {
 
     /**
@@ -48,6 +50,7 @@ public interface CommandExecutionHandler<C> {
      * @return command execution handler that does nothing
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     static <C> @NonNull CommandExecutionHandler<C> noOpCommandExecutionHandler() {
         return new NullCommandExecutionHandler<>();
     }
@@ -64,6 +67,7 @@ public interface CommandExecutionHandler<C> {
      * @return multicast-delegate command execution handler
      * @since 1.7.0
      */
+    @API(status = API.Status.STABLE, since = "1.7.0")
     static <C> @NonNull CommandExecutionHandler<C> delegatingExecutionHandler(
             final List<CommandExecutionHandler<C>> handlers
     ) {
@@ -84,6 +88,7 @@ public interface CommandExecutionHandler<C> {
      * @return future that completes when the command has finished execution
      * @since 1.6.0
      */
+    @API(status = API.Status.STABLE, since = "1.6.0")
     default CompletableFuture<@Nullable Void> executeFuture(@NonNull CommandContext<C> commandContext) {
         final CompletableFuture<Void> future = new CompletableFuture<>();
         try {
@@ -101,6 +106,7 @@ public interface CommandExecutionHandler<C> {
      *
      * @param <C> Command sender type
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     class NullCommandExecutionHandler<C> implements CommandExecutionHandler<C> {
 
         @Override
@@ -117,6 +123,7 @@ public interface CommandExecutionHandler<C> {
      * @since 1.6.0
      */
     @FunctionalInterface
+    @API(status = API.Status.STABLE, since = "1.6.0")
     interface FutureCommandExecutionHandler<C> extends CommandExecutionHandler<C> {
 
         @Override
@@ -140,6 +147,7 @@ public interface CommandExecutionHandler<C> {
      * @see #delegatingExecutionHandler(List)
      * @since 1.7.0
      */
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*", since = "1.7.0")
     final class MulticastDelegateFutureCommandExecutionHandler<C> implements FutureCommandExecutionHandler<C> {
 
         private final List<CommandExecutionHandler<C>> handlers;

cloud-core/src/main/java/cloud/commandframework/execution/CommandResult.java

@@ -24,6 +24,7 @@
 package cloud.commandframework.execution;
 
 import cloud.commandframework.context.CommandContext;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -31,6 +32,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public class CommandResult<C> {
 
     private final CommandContext<C> commandContext;

cloud-core/src/main/java/cloud/commandframework/execution/CommandSuggestionProcessor.java

@@ -26,6 +26,7 @@ package cloud.commandframework.execution;
 import cloud.commandframework.execution.preprocessor.CommandPreprocessingContext;
 import java.util.List;
 import java.util.function.BiFunction;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -33,6 +34,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public interface CommandSuggestionProcessor<C> extends
         BiFunction<@NonNull CommandPreprocessingContext<C>, @NonNull List<String>, @NonNull List<String>> {
 

cloud-core/src/main/java/cloud/commandframework/execution/FilteringCommandSuggestionProcessor.java

@@ -26,13 +26,15 @@ package cloud.commandframework.execution;
 import cloud.commandframework.execution.preprocessor.CommandPreprocessingContext;
 import java.util.LinkedList;
 import java.util.List;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
- * Command suggestions processor that checks the input queue head and filters based on that
+ * Command suggestion processor that checks the input queue head and filters based on that
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class FilteringCommandSuggestionProcessor<C> implements CommandSuggestionProcessor<C> {
 
     @Override

cloud-core/src/main/java/cloud/commandframework/execution/postprocessor/AcceptingCommandPostprocessor.java

@@ -23,6 +23,7 @@
 //
 package cloud.commandframework.execution.postprocessor;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -31,6 +32,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 public final class AcceptingCommandPostprocessor<C> implements CommandPostprocessor<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/execution/postprocessor/CommandPostprocessingContext.java

@@ -26,6 +26,7 @@ package cloud.commandframework.execution.postprocessor;
 import cloud.commandframework.Command;
 import cloud.commandframework.context.CommandContext;
 import java.util.Objects;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -33,6 +34,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class CommandPostprocessingContext<C> {
 
     private final CommandContext<@NonNull C> commandContext;

cloud-core/src/main/java/cloud/commandframework/execution/postprocessor/CommandPostprocessor.java

@@ -24,12 +24,14 @@
 package cloud.commandframework.execution.postprocessor;
 
 import cloud.commandframework.services.types.ConsumerService;
+import org.apiguardian.api.API;
 
 /**
  * Command postprocessor that acts on commands before execution
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public interface CommandPostprocessor<C> extends ConsumerService<CommandPostprocessingContext<C>> {
 
 }

cloud-core/src/main/java/cloud/commandframework/execution/preprocessor/AcceptingCommandPreprocessor.java

@@ -23,6 +23,7 @@
 //
 package cloud.commandframework.execution.preprocessor;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -31,6 +32,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 public final class AcceptingCommandPreprocessor<C> implements CommandPreprocessor<C> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/execution/preprocessor/CommandPreprocessingContext.java

@@ -26,6 +26,7 @@ package cloud.commandframework.execution.preprocessor;
 import cloud.commandframework.context.CommandContext;
 import java.util.LinkedList;
 import java.util.Objects;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -33,6 +34,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public final class CommandPreprocessingContext<C> {
 
     private final CommandContext<C> commandContext;

cloud-core/src/main/java/cloud/commandframework/execution/preprocessor/CommandPreprocessor.java

@@ -24,6 +24,7 @@
 package cloud.commandframework.execution.preprocessor;
 
 import cloud.commandframework.services.types.ConsumerService;
+import org.apiguardian.api.API;
 
 /**
  * Command preprocessor that gets to act on command input
@@ -34,6 +35,7 @@ import cloud.commandframework.services.types.ConsumerService;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public interface CommandPreprocessor<C> extends ConsumerService<CommandPreprocessingContext<C>> {
 
 }

cloud-core/src/main/java/cloud/commandframework/extra/confirmation/CommandConfirmationManager.java

@@ -37,6 +37,7 @@ import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Consumer;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -51,6 +52,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  *
  * @param <C> Command sender type
  */
+@API(status = API.Status.STABLE)
 public class CommandConfirmationManager<C> {
 
     /**
@@ -71,6 +73,7 @@ public class CommandConfirmationManager<C> {
      *
      * @since 1.3.0
      */
+    @API(status = API.Status.STABLE, since = "1.3.0")
     public static final CommandMeta.Key<Boolean> META_CONFIRMATION_REQUIRED = CommandMeta.Key.of(
             Boolean.class,
             "cloud:require_confirmation",

cloud-core/src/main/java/cloud/commandframework/internal/CommandInputTokenizer.java

@@ -25,6 +25,7 @@ package cloud.commandframework.internal;
 
 import java.util.LinkedList;
 import java.util.StringTokenizer;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * at every blank space. If the input string ends with a blank space, a trailing
  * empty string will be added to the token list
  */
+@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
 public final class CommandInputTokenizer {
 
     private static final String DELIMITER = " ";

cloud-core/src/main/java/cloud/commandframework/internal/CommandRegistrationHandler.java

@@ -24,6 +24,7 @@
 package cloud.commandframework.internal;
 
 import cloud.commandframework.Command;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * the target platform does not have its own concept of commands
  */
 @FunctionalInterface
+@API(status = API.Status.STABLE)
 public interface CommandRegistrationHandler {
 
     /**
@@ -52,6 +54,8 @@ public interface CommandRegistrationHandler {
      */
     boolean registerCommand(@NonNull Command<?> command);
 
+
+    @API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
     final class NullCommandRegistrationHandler implements CommandRegistrationHandler {
 
         private NullCommandRegistrationHandler() {

cloud-core/src/main/java/cloud/commandframework/keys/CloudKey.java

@@ -24,6 +24,7 @@
 package cloud.commandframework.keys;
 
 import io.leangen.geantyref.TypeToken;
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @param <T> The type of the key
  * @since 1.4.0
  */
+@API(status = API.Status.STABLE, since = "1.4.0")
 public interface CloudKey<T> {
 
     /**

cloud-core/src/main/java/cloud/commandframework/keys/CloudKeyHolder.java

@@ -23,6 +23,7 @@
 //
 package cloud.commandframework.keys;
 
+import org.apiguardian.api.API;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
@@ -32,6 +33,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * @since 1.4.0
  */
 @FunctionalInterface
+@API(status = API.Status.STABLE, since = "1.4.0")
 public interface CloudKeyHolder<T> {
 
     /**