diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..2ca3795
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,40 @@
+# Automatically build the project and run any configured tests for every push
+# and submitted pull request. This can help catch issues that only occur on
+# certain platforms or Java versions, and provides a first line of defence
+# against bad commits.
+
+name: build
+on: [pull_request, push]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        # Use these Java versions
+        java: [
+          17,    # Current Java LTS & minimum supported by Minecraft
+        ]
+        # and run on both Linux and Windows
+        os: [ubuntu-22.04, windows-2022]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: checkout repository
+        uses: actions/checkout@v3
+      - name: validate gradle wrapper
+        uses: gradle/wrapper-validation-action@v1
+      - name: setup jdk ${{ matrix.java }}
+        uses: actions/setup-java@v3
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'microsoft'
+      - name: make gradle wrapper executable
+        if: ${{ runner.os != 'Windows' }}
+        run: chmod +x ./gradlew
+      - name: build
+        run: ./gradlew build
+      - name: capture build artifacts
+        if: ${{ runner.os == 'Linux' && matrix.java == '17' }} # Only upload artifacts built from latest java on one OS
+        uses: actions/upload-artifact@v3
+        with:
+          name: Artifacts
+          path: build/libs/
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c476faf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,40 @@
+# gradle
+
+.gradle/
+build/
+out/
+classes/
+
+# eclipse
+
+*.launch
+
+# idea
+
+.idea/
+*.iml
+*.ipr
+*.iws
+
+# vscode
+
+.settings/
+.vscode/
+bin/
+.classpath
+.project
+
+# macos
+
+*.DS_Store
+
+# fabric
+
+run/
+
+# java
+
+hs_err_*.log
+replay_*.log
+*.hprof
+*.jfr
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..ae2916d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Moulberry
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..5774f13
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,85 @@
+plugins {
+	id 'fabric-loom' version '1.6-SNAPSHOT'
+    id "com.vanniktech.maven.publish" version "0.28.0"
+}
+
+version = "1.0.0"
+group = project.maven_group
+
+base {
+	archivesName = project.archives_base_name
+}
+
+repositories {
+    maven {
+        url = "https://jitpack.io"
+    }
+    mavenCentral()
+}
+
+dependencies {
+	// To change the versions see the gradle.properties file
+	minecraft "com.mojang:minecraft:${project.minecraft_version}"
+    mappings loom.officialMojangMappings()
+    modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
+
+}
+
+tasks.withType(JavaCompile).configureEach {
+	it.options.release = 17
+}
+
+java {
+	// Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+	// if it is present.
+	// If you remove this line, sources will not be generated.
+	withSourcesJar()
+
+	sourceCompatibility = JavaVersion.VERSION_17
+	targetCompatibility = JavaVersion.VERSION_17
+}
+
+jar {
+    manifest {
+        attributes(
+            "Fabric-Loom-Remap": "true"
+        )
+    }
+}
+
+import com.vanniktech.maven.publish.JavaLibrary
+import com.vanniktech.maven.publish.JavadocJar
+import com.vanniktech.maven.publish.SonatypeHost
+
+mavenPublishing {
+    configure(new JavaLibrary(new JavadocJar.Javadoc(), true))
+
+    publishToMavenCentral(SonatypeHost.CENTRAL_PORTAL)
+
+    signAllPublications()
+
+    coordinates("com.moulberry", "mixinconstraints", version)
+
+    pom {
+        name = 'MixinConstraints'
+        description = 'Library to enable/disable mixins using annotations'
+        url = "https://github.com/Moulberry/MixinConstraints"
+
+        licenses {
+            license {
+                name = 'MIT License'
+                url = 'https://opensource.org/license/mit'
+            }
+        }
+        developers {
+            developer {
+                name = 'Moulberry'
+            }
+        }
+        scm {
+            url = "https://github.com/Moulberry/MixinConstraints/"
+            connection = "scm:git:git://github.com/Moulberry/MixinConstraints.git"
+            developerConnection = "scm:git:ssh://git@github.com/Moulberry/MixinConstraints.git"
+        }
+    }
+}
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..e179af1
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,16 @@
+# Done to increase the memory available to gradle.
+org.gradle.jvmargs=-Xmx1G
+org.gradle.parallel=true
+
+# Fabric Properties
+# check these on https://fabricmc.net/develop
+minecraft_version=1.20.6
+yarn_mappings=1.20.6+build.1
+loader_version=0.15.11
+
+# Mod Properties
+maven_group=com.moulberry.axiomclientapi
+archives_base_name=axiomclientapi
+
+# Dependencies
+fabric_version=0.98.0+1.20.6
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..033e24c
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..a80b22c
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..fcb6fca
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..6689b85
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..3198616
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,11 @@
+pluginManagement {
+	repositories {
+		maven {
+			name = 'Fabric'
+			url = 'https://maven.fabricmc.net/'
+		}
+		mavenCentral()
+		gradlePluginPortal()
+	}
+}
+
diff --git a/src/main/java/com/moulberry/mixinconstraints/ConstraintsMixinPlugin.java b/src/main/java/com/moulberry/mixinconstraints/ConstraintsMixinPlugin.java
new file mode 100644
index 0000000..1b31b0e
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/ConstraintsMixinPlugin.java
@@ -0,0 +1,51 @@
+package com.moulberry.mixinconstraints;
+
+import com.moulberry.mixinconstraints.mixin.MixinConstraintsBootstrap;
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.mixin.extensibility.IMixinConfigPlugin;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+import java.util.List;
+import java.util.Set;
+
+public class ConstraintsMixinPlugin implements IMixinConfigPlugin {
+
+    private String mixinPackage;
+
+    @Override
+    public boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
+        if (this.mixinPackage != null && !mixinClassName.startsWith(this.mixinPackage)) {
+            return true;
+        }
+        return MixinConstraints.shouldApplyMixin(targetClassName, mixinClassName);
+    }
+
+    @Override
+    public void onLoad(String mixinPackage) {
+        this.mixinPackage = mixinPackage;
+        MixinConstraintsBootstrap.init(mixinPackage);
+    }
+
+    @Override
+    public String getRefMapperConfig() {
+        return null;
+    }
+
+
+    @Override
+    public void acceptTargets(Set<String> myTargets, Set<String> otherTargets) {
+    }
+
+    @Override
+    public List<String> getMixins() {
+        return null;
+    }
+
+    @Override
+    public void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+    }
+
+    @Override
+    public void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+    }
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/MixinConstraints.java b/src/main/java/com/moulberry/mixinconstraints/MixinConstraints.java
new file mode 100644
index 0000000..4401657
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/MixinConstraints.java
@@ -0,0 +1,43 @@
+package com.moulberry.mixinconstraints;
+
+import com.moulberry.mixinconstraints.checker.AnnotationChecker;
+import org.objectweb.asm.tree.AnnotationNode;
+import org.objectweb.asm.tree.ClassNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.spongepowered.asm.service.MixinService;
+
+import java.io.IOException;
+
+public class MixinConstraints {
+
+    public static final Logger LOGGER = LoggerFactory.getLogger("mixinconstraints");
+    public static boolean VERBOSE = "true".equals(System.getProperty("mixinconstraints.verbose"));
+
+    public static boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
+        try {
+            // Use classNode instead of Class.forName to avoid loading at the wrong time
+            ClassNode classNode = MixinService.getService().getBytecodeProvider().getClassNode(mixinClassName);
+
+            if (VERBOSE) {
+                LOGGER.info("Checking class-level mixin constraints for {}", mixinClassName);
+            }
+
+            if (classNode.visibleAnnotations != null) {
+                for (AnnotationNode node : classNode.visibleAnnotations) {
+                    if (!AnnotationChecker.checkAnnotationNode(node)) {
+                        if (VERBOSE) {
+                            LOGGER.warn("Preventing application of mixin {} due to failing constraint", mixinClassName);
+                        }
+                        return false;
+                    }
+                }
+            }
+
+            return true;
+        } catch (ClassNotFoundException | IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/annotations/IfDevEnvironment.java b/src/main/java/com/moulberry/mixinconstraints/annotations/IfDevEnvironment.java
new file mode 100644
index 0000000..2a6912e
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/annotations/IfDevEnvironment.java
@@ -0,0 +1,14 @@
+package com.moulberry.mixinconstraints.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD})
+public @interface IfDevEnvironment {
+
+    boolean negate() default false;
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/annotations/IfMinecraftVersion.java b/src/main/java/com/moulberry/mixinconstraints/annotations/IfMinecraftVersion.java
new file mode 100644
index 0000000..03b3969
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/annotations/IfMinecraftVersion.java
@@ -0,0 +1,16 @@
+package com.moulberry.mixinconstraints.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD})
+public @interface IfMinecraftVersion {
+
+    String minVersion() default "";
+    String maxVersion() default "";
+    boolean negate() default false;
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/annotations/IfModAbsent.java b/src/main/java/com/moulberry/mixinconstraints/annotations/IfModAbsent.java
new file mode 100644
index 0000000..80e6c8f
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/annotations/IfModAbsent.java
@@ -0,0 +1,17 @@
+package com.moulberry.mixinconstraints.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD})
+public @interface IfModAbsent {
+
+    String value();
+    String[] aliases() default {};
+    String minVersion() default "";
+    String maxVersion() default "";
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/annotations/IfModLoaded.java b/src/main/java/com/moulberry/mixinconstraints/annotations/IfModLoaded.java
new file mode 100644
index 0000000..1209a53
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/annotations/IfModLoaded.java
@@ -0,0 +1,17 @@
+package com.moulberry.mixinconstraints.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD})
+public @interface IfModLoaded {
+
+    String value();
+    String[] aliases() default {};
+    String minVersion() default "";
+    String maxVersion() default "";
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/checker/AnnotationChecker.java b/src/main/java/com/moulberry/mixinconstraints/checker/AnnotationChecker.java
new file mode 100644
index 0000000..d9339d7
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/checker/AnnotationChecker.java
@@ -0,0 +1,113 @@
+package com.moulberry.mixinconstraints.checker;
+
+import com.moulberry.mixinconstraints.MixinConstraints;
+import com.moulberry.mixinconstraints.annotations.IfDevEnvironment;
+import com.moulberry.mixinconstraints.annotations.IfMinecraftVersion;
+import com.moulberry.mixinconstraints.annotations.IfModAbsent;
+import com.moulberry.mixinconstraints.annotations.IfModLoaded;
+import org.objectweb.asm.Type;
+import org.objectweb.asm.tree.AnnotationNode;
+
+import java.util.List;
+
+public class AnnotationChecker {
+
+    private static final String IF_MOD_LOADED_DESC = Type.getDescriptor(IfModLoaded.class);
+    private static final String IS_MOD_ABSENT_DESC = Type.getDescriptor(IfModAbsent.class);
+    private static final String IF_DEV_ENVIRONMENT_DESC = Type.getDescriptor(IfDevEnvironment.class);
+    private static final String IF_MINECRAFT_VERSION_DESC = Type.getDescriptor(IfMinecraftVersion.class);
+
+    public static boolean isConstraintAnnotationNode(AnnotationNode node) {
+        return IF_MOD_LOADED_DESC.equals(node.desc) || IS_MOD_ABSENT_DESC.equals(node.desc) ||
+            IF_DEV_ENVIRONMENT_DESC.equals(node.desc) || IF_MINECRAFT_VERSION_DESC.equals(node.desc);
+    }
+
+    public static boolean checkAnnotationNode(AnnotationNode node) {
+        if (IF_MOD_LOADED_DESC.equals(node.desc)) {
+            String value = getAnnotationValue(node, "value", "");
+            if (value.isEmpty()) throw new IllegalArgumentException("modid must not be empty");
+
+            List<String> aliases = getAnnotationValue(node, "aliases", List.of());
+            String minVersion = getAnnotationValue(node, "minVersion", null);
+            String maxVersion = getAnnotationValue(node, "maxVersion", null);
+
+            boolean pass = ConstraintChecker.checkModLoaded(value, aliases, minVersion, maxVersion);
+
+            if (MixinConstraints.VERBOSE) {
+                String result = pass ? "PASS" : "FAILED";
+                MixinConstraints.LOGGER.info("@IfModLoaded(value={}, minVersion={}, maxVersion={}) {}", value, minVersion, maxVersion, result);
+            }
+
+            return pass;
+        } else if (IS_MOD_ABSENT_DESC.equals(node.desc)) {
+            String value = getAnnotationValue(node, "value", "");
+            if (value.isEmpty()) throw new IllegalArgumentException("modid must not be empty");
+
+            List<String> aliases = getAnnotationValue(node, "aliases", List.of());
+            String minVersion = getAnnotationValue(node, "minVersion", null);
+            String maxVersion = getAnnotationValue(node, "maxVersion", null);
+
+            boolean pass = ConstraintChecker.checkModAbsent(value, aliases, minVersion, maxVersion);
+
+            if (MixinConstraints.VERBOSE) {
+                String result = pass ? "PASS" : "FAILED";
+                MixinConstraints.LOGGER.info("@IfModAbsent(value={}, minVersion={}, maxVersion={}) {}", value, minVersion, maxVersion, result);
+            }
+
+            return pass;
+        } else if (IF_DEV_ENVIRONMENT_DESC.equals(node.desc)) {
+            boolean negate = getAnnotationValue(node, "negate", false);
+
+            boolean pass = ConstraintChecker.checkDevEnvironment() != negate;
+
+            if (MixinConstraints.VERBOSE) {
+                String result = pass ? "PASS" : "FAILED";
+                MixinConstraints.LOGGER.info("@IfDevEnvironment(negate={}) {}", negate, result);
+            }
+
+            return pass;
+        } else if (IF_MINECRAFT_VERSION_DESC.equals(node.desc)) {
+            String minVersion = getAnnotationValue(node, "minVersion", null);
+            String maxVersion = getAnnotationValue(node, "maxVersion", null);
+            boolean negate = getAnnotationValue(node, "negate", false);
+
+            boolean pass = ConstraintChecker.checkMinecraftVersion(minVersion, maxVersion) != negate;
+
+            if (MixinConstraints.VERBOSE) {
+                String result = pass ? "PASS" : "FAILED";
+                MixinConstraints.LOGGER.info("@IfMinecraftVersion(minVersion={}, maxVersion={}, negate={}) {}", minVersion, maxVersion, negate, result);
+            }
+
+            return pass;
+        }
+        return true;
+    }
+
+    private static <T> T getAnnotationValue(AnnotationNode annotation, String key, T defaultValue) {
+        boolean getNextValue = false;
+        boolean skipNextValue = false;
+
+        if (annotation == null || annotation.values == null) {
+            return defaultValue;
+        }
+
+        // Keys and value are stored in successive pairs, search for the key and if found return the following entry
+        for (Object value : annotation.values) {
+            if (skipNextValue) {
+                skipNextValue = false;
+                continue;
+            }
+            if (getNextValue) {
+                return (T) value;
+            }
+            if (value.equals(key)) {
+                getNextValue = true;
+            } else {
+                skipNextValue = true;
+            }
+        }
+
+        return defaultValue;
+    }
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/checker/ConstraintChecker.java b/src/main/java/com/moulberry/mixinconstraints/checker/ConstraintChecker.java
new file mode 100644
index 0000000..4788f9f
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/checker/ConstraintChecker.java
@@ -0,0 +1,84 @@
+package com.moulberry.mixinconstraints.checker;
+
+import net.fabricmc.loader.api.FabricLoader;
+import net.fabricmc.loader.api.ModContainer;
+import net.fabricmc.loader.api.Version;
+import net.fabricmc.loader.api.VersionParsingException;
+
+import java.util.Optional;
+
+public class ConstraintChecker {
+
+    /**
+     * Check if *ANY* of the modIds provided are loaded
+     */
+    public static boolean checkModLoaded(String main, Iterable<String> aliases, String minVersion, String maxVersion) {
+        if (isModLoadedWithinVersion(main, minVersion, maxVersion)) {
+            return true;
+        }
+
+        for (String modId : aliases) {
+            if (isModLoadedWithinVersion(modId, minVersion, maxVersion)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Check if *ALL* the modIds provided are absent
+     */
+    public static boolean checkModAbsent(String main, Iterable<String> modIds, String minVersion, String maxVersion) {
+        return !checkModLoaded(main, modIds, minVersion, maxVersion);
+    }
+
+    public static boolean checkDevEnvironment() {
+        return FabricLoader.getInstance().isDevelopmentEnvironment();
+    }
+
+    public static boolean checkMinecraftVersion(String minVersion, String maxVersion) {
+        return isModLoadedWithinVersion("minecraft", minVersion, maxVersion);
+    }
+
+    private static boolean isModLoadedWithinVersion(String modId, String minVersion, String maxVersion) {
+        Optional<ModContainer> modContainer = FabricLoader.getInstance().getModContainer(modId);
+        if (modContainer.isEmpty()) {
+            return false;
+        }
+
+        return isVersionInRange(modContainer.get().getMetadata().getVersion(), minVersion, maxVersion);
+    }
+
+    private static boolean isVersionInRange(Version version, String minVersion, String maxVersion) {
+        Version min = minVersion == null || minVersion.isEmpty() ? null : tryParseVersion(minVersion);
+        Version max = maxVersion == null || maxVersion.isEmpty() ? null : tryParseVersion(maxVersion);
+
+        // Ensure range is valid (min <= max)
+        if (min != null && max != null && min.compareTo(max) > 0) {
+            throw new IllegalArgumentException("invalid range: minVersion (" + minVersion + ") > maxVersion (" + maxVersion + ")");
+        }
+
+        // Check version >= min
+        if (min != null && version.compareTo(min) < 0) {
+            return false;
+        }
+
+        // Check version <= max
+        if (max != null && version.compareTo(max) > 0) {
+            return false;
+        }
+
+        return true;
+    }
+
+    private static Version tryParseVersion(String version) {
+        try {
+            return Version.parse(version);
+        } catch (VersionParsingException e) {
+            System.err.println("Invalid version string: " + version + "...");
+            throw new RuntimeException(e);
+        }
+    }
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/mixin/ConstraintsMixinExtension.java b/src/main/java/com/moulberry/mixinconstraints/mixin/ConstraintsMixinExtension.java
new file mode 100644
index 0000000..09b1765
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/mixin/ConstraintsMixinExtension.java
@@ -0,0 +1,45 @@
+package com.moulberry.mixinconstraints.mixin;
+
+import com.llamalad7.mixinextras.lib.apache.commons.tuple.Pair;
+import com.llamalad7.mixinextras.utils.MixinInternals;
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.mixin.MixinEnvironment;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+import org.spongepowered.asm.mixin.transformer.ext.IExtension;
+import org.spongepowered.asm.mixin.transformer.ext.ITargetClassContext;
+
+public class ConstraintsMixinExtension implements IExtension {
+
+    private final String mixinPackage;
+
+    public ConstraintsMixinExtension(String mixinPackage) {
+        if (!mixinPackage.endsWith(".")) {
+            mixinPackage += ".";
+        }
+        this.mixinPackage = mixinPackage;
+    }
+
+    @Override
+    public boolean checkActive(MixinEnvironment environment) {
+        return true;
+    }
+
+    @Override
+    public void preApply(ITargetClassContext context) {
+        for (Pair<IMixinInfo, ClassNode> pair : MixinInternals.getMixinsFor(context)) {
+            if (pair.getLeft().getConfig().getMixinPackage().equals(this.mixinPackage)) {
+                MixinTransformer.transform(pair.getLeft(), pair.getRight());
+            }
+        }
+    }
+
+    @Override
+    public void postApply(ITargetClassContext context) {
+
+    }
+
+    @Override
+    public void export(MixinEnvironment env, String name, boolean force, ClassNode classNode) {
+
+    }
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/mixin/MixinConstraintsBootstrap.java b/src/main/java/com/moulberry/mixinconstraints/mixin/MixinConstraintsBootstrap.java
new file mode 100644
index 0000000..254f631
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/mixin/MixinConstraintsBootstrap.java
@@ -0,0 +1,19 @@
+package com.moulberry.mixinconstraints.mixin;
+
+import com.llamalad7.mixinextras.utils.MixinInternals;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class MixinConstraintsBootstrap {
+
+    private static final Set<String> initializedMixinPackages = new HashSet<>();
+
+    public static void init(String mixinPackage) {
+        if (!initializedMixinPackages.contains(mixinPackage)) {
+            initializedMixinPackages.add(mixinPackage);
+            MixinInternals.registerExtension(new ConstraintsMixinExtension(mixinPackage), true);
+        }
+    }
+
+}
diff --git a/src/main/java/com/moulberry/mixinconstraints/mixin/MixinTransformer.java b/src/main/java/com/moulberry/mixinconstraints/mixin/MixinTransformer.java
new file mode 100644
index 0000000..bd06075
--- /dev/null
+++ b/src/main/java/com/moulberry/mixinconstraints/mixin/MixinTransformer.java
@@ -0,0 +1,57 @@
+package com.moulberry.mixinconstraints.mixin;
+
+import com.moulberry.mixinconstraints.checker.AnnotationChecker;
+import com.moulberry.mixinconstraints.MixinConstraints;
+import org.objectweb.asm.tree.AnnotationNode;
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+import java.util.Iterator;
+import java.util.List;
+
+public class MixinTransformer {
+
+
+    public static void transform(IMixinInfo info, ClassNode classNode) {
+        if (MixinConstraints.VERBOSE) {
+            MixinConstraints.LOGGER.info("Checking inner mixin constraints for {}", info.getClassName());
+        }
+
+        if (classNode.visibleAnnotations != null) {
+            classNode.visibleAnnotations.removeIf(AnnotationChecker::isConstraintAnnotationNode);
+        }
+
+        classNode.fields.removeIf(field -> shouldRemoveTarget("field " + field.name, field.visibleAnnotations));
+        classNode.methods.removeIf(method -> shouldRemoveTarget("method " + method.name, method.visibleAnnotations));
+    }
+
+    private static boolean shouldRemoveTarget(String targetName, List<AnnotationNode> annotations) {
+        if (annotations == null) {
+            return false;
+        }
+
+        boolean remove = false;
+
+        Iterator<AnnotationNode> annotationIterator = annotations.iterator();
+        while (annotationIterator.hasNext()) {
+            AnnotationNode annotationNode = annotationIterator.next();
+
+            if (!remove && !AnnotationChecker.checkAnnotationNode(annotationNode)) {
+                if (MixinConstraints.VERBOSE) {
+                    MixinConstraints.LOGGER.warn("Preventing application of mixin {} due to failing constraint", targetName);
+                }
+
+                remove = true;
+                annotationIterator.remove();
+            } else if (AnnotationChecker.isConstraintAnnotationNode(annotationNode)) {
+                annotationIterator.remove();
+            }
+        }
+
+        return remove;
+    }
+
+
+
+
+}