diff --git a/src/main/java/cpw/mods/modlauncher/api/ITransformer.java b/src/main/java/cpw/mods/modlauncher/api/ITransformer.java
index cb4b90a..aae30b0 100644
--- a/src/main/java/cpw/mods/modlauncher/api/ITransformer.java
+++ b/src/main/java/cpw/mods/modlauncher/api/ITransformer.java
@@ -1,4 +1,26 @@
 package cpw.mods.modlauncher.api;
 
+import java.util.Set;
+
 public interface ITransformer<T> {
+	String[] DEFAULT_LABEL = { "default" };
+
+	T transform(T input, ITransformerVotingContext context);
+
+	TransformerVoteResult castVote(ITransformerVotingContext context);
+
+	Set<Target> targets();
+
+	default String[] labels() {
+		return DEFAULT_LABEL;
+	}
+
+	enum TargetType {
+		CLASS,
+		METHOD,
+		FIELD
+	}
+
+	final class Target {
+	}
 }
diff --git a/src/main/java/cpw/mods/modlauncher/api/ITransformerVotingContext.java b/src/main/java/cpw/mods/modlauncher/api/ITransformerVotingContext.java
new file mode 100644
index 0000000..9c8acfd
--- /dev/null
+++ b/src/main/java/cpw/mods/modlauncher/api/ITransformerVotingContext.java
@@ -0,0 +1,4 @@
+package cpw.mods.modlauncher.api;
+
+public interface ITransformerVotingContext {
+}
\ No newline at end of file
diff --git a/src/main/java/cpw/mods/modlauncher/api/TransformerVoteResult.java b/src/main/java/cpw/mods/modlauncher/api/TransformerVoteResult.java
new file mode 100644
index 0000000..df90c9f
--- /dev/null
+++ b/src/main/java/cpw/mods/modlauncher/api/TransformerVoteResult.java
@@ -0,0 +1,8 @@
+package cpw.mods.modlauncher.api;
+
+public enum TransformerVoteResult {
+	YES,
+	DEFER,
+	NO,
+	REJECT
+}