diff --git a/.github/check-self-contained.sh b/.github/check-self-contained.sh
new file mode 100755
index 0000000..c2a8fff
--- /dev/null
+++ b/.github/check-self-contained.sh
@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+#
+# Verifies that this API can be compiled on its own, without the CommonCapabilities mod
+# and without loader-specific CyclopsCore classes.
+#
+# CyclopsCore consumes this repo as a submodule in a dedicated source set that only sees
+# Minecraft, NeoForge and CyclopsCore's loader-common. Anything outside of that breaks its
+# build, which is what this check guards against.
+#
+# Usage: .github/check-self-contained.sh [path-to-cyclopscore-checkout]
+
+set -euo pipefail
+
+API_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+CYCLOPSCORE_DIR="${1:-}"
+CYCLOPSCORE_COMMON=""
+
+if [[ -n "${CYCLOPSCORE_DIR}" ]]; then
+    CYCLOPSCORE_COMMON="${CYCLOPSCORE_DIR}/loader-common/src/main/java"
+    if [[ ! -d "${CYCLOPSCORE_COMMON}" ]]; then
+        echo "error: ${CYCLOPSCORE_COMMON} does not exist" >&2
+        exit 1
+    fi
+fi
+
+failures=0
+
+fail() {
+    echo "  $1" >&2
+    failures=$((failures + 1))
+}
+
+# Reduce a dotted name to its top-level class, e.g. a.b.C.D.FIELD -> a.b.C
+top_level_class() {
+    local name="$1" out="" segment
+    local IFS='.'
+    for segment in ${name}; do
+        out="${out:+${out}.}${segment}"
+        if [[ "${segment}" =~ ^[A-Z] ]]; then
+            echo "${out}"
+            return
+        fi
+    done
+    echo ""
+}
+
+# Collect every org.cyclops.* reference, both imports and inline fully-qualified usages.
+# Only this repo's own tracked sources are scanned, so a CyclopsCore checkout that happens to
+# sit inside the working directory is not picked up.
+sources="$(git -C "${API_DIR}" ls-files '*.java')"
+if [[ -z "${sources}" ]]; then
+    echo "error: no java sources found in ${API_DIR}" >&2
+    exit 1
+fi
+references="$(echo "${sources}" \
+    | sed -E "s|^|${API_DIR}/|" \
+    | xargs grep -hoE 'org\.cyclops\.[A-Za-z0-9_.]+' \
+    | sed -E 's/\.$//' \
+    | sort -u)"
+
+while IFS= read -r reference; do
+    [[ -n "${reference}" ]] || continue
+    class="$(top_level_class "${reference}")"
+
+    if [[ "${reference}" == org.cyclops.commoncapabilities.* ]]; then
+        if [[ "${reference}" != org.cyclops.commoncapabilities.api.* ]]; then
+            fail "${reference} lives in the CommonCapabilities mod, not in this API"
+        fi
+        continue
+    fi
+
+    if [[ "${reference}" == org.cyclops.cyclopscore.* ]]; then
+        if [[ -z "${class}" ]]; then
+            # A wildcard import or a bare package reference, nothing to resolve
+            continue
+        fi
+        if [[ -z "${CYCLOPSCORE_COMMON}" ]]; then
+            echo "  skipping ${class}, no CyclopsCore checkout given" >&2
+            continue
+        fi
+        if [[ ! -f "${CYCLOPSCORE_COMMON}/${class//.//}.java" ]]; then
+            fail "${class} is not in CyclopsCore's loader-common, so it is loader-specific"
+        fi
+        continue
+    fi
+
+    fail "${reference} is not part of this API, CyclopsCore's loader-common, Minecraft or NeoForge"
+done <<< "${references}"
+
+if [[ "${failures}" -gt 0 ]]; then
+    echo "" >&2
+    echo "${failures} disallowed reference(s) found, this API is no longer self-contained." >&2
+    exit 1
+fi
+
+echo "This API is self-contained."
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..fdd31c0
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  self-contained:
+    name: Check self-containment
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout API
+        uses: actions/checkout@v4
+
+      - name: Checkout CyclopsCore
+        uses: actions/checkout@v4
+        with:
+          repository: CyclopsMC/CyclopsCore
+          # The branch that consumes this API branch as a submodule
+          ref: master-26
+          path: cyclopscore
+
+      - name: Check
+        run: .github/check-self-contained.sh cyclopscore
diff --git a/capability/itemhandler/ItemMatch.java b/capability/itemhandler/ItemMatch.java
index 049f600..83df6d0 100644
--- a/capability/itemhandler/ItemMatch.java
+++ b/capability/itemhandler/ItemMatch.java
@@ -2,7 +2,7 @@
 
 import net.minecraft.core.component.DataComponentMap;
 import net.minecraft.world.item.ItemStack;
-import org.cyclops.commoncapabilities.ingredient.DataComparator;
+import org.cyclops.commoncapabilities.api.ingredient.IDataComparator;
 
 /**
  * Item matching flags to be used in {@link ISlotlessItemHandler}.
@@ -34,7 +34,7 @@ public final class ItemMatch {
     /**
      * A comparator for data components. (This is set in GeneralConfig)
      */
-    public static DataComparator DATA_COMPARATOR;
+    public static IDataComparator DATA_COMPARATOR;
 
     public static boolean areItemStacksEqual(ItemStack a, ItemStack b, int matchFlags) {
         if (matchFlags == ANY) {
diff --git a/capability/recipehandler/RecipeDefinition.java b/capability/recipehandler/RecipeDefinition.java
index 4ed611b..a9d4ec0 100644
--- a/capability/recipehandler/RecipeDefinition.java
+++ b/capability/recipehandler/RecipeDefinition.java
@@ -8,7 +8,6 @@
 import net.minecraft.world.level.Level;
 import org.cyclops.commoncapabilities.api.ingredient.*;
 import org.cyclops.cyclopscore.helper.IModHelpers;
-import org.cyclops.cyclopscore.helper.IModHelpersNeoForge;
 
 import javax.annotation.Nullable;
 import java.util.*;
@@ -64,7 +63,7 @@ public RecipeDefinition(Map<IngredientComponent<?, ?>, List<IPrototypedIngredien
     public static RecipeDefinition fromRecipeId(Level level, ResourceKey<Recipe<?>> recipeId) {
         Optional<RecipeHolder<?>> recipeHolder;
         if (IModHelpers.get().getMinecraftHelpers().isClientSide()) {
-            recipeHolder = Optional.ofNullable(IModHelpersNeoForge.get().getMinecraftClientHelpers().getRecipes().byKey(recipeId));
+            recipeHolder = Optional.ofNullable(IModHelpers.get().getMinecraftClientHelpers().getRecipes().byKey(recipeId));
         } else {
             recipeHolder = IModHelpers.get().getCraftingHelpers().getRecipeManager().byKey(recipeId);
         }
diff --git a/ingredient/IDataComparator.java b/ingredient/IDataComparator.java
new file mode 100644
index 0000000..dc62e51
--- /dev/null
+++ b/ingredient/IDataComparator.java
@@ -0,0 +1,18 @@
+package org.cyclops.commoncapabilities.api.ingredient;
+
+import net.minecraft.core.component.DataComponentMap;
+
+import java.util.Comparator;
+
+/**
+ * A comparator for data component maps that can ignore certain data component types.
+ * @author rubensworks
+ */
+public interface IDataComparator extends Comparator<DataComponentMap> {
+
+    /**
+     * @return If at least one data component type is being ignored.
+     */
+    public boolean hasIgnoreDataComponentTypes();
+
+}