diff --git a/src/loaders/quilt/raw-quilt-metadata.ts b/src/loaders/quilt/raw-quilt-metadata.ts
new file mode 100644
index 0000000..ecc0b5a
--- /dev/null
+++ b/src/loaders/quilt/raw-quilt-metadata.ts
@@ -0,0 +1,182 @@
+import { ACTION_NAME } from "@/action";
+import { QuiltContactInformation } from "./quilt-contact-information";
+import { QuiltDependency } from "./quilt-dependency";
+import { QuiltEnvironmentType } from "./quilt-environment-type";
+import { QuiltLicense } from "./quilt-license";
+import { QuiltPlugin } from "./quilt-plugin";
+import { QuiltMetadataCustomPayload } from "./quilt-metadata-custom-payload";
+
+// TODO: Remove the deprecated stuff in v4.0.
+
+/**
+ * The metadata file for a Quilt mod.
+ */
+export interface RawQuiltMetadata {
+    /**
+     * Needed for internal mechanisms.
+     *
+     * Must always be `1`.
+     */
+    schema_version: 1;
+
+    /**
+     * Information necessary for the mod loading process.
+     */
+    quilt_loader: {
+        /**
+         * A unique identifier for the organization behind or developers of the mod.
+         *
+         * The group string must match the `^[a-zA-Z0-9-_.]+$` regular expression, and must not begin with the reserved namespace `loader.plugin`.
+         */
+        group: string;
+
+        /**
+         * A unique identifier for the mod or library defined by this metadata.
+         *
+         * The ID string should match the `^[a-z][a-z0-9-_]{1,63}$` regular expression.
+         *
+         * Best practice is that mod ID's are in `snake_case`.
+         */
+        id: string;
+
+        /**
+         * The mod's version.
+         *
+         * Must conform to the Semantic Versioning 2.0.0 specification.
+         */
+        version: string;
+
+        /**
+         * Defines main classes of the mod, that will be loaded.
+         */
+        entrypoints?: Record<string, string | QuiltPlugin | (string | QuiltPlugin)[]>;
+
+        /**
+         * Defines loader plugins.
+         */
+        plugins?: (string | QuiltPlugin)[];
+
+        /**
+         * A list of paths to nested JAR files to load, relative to the root directory inside of the mods JAR.
+         */
+        jars?: string[];
+
+        /**
+         * Defines language adapters.
+         */
+        language_adapters?: Record<string, string>;
+
+        /**
+         * Defines other mods/APIs this mod provides.
+         */
+        provides?: (string | QuiltDependency)[];
+
+        /**
+         * Defines mods that this mod will not function without.
+         */
+        depends?: (string | QuiltDependency)[];
+
+        /**
+         * Defines mods that this mod either breaks or is broken by.
+         */
+        breaks?: (string | QuiltDependency)[];
+
+        /**
+         * Influences whether or not a mod candidate should be loaded or not.
+         */
+        load_type?: "always" | "if_possible" | "if_required";
+
+        /**
+         * A list of Maven repository URL strings where dependencies can be looked for in addition to Quilt's central repository.
+         */
+        repositories?: string[];
+
+        /**
+         * The intermediate mappings used for this mod.
+         *
+         * The intermediate mappings string must be a valid maven coordinate and match the `^[a-zA-Z0-9-_.]+:[a-zA-Z0-9-_.]+$` regular expression.
+         *
+         * This field currently only officially supports `org.quiltmc:hashed` and `net.fabricmc:intermediary`.
+         */
+        intermediate_mappings?: string;
+
+        /**
+         * Optional metadata that can be used by mods to display information about the mods installed.
+         */
+        metadata?: {
+            /**
+             * A human-readable name for this mod.
+             */
+            name?: string;
+
+            /**
+             * A human-readable description of this mod.
+             */
+            description?: string;
+
+            /**
+             * A collection of key/value pairs denoting the persons or organizations that contributed to this project.
+             *
+             *  - The key should be the name of the person or organization.
+             *  - The value can be either a string representing a single role or an array of strings each one representing a single role.
+             */
+            contributors?: Record<string, string | string[]>;
+
+            /**
+             * Denotes various contact information for the people behind this mod.
+             */
+            contact?: QuiltContactInformation;
+
+            /**
+             * The license this project operates under.
+             */
+            license?: string | QuiltLicense | (string | QuiltLicense)[];
+
+            /**
+             * One or more paths to a square .PNG file.
+             *
+             * If an object is provided, the keys must be the resolution of the corresponding file.
+             */
+            icon?: string | Record<string, string>;
+        };
+    };
+
+    /**
+     * A single path or array of paths to mixin configuration files relative to the root of the mod JAR.
+     */
+    mixin?: string | string[];
+
+    /**
+     * A single path or array of paths to access widener files relative to the root of the mod JAR.
+     */
+    access_widener?: string | string[];
+
+    /**
+     * Contains flags and options related to Minecraft specifically.
+     */
+    minecraft?: {
+        /**
+         * Defines the environment(s) that the mod should be loaded on.
+         */
+        environment?: QuiltEnvironmentType;
+    };
+
+    /**
+     * Custom action payload.
+     */
+    [ACTION_NAME]?: QuiltMetadataCustomPayload;
+
+    /**
+     * Custom action payload (legacy).
+     *
+     * @deprecated
+     *
+     * Use [{@link ACTION_NAME}] instead.
+     */
+    projects?: QuiltMetadataCustomPayload;
+}
+
+/**
+ * Name of the `quilt.mod.json` file, that contains raw Quilt metadata.
+ */
+export const QUILT_MOD_JSON = "quilt.mod.json";