8 files changed, 712 insertions, 0 deletions
diff --git a/protocol/.gitignore b/protocol/.gitignore
new file mode 100644
index 0000000..ee37d2b
--- /dev/null
+++ b/protocol/.gitignore
@@ -0,0 +1,2 @@
+node_modules/
+target/
+\ No newline at end of file
diff --git a/protocol/Cargo.toml b/protocol/Cargo.toml
new file mode 100644
index 0000000..4d85516
--- /dev/null
+++ b/protocol/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "protocol"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+prost = { version = "0.13.5", default-features = false, features = ["std"] }
+
+[build-dependencies]
+prost-build = "0.13.5"
diff --git a/protocol/build.rs b/protocol/build.rs
new file mode 100644
index 0000000..f23f5ee
--- /dev/null
+++ b/protocol/build.rs
@@ -0,0 +1,6 @@
+use std::io::Result;
+
+fn main() -> Result<()> {
+    prost_build::compile_protos(&["src/test.proto"], &["src/"])?;
+    Ok(())
+}
diff --git a/protocol/compiled/protocol.d.ts b/protocol/compiled/protocol.d.ts
new file mode 100644
index 0000000..76e462d
--- /dev/null
+++ b/protocol/compiled/protocol.d.ts
@@ -0,0 +1,205 @@
+import * as $protobuf from "protobufjs";
+import Long = require("long");
+/** Namespace todo. */
+export namespace todo {
+
+    /** Properties of an Inner. */
+    interface IInner {
+
+        /** Inner value */
+        value?: (number|null);
+    }
+
+    /** Represents an Inner. */
+    class Inner implements IInner {
+
+        /**
+         * Constructs a new Inner.
+         * @param [properties] Properties to set
+         */
+        constructor(properties?: todo.IInner);
+
+        /** Inner value. */
+        public value: number;
+
+        /**
+         * Creates a new Inner instance using the specified properties.
+         * @param [properties] Properties to set
+         * @returns Inner instance
+         */
+        public static create(properties?: todo.IInner): todo.Inner;
+
+        /**
+         * Encodes the specified Inner message. Does not implicitly {@link todo.Inner.verify|verify} messages.
+         * @param message Inner message or plain object to encode
+         * @param [writer] Writer to encode to
+         * @returns Writer
+         */
+        public static encode(message: todo.IInner, writer?: $protobuf.Writer): $protobuf.Writer;
+
+        /**
+         * Encodes the specified Inner message, length delimited. Does not implicitly {@link todo.Inner.verify|verify} messages.
+         * @param message Inner message or plain object to encode
+         * @param [writer] Writer to encode to
+         * @returns Writer
+         */
+        public static encodeDelimited(message: todo.IInner, writer?: $protobuf.Writer): $protobuf.Writer;
+
+        /**
+         * Decodes an Inner message from the specified reader or buffer.
+         * @param reader Reader or buffer to decode from
+         * @param [length] Message length if known beforehand
+         * @returns Inner
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): todo.Inner;
+
+        /**
+         * Decodes an Inner message from the specified reader or buffer, length delimited.
+         * @param reader Reader or buffer to decode from
+         * @returns Inner
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): todo.Inner;
+
+        /**
+         * Verifies an Inner message.
+         * @param message Plain object to verify
+         * @returns `null` if valid, otherwise the reason why it is not
+         */
+        public static verify(message: { [k: string]: any }): (string|null);
+
+        /**
+         * Creates an Inner message from a plain object. Also converts values to their respective internal types.
+         * @param object Plain object
+         * @returns Inner
+         */
+        public static fromObject(object: { [k: string]: any }): todo.Inner;
+
+        /**
+         * Creates a plain object from an Inner message. Also converts values to other types if specified.
+         * @param message Inner
+         * @param [options] Conversion options
+         * @returns Plain object
+         */
+        public static toObject(message: todo.Inner, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+        /**
+         * Converts this Inner to JSON.
+         * @returns JSON object
+         */
+        public toJSON(): { [k: string]: any };
+
+        /**
+         * Gets the default type url for Inner
+         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+         * @returns The default type url
+         */
+        public static getTypeUrl(typeUrlPrefix?: string): string;
+    }
+
+    /** Properties of a MyMessage. */
+    interface IMyMessage {
+
+        /** MyMessage inner */
+        inner?: (todo.IInner|null);
+
+        /** MyMessage value */
+        value?: (number|null);
+    }
+
+    /** Represents a MyMessage. */
+    class MyMessage implements IMyMessage {
+
+        /**
+         * Constructs a new MyMessage.
+         * @param [properties] Properties to set
+         */
+        constructor(properties?: todo.IMyMessage);
+
+        /** MyMessage inner. */
+        public inner?: (todo.IInner|null);
+
+        /** MyMessage value. */
+        public value: number;
+
+        /**
+         * Creates a new MyMessage instance using the specified properties.
+         * @param [properties] Properties to set
+         * @returns MyMessage instance
+         */
+        public static create(properties?: todo.IMyMessage): todo.MyMessage;
+
+        /**
+         * Encodes the specified MyMessage message. Does not implicitly {@link todo.MyMessage.verify|verify} messages.
+         * @param message MyMessage message or plain object to encode
+         * @param [writer] Writer to encode to
+         * @returns Writer
+         */
+        public static encode(message: todo.IMyMessage, writer?: $protobuf.Writer): $protobuf.Writer;
+
+        /**
+         * Encodes the specified MyMessage message, length delimited. Does not implicitly {@link todo.MyMessage.verify|verify} messages.
+         * @param message MyMessage message or plain object to encode
+         * @param [writer] Writer to encode to
+         * @returns Writer
+         */
+        public static encodeDelimited(message: todo.IMyMessage, writer?: $protobuf.Writer): $protobuf.Writer;
+
+        /**
+         * Decodes a MyMessage message from the specified reader or buffer.
+         * @param reader Reader or buffer to decode from
+         * @param [length] Message length if known beforehand
+         * @returns MyMessage
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): todo.MyMessage;
+
+        /**
+         * Decodes a MyMessage message from the specified reader or buffer, length delimited.
+         * @param reader Reader or buffer to decode from
+         * @returns MyMessage
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): todo.MyMessage;
+
+        /**
+         * Verifies a MyMessage message.
+         * @param message Plain object to verify
+         * @returns `null` if valid, otherwise the reason why it is not
+         */
+        public static verify(message: { [k: string]: any }): (string|null);
+
+        /**
+         * Creates a MyMessage message from a plain object. Also converts values to their respective internal types.
+         * @param object Plain object
+         * @returns MyMessage
+         */
+        public static fromObject(object: { [k: string]: any }): todo.MyMessage;
+
+        /**
+         * Creates a plain object from a MyMessage message. Also converts values to other types if specified.
+         * @param message MyMessage
+         * @param [options] Conversion options
+         * @returns Plain object
+         */
+        public static toObject(message: todo.MyMessage, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+        /**
+         * Converts this MyMessage to JSON.
+         * @returns JSON object
+         */
+        public toJSON(): { [k: string]: any };
+
+        /**
+         * Gets the default type url for MyMessage
+         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+         * @returns The default type url
+         */
+        public static getTypeUrl(typeUrlPrefix?: string): string;
+    }
+}
diff --git a/protocol/compiled/protocol.js b/protocol/compiled/protocol.js
new file mode 100644
index 0000000..45268ef
--- /dev/null
+++ b/protocol/compiled/protocol.js
@@ -0,0 +1,461 @@
+/*eslint-disable block-scoped-var, id-length, no-control-regex, no-magic-numbers, no-prototype-builtins, no-redeclare, no-shadow, no-var, sort-vars*/
+import * as $protobuf from "protobufjs/minimal";
+
+// Common aliases
+const $Reader = $protobuf.Reader, $Writer = $protobuf.Writer, $util = $protobuf.util;
+
+// Exported root namespace
+const $root = $protobuf.roots["default"] || ($protobuf.roots["default"] = {});
+
+export const todo = $root.todo = (() => {
+
+    /**
+     * Namespace todo.
+     * @exports todo
+     * @namespace
+     */
+    const todo = {};
+
+    todo.Inner = (function() {
+
+        /**
+         * Properties of an Inner.
+         * @memberof todo
+         * @interface IInner
+         * @property {number|null} [value] Inner value
+         */
+
+        /**
+         * Constructs a new Inner.
+         * @memberof todo
+         * @classdesc Represents an Inner.
+         * @implements IInner
+         * @constructor
+         * @param {todo.IInner=} [properties] Properties to set
+         */
+        function Inner(properties) {
+            if (properties)
+                for (let keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                    if (properties[keys[i]] != null)
+                        this[keys[i]] = properties[keys[i]];
+        }
+
+        /**
+         * Inner value.
+         * @member {number} value
+         * @memberof todo.Inner
+         * @instance
+         */
+        Inner.prototype.value = 0;
+
+        /**
+         * Creates a new Inner instance using the specified properties.
+         * @function create
+         * @memberof todo.Inner
+         * @static
+         * @param {todo.IInner=} [properties] Properties to set
+         * @returns {todo.Inner} Inner instance
+         */
+        Inner.create = function create(properties) {
+            return new Inner(properties);
+        };
+
+        /**
+         * Encodes the specified Inner message. Does not implicitly {@link todo.Inner.verify|verify} messages.
+         * @function encode
+         * @memberof todo.Inner
+         * @static
+         * @param {todo.IInner} message Inner message or plain object to encode
+         * @param {$protobuf.Writer} [writer] Writer to encode to
+         * @returns {$protobuf.Writer} Writer
+         */
+        Inner.encode = function encode(message, writer) {
+            if (!writer)
+                writer = $Writer.create();
+            if (message.value != null && Object.hasOwnProperty.call(message, "value"))
+                writer.uint32(/* id 1, wireType 0 =*/8).int32(message.value);
+            return writer;
+        };
+
+        /**
+         * Encodes the specified Inner message, length delimited. Does not implicitly {@link todo.Inner.verify|verify} messages.
+         * @function encodeDelimited
+         * @memberof todo.Inner
+         * @static
+         * @param {todo.IInner} message Inner message or plain object to encode
+         * @param {$protobuf.Writer} [writer] Writer to encode to
+         * @returns {$protobuf.Writer} Writer
+         */
+        Inner.encodeDelimited = function encodeDelimited(message, writer) {
+            return this.encode(message, writer).ldelim();
+        };
+
+        /**
+         * Decodes an Inner message from the specified reader or buffer.
+         * @function decode
+         * @memberof todo.Inner
+         * @static
+         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+         * @param {number} [length] Message length if known beforehand
+         * @returns {todo.Inner} Inner
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        Inner.decode = function decode(reader, length, error) {
+            if (!(reader instanceof $Reader))
+                reader = $Reader.create(reader);
+            let end = length === undefined ? reader.len : reader.pos + length, message = new $root.todo.Inner();
+            while (reader.pos < end) {
+                let tag = reader.uint32();
+                if (tag === error)
+                    break;
+                switch (tag >>> 3) {
+                case 1: {
+                        message.value = reader.int32();
+                        break;
+                    }
+                default:
+                    reader.skipType(tag & 7);
+                    break;
+                }
+            }
+            return message;
+        };
+
+        /**
+         * Decodes an Inner message from the specified reader or buffer, length delimited.
+         * @function decodeDelimited
+         * @memberof todo.Inner
+         * @static
+         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+         * @returns {todo.Inner} Inner
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        Inner.decodeDelimited = function decodeDelimited(reader) {
+            if (!(reader instanceof $Reader))
+                reader = new $Reader(reader);
+            return this.decode(reader, reader.uint32());
+        };
+
+        /**
+         * Verifies an Inner message.
+         * @function verify
+         * @memberof todo.Inner
+         * @static
+         * @param {Object.<string,*>} message Plain object to verify
+         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+         */
+        Inner.verify = function verify(message) {
+            if (typeof message !== "object" || message === null)
+                return "object expected";
+            if (message.value != null && message.hasOwnProperty("value"))
+                if (!$util.isInteger(message.value))
+                    return "value: integer expected";
+            return null;
+        };
+
+        /**
+         * Creates an Inner message from a plain object. Also converts values to their respective internal types.
+         * @function fromObject
+         * @memberof todo.Inner
+         * @static
+         * @param {Object.<string,*>} object Plain object
+         * @returns {todo.Inner} Inner
+         */
+        Inner.fromObject = function fromObject(object) {
+            if (object instanceof $root.todo.Inner)
+                return object;
+            let message = new $root.todo.Inner();
+            if (object.value != null)
+                message.value = object.value | 0;
+            return message;
+        };
+
+        /**
+         * Creates a plain object from an Inner message. Also converts values to other types if specified.
+         * @function toObject
+         * @memberof todo.Inner
+         * @static
+         * @param {todo.Inner} message Inner
+         * @param {$protobuf.IConversionOptions} [options] Conversion options
+         * @returns {Object.<string,*>} Plain object
+         */
+        Inner.toObject = function toObject(message, options) {
+            if (!options)
+                options = {};
+            let object = {};
+            if (options.defaults)
+                object.value = 0;
+            if (message.value != null && message.hasOwnProperty("value"))
+                object.value = message.value;
+            return object;
+        };
+
+        /**
+         * Converts this Inner to JSON.
+         * @function toJSON
+         * @memberof todo.Inner
+         * @instance
+         * @returns {Object.<string,*>} JSON object
+         */
+        Inner.prototype.toJSON = function toJSON() {
+            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+        };
+
+        /**
+         * Gets the default type url for Inner
+         * @function getTypeUrl
+         * @memberof todo.Inner
+         * @static
+         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+         * @returns {string} The default type url
+         */
+        Inner.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+            if (typeUrlPrefix === undefined) {
+                typeUrlPrefix = "type.googleapis.com";
+            }
+            return typeUrlPrefix + "/todo.Inner";
+        };
+
+        return Inner;
+    })();
+
+    todo.MyMessage = (function() {
+
+        /**
+         * Properties of a MyMessage.
+         * @memberof todo
+         * @interface IMyMessage
+         * @property {todo.IInner|null} [inner] MyMessage inner
+         * @property {number|null} [value] MyMessage value
+         */
+
+        /**
+         * Constructs a new MyMessage.
+         * @memberof todo
+         * @classdesc Represents a MyMessage.
+         * @implements IMyMessage
+         * @constructor
+         * @param {todo.IMyMessage=} [properties] Properties to set
+         */
+        function MyMessage(properties) {
+            if (properties)
+                for (let keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                    if (properties[keys[i]] != null)
+                        this[keys[i]] = properties[keys[i]];
+        }
+
+        /**
+         * MyMessage inner.
+         * @member {todo.IInner|null|undefined} inner
+         * @memberof todo.MyMessage
+         * @instance
+         */
+        MyMessage.prototype.inner = null;
+
+        /**
+         * MyMessage value.
+         * @member {number} value
+         * @memberof todo.MyMessage
+         * @instance
+         */
+        MyMessage.prototype.value = 0;
+
+        /**
+         * Creates a new MyMessage instance using the specified properties.
+         * @function create
+         * @memberof todo.MyMessage
+         * @static
+         * @param {todo.IMyMessage=} [properties] Properties to set
+         * @returns {todo.MyMessage} MyMessage instance
+         */
+        MyMessage.create = function create(properties) {
+            return new MyMessage(properties);
+        };
+
+        /**
+         * Encodes the specified MyMessage message. Does not implicitly {@link todo.MyMessage.verify|verify} messages.
+         * @function encode
+         * @memberof todo.MyMessage
+         * @static
+         * @param {todo.IMyMessage} message MyMessage message or plain object to encode
+         * @param {$protobuf.Writer} [writer] Writer to encode to
+         * @returns {$protobuf.Writer} Writer
+         */
+        MyMessage.encode = function encode(message, writer) {
+            if (!writer)
+                writer = $Writer.create();
+            if (message.inner != null && Object.hasOwnProperty.call(message, "inner"))
+                $root.todo.Inner.encode(message.inner, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+            if (message.value != null && Object.hasOwnProperty.call(message, "value"))
+                writer.uint32(/* id 2, wireType 0 =*/16).int32(message.value);
+            return writer;
+        };
+
+        /**
+         * Encodes the specified MyMessage message, length delimited. Does not implicitly {@link todo.MyMessage.verify|verify} messages.
+         * @function encodeDelimited
+         * @memberof todo.MyMessage
+         * @static
+         * @param {todo.IMyMessage} message MyMessage message or plain object to encode
+         * @param {$protobuf.Writer} [writer] Writer to encode to
+         * @returns {$protobuf.Writer} Writer
+         */
+        MyMessage.encodeDelimited = function encodeDelimited(message, writer) {
+            return this.encode(message, writer).ldelim();
+        };
+
+        /**
+         * Decodes a MyMessage message from the specified reader or buffer.
+         * @function decode
+         * @memberof todo.MyMessage
+         * @static
+         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+         * @param {number} [length] Message length if known beforehand
+         * @returns {todo.MyMessage} MyMessage
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        MyMessage.decode = function decode(reader, length, error) {
+            if (!(reader instanceof $Reader))
+                reader = $Reader.create(reader);
+            let end = length === undefined ? reader.len : reader.pos + length, message = new $root.todo.MyMessage();
+            while (reader.pos < end) {
+                let tag = reader.uint32();
+                if (tag === error)
+                    break;
+                switch (tag >>> 3) {
+                case 1: {
+                        message.inner = $root.todo.Inner.decode(reader, reader.uint32());
+                        break;
+                    }
+                case 2: {
+                        message.value = reader.int32();
+                        break;
+                    }
+                default:
+                    reader.skipType(tag & 7);
+                    break;
+                }
+            }
+            return message;
+        };
+
+        /**
+         * Decodes a MyMessage message from the specified reader or buffer, length delimited.
+         * @function decodeDelimited
+         * @memberof todo.MyMessage
+         * @static
+         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+         * @returns {todo.MyMessage} MyMessage
+         * @throws {Error} If the payload is not a reader or valid buffer
+         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+         */
+        MyMessage.decodeDelimited = function decodeDelimited(reader) {
+            if (!(reader instanceof $Reader))
+                reader = new $Reader(reader);
+            return this.decode(reader, reader.uint32());
+        };
+
+        /**
+         * Verifies a MyMessage message.
+         * @function verify
+         * @memberof todo.MyMessage
+         * @static
+         * @param {Object.<string,*>} message Plain object to verify
+         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+         */
+        MyMessage.verify = function verify(message) {
+            if (typeof message !== "object" || message === null)
+                return "object expected";
+            if (message.inner != null && message.hasOwnProperty("inner")) {
+                let error = $root.todo.Inner.verify(message.inner);
+                if (error)
+                    return "inner." + error;
+            }
+            if (message.value != null && message.hasOwnProperty("value"))
+                if (!$util.isInteger(message.value))
+                    return "value: integer expected";
+            return null;
+        };
+
+        /**
+         * Creates a MyMessage message from a plain object. Also converts values to their respective internal types.
+         * @function fromObject
+         * @memberof todo.MyMessage
+         * @static
+         * @param {Object.<string,*>} object Plain object
+         * @returns {todo.MyMessage} MyMessage
+         */
+        MyMessage.fromObject = function fromObject(object) {
+            if (object instanceof $root.todo.MyMessage)
+                return object;
+            let message = new $root.todo.MyMessage();
+            if (object.inner != null) {
+                if (typeof object.inner !== "object")
+                    throw TypeError(".todo.MyMessage.inner: object expected");
+                message.inner = $root.todo.Inner.fromObject(object.inner);
+            }
+            if (object.value != null)
+                message.value = object.value | 0;
+            return message;
+        };
+
+        /**
+         * Creates a plain object from a MyMessage message. Also converts values to other types if specified.
+         * @function toObject
+         * @memberof todo.MyMessage
+         * @static
+         * @param {todo.MyMessage} message MyMessage
+         * @param {$protobuf.IConversionOptions} [options] Conversion options
+         * @returns {Object.<string,*>} Plain object
+         */
+        MyMessage.toObject = function toObject(message, options) {
+            if (!options)
+                options = {};
+            let object = {};
+            if (options.defaults) {
+                object.inner = null;
+                object.value = 0;
+            }
+            if (message.inner != null && message.hasOwnProperty("inner"))
+                object.inner = $root.todo.Inner.toObject(message.inner, options);
+            if (message.value != null && message.hasOwnProperty("value"))
+                object.value = message.value;
+            return object;
+        };
+
+        /**
+         * Converts this MyMessage to JSON.
+         * @function toJSON
+         * @memberof todo.MyMessage
+         * @instance
+         * @returns {Object.<string,*>} JSON object
+         */
+        MyMessage.prototype.toJSON = function toJSON() {
+            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+        };
+
+        /**
+         * Gets the default type url for MyMessage
+         * @function getTypeUrl
+         * @memberof todo.MyMessage
+         * @static
+         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+         * @returns {string} The default type url
+         */
+        MyMessage.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+            if (typeUrlPrefix === undefined) {
+                typeUrlPrefix = "type.googleapis.com";
+            }
+            return typeUrlPrefix + "/todo.MyMessage";
+        };
+
+        return MyMessage;
+    })();
+
+    return todo;
+})();
+
+export { $root as default };
diff --git a/protocol/package.json b/protocol/package.json
new file mode 100644
index 0000000..205e496
--- /dev/null
+++ b/protocol/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "todo-protocol",
+  "main": "compiled/protocol",
+  "scripts": {
+    "build": "bunx pbjs -t static-module -w es6 --es6 -o compiled/protocol.js src/*.proto && bunx pbts -o compiled/protocol.d.ts compiled/protocol.js"
+  },
+  "dependencies": {
+    "protobufjs": "^7.5.1"
+  },
+  "devDependencies": {
+    "protobufjs-cli": "^1.1.3"
+  }
+}
+\ No newline at end of file
diff --git a/protocol/src/lib.rs b/protocol/src/lib.rs
new file mode 100644
index 0000000..dea67bf
--- /dev/null
+++ b/protocol/src/lib.rs
@@ -0,0 +1,3 @@
+pub mod todo {
+    include!(concat!(env!("OUT_DIR"), "/todo.rs"));
+}
diff --git a/protocol/src/test.proto b/protocol/src/test.proto
new file mode 100644
index 0000000..776bf2a
--- /dev/null
+++ b/protocol/src/test.proto
@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+package todo;
+
+message Inner {
+    int32 value = 1;
+}
+
+message MyMessage {
+    Inner inner = 1;
+    int32 value = 2;
+}