diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..f66cdf6
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,10 @@
+FROM python:3.8-slim
+
+RUN apt update && apt install -y git
+
+COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD [ "python", "./optimizer_worker.py" ]
diff --git a/db_repo/README b/db_repo/README
new file mode 100644
index 0000000..6218f8c
--- /dev/null
+++ b/db_repo/README
@@ -0,0 +1,4 @@
+This is a database migration repository.
+
+More information at
+http://code.google.com/p/sqlalchemy-migrate/
diff --git a/db_repo/__init__.py b/db_repo/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/db_repo/manage.py b/db_repo/manage.py
new file mode 100644
index 0000000..39fa389
--- /dev/null
+++ b/db_repo/manage.py
@@ -0,0 +1,5 @@
+#!/usr/bin/env python
+from migrate.versioning.shell import main
+
+if __name__ == '__main__':
+    main(debug='False')
diff --git a/db_repo/migrate.cfg b/db_repo/migrate.cfg
new file mode 100644
index 0000000..787fec1
--- /dev/null
+++ b/db_repo/migrate.cfg
@@ -0,0 +1,25 @@
+[db_settings]
+# Used to identify which repository this database is versioned under.
+# You can use the name of your project.
+repository_id=assets-bot work table
+
+# The name of the database table used to track the schema version.
+# This name shouldn't already be used by your project.
+# If this is changed once a database is under version control, you'll need to
+# change the table name in each database too.
+version_table=migrate_version
+
+# When committing a change script, Migrate will attempt to generate the
+# sql for all supported databases; normally, if one of them fails - probably
+# because you don't have that database installed - it is ignored and the
+# commit continues, perhaps ending successfully.
+# Databases in this list MUST compile successfully during a commit, or the
+# entire commit will fail. List the databases your application will actually
+# be using to ensure your updates to that database work properly.
+# This must be a list; example: ['postgres','sqlite']
+required_dbs=[]
+
+# When creating new change scripts, Migrate will stamp the new script with
+# a version number. By default this is latest_version + 1. You can set this
+# to 'true' to tell Migrate to use the UTC timestamp instead.
+use_timestamp_numbering=False
diff --git a/db_repo/versions/001_Analyze_tables.py b/db_repo/versions/001_Analyze_tables.py
new file mode 100644
index 0000000..3eb29fd
--- /dev/null
+++ b/db_repo/versions/001_Analyze_tables.py
@@ -0,0 +1,54 @@
+from sqlalchemy import Table, Column, Integer, Unicode, Boolean, MetaData, ForeignKey, Float, Index
+
+meta = MetaData()
+
+user = Table(
+    "users", meta,
+    Column("id", Integer, primary_key=True),
+    Column("opt_out", Boolean, default=False, nullable=False),
+    Column("name", Unicode(120), nullable=False, index=True, unique=True)
+)
+
+repository = Table(
+    "repositories", meta,
+    Column("id", Integer, primary_key=True),
+    Column("user_id", ForeignKey("users.id"), nullable=False),
+    Column("name", Unicode(120), nullable=False, index=True),
+    Column("stargazers_count", Integer, nullable=False),
+    Column("fork", Boolean, nullable=False),
+    Column("default_branch", Unicode(80), nullable=False),
+    Column("archived", Boolean, nullable=False),
+    Column("updated_at", Integer, comment="Value from GitHub API", nullable=False, index=True),
+    Column("created_at", Integer, comment="Value from GitHub API", nullable=False),
+    Column("size", Integer, nullable=False, comment="Value from GitHub API"),
+    Column("private", Boolean, nullable=False),
+)
+
+
+analyze_task = Table(
+    "analyze_tasks", meta,
+     Column("id", Integer, primary_key=True),
+     Column("repository_id", ForeignKey("repositories.id"), nullable=False, index=True),
+     Column("duration", Float, nullable=False, index=True),
+     Column("created_at", Integer, nullable=False, index=True),
+     Column("worker", Unicode(80), nullable=False, index=True),
+     Column("level", Integer, nullable=False),
+     Column("url", Unicode(200), nullable=False),
+     Column("improvement_absolute", Integer, nullable=False, index=True),
+     Column("improvement_relative", Float, nullable=False, index=True)
+)
+
+
+def upgrade(migrate_engine):
+    meta.bind = migrate_engine
+    meta.reflect()
+    user.create()
+    repository.create()
+    analyze_task.create()
+
+
+def downgrade(migrate_engine):
+    meta.bind = migrate_engine
+    user.drop()
+    repository.drop()
+    analyze_task.drop()
diff --git a/db_repo/versions/002_unique_repositories_index.py b/db_repo/versions/002_unique_repositories_index.py
new file mode 100644
index 0000000..77cb443
--- /dev/null
+++ b/db_repo/versions/002_unique_repositories_index.py
@@ -0,0 +1,24 @@
+from sqlalchemy import Table, MetaData, Index
+
+meta = MetaData()
+
+
+def _get_indices(meta):
+    meta.reflect()
+    Users = Table("users", meta, autoload=True, autoload_with=meta.bind)
+    Repositories = Table("users", meta, autoload=True, autoload_with=meta.bind)
+    return [
+        Index("repositories_name_unique_id", Users.c.id, Repositories.c.name, unique=True)
+    ]
+
+
+def upgrade(migrate_engine):
+    meta.bind = migrate_engine
+    for idx in _get_indices(meta):
+        idx.create()
+
+
+def downgrade(migrate_engine):
+    meta.bind = migrate_engine
+    for idx in _get_indices(meta):
+        idx.drop()
diff --git a/db_repo/versions/003_clone_duration_column.py b/db_repo/versions/003_clone_duration_column.py
new file mode 100644
index 0000000..0d68909
--- /dev/null
+++ b/db_repo/versions/003_clone_duration_column.py
@@ -0,0 +1,26 @@
+from sqlalchemy import Table, MetaData, Column, Float
+
+meta = MetaData()
+
+
+def _get_table(meta):
+    meta.reflect()
+    AnalyzeTask = Table("analyze_tasks", meta, autoload=True, autoload_with=meta.bind)
+    return AnalyzeTask
+
+
+def _get_column():
+    return Column("clone_duration", Float, nullable=False, default=0, server_default="0")
+
+
+def upgrade(migrate_engine):
+    meta.bind = migrate_engine
+    table = _get_table(meta)
+    col = _get_column()
+    col.create(table, populate_default=True)
+
+
+def downgrade(migrate_engine):
+    meta.bind = migrate_engine
+    table = _get_table(meta)
+    table.c.clone_duration.drop()
diff --git a/db_repo/versions/004_task_status_column.py b/db_repo/versions/004_task_status_column.py
new file mode 100644
index 0000000..751174e
--- /dev/null
+++ b/db_repo/versions/004_task_status_column.py
@@ -0,0 +1,38 @@
+from sqlalchemy import Table, MetaData, Column, Integer, Index
+
+meta = MetaData()
+
+
+def _get_table(meta):
+    meta.reflect()
+    AnalyzeTask = Table("analyze_tasks", meta, autoload=True, autoload_with=meta.bind)
+    return AnalyzeTask
+
+
+def _get_column():
+    return Column("status", Integer, nullable=False, default=0, server_default="2")
+
+
+def _get_indices(meta):
+    meta.reflect()
+    AnalyzeTask = Table("analyze_tasks", meta, autoload=True, autoload_with=meta.bind)
+    return [
+        Index("analyze_tasks_status_idx", AnalyzeTask.c.status, unique=False)
+    ]
+
+
+def upgrade(migrate_engine):
+    meta.bind = migrate_engine
+    table = _get_table(meta)
+    col = _get_column()
+    col.create(table, populate_default=True)
+    for idx in _get_indices(meta):
+        idx.create()
+
+
+def downgrade(migrate_engine):
+    meta.bind = migrate_engine
+    table = _get_table(meta)
+    table.c.status.drop()
+    for idx in _get_indices(meta):
+        idx.drop()
diff --git a/db_repo/versions/__init__.py b/db_repo/versions/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/process_responses.py b/process_responses.py
new file mode 100644
index 0000000..ad3d6ae
--- /dev/null
+++ b/process_responses.py
@@ -0,0 +1,38 @@
+import json
+import logging
+
+from src.settings import RABBIT_REPLY_QUEUE, init_logging
+from src.rabbit import get_channel, send_task, consume_task
+from src.db import AnalyzeTask, DBSession, TaskStatus
+from src.messages import AnalyzeResponse
+
+
+def main():
+    session = DBSession()
+    channel = get_channel()
+    for data in consume_task(channel, RABBIT_REPLY_QUEUE, max_count=10):
+        data = data.decode("utf-8")
+        raw_reply = json.loads(data)
+        task_id = raw_reply["task_id"]
+        logging.info(f"New response: {raw_reply}")
+        response = AnalyzeResponse.from_data(raw_reply)
+        db_task = session.query(AnalyzeTask).filter(AnalyzeTask.id == task_id).first()
+        if db_task is None:
+            logging.warning(f"task_id {task_id} not found in DB")
+            continue
+        if raw_reply["status"] == "error":
+            db_task.status = TaskStatus.Error
+            logging.error(f"Error {raw_reply['message']} with task_id {task_id} not found in DB")
+            continue
+        db_task.status = TaskStatus.Success
+        db_task.clone_duration = response.clone_duration
+        db_task.duration = response.duration
+        db_task.improvement_absolute = response.improvement_absolute
+        db_task.improvement_relative = response.improvement_relative
+        db_task.worker = response.worker
+        session.commit()
+
+
+if __name__ == "__main__":
+    init_logging()
+    main()
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..228909c
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,6 @@
+PyGithub
+tqdm
+requests
+python-magic
+sqlalchemy-migrate
+pika
diff --git a/src/__init__.py b/src/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/db.py b/src/db.py
new file mode 100644
index 0000000..f2d77ec
--- /dev/null
+++ b/src/db.py
@@ -0,0 +1,65 @@
+import datetime
+
+from sqlalchemy import create_engine, Column, Integer, Unicode, Boolean, Float, ForeignKey
+from sqlalchemy.orm import sessionmaker, relationship
+from sqlalchemy.ext.declarative import declarative_base
+
+from src.settings import DB_PATH
+
+Base = declarative_base()
+
+
+class TaskStatus:
+    Error = 0
+    InQueue = 1
+    Success = 2
+
+
+class User(Base):
+    __tablename__ = "users"
+    id = Column(Integer, primary_key=True)
+    # updated_at = Column(
+    #     "updated_at", Integer, onupdate=lambda: int(datetime.datetime.now().timestamp())
+    # )
+    opt_out = Column(Boolean, default=False, nullable=False)
+    name = Column(Unicode(120), nullable=False, index=True, unique=True)
+
+
+class Repository(Base):
+    __tablename__ = "repositories"
+    id = Column(Integer, primary_key=True)
+    user_id = Column(ForeignKey("users.id"), nullable=False)
+    user = relationship(User)
+    tasks = relationship("AnalyzeTask")
+    name = Column(Unicode(120), nullable=False, index=True)
+    stargazers_count = Column(Integer, nullable=False)
+    fork = Column(Boolean, nullable=False)
+    default_branch = Column(Unicode(80), nullable=False)
+    archived = Column(Boolean, nullable=False)
+    updated_at = Column(Integer, comment="Value from GitHub API", nullable=False, index=True)
+    created_at = Column(Integer, comment="Value from GitHub API", nullable=False)
+    size = Column(Integer, nullable=False, comment="Value from GitHub API")
+    private = Column(Boolean, nullable=False)
+
+    def get_clone_url(self):
+        return f"git@github.com:{self.user.name}/{self.name}"
+
+
+class AnalyzeTask(Base):
+    __tablename__ = "analyze_tasks"
+    id = Column(Integer, primary_key=True)
+    repository_id = Column(ForeignKey("repositories.id"), nullable=False)
+    status = Column(Integer, default=TaskStatus.InQueue,nullable=False, index=True)
+    repository = relationship(Repository)
+    clone_duration = Column(Float, default=0., nullable=False, index=True)
+    duration = Column(Float, default=0., nullable=False, index=True)
+    created_at = Column(Integer, default=lambda: int(datetime.datetime.now().timestamp()), nullable=False, index=True)
+    worker = Column(Unicode(80), default="", nullable=False, index=True)
+    level = Column(Integer, default=0, nullable=False)
+    url = Column(Unicode(200), default="", nullable=False)
+    improvement_absolute = Column(Integer, default=0, nullable=False, index=True)
+    improvement_relative = Column(Float, default=0., nullable=False, index=True)
+
+
+_engine = create_engine(DB_PATH)
+DBSession = sessionmaker(bind=_engine)
\ No newline at end of file
diff --git a/src/git.py b/src/git.py
new file mode 100644
index 0000000..e7300b2
--- /dev/null
+++ b/src/git.py
@@ -0,0 +1,45 @@
+import logging
+import subprocess
+import os
+import shlex
+
+from src.settings import GIT_PRIVATE_KEY_PATH
+
+_logger = logging.getLogger(__name__)
+_logger.addHandler(logging.NullHandler())
+
+os.environ['GIT_SSH_COMMAND'] = f"ssh -i {shlex.quote(GIT_PRIVATE_KEY_PATH)} -o IdentitiesOnly=yes"
+
+
+def _check_preconditions():
+    assert subprocess.check_call(["git", "--version"]) == 0
+
+
+def clone_repo(ssh_url: str, path: str):
+    subprocess.check_call(["git", "clone", ssh_url, path], stdout=subprocess.DEVNULL)
+
+
+def create_and_open_branch(repo_path: str, branch_name: str):
+    subprocess.check_call(
+        ["git", "checkout", "-b", branch_name], cwd=repo_path, stdout=subprocess.DEVNULL
+    )
+
+
+def commit_and_push(repo_path: str, commit_message: str):
+    subprocess.check_call(["git", "add", "."], cwd=repo_path, stdout=subprocess.DEVNULL)
+    subprocess.check_call(
+        ["git", "commit", "-m", commit_message], cwd=repo_path, stdout=subprocess.DEVNULL
+    )
+    branches = subprocess.check_output(
+        ["git", "branch"], cwd=repo_path
+    ).decode("utf-8")
+    current_branch = next(filter(lambda x: x.startswith("*"), branches.splitlines()))[1:].strip()
+    _logger.info(f"pushing branch {current_branch} in repo {repo_path}")
+    subprocess.check_call(
+        ["git", "push", "--set-upstream", "origin", current_branch],
+        cwd=repo_path,
+        stdout=subprocess.DEVNULL,
+    )
+
+
+_check_preconditions()
diff --git a/src/github.py b/src/github.py
new file mode 100644
index 0000000..5a151ef
--- /dev/null
+++ b/src/github.py
@@ -0,0 +1,46 @@
+import logging
+import subprocess
+
+from github import Github, Repository, PullRequest
+
+_logger = logging.getLogger(__name__)
+_logger.addHandler(logging.NullHandler())
+
+
+_g = Github("993d405e652f72a58f64750a7cd6ac9052e01bd2")
+user_login = _g.get_user().login
+
+# def _fork_repo(r: Repository) -> Repository:
+#     r = _g.get_user().create_fork(r)
+#     return r
+
+#     print(r.size, r.stargazers_coun>t)
+
+
+def create_fork(r: Repository) -> Repository:
+    return _g.get_user().create_fork(r)
+
+
+def to_repository(full_name: str) -> Repository:
+    return _g.get_repo(full_name)
+
+
+def get_possible_repos():
+    return [_g.get_repo("AlekseyLobanov/CrossGen")]
+
+
+def create_pr(
+    base_repo: Repository, branch: str, title: str, body: str, master: str = "master"
+) -> PullRequest:
+    base_repo.create_pull(
+        title=title,
+        body=body,
+        head=f"{user_login}:{branch}",
+        base=master,
+        draft=True,
+        maintainer_can_modify=True,
+    )
+
+
+def is_for_fork(r: Repository):
+    return not r.fork
diff --git a/src/messages.py b/src/messages.py
new file mode 100644
index 0000000..bf03517
--- /dev/null
+++ b/src/messages.py
@@ -0,0 +1,106 @@
+import datetime
+import platform
+from typing import Optional
+
+
+class AnalyzeTask:
+    def __init__(self):
+        self.created_at = 0
+        self.url = ""
+        self.level = -1
+        self.task_id = -1
+
+    @classmethod
+    def from_data(cls, data):
+        res = cls()
+        res.created_at = data["created_at"]
+        res.url = data["url"]
+        res.level = data["level"]
+        res.task_id = data["task_id"]
+        return res
+
+    @property
+    def data(self):
+        return {
+            "created_at": self.created_at,
+            "url": self.url,
+            "level": self.level,
+            "task_id": self.task_id,
+        }
+
+
+class AnalyzeResponse:
+    def __init__(self):
+        self.created_at = 0
+        self.url = ""
+        self.level = -1
+        self.task_id = -1
+        self.clone_duration = 0.0
+        self.duration = 0.0
+        self.improvement_absolute = 0
+        self.improvement_relative = 0
+        self.worker = ""
+    
+    @classmethod
+    def from_data(cls, data):
+        res = cls()
+        res.created_at = data["created_at"]
+        res.url = data["url"]
+        res.level = data["level"]
+        res.task_id = data["task_id"]
+        res.duration = data["duration"]
+        res.clone_duration = data["clone_duration"]
+        res.worker = data["worker"]
+        res.improvement_absolute = data["improvement_absolute"]
+        res.improvement_relative = data["improvement_relative"]
+        return res
+
+    @property
+    def data(self):
+        if self.task_id < 0:
+            raise RuntimeError("No task_id")
+        return {
+            "created_at": self.created_at,
+            "url": self.url,
+            "level": self.level,
+            "task_id": self.task_id,
+            "duration": self.duration,
+            "clone_duration": self.clone_duration,
+            "worker": self.worker,
+            "improvement_absolute": self.improvement_absolute,
+            "improvement_relative": self.improvement_relative,
+        }
+
+
+def create_analyze_task(url: str, level: int, task_id: Optional[int] = None) -> AnalyzeTask:
+    res = AnalyzeTask()
+    res.created_at = int(datetime.datetime.now().timestamp())
+    res.url = url
+    res.level = level
+    res.task_id = task_id
+    return res
+
+
+def create_analyze_response(
+        task: AnalyzeTask,
+        initial_size: int,
+        final_size: int,
+        duration: float,
+        worker: str = platform.node(),
+        clone_duration: float = 0,
+
+) -> AnalyzeResponse:
+    res = AnalyzeResponse()
+    res.created_at = task.created_at
+    res.url = task.url
+    res.level = task.level
+    res.task_id = task.task_id
+    res.clone_duration = clone_duration
+    res.duration = duration
+    res.worker = worker
+    if initial_size < 100:
+        res.improvement_absolute = res.improvement_relative = 0
+    else:
+        res.improvement_absolute = initial_size - final_size
+        res.improvement_relative = 1 - final_size / initial_size
+    return res
diff --git a/tests/base_test.py b/tests/base_test.py
new file mode 100644
index 0000000..d2fcda5
--- /dev/null
+++ b/tests/base_test.py
@@ -0,0 +1,2 @@
+def test_nothing():
+    assert True
\ No newline at end of file
diff --git a/worker-compose.yaml b/worker-compose.yaml
new file mode 100644
index 0000000..e69de29