diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..8ea3db5
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,11 @@
+# HarborForge Environment Variables
+
+# Database
+MYSQL_ROOT_PASSWORD=harborforge_root
+MYSQL_DATABASE=harborforge
+MYSQL_USER=harborforge
+MYSQL_PASSWORD=harborforge_pass
+
+# Application
+SECRET_KEY=change-me-use-openssl-rand-hex-32
+LOG_LEVEL=INFO
diff --git a/backend/Dockerfile b/backend/Dockerfile
new file mode 100644
index 0000000..d782d96
--- /dev/null
+++ b/backend/Dockerfile
@@ -0,0 +1,23 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    default-libmysqlclient-dev \
+    pkg-config \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Expose port
+EXPOSE 8000
+
+# Run the application
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
diff --git a/backend/app/__init__.py b/backend/app/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/app/api/__init__.py b/backend/app/api/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/app/core/__init__.py b/backend/app/core/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/app/core/config.py b/backend/app/core/config.py
new file mode 100644
index 0000000..09cd622
--- /dev/null
+++ b/backend/app/core/config.py
@@ -0,0 +1,31 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from pydantic_settings import BaseSettings
+from typing import Optional
+
+
+class Settings(BaseSettings):
+    DATABASE_URL: str = "mysql+pymysql://harborforge:harborforge_pass@mysql:3306/harborforge"
+    SECRET_KEY: str = "change-me-in-production"
+    LOG_LEVEL: str = "INFO"
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()
+
+engine = create_engine(settings.DATABASE_URL, pool_pre_ping=True)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
diff --git a/backend/app/main.py b/backend/app/main.py
new file mode 100644
index 0000000..8b60f07
--- /dev/null
+++ b/backend/app/main.py
@@ -0,0 +1,190 @@
+from fastapi import FastAPI, Depends, HTTPException, status
+from fastapi.middleware.cors import CORSMiddleware
+from sqlalchemy.orm import Session
+from typing import List
+
+from app.core.config import get_db, settings
+from app.models import models
+from app.schemas import schemas
+
+app = FastAPI(
+    title="HarborForge API",
+    description="Agent/人类协同任务管理平台 API",
+    version="0.1.0"
+)
+
+# CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+# Health check
+@app.get("/health")
+def health_check():
+    return {"status": "healthy"}
+
+
+# ============ Issues API ============
+
+@app.post("/issues", response_model=schemas.IssueResponse, status_code=status.HTTP_201_CREATED)
+def create_issue(issue: schemas.IssueCreate, db: Session = Depends(get_db)):
+    db_issue = models.Issue(**issue.model_dump())
+    db.add(db_issue)
+    db.commit()
+    db.refresh(db_issue)
+    return db_issue
+
+
+@app.get("/issues", response_model=List[schemas.IssueResponse])
+def list_issues(
+    project_id: int = None,
+    status: str = None,
+    issue_type: str = None,
+    skip: int = 0,
+    limit: int = 100,
+    db: Session = Depends(get_db)
+):
+    query = db.query(models.Issue)
+    
+    if project_id:
+        query = query.filter(models.Issue.project_id == project_id)
+    if status:
+        query = query.filter(models.Issue.status == status)
+    if issue_type:
+        query = query.filter(models.Issue.issue_type == issue_type)
+    
+    issues = query.offset(skip).limit(limit).all()
+    return issues
+
+
+@app.get("/issues/{issue_id}", response_model=schemas.IssueResponse)
+def get_issue(issue_id: int, db: Session = Depends(get_db)):
+    issue = db.query(models.Issue).filter(models.Issue.id == issue_id).first()
+    if not issue:
+        raise HTTPException(status_code=404, detail="Issue not found")
+    return issue
+
+
+@app.patch("/issues/{issue_id}", response_model=schemas.IssueResponse)
+def update_issue(issue_id: int, issue_update: schemas.IssueUpdate, db: Session = Depends(get_db)):
+    issue = db.query(models.Issue).filter(models.Issue.id == issue_id).first()
+    if not issue:
+        raise HTTPException(status_code=404, detail="Issue not found")
+    
+    update_data = issue_update.model_dump(exclude_unset=True)
+    for field, value in update_data.items():
+        setattr(issue, field, value)
+    
+    db.commit()
+    db.refresh(issue)
+    return issue
+
+
+@app.delete("/issues/{issue_id}", status_code=status.HTTP_204_NO_CONTENT)
+def delete_issue(issue_id: int, db: Session = Depends(get_db)):
+    issue = db.query(models.Issue).filter(models.Issue.id == issue_id).first()
+    if not issue:
+        raise HTTPException(status_code=404, detail="Issue not found")
+    
+    db.delete(issue)
+    db.commit()
+    return None
+
+
+# ============ Comments API ============
+
+@app.post("/comments", response_model=schemas.CommentResponse, status_code=status.HTTP_201_CREATED)
+def create_comment(comment: schemas.CommentCreate, db: Session = Depends(get_db)):
+    db_comment = models.Comment(**comment.model_dump())
+    db.add(db_comment)
+    db.commit()
+    db.refresh(db_comment)
+    return db_comment
+
+
+@app.get("/issues/{issue_id}/comments", response_model=List[schemas.CommentResponse])
+def list_comments(issue_id: int, db: Session = Depends(get_db)):
+    comments = db.query(models.Comment).filter(models.Comment.issue_id == issue_id).all()
+    return comments
+
+
+# ============ Projects API ============
+
+@app.post("/projects", response_model=schemas.ProjectResponse, status_code=status.HTTP_201_CREATED)
+def create_project(project: schemas.ProjectCreate, db: Session = Depends(get_db)):
+    db_project = models.Project(**project.model_dump())
+    db.add(db_project)
+    db.commit()
+    db.refresh(db_project)
+    return db_project
+
+
+@app.get("/projects", response_model=List[schemas.ProjectResponse])
+def list_projects(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    projects = db.query(models.Project).offset(skip).limit(limit).all()
+    return projects
+
+
+@app.get("/projects/{project_id}", response_model=schemas.ProjectResponse)
+def get_project(project_id: int, db: Session = Depends(get_db)):
+    project = db.query(models.Project).filter(models.Project.id == project_id).first()
+    if not project:
+        raise HTTPException(status_code=404, detail="Project not found")
+    return project
+
+
+# ============ Users API ============
+
+@app.post("/users", response_model=schemas.UserResponse, status_code=status.HTTP_201_CREATED)
+def create_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
+    # Check if username or email exists
+    existing = db.query(models.User).filter(
+        (models.User.username == user.username) | (models.User.email == user.email)
+    ).first()
+    if existing:
+        raise HTTPException(status_code=400, detail="Username or email already exists")
+    
+    # Hash password if provided
+    hashed_password = None
+    if user.password:
+        from passlib.context import CryptContext
+        pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+        hashed_password = pwd_context.hash(user.password)
+    
+    db_user = models.User(
+        username=user.username,
+        email=user.email,
+        full_name=user.full_name,
+        hashed_password=hashed_password,
+        is_admin=user.is_admin
+    )
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
+
+
+@app.get("/users", response_model=List[schemas.UserResponse])
+def list_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    users = db.query(models.User).offset(skip).limit(limit).all()
+    return users
+
+
+@app.get("/users/{user_id}", response_model=schemas.UserResponse)
+def get_user(user_id: int, db: Session = Depends(get_db)):
+    user = db.query(models.User).filter(models.User.id == user_id).first()
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+    return user
+
+
+# Run database migration on startup
+@app.on_event("startup")
+def startup():
+    from app.core.config import Base, engine
+    Base.metadata.create_all(bind=engine)
diff --git a/backend/app/models/__init__.py b/backend/app/models/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/app/models/models.py b/backend/app/models/models.py
new file mode 100644
index 0000000..6475e97
--- /dev/null
+++ b/backend/app/models/models.py
@@ -0,0 +1,122 @@
+from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, Enum, Boolean
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.core.config import Base
+import enum
+
+
+class IssueType(str, enum.Enum):
+    TASK = "task"
+    STORY = "story"
+    TEST = "test"
+    RESOLUTION = "resolution"  # 决议案 - 用于 Agent 僵局提交
+
+
+class IssueStatus(str, enum.Enum):
+    OPEN = "open"
+    IN_PROGRESS = "in_progress"
+    RESOLVED = "resolved"
+    CLOSED = "closed"
+    BLOCKED = "blocked"
+
+
+class IssuePriority(str, enum.Enum):
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+    CRITICAL = "critical"
+
+
+class Issue(Base):
+    __tablename__ = "issues"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(255), nullable=False)
+    description = Column(Text, nullable=True)
+    issue_type = Column(Enum(IssueType), default=IssueType.TASK)
+    status = Column(Enum(IssueStatus), default=IssueStatus.OPEN)
+    priority = Column(Enum(IssuePriority), default=IssuePriority.MEDIUM)
+    
+    # Relationships
+    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)
+    reporter_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    assignee_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    
+    # Resolution specific fields (for RESOLUTION type)
+    resolution_summary = Column(Text, nullable=True)  # 僵局摘要
+    positions = Column(Text, nullable=True)  # 各方立场 (JSON)
+    pending_matters = Column(Text, nullable=True)  # 待决事项
+    
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    # Tags (comma-separated for simplicity)
+    tags = Column(String(500), nullable=True)
+    
+    # Dependencies
+    depends_on_id = Column(Integer, ForeignKey("issues.id"), nullable=True)
+    
+    project = relationship("Project", back_populates="issues")
+    reporter = relationship("User", foreign_keys=[reporter_id], back_populates="reported_issues")
+    assignee = relationship("User", foreign_keys=[assignee_id], back_populates="assigned_issues")
+    comments = relationship("Comment", back_populates="issue", cascade="all, delete-orphan")
+
+
+class Comment(Base):
+    __tablename__ = "comments"
+
+    id = Column(Integer, primary_key=True, index=True)
+    content = Column(Text, nullable=False)
+    issue_id = Column(Integer, ForeignKey("issues.id"), nullable=False)
+    author_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    issue = relationship("Issue", back_populates="comments")
+    author = relationship("User", back_populates="comments")
+
+
+class Project(Base):
+    __tablename__ = "projects"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(100), unique=True, nullable=False)
+    description = Column(Text, nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    
+    owner_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    
+    issues = relationship("Issue", back_populates="project", cascade="all, delete-orphan")
+    members = relationship("ProjectMember", back_populates="project", cascade="all, delete-orphan")
+    owner = relationship("User", back_populates="owned_projects")
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, nullable=False)
+    email = Column(String(100), unique=True, nullable=False)
+    hashed_password = Column(String(255), nullable=True)  # Nullable for OAuth users
+    full_name = Column(String(100), nullable=True)
+    is_active = Column(Boolean, default=True)
+    is_admin = Column(Boolean, default=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    
+    owned_projects = relationship("Project", back_populates="owner")
+    reported_issues = relationship("Issue", foreign_keys=[Issue.reporter_id], back_populates="reporter")
+    assigned_issues = relationship("Issue", foreign_keys=[Issue.assignee_id], back_populates="assignee")
+    comments = relationship("Comment", back_populates="author")
+    project_memberships = relationship("ProjectMember", back_populates="user")
+
+
+class ProjectMember(Base):
+    __tablename__ = "project_members"
+
+    id = Column(Integer, primary_key=True, index=True)
+    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    role = Column(String(20), default="dev")  # admin, dev, mgr, ops
+    
+    project = relationship("Project", back_populates="members")
+    user = relationship("User", back_populates="project_memberships")
diff --git a/backend/app/schemas/__init__.py b/backend/app/schemas/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/app/schemas/schemas.py b/backend/app/schemas/schemas.py
new file mode 100644
index 0000000..956a67b
--- /dev/null
+++ b/backend/app/schemas/schemas.py
@@ -0,0 +1,165 @@
+from pydantic import BaseModel
+from typing import Optional, List
+from datetime import datetime
+from enum import Enum
+
+
+class IssueTypeEnum(str, Enum):
+    TASK = "task"
+    STORY = "story"
+    TEST = "test"
+    RESOLUTION = "resolution"
+
+
+class IssueStatusEnum(str, Enum):
+    OPEN = "open"
+    IN_PROGRESS = "in_progress"
+    RESOLVED = "resolved"
+    CLOSED = "closed"
+    BLOCKED = "blocked"
+
+
+class IssuePriorityEnum(str, Enum):
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+    CRITICAL = "critical"
+
+
+# Issue schemas
+class IssueBase(BaseModel):
+    title: str
+    description: Optional[str] = None
+    issue_type: IssueTypeEnum = IssueTypeEnum.TASK
+    priority: IssuePriorityEnum = IssuePriorityEnum.MEDIUM
+    tags: Optional[str] = None
+    depends_on_id: Optional[int] = None
+
+
+class IssueCreate(IssueBase):
+    project_id: int
+    reporter_id: int
+    assignee_id: Optional[int] = None
+    # Resolution specific
+    resolution_summary: Optional[str] = None
+    positions: Optional[str] = None
+    pending_matters: Optional[str] = None
+
+
+class IssueUpdate(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    status: Optional[IssueStatusEnum] = None
+    priority: Optional[IssuePriorityEnum] = None
+    assignee_id: Optional[int] = None
+    tags: Optional[str] = None
+    depends_on_id: Optional[int] = None
+    # Resolution specific
+    resolution_summary: Optional[str] = None
+    positions: Optional[str] = None
+    pending_matters: Optional[str] = None
+
+
+class IssueResponse(IssueBase):
+    id: int
+    status: IssueStatusEnum
+    project_id: int
+    reporter_id: int
+    assignee_id: Optional[int]
+    resolution_summary: Optional[str]
+    positions: Optional[str]
+    pending_matters: Optional[str]
+    created_at: datetime
+    updated_at: Optional[datetime]
+    
+    class Config:
+        from_attributes = True
+
+
+# Comment schemas
+class CommentBase(BaseModel):
+    content: str
+
+
+class CommentCreate(CommentBase):
+    issue_id: int
+    author_id: int
+
+
+class CommentUpdate(BaseModel):
+    content: Optional[str] = None
+
+
+class CommentResponse(CommentBase):
+    id: int
+    issue_id: int
+    author_id: int
+    created_at: datetime
+    updated_at: Optional[datetime]
+    
+    class Config:
+        from_attributes = True
+
+
+# Project schemas
+class ProjectBase(BaseModel):
+    name: str
+    description: Optional[str] = None
+
+
+class ProjectCreate(ProjectBase):
+    owner_id: int
+
+
+class ProjectUpdate(BaseModel):
+    name: Optional[str] = None
+    description: Optional[str] = None
+
+
+class ProjectResponse(ProjectBase):
+    id: int
+    owner_id: int
+    created_at: datetime
+    
+    class Config:
+        from_attributes = True
+
+
+# User schemas
+class UserBase(BaseModel):
+    username: str
+    email: str
+    full_name: Optional[str] = None
+
+
+class UserCreate(UserBase):
+    password: Optional[str] = None
+    is_admin: bool = False
+
+
+class UserResponse(UserBase):
+    id: int
+    is_active: bool
+    is_admin: bool
+    created_at: datetime
+    
+    class Config:
+        from_attributes = True
+
+
+# Project Member schemas
+class ProjectMemberBase(BaseModel):
+    user_id: int
+    project_id: int
+    role: str = "dev"
+
+
+class ProjectMemberCreate(ProjectMemberBase):
+    pass
+
+
+class ProjectMemberResponse(ProjectMemberBase):
+    id: int
+    
+    class Config:
+        from_attributes = True
diff --git a/backend/app/services/__init__.py b/backend/app/services/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/requirements.txt b/backend/requirements.txt
new file mode 100644
index 0000000..9623ca0
--- /dev/null
+++ b/backend/requirements.txt
@@ -0,0 +1,11 @@
+fastapi==0.109.0
+uvicorn[standard]==0.27.0
+sqlalchemy==2.0.25
+pymysql==1.1.0
+pydantic==2.5.3
+pydantic-settings==2.1.0
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4
+python-multipart==0.0.6
+alembic==1.13.1
+python-dotenv==1.0.0
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..214f113
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,91 @@
+version: '3.8'
+
+services:
+  # MySQL Database
+  mysql:
+    image: mysql:8.0
+    container_name: harborforge-mysql
+    restart: unless-stopped
+    environment:
+      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD:-harborforge_root}
+      MYSQL_DATABASE: ${MYSQL_DATABASE:-harborforge}
+      MYSQL_USER: ${MYSQL_USER:-harborforge}
+      MYSQL_PASSWORD: ${MYSQL_PASSWORD:-harborforge_pass}
+    volumes:
+      - mysql_data:/var/lib/mysql
+    ports:
+      - "3306:3306"
+    networks:
+      - harborforge
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    deploy:
+      resources:
+        limits:
+          cpus: '0.5'
+          memory: 512M
+
+  # FastAPI Backend
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: harborforge-backend
+    restart: unless-stopped
+    environment:
+      DATABASE_URL: mysql+pymysql://${MYSQL_USER:-harborforge}:${MYSQL_PASSWORD:-harborforge_pass}@mysql:3306/${MYSQL_DATABASE:-harborforge}
+      SECRET_KEY: ${SECRET_KEY:-change_me_in_production}
+      LOG_LEVEL: ${LOG_LEVEL:-INFO}
+    ports:
+      - "8000:8000"
+    depends_on:
+      mysql:
+        condition: service_healthy
+    networks:
+      - harborforge
+    volumes:
+      - ./backend:/app
+    deploy:
+      resources:
+        limits:
+          cpus: '0.5'
+          memory: 512M
+
+  # React Frontend (optional, for future)
+  # frontend:
+  #   build:
+  #     context: ./frontend
+  #     dockerfile: Dockerfile
+  #   container_name: harborforge-frontend
+  #   restart: unless-stopped
+  #   ports:
+  #     - "3000:3000"
+  #   depends_on:
+  #     - backend
+  #   networks:
+  #     - harborforge
+  #   volumes:
+  #     - ./frontend:/app
+  #     - /app/node_modules
+
+  # CLI (run on demand)
+  # cli:
+  #   build:
+  #     context: ./cli
+  #     dockerfile: Dockerfile
+  #   volumes:
+  #     - ./cli:/app
+  #     - ~/.harborforge:/root/.harborforge
+  #   networks:
+  #     - harborforge
+
+networks:
+  harborforge:
+    driver: bridge
+
+volumes:
+  mysql_data:
+    driver: local