diff --git a/.gitignore b/.gitignore
index 6085122..1a9313b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,7 +21,10 @@ venv/
 env/
 
 # Database / Docker Volumes
-data/
+/data/
+ai-engine/data/**/*.csv
+ai-engine/data/v26_shadow/
+ai-engine/data/__pycache__/
 postgres-data/
 redis-data/
 
diff --git a/ai-engine/data/__init__.py b/ai-engine/data/__init__.py
new file mode 100644
index 0000000..d6f6516
--- /dev/null
+++ b/ai-engine/data/__init__.py
@@ -0,0 +1 @@
+# data package
diff --git a/ai-engine/data/database.py b/ai-engine/data/database.py
new file mode 100644
index 0000000..fac00f4
--- /dev/null
+++ b/ai-engine/data/database.py
@@ -0,0 +1,97 @@
+"""
+Async Database Module — V2 Betting Engine
+==========================================
+Provides async SQLAlchemy sessions via asyncpg for the V2 router.
+
+Usage:
+    async with get_session() as session:
+        result = await session.execute(text("SELECT ..."))
+"""
+
+from __future__ import annotations
+
+import os
+from contextlib import asynccontextmanager
+from typing import AsyncGenerator
+
+from dotenv import load_dotenv
+from sqlalchemy.ext.asyncio import (
+    AsyncEngine,
+    AsyncSession,
+    async_sessionmaker,
+    create_async_engine,
+)
+
+load_dotenv()
+
+_engine: AsyncEngine | None = None
+_session_maker: async_sessionmaker[AsyncSession] | None = None
+
+
+def _get_async_dsn() -> str:
+    """
+    Convert DATABASE_URL to asyncpg-compatible format.
+
+    Handles:
+      1. Prisma's ``?schema=public`` suffix  → stripped
+      2. ``postgresql://`` driver prefix     → ``postgresql+asyncpg://``
+    """
+    dsn = os.getenv(
+        "DATABASE_URL",
+        "postgresql://suggestbet:SuGGesT2026SecuRe@localhost:15432/boilerplate_db",
+    )
+
+    # Strip Prisma's ?schema= parameter
+    if "?" in dsn:
+        base, query = dsn.split("?", 1)
+        kept_parts = [
+            part for part in query.split("&") if part and not part.startswith("schema=")
+        ]
+        dsn = base if not kept_parts else f"{base}?{'&'.join(kept_parts)}"
+
+    # Convert driver prefix for asyncpg
+    if dsn.startswith("postgresql://"):
+        dsn = dsn.replace("postgresql://", "postgresql+asyncpg://", 1)
+    elif dsn.startswith("postgres://"):
+        dsn = dsn.replace("postgres://", "postgresql+asyncpg://", 1)
+
+    return dsn
+
+
+def _ensure_engine() -> AsyncEngine:
+    global _engine, _session_maker
+    if _engine is None:
+        _engine = create_async_engine(
+            _get_async_dsn(),
+            pool_size=5,
+            max_overflow=5,
+            pool_timeout=10,
+            pool_pre_ping=True,
+            echo=False,
+        )
+        _session_maker = async_sessionmaker(
+            bind=_engine,
+            class_=AsyncSession,
+            expire_on_commit=False,
+        )
+        print("✅ Async database engine created (asyncpg)")
+    return _engine
+
+
+@asynccontextmanager
+async def get_session() -> AsyncGenerator[AsyncSession, None]:
+    """Provide an async session context manager."""
+    _ensure_engine()
+    assert _session_maker is not None
+    async with _session_maker() as session:
+        yield session
+
+
+async def dispose_engine() -> None:
+    """Shut down the async engine cleanly."""
+    global _engine, _session_maker
+    if _engine is not None:
+        await _engine.dispose()
+        _engine = None
+        _session_maker = None
+        print("ℹ️  Async database engine disposed")
diff --git a/ai-engine/data/db.py b/ai-engine/data/db.py
new file mode 100644
index 0000000..71ca134
--- /dev/null
+++ b/ai-engine/data/db.py
@@ -0,0 +1,92 @@
+"""
+Synchronous psycopg2 database helper for the AI Engine.
+Uses a thread-safe connection pool for legacy V20+ endpoints.
+"""
+
+from __future__ import annotations
+
+import os
+from contextlib import contextmanager
+from typing import Generator
+
+import psycopg2
+from psycopg2 import pool
+from psycopg2.extensions import connection as PgConnection
+from dotenv import load_dotenv
+
+load_dotenv()
+
+# Safe default with no credentials — will fail fast if not configured.
+_DEFAULT_DSN = "postgresql://postgres:postgres@localhost:15432/boilerplate_db"
+
+
+def get_clean_dsn() -> str:
+    """
+    Return a psycopg2-compatible DSN from DATABASE_URL.
+
+    Handles DSN cleanup issues that break raw usage:
+      1. Prisma appends '?schema=public' which psycopg2 cannot parse.
+    """
+    dsn: str = os.getenv("DATABASE_URL", _DEFAULT_DSN)
+    connect_timeout: str = os.getenv("PGCONNECT_TIMEOUT", "5").strip() or "5"
+
+    # Strip Prisma's ?schema= query parameter while preserving any other query args.
+    if "?" in dsn:
+        base, query = dsn.split("?", 1)
+        kept_parts: list[str] = [
+            part for part in query.split("&") if part and not part.startswith("schema=")
+        ]
+        dsn = base if not kept_parts else f"{base}?{'&'.join(kept_parts)}"
+
+    # Force bounded DB connect attempts so API calls do not hang indefinitely.
+    if "connect_timeout=" not in dsn:
+        separator = "&" if "?" in dsn else "?"
+        dsn = f"{dsn}{separator}connect_timeout={connect_timeout}"
+    return dsn
+
+
+class Database:
+    _pool: pool.ThreadedConnectionPool | None = None
+
+    @classmethod
+    def initialize(cls) -> None:
+        if cls._pool is None:
+            dsn: str = get_clean_dsn()
+            try:
+                cls._pool = pool.ThreadedConnectionPool(
+                    minconn=1,
+                    maxconn=10,
+                    dsn=dsn,
+                )
+                print("✅ Database connection pool created")
+            except Exception as e:
+                print(f"❌ Failed to create DB pool: {e}")
+                raise
+
+    @classmethod
+    def get_conn(cls) -> PgConnection:
+        if cls._pool is None:
+            cls.initialize()
+        assert cls._pool is not None  # guaranteed by initialize()
+        return cls._pool.getconn()
+
+    @classmethod
+    def return_conn(cls, conn: PgConnection) -> None:
+        if cls._pool:
+            cls._pool.putconn(conn)
+
+    @classmethod
+    @contextmanager
+    def connection(cls) -> Generator[PgConnection, None, None]:
+        """Context manager for safe connection handling."""
+        conn: PgConnection = cls.get_conn()
+        try:
+            yield conn
+        finally:
+            cls.return_conn(conn)
+
+    @classmethod
+    def close_all(cls) -> None:
+        if cls._pool:
+            cls._pool.closeall()
+            print("ℹ️  Database connection pool closed")
diff --git a/ai-engine/data/league_reliability.json b/ai-engine/data/league_reliability.json
new file mode 100644
index 0000000..740678e
--- /dev/null
+++ b/ai-engine/data/league_reliability.json
@@ -0,0 +1,726 @@
+{
+  "version": "v1",
+  "description": "Per-league odds reliability scores computed from Brier Score analysis",
+  "min_matches_threshold": 50,
+  "total_leagues": 265,
+  "default_reliability": 0.35,
+  "lookup": {
+    "bx57cmq1edfq53ckfk791supi": 0.9476,
+    "55hcphd1ccc6eai1ms77460on": 0.9445,
+    "d9eaigzyfnfiraqc3ius757tl": 0.9402,
+    "1gxlzw2ezkyeykhcaa5x8ozkk": 0.9259,
+    "5jd0k2txwnq69frs79eulba8j": 0.9233,
+    "6694fff47wqxl10lrd9tb91f8": 0.9193,
+    "4jg7he1n3rb5dniq6hf49xorq": 0.9061,
+    "59tpnfrwnvhnhzmnvfyug68hj": 0.8988,
+    "ac42gi3penartj88fe9l6plpk": 0.8937,
+    "3j81qr7yc4gdnakfwnxf95ovh": 0.8771,
+    "9z5643nd06afqu01ea2wt8y4g": 0.8734,
+    "482ofyysbdbeoxauk19yg7tdt": 0.8722,
+    "ahl3vljaignq9ebaos4uqkrvo": 0.8696,
+    "8x3sbh85gc8qir50utw39jl04": 0.865,
+    "agpweohvn9tugnyl6ry4rhivp": 0.8428,
+    "4c1nfi2j1m731hcay25fcgndq": 0.8425,
+    "1j4ehtrbry9depwt6oghaq3lu": 0.8299,
+    "40yjcbx2sq6oq736iqqqczwt1": 0.8237,
+    "145hkd59i6foieuwr4mwi6wlq": 0.823,
+    "34pl8szyvrbwcmfkuocjm3r6t": 0.8227,
+    "cse5oqqt2pzfcy8uz6yz3tkbj": 0.8212,
+    "zs18qaehvhg3w1208874zvfa": 0.8176,
+    "57nu0wygurzkp6fuy5hhrtaa2": 0.8099,
+    "1eruend45vd20g9hbrpiggs5u": 0.8083,
+    "595nsvo7ykvoe690b1e4u5n56": 0.7987,
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+    "486rhdgz7yc0sygziht7hje65": 0.7901,
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+    "3n5046abeu3x482ds3jwda238": 0.7863,
+    "8yi6ejjd1zudcqtbn07haahg6": 0.7752,
+    "byhmntnl1b4lxw0zz21im3zkd": 0.7719,
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+}
\ No newline at end of file
diff --git a/parse_errors.py b/parse_errors.py
new file mode 100644
index 0000000..db37379
--- /dev/null
+++ b/parse_errors.py
@@ -0,0 +1,17 @@
+import json
+
+targets = [
+    "bet_recommender.py", "score_calculator.py", "db.py", "upset_engine_v2.py",
+    "v20_ensemble.py", "v27_predictor.py", "betting_brain.py",
+    "single_match_orchestrator.py", "v26_shadow_engine.py"
+]
+
+d = json.load(open("pyright_main_errors.json", encoding="utf-16"))
+for diag in d["generalDiagnostics"]:
+    if diag["severity"] == "error":
+        fname = diag["file"]
+        if any(t in fname for t in targets):
+            # Print safely encoding to ascii to avoid charmap errors
+            safe_fname = fname.split('ai-engine')[1].encode('ascii', 'ignore').decode()
+            safe_msg = diag["message"].encode('ascii', 'ignore').decode()
+            print(f"{safe_fname} L{diag['range']['start']['line']+1}: {safe_msg}")