diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bd5590b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,21 @@
+node_modules/
+.npmrc
+.env
+.env.*
+__tests__/
+coverage/
+.nyc_output/
+dist/
+build/
+.cache/
+*.log
+.DS_Store
+tmp/
+.tmp/
+__pycache__/
+*.pyc
+.venv/
+venv/
+*.egg-info/
+.pytest_cache/
+READY_TO_PUBLISH
diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..a64990d
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,28 @@
+# AGENTS.md
+
+Architecture and contribution rules for ExoRoute MVP (Deterministic Replay).
+
+Overview
+- ExoRoute is a cross-venue order routing orchestrator prototype with deterministic replay capabilities.
+- The design emphasizes privacy by design, governance provenance, and modular adapters.
+
+Tech Stack (current):
+- Language: Python 3.9+ (production-ready scaffolding)
+- Core concepts: LocalProblem, SharedVariables, PlanDelta, DualVariables, PrivacyBudget, AuditLog, GraphOfContractsRegistry
+- Adapters: exoroute.adapters.* (starter adapters: FIX/WebSocket feed, simulated venue)
+- Canonical bridge: exoroute.energi_bridge ( EnergiBridge-style interoperability layer)
+- Planning: exoroute.planner (naive ADMM-lite placeholder for MVP)
+- Delta storage: exoroute.delta_store (filesystem-based log of deltas)
+- API: exoroute.api (FastAPI endpoints) and exoroute.server (runner)
+
+Contribution Rules
+- Follow the coding style in current repo (Python with type hints, dataclasses).
+- Add unit tests where feasible; ensure test.sh passes.
+- Update AGENTS.md if architecture or testing requirements change.
+
+Testing and Local Run
+- To run API locally: python -m exoroute.server  # via entrypoint or uvicorn
+- Use test.sh (in repo root) to validate packaging and basic checks (to be added in patch).
+
+Decision Log
+- This document should be kept up to date with architectural shifts and interface changes.
diff --git a/README.md b/README.md
index ae40dcb..f5454b5 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # exoroute-cross-venue-order-routing-orche
 
-A vendor-agnostic, cross-venue order routing and hedging orchestrator for equities and derivatives that minimizes data exposure while maximizing execution quality. ExoRoute ingests venue feeds (FIX/WebSocket/REST), latency proxies, fees, spread, and 
\ No newline at end of file
+A vendor-agnostic, cross-venue order routing and hedging orchestrator for equities and derivatives that minimizes data exposure while maximizing execution quality. ExoRoute ingests venue feeds (FIX/WebSocket/REST), latency proxies, fees, spread, and 
diff --git a/exoroute/__init__.py b/exoroute/__init__.py
new file mode 100644
index 0000000..612881f
--- /dev/null
+++ b/exoroute/__init__.py
@@ -0,0 +1,9 @@
+from .core import LocalProblem, SharedVariables, PlanDelta, DualVariables, PrivacyBudget, AuditLog
+__all__ = [
+    "LocalProblem",
+    "SharedVariables",
+    "PlanDelta",
+    "DualVariables",
+    "PrivacyBudget",
+    "AuditLog",
+]
diff --git a/exoroute/adapters/__init__.py b/exoroute/adapters/__init__.py
new file mode 100644
index 0000000..b77dccd
--- /dev/null
+++ b/exoroute/adapters/__init__.py
@@ -0,0 +1 @@
+"""Adapters package for ExoRoute: starter adapters for price feeds and simulated venues."""
diff --git a/exoroute/adapters/fix_ws_feed.py b/exoroute/adapters/fix_ws_feed.py
new file mode 100644
index 0000000..4c1abf7
--- /dev/null
+++ b/exoroute/adapters/fix_ws_feed.py
@@ -0,0 +1,25 @@
+from __future__ import annotations
+import time
+from typing import Dict, Any
+
+class FIXWSFeedAdapter:
+    """Minimal FIX/WebSocket feed adapter scaffold.
+    Produces deterministic synthetic price signals for testing.
+    """
+    def __init__(self, endpoint: str = "wss://dummy-feed.example", symbol: str = "ABC"):
+        self.endpoint = endpoint
+        self.symbol = symbol
+        self._start = time.time()
+
+    def get_latest_signal(self) -> Dict[str, Any]:
+        t = time.time() - self._start
+        # Deterministic pseudo-price signal based on time
+        base = 100.0
+        price = base + (t * 0.5) + ((hash(self.symbol) & 0xFFFF) * 0.0001)
+        signal = {
+            "source": "FIXWS",
+            "symbol": self.symbol,
+            "price": round(price, 4),
+            "ts": time.time(),
+        }
+        return signal
diff --git a/exoroute/adapters/simulated_venue.py b/exoroute/adapters/simulated_venue.py
new file mode 100644
index 0000000..0f7f2ff
--- /dev/null
+++ b/exoroute/adapters/simulated_venue.py
@@ -0,0 +1,18 @@
+from __future__ import annotations
+import time
+from typing import Dict, Any
+
+class SimulatedVenueAdapter:
+    """A simple simulated venue adapter that emits synthetic data."""
+    def __init__(self, venue_id: str = "venue-1"):
+        self.venue_id = venue_id
+        self._start = time.time()
+
+    def get_latest_signal(self) -> Dict[str, Any]:
+        t = time.time() - self._start
+        price = 50.0 + (t * 0.3) + ((hash(self.venue_id) & 0xFFFF) * 0.00007)
+        return {
+            "venue": self.venue_id,
+            "price": round(price, 4),
+            "ts": time.time(),
+        }
diff --git a/exoroute/api.py b/exoroute/api.py
new file mode 100644
index 0000000..49a2e55
--- /dev/null
+++ b/exoroute/api.py
@@ -0,0 +1,64 @@
+from __future__ import annotations
+import time
+from typing import Dict, Any
+
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+from .delta_store import DeltaStore
+from .core import LocalProblem, SharedVariables, PlanDelta
+from .planner import naive_admm_lite_plan
+from .energi_bridge import EnergiBridge
+
+app = FastAPI(title="ExoRoute MVP API")
+
+delta_store = DeltaStore()
+
+
+class LocalProblemInput(BaseModel):
+    id: str
+    domain: str
+    assets: list[str]
+    objective: dict[str, object]
+    constraints: dict[str, object]
+
+
+class SignalPayload(BaseModel):
+    venue: str
+    price: float
+    ts: float
+
+
+@app.get("/")
+def read_root():
+    return {"status": "ok", "time": time.time()}
+
+
+@app.post("/signal")
+def submit_signal(payload: SignalPayload):
+    # For MVP, store signals in delta_store as part of a delta
+    delta = PlanDelta(delta={"venue": payload.venue, "price": payload.price, "ts": payload.ts})
+    delta_store.append_delta(delta)
+    return {"stored": True}
+
+
+@app.post("/local-problem")
+def create_local_problem(lp: LocalProblemInput):
+    lp_obj = LocalProblem(
+        id=lp.id,
+        domain=lp.domain,
+        assets=lp.assets,
+        objective=lp.objective,
+        constraints=lp.constraints,
+    )
+    # Create a minimal shared variable placeholder
+    shared = SharedVariables(forecasts={}, priors={}, version=1, timestamp=time.time())
+    delta = naive_admm_lite_plan({lp.id: {"price": 0.0}}, lp_obj, shared)
+    delta_store.append_delta(delta)
+    return delta.delta
+
+
+@app.get("/plan")
+def get_latest_plan():
+    deltas = delta_store.read_deltas()
+    return {"deltas": deltas[-5:]}  # last few for visibility
diff --git a/exoroute/core.py b/exoroute/core.py
new file mode 100644
index 0000000..609a753
--- /dev/null
+++ b/exoroute/core.py
@@ -0,0 +1,65 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Dict, List, Any
+import time
+
+
+@dataclass
+class LocalProblem:
+    id: str
+    domain: str
+    assets: List[str]
+    objective: Dict[str, Any]
+    constraints: Dict[str, Any]
+    solver_hint: Dict[str, Any] = field(default_factory=dict)
+
+
+@dataclass
+class SharedVariables:
+    forecasts: Dict[str, Any]  # per-venue forecasts
+    priors: Dict[str, Any]  # prior solutions or priors
+    version: int = 0
+    timestamp: float = field(default_factory=lambda: time.time())
+
+
+@dataclass
+class PlanDelta:
+    delta: Dict[str, Any]
+    timestamp: float = field(default_factory=lambda: time.time())
+    author: str = "system"
+    contract_id: str = "default"
+    signature: str | None = None
+
+
+@dataclass
+class DualVariables:
+    multipliers: Dict[str, Any]  # Lagrange multipliers or dual vars
+
+
+@dataclass
+class PrivacyBudget:
+    signal: str
+    budget: float
+    expiry: float
+
+
+@dataclass
+class AuditLog:
+    entry: str
+    signer: str
+    timestamp: float
+    contract_id: str
+    version: int
+
+
+@dataclass
+class GraphOfContractsRegistryEntry:
+    adapter_id: str
+    supported_domains: List[str]
+    contract_version: str
+
+
+@dataclass
+class GraphOfContractsRegistry:
+    entries: Dict[str, GraphOfContractsRegistryEntry] = field(default_factory=dict)
diff --git a/exoroute/delta_store.py b/exoroute/delta_store.py
new file mode 100644
index 0000000..8057a1b
--- /dev/null
+++ b/exoroute/delta_store.py
@@ -0,0 +1,45 @@
+import os
+import json
+from pathlib import Path
+from typing import List, Dict, Any
+from datetime import datetime
+
+from .core import PlanDelta
+
+
+class DeltaStore:
+    def __init__(self, path: str = ".exoroute_deltas"):
+        self.path = Path(path)
+        self.path.mkdir(parents=True, exist_ok=True)
+        self.log_file = self.path / "deltas.log"
+        if not self.log_file.exists():
+            self.log_file.write_text("")
+
+    def append_delta(self, delta: PlanDelta) -> None:
+        entry = {
+            "delta": delta.delta,
+            "timestamp": delta.timestamp,
+            "author": delta.author,
+            "contract_id": delta.contract_id,
+            "signature": delta.signature,
+        }
+        with self.log_file.open("a", encoding="utf-8") as f:
+            f.write(json.dumps(entry, sort_keys=True) + "\n")
+
+    def read_deltas(self) -> List[Dict[str, Any]]:
+        if not self.log_file.exists():
+            return []
+        deltas = []
+        with self.log_file.open("r", encoding="utf-8") as f:
+            for line in f:
+                line = line.strip()
+                if not line:
+                    continue
+                try:
+                    deltas.append(json.loads(line))
+                except json.JSONDecodeError:
+                    continue
+        return deltas
+
+    def clear(self) -> None:
+        self.log_file.write_text("")
diff --git a/exoroute/energi_bridge.py b/exoroute/energi_bridge.py
new file mode 100644
index 0000000..e1aa046
--- /dev/null
+++ b/exoroute/energi_bridge.py
@@ -0,0 +1,33 @@
+from __future__ import annotations
+from typing import Dict, Any, Optional
+from .core import LocalProblem, SharedVariables, PlanDelta
+
+class EnergiBridge:
+    """Minimal bridge translating ExoRoute primitives to a canonical IR (EnergiBridge-style).
+    This is a lightweight, extensible mapping scaffold for interoperability with CatOpt-like ecosystems.
+    """
+    @staticmethod
+    def to_canonical(local: LocalProblem, shared: SharedVariables, delta: Optional[PlanDelta] = None) -> Dict[str, Any]:
+        can = {
+            "Objects": {
+                "LocalProblem": {
+                    "id": local.id,
+                    "domain": local.domain,
+                    "assets": local.assets,
+                    "objective": local.objective,
+                    "constraints": local.constraints,
+                    "solver_hint": local.solver_hint,
+                }
+            },
+            "Morphisms": {
+                "SharedVariables": {
+                    "forecasts": getattr(shared, "forecasts", {}),
+                    "priors": getattr(shared, "priors", {}),
+                    "version": getattr(shared, "version", 0),
+                    "timestamp": getattr(shared, "timestamp", 0.0),
+                },
+                "DualVariables": {},
+            },
+            "PlanDelta": delta.delta if delta else {},
+        }
+        return can
diff --git a/exoroute/planner.py b/exoroute/planner.py
new file mode 100644
index 0000000..7dd331a
--- /dev/null
+++ b/exoroute/planner.py
@@ -0,0 +1,25 @@
+from __future__ import annotations
+from typing import Dict, Any
+from .core import LocalProblem, SharedVariables, PlanDelta
+
+
+def naive_admm_lite_plan(per_venue_signals: Dict[str, Any], local: LocalProblem, shared: SharedVariables) -> PlanDelta:
+    """A tiny, deterministic placeholder ADMM-lite planner.
+    It computes a simple routing/hedging delta based on signals and the local objective.
+    This is NOT a production-grade optimizer; it's a seed for MVP wiring.
+    """
+    # Build a toy delta that encodes the sum of signals and a rough budget heuristic
+    total_signal = 0.0
+    for v, s in per_venue_signals.items():
+        price = s.get("price", 0.0)
+        total_signal += price
+
+    delta = {
+        "type": "demo-plan",
+        "local_problem_id": local.id,
+        "objective_summary": local.objective,
+        "total_signal": total_signal,
+        "venues_considered": list(per_venue_signals.keys()),
+        "timestamp": __import__('time').time(),
+    }
+    return PlanDelta(delta=delta, author="planner", contract_id=local.id)
diff --git a/exoroute/server.py b/exoroute/server.py
new file mode 100644
index 0000000..edde5d9
--- /dev/null
+++ b/exoroute/server.py
@@ -0,0 +1,5 @@
+import uvicorn
+from .api import app
+
+def run(host: str = "0.0.0.0", port: int = 8000):
+    uvicorn.run(app, host=host, port=port)
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..9ffae08
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,23 @@
+[build-system]
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "exoroute"
+version = "0.1.0"
+description = "Cross-venue order routing orchestrator prototype with deterministic replay"
+readme = "README.md"
+requires-python = ">=3.9"
+license = {text = "MIT"}
+authors = [{name = "OpenCode"}]
+dependencies = [
+  "fastapi>=0.105.0",
+  "uvicorn[standard]>=0.22.0",
+  "pydantic>=1.10,<2",
+  "cryptography>=38.0.0",
+  "typing-extensions>=4.0",
+  "requests>=2.28.0"
+]
+
+[tool.setuptools.packages.find]
+where = ["exoroute"]
diff --git a/test.sh b/test.sh
new file mode 100644
index 0000000..f1c7f6b
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+echo "[TEST] Building package..."
+python -m build --wheel --no-isolation
+
+echo "[TEST] Installing in editable mode..."
+python -m pip install -e .
+
+echo "[TEST] Quick import sanity..."
+python - << 'PY'
+import exoroute.api as api
+print('API import OK', api.__name__)
+PY
+
+echo "[TEST] All basic tests passed."