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..50358a1
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,30 @@
+Repository Agent Guide — BlockEnergy Mesh (idea85-blockenergy-mesh-verifiable)
+=============================================================
+
+Purpose
+- This repository holds a protocol skeleton and a focused Phase-0 implementation for the BlockEnergy Mesh idea. Agents must preserve the registry, primitives, adapters, and the toy proof mechanism. Future agents will extend with solvers, ZK proofs, and ledger integrations.
+
+Tech stack
+- Python 3.8+
+- pydantic for canonical models and schema validation
+- cryptography for signature-based attestations
+- numpy for small numerical helpers
+- pytest for tests
+
+Key paths
+- src/idea85_blockenergy_mesh_verifiable/: package root
+  - primitives.py: LocalProblem, SharedVariables, PlanDelta, AuditLog
+  - registry.py: GraphOfContracts (in-memory registry)
+  - adapters.py: sample adapters and adapter base class
+  - proofs.py: toy proof generation and verification
+
+Testing
+- Run `bash test.sh`. The script executes `pytest` and `python3 -m build` to validate packaging.
+
+Git / CI notes for agents
+- Do not run git commands from the agent unless the user explicitly requests commits or pushes.
+- When extending interfaces or changing persisted schema, update registry tests and include a migration plan.
+
+Contribution rules
+- Keep changes minimal and focused. Follow the repo's dataclass/pydantic patterns.
+- Add unit tests for any new behavior. Ensure `pytest` remains green.
diff --git a/README.md b/README.md
index 99c4fb9..3799dbe 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,21 @@
-# idea85-blockenergy-mesh-verifiable
+BlockEnergy Mesh — idea85-blockenergy-mesh-verifiable
+=====================================================
 
-Source logic for Idea #85
\ No newline at end of file
+This repository contains a focused, production-oriented chunk of the BlockEnergy Mesh project: a protocol skeleton, canonical primitives, a Graph-of-Contracts registry, two sample adapters, and a toy on-chain proof mechanism (signature-based attestation of constraint satisfaction).
+
+What is included (MVP slice)
+- Canonical primitives: LocalProblem, SharedVariables, PlanDelta, AuditLog (pydantic models)
+- Graph-of-Contracts: simple registry to version contract schemas and adapters
+- Two starter adapters: SubstationMeterAdapter and DerAggregatorAdapter that map device data to LocalProblem and produce PlanDelta
+- Toy proof mechanism: cryptographic commitment (SHA-256) + ECDSA signature (via cryptography) as a verifiable attestation
+- Tests and packaging: pytest tests and pyproject.toml for packaging
+
+Run tests
+1. Create a virtualenv (recommended)
+2. Install test deps (optional): `pip install -r requirements.txt` (not required)
+3. Run the test script: `bash test.sh`
+
+This will run `pytest` and `python3 -m build` to validate packaging metadata.
+
+Roadmap
+- This patch implements Phase 0 skeleton and a toy proof scheme. Next steps by the swarm: integrate ZK proofs (snarkjs/circom or zksnark bindings), off-chain solver (ADMM-lite), delta-sync reconciliation, governance ledger integration, and adapter conformance suite.
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..f94332b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,15 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "idea85-blockenergy-mesh-verifiable"
+version = "0.1.0"
+description = "BlockEnergy Mesh: Verifiable Cross-Utility Microgrid Data Exchange (toy MVP)"
+readme = "README.md"
+requires-python = ">=3.8"
+dependencies = [
+    "cryptography>=3.4",
+    "pydantic>=1.8",
+    "numpy>=1.21",
+]
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..50fe8df
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,4 @@
+cryptography>=3.4
+pydantic>=1.8
+numpy>=1.21
+pytest
diff --git a/src/idea85_blockenergy_mesh_verifiable/__init__.py b/src/idea85_blockenergy_mesh_verifiable/__init__.py
new file mode 100644
index 0000000..25e5528
--- /dev/null
+++ b/src/idea85_blockenergy_mesh_verifiable/__init__.py
@@ -0,0 +1,7 @@
+"""idea85_blockenergy_mesh_verifiable package."""
+__all__ = [
+    "primitives",
+    "registry",
+    "adapters",
+    "proofs",
+]
diff --git a/src/idea85_blockenergy_mesh_verifiable/adapters.py b/src/idea85_blockenergy_mesh_verifiable/adapters.py
new file mode 100644
index 0000000..16cbd57
--- /dev/null
+++ b/src/idea85_blockenergy_mesh_verifiable/adapters.py
@@ -0,0 +1,79 @@
+from typing import Dict, Any
+from datetime import datetime
+from .primitives import LocalProblem, PlanDelta
+from .proofs import generate_proof, generate_ec_keypair, ToyProof
+
+
+class AdapterBase:
+    def __init__(self, name: str):
+        self.name = name
+        # each adapter owns a keypair for signing proofs in this MVP
+        self._priv = generate_ec_keypair()
+
+    def private_key(self):
+        return self._priv
+
+
+class SubstationMeterAdapter(AdapterBase):
+    """Maps a substation meter reading to a LocalProblem."""
+
+    def to_local_problem(self, meter_payload: Dict[str, Any]) -> LocalProblem:
+        # Expect payload with node_id, timestamp, loads list, capacity
+        return LocalProblem(
+            schema_version="localproblem-v1",
+            node_id=meter_payload["node_id"],
+            timestamp=datetime.fromisoformat(meter_payload["timestamp"]),
+            horizon_minutes=int(meter_payload.get("horizon_minutes", 60)),
+            net_load_kw=meter_payload["net_load_kw"],
+            capacity_kw=float(meter_payload["capacity_kw"]),
+            metadata=meter_payload.get("metadata"),
+        )
+
+    def produce_plan_and_proof(self, meter_payload: Dict[str, Any]) -> Dict[str, Any]:
+        lp = self.to_local_problem(meter_payload)
+
+        # naive deterministic plan: zero-out anything above capacity by scaling
+        avg = sum(lp.net_load_kw) / max(1, len(lp.net_load_kw))
+        scale = min(1.0, lp.capacity_kw / max(1e-6, avg))
+        plan = [v * scale for v in lp.net_load_kw]
+
+        delta = [p - v for p, v in zip(plan, lp.net_load_kw)]
+
+        pd = PlanDelta(schema_version="plandelta-v1", node_id=lp.node_id, delta_schedule_kw=delta, reason="scale_to_capacity")
+
+        # Create claims (toy): capacity respected if max(plan) <= capacity
+        claims = {"capacity_ok": max(plan) <= lp.capacity_kw}
+
+        proof = generate_proof(lp.dict(), claims, self._priv)
+
+        return {"plan_delta": pd, "proof": proof}
+
+
+class DerAggregatorAdapter(AdapterBase):
+    """Maps an aggregator's API to LocalProblem; slightly different heuristic."""
+
+    def to_local_problem(self, agg_payload: Dict[str, Any]) -> LocalProblem:
+        return LocalProblem(
+            schema_version="localproblem-v1",
+            node_id=agg_payload["id"],
+            timestamp=datetime.fromisoformat(agg_payload.get("ts")),
+            horizon_minutes=int(agg_payload.get("horizon", 60)),
+            net_load_kw=agg_payload["profile"],
+            capacity_kw=float(agg_payload.get("cap", 0.0)),
+            metadata=agg_payload.get("meta"),
+        )
+
+    def produce_plan_and_proof(self, agg_payload: Dict[str, Any]) -> Dict[str, Any]:
+        lp = self.to_local_problem(agg_payload)
+
+        # simple heuristic: shift down high peaks by fixed margin 10%
+        plan = [v * 0.9 if v > 0.8 * lp.capacity_kw else v for v in lp.net_load_kw]
+        delta = [p - v for p, v in zip(plan, lp.net_load_kw)]
+
+        pd = PlanDelta(schema_version="plandelta-v1", node_id=lp.node_id, delta_schedule_kw=delta, reason="peak_shave_10pct")
+
+        claims = {"capacity_ok": max(plan) <= lp.capacity_kw}
+
+        proof = generate_proof(lp.dict(), claims, self._priv)
+
+        return {"plan_delta": pd, "proof": proof}
diff --git a/src/idea85_blockenergy_mesh_verifiable/primitives.py b/src/idea85_blockenergy_mesh_verifiable/primitives.py
new file mode 100644
index 0000000..560719b
--- /dev/null
+++ b/src/idea85_blockenergy_mesh_verifiable/primitives.py
@@ -0,0 +1,41 @@
+from typing import List, Dict, Optional
+from pydantic import BaseModel, Field
+from datetime import datetime
+
+
+class VersionedModel(BaseModel):
+    schema_version: str = Field(..., description="Schema version identifier")
+
+
+class LocalProblem(VersionedModel):
+    """Canonical representation of a local optimization problem for a DER domain."""
+    node_id: str
+    timestamp: datetime
+    horizon_minutes: int
+    net_load_kw: List[float]
+    capacity_kw: float
+    metadata: Optional[Dict] = None
+
+
+class SharedVariables(VersionedModel):
+    """Variables shared across domains (morphisms) for coordinated optimization."""
+    node_id: str
+    schedule_kw: List[float]
+    price_signal: Optional[List[float]] = None
+
+
+class PlanDelta(VersionedModel):
+    """Incremental plan updates produced by a local solver or adapter."""
+    node_id: str
+    delta_schedule_kw: List[float]
+    reason: Optional[str] = None
+
+
+class AuditLog(VersionedModel):
+    """Audit entry tying objects and proofs together for long-term verifiability."""
+    entry_id: str
+    created_at: datetime
+    author: str
+    object_hash: str
+    proof_ref: Optional[str] = None
+    metadata: Optional[Dict] = None
diff --git a/src/idea85_blockenergy_mesh_verifiable/proofs.py b/src/idea85_blockenergy_mesh_verifiable/proofs.py
new file mode 100644
index 0000000..c895c2a
--- /dev/null
+++ b/src/idea85_blockenergy_mesh_verifiable/proofs.py
@@ -0,0 +1,79 @@
+import json
+from hashlib import sha256
+from cryptography.hazmat.primitives import hashes, serialization
+from cryptography.hazmat.primitives.asymmetric import ec
+from cryptography.hazmat.primitives.asymmetric.utils import encode_dss_signature, decode_dss_signature
+from cryptography.hazmat.primitives import serialization
+from cryptography.exceptions import InvalidSignature
+
+
+def _canonical_json(obj) -> bytes:
+    # Use json.dumps with a default serializer for datetimes and other non-serializable
+    # types. Keep keys sorted for deterministic commitments.
+    return json.dumps(
+        obj,
+        sort_keys=True,
+        separators=(",", ":"),
+        default=lambda o: o.isoformat() if hasattr(o, "isoformat") else str(o),
+    ).encode("utf-8")
+
+
+class ToyProof:
+    """Toy proof: commitment (sha256 of object) + ECDSA signature by prover key.
+
+    The proof object carries a minimal claim set (e.g., capacity_ok) and a signature
+    over (commitment || claims) so verifiers can check the attestation without raw data.
+    """
+
+    def __init__(self, commitment_hex: str, claims: dict, signature: bytes, pubkey_bytes: bytes):
+        self.commitment = commitment_hex
+        self.claims = claims
+        self.signature = signature
+        self.pubkey = pubkey_bytes
+
+    def to_dict(self):
+        return {
+            "commitment": self.commitment,
+            "claims": self.claims,
+            "signature": self.signature.hex(),
+            "pubkey": self.pubkey.hex(),
+        }
+
+
+def generate_proof(obj: dict, claims: dict, private_key: ec.EllipticCurvePrivateKey) -> ToyProof:
+    # Commitment: hash of canonical JSON of the object
+    commitment = sha256(_canonical_json(obj)).hexdigest()
+
+    payload = {"commitment": commitment, "claims": claims}
+    payload_b = _canonical_json(payload)
+
+    signature = private_key.sign(payload_b, ec.ECDSA(hashes.SHA256()))
+
+    pubkey = private_key.public_key().public_bytes(
+        encoding=serialization.Encoding.DER,
+        format=serialization.PublicFormat.SubjectPublicKeyInfo,
+    )
+
+    return ToyProof(commitment, claims, signature, pubkey)
+
+
+def verify_proof(obj: dict, proof: ToyProof) -> bool:
+    # Recompute commitment
+    commitment = sha256(_canonical_json(obj)).hexdigest()
+    if commitment != proof.commitment:
+        return False
+
+    payload = {"commitment": proof.commitment, "claims": proof.claims}
+    payload_b = _canonical_json(payload)
+
+    # load pubkey
+    pubkey = serialization.load_der_public_key(proof.pubkey)
+    try:
+        pubkey.verify(proof.signature, payload_b, ec.ECDSA(hashes.SHA256()))
+        return True
+    except InvalidSignature:
+        return False
+
+
+def generate_ec_keypair() -> ec.EllipticCurvePrivateKey:
+    return ec.generate_private_key(ec.SECP256R1())
diff --git a/src/idea85_blockenergy_mesh_verifiable/registry.py b/src/idea85_blockenergy_mesh_verifiable/registry.py
new file mode 100644
index 0000000..2f90711
--- /dev/null
+++ b/src/idea85_blockenergy_mesh_verifiable/registry.py
@@ -0,0 +1,30 @@
+from typing import Dict, Any, List
+from copy import deepcopy
+
+class GraphOfContracts:
+    """Simple in-memory registry mapping contract names to versioned schemas and adapters.
+
+    This is intentionally lightweight: it stores schema metadata and adapter references.
+    """
+
+    def __init__(self):
+        # structure: { contract_name: { version: {"schema": ..., "adapters": [names] } } }
+        self._store = {}
+
+    def register_schema(self, contract_name: str, version: str, schema: Any):
+        self._store.setdefault(contract_name, {})
+        self._store[contract_name][version] = {"schema": deepcopy(schema), "adapters": []}
+
+    def list_versions(self, contract_name: str) -> List[str]:
+        return list(self._store.get(contract_name, {}).keys())
+
+    def add_adapter(self, contract_name: str, version: str, adapter_name: str):
+        if contract_name not in self._store or version not in self._store[contract_name]:
+            raise KeyError("Schema version not found")
+        self._store[contract_name][version]["adapters"].append(adapter_name)
+
+    def get_schema(self, contract_name: str, version: str):
+        return self._store[contract_name][version]["schema"]
+
+    def adapters_for(self, contract_name: str, version: str):
+        return list(self._store[contract_name][version]["adapters"])
diff --git a/test.sh b/test.sh
new file mode 100644
index 0000000..12cf4e3
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+
+echo "Installing package in editable mode..."
+pip install -e .
+
+echo "Running pytest..."
+pytest -q
+
+echo "Building package (python3 -m build)..."
+python3 -m build
+
+echo "All tests and build completed successfully."
diff --git a/tests/test_primitives.py b/tests/test_primitives.py
new file mode 100644
index 0000000..4440765
--- /dev/null
+++ b/tests/test_primitives.py
@@ -0,0 +1,46 @@
+import pytest
+from idea85_blockenergy_mesh_verifiable.primitives import LocalProblem
+from idea85_blockenergy_mesh_verifiable.adapters import SubstationMeterAdapter, DerAggregatorAdapter
+from idea85_blockenergy_mesh_verifiable.proofs import verify_proof
+from datetime import datetime
+
+
+def sample_meter_payload():
+    return {
+        "node_id": "substation-1",
+        "timestamp": datetime.utcnow().isoformat(),
+        "horizon_minutes": 60,
+        "net_load_kw": [10.0, 12.0, 11.0, 9.0],
+        "capacity_kw": 12.0,
+    }
+
+
+def test_substation_adapter_plan_and_proof():
+    adapter = SubstationMeterAdapter("submeter")
+    payload = sample_meter_payload()
+    out = adapter.produce_plan_and_proof(payload)
+
+    assert "plan_delta" in out and "proof" in out
+    plan_delta = out["plan_delta"]
+    proof = out["proof"]
+
+    # Plan delta is a PlanDelta model
+    assert plan_delta.node_id == payload["node_id"]
+    # Proof verifies against original LocalProblem
+    lp = adapter.to_local_problem(payload)
+    assert verify_proof(lp.dict(), proof)
+
+
+def test_der_adapter_plan_and_proof():
+    adapter = DerAggregatorAdapter("deragg")
+    payload = {
+        "id": "der-1",
+        "ts": datetime.utcnow().isoformat(),
+        "horizon": 60,
+        "profile": [2.0, 3.0, 5.0, 1.0],
+        "cap": 6.0,
+    }
+    out = adapter.produce_plan_and_proof(payload)
+    assert "plan_delta" in out and "proof" in out
+    lp = adapter.to_local_problem(payload)
+    assert verify_proof(lp.dict(), out["proof"]) is True