diff --git a/.env.example b/.env.example
index df149c6..864e71d 100644
--- a/.env.example
+++ b/.env.example
@@ -2,11 +2,9 @@ DEPLOYER_PRIVATE_KEY=0x...
 BASE_SEPOLIA_RPC_URL=https://sepolia.base.org
 BASE_MAINNET_RPC_URL=https://mainnet.base.org
 
-TREASURY_WALLET=0x0000000000000000000000000000000000000000
-
-# Base Sepolia USDC by default (override per network as needed).
-MINT_CURRENCY_ADDRESS=0x036cbd53842c5426634e7929541ec2318f3dcf7e
-MINT_AMOUNT_ATOMIC=100000000
+# EDUT ID mint is gas-only: no treasury transfer and no token payment.
+MINT_CURRENCY_ADDRESS=0x0000000000000000000000000000000000000000
+MINT_AMOUNT_ATOMIC=0
 
 # Optional: write deployment metadata JSON (address, tx hash, params).
 # DEPLOY_OUTPUT_PATH=./deploy/membership-deploy.sepolia.json
@@ -19,3 +17,18 @@ OFFER_PRICE_ATOMIC=1000000000
 
 # Optional: write entitlement deployment metadata JSON.
 # ENTITLEMENT_DEPLOY_OUTPUT_PATH=./deploy/entitlement-deploy.sepolia.json
+
+# Last Light deployment (comma-separated guardian addresses + threshold).
+LASTLIGHT_GUARDIANS=0x0000000000000000000000000000000000000000
+LASTLIGHT_THRESHOLD=3
+# LASTLIGHT_DEPLOY_OUTPUT_PATH=./deploy/lastlight-deploy.sepolia.json
+
+# Last Light EIP-712 flow (arm/cancel/execute).
+LASTLIGHT_ACTION=arm
+LASTLIGHT_CONTRACT_ADDRESS=0x0000000000000000000000000000000000000000
+LASTLIGHT_RELEASE_ID=last-light-release
+# LASTLIGHT_GUARDIAN_PRIVATE_KEYS=0x...,0x...,0x...
+LASTLIGHT_DEADLINE_SECONDS=3600
+# LASTLIGHT_REASON_HASH=owner-incapacity
+# LASTLIGHT_DECRYPTION_KEY=decryption-key
+# LASTLIGHT_MANIFEST_REF_HASH=manifest-ref
diff --git a/contracts/EdutHumanMembership.sol b/contracts/EdutHumanMembership.sol
index bc70872..f31e67b 100644
--- a/contracts/EdutHumanMembership.sol
+++ b/contracts/EdutHumanMembership.sol
@@ -1,15 +1,11 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.24;
 
-interface IERC20 {
-    function transferFrom(address from, address to, uint256 value) external returns (bool);
-}
-
-/// @title EDUT Human Membership (Soulbound)
-/// @notice One-time human governance token with configurable mint price and sponsor mint support.
+/// @title EDUT ID (Soulbound)
+/// @notice One-time human governance identity token. Gas-only mint; no platform fee path.
 contract EdutHumanMembership {
-    string public constant name = "EDUT Human Membership";
-    string public constant symbol = "EDUTHUM";
+    string public constant name = "EDUT ID";
+    string public constant symbol = "EID";
 
     uint8 public constant MEMBERSHIP_NONE = 0;
     uint8 public constant MEMBERSHIP_ACTIVE = 1;
@@ -22,22 +18,15 @@ contract EdutHumanMembership {
     error UnknownToken();
     error InvalidStatus();
     error SoulboundNonTransferable();
-    error IncorrectEthValue();
     error UnexpectedEthValue();
-    error PaymentTransferFailed();
 
     event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
     event MembershipMinted(address indexed wallet, uint256 indexed tokenId, uint256 amountPaid, address currency);
-    event MintPriceUpdated(address indexed currency, uint256 amountAtomic);
+    event EdutIDMinted(address indexed wallet, uint256 indexed tokenId);
     event MembershipStatusUpdated(address indexed wallet, uint8 status);
-    event TreasuryUpdated(address indexed treasury);
     event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
 
     address public owner;
-    address public treasury;
-
-    address private _mintCurrency;
-    uint256 private _mintAmountAtomic;
     uint256 private _nextTokenId = 1;
 
     mapping(uint256 => address) private _tokenOwner;
@@ -50,15 +39,9 @@ contract EdutHumanMembership {
         _;
     }
 
-    constructor(address treasury_, address currency_, uint256 amountAtomic_) {
-        if (treasury_ == address(0)) revert InvalidAddress();
+    constructor() {
         owner = msg.sender;
-        treasury = treasury_;
-        _mintCurrency = currency_;
-        _mintAmountAtomic = amountAtomic_;
         emit OwnershipTransferred(address(0), msg.sender);
-        emit TreasuryUpdated(treasury_);
-        emit MintPriceUpdated(currency_, amountAtomic_);
     }
 
     function balanceOf(address wallet) external view returns (uint256) {
@@ -84,16 +67,15 @@ contract EdutHumanMembership {
         return _membershipStatus[wallet];
     }
 
-    function currentMintPrice() external view returns (address currency, uint256 amountAtomic) {
-        return (_mintCurrency, _mintAmountAtomic);
+    function currentMintPrice() external pure returns (address currency, uint256 amountAtomic) {
+        return (address(0), 0);
     }
 
-    /// @notice Mint one human membership token to recipient. Caller may sponsor payment.
+    /// @notice Mint one EDUT ID token to recipient. Caller may sponsor gas only.
     function mintMembership(address recipient) external payable returns (uint256 tokenId) {
         if (recipient == address(0)) revert InvalidAddress();
         if (_walletToken[recipient] != 0) revert AlreadyMinted();
-
-        _collectMintPayment(msg.sender);
+        if (msg.value != 0) revert UnexpectedEthValue();
 
         tokenId = _nextTokenId;
         _nextTokenId += 1;
@@ -104,22 +86,11 @@ contract EdutHumanMembership {
         _membershipStatus[recipient] = MEMBERSHIP_ACTIVE;
 
         emit Transfer(address(0), recipient, tokenId);
-        emit MembershipMinted(recipient, tokenId, _mintAmountAtomic, _mintCurrency);
+        emit MembershipMinted(recipient, tokenId, 0, address(0));
+        emit EdutIDMinted(recipient, tokenId);
         emit MembershipStatusUpdated(recipient, MEMBERSHIP_ACTIVE);
     }
 
-    function updateMintPrice(address currency, uint256 amountAtomic) external onlyOwner {
-        _mintCurrency = currency;
-        _mintAmountAtomic = amountAtomic;
-        emit MintPriceUpdated(currency, amountAtomic);
-    }
-
-    function setTreasury(address nextTreasury) external onlyOwner {
-        if (nextTreasury == address(0)) revert InvalidAddress();
-        treasury = nextTreasury;
-        emit TreasuryUpdated(nextTreasury);
-    }
-
     function setMembershipStatus(address wallet, uint8 status) external onlyOwner {
         uint256 tokenId = _walletToken[wallet];
         if (tokenId == 0) revert UnknownToken();
@@ -163,23 +134,4 @@ contract EdutHumanMembership {
     function safeTransferFrom(address, address, uint256, bytes calldata) external pure {
         revert SoulboundNonTransferable();
     }
-
-    function _collectMintPayment(address payer) private {
-        uint256 amount = _mintAmountAtomic;
-        if (amount == 0) {
-            if (msg.value != 0) revert UnexpectedEthValue();
-            return;
-        }
-
-        if (_mintCurrency == address(0)) {
-            if (msg.value != amount) revert IncorrectEthValue();
-            (bool ok, ) = treasury.call{value: amount}("");
-            if (!ok) revert PaymentTransferFailed();
-            return;
-        }
-
-        if (msg.value != 0) revert UnexpectedEthValue();
-        bool transferred = IERC20(_mintCurrency).transferFrom(payer, treasury, amount);
-        if (!transferred) revert PaymentTransferFailed();
-    }
 }
diff --git a/contracts/LastLightController.sol b/contracts/LastLightController.sol
new file mode 100644
index 0000000..0dd54cb
--- /dev/null
+++ b/contracts/LastLightController.sol
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.24;
+
+/// @title EDUT Project Last Light Controller
+/// @notice Guardian-threshold continuity release controller with EIP-712 quorum signatures.
+contract LastLightController {
+    error NotOwner();
+    error InvalidAddress();
+    error InvalidThreshold();
+    error InvalidGuardianSet();
+    error InvalidReleaseId();
+    error InvalidReleaseStatus();
+    error GuardianSetChanged();
+    error GuardianNotFound();
+    error DuplicateGuardian();
+    error SignatureExpired();
+    error InvalidGuardianQuorum();
+    error InvalidSignature();
+    error TimelockRequired();
+    error ExecutionTimelockActive();
+    error InvalidDecryptionKey();
+
+    enum ReleaseStatus {
+        None,
+        Staged,
+        Armed,
+        Executed,
+        Canceled
+    }
+
+    struct ReleaseRecord {
+        bytes32 payloadManifestHash;
+        bytes32 encryptedPayloadRootHash;
+        bytes32 decryptionKeyHash;
+        bytes32 guardianSetHash;
+        bytes32 metadataRefHash;
+        uint64 timelockSeconds;
+        uint64 stagedAt;
+        uint64 armedAt;
+        uint64 executeNotBefore;
+        uint64 armEpoch;
+        uint8 threshold;
+        ReleaseStatus status;
+    }
+
+    bytes32 private constant DOMAIN_TYPEHASH =
+        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
+    bytes32 private constant ARM_TYPEHASH =
+        keccak256("ArmIntent(bytes32 releaseId,bytes32 reasonHash,uint64 deadline,uint64 armEpoch)");
+    bytes32 private constant CANCEL_TYPEHASH =
+        keccak256("CancelIntent(bytes32 releaseId,bytes32 reasonHash,uint64 deadline,uint64 armEpoch)");
+    bytes32 private constant EXECUTE_TYPEHASH =
+        keccak256("ExecuteIntent(bytes32 releaseId,bytes32 decryptionKey,bytes32 manifestRefHash,uint64 deadline,uint64 armEpoch)");
+    bytes32 private constant NAME_HASH = keccak256("EDUT Last Light");
+    bytes32 private constant VERSION_HASH = keccak256("1");
+    uint256 private constant SECP256K1_HALF_N =
+        0x7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0;
+
+    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+    event GuardianSetUpdated(bytes32 indexed guardianSetHash, uint8 threshold, uint256 guardianCount);
+    event LastLightReleaseStaged(
+        bytes32 indexed releaseId,
+        bytes32 payloadManifestHash,
+        bytes32 encryptedPayloadRootHash,
+        bytes32 decryptionKeyHash,
+        bytes32 guardianSetHash,
+        uint8 threshold,
+        uint64 timelockSeconds
+    );
+    event LastLightReleaseArmed(bytes32 indexed releaseId, bytes32 reasonHash, uint64 executeNotBefore, uint64 armEpoch);
+    event LastLightReleaseCanceled(bytes32 indexed releaseId, bytes32 reasonHash, uint64 armEpoch);
+    event LastLightReleaseExecuted(bytes32 indexed releaseId, bytes32 decryptionKey, bytes32 manifestRefHash, uint64 armEpoch);
+
+    address public owner;
+    address[] private _guardians;
+    mapping(address => bool) private _isGuardian;
+    bytes32 public guardianSetHash;
+    uint8 public threshold;
+
+    mapping(bytes32 => ReleaseRecord) private _releases;
+
+    modifier onlyOwner() {
+        if (msg.sender != owner) revert NotOwner();
+        _;
+    }
+
+    constructor(address[] memory guardians_, uint8 threshold_) {
+        owner = msg.sender;
+        emit OwnershipTransferred(address(0), msg.sender);
+        _setGuardians(guardians_, threshold_);
+    }
+
+    function transferOwnership(address nextOwner) external onlyOwner {
+        if (nextOwner == address(0)) revert InvalidAddress();
+        address previous = owner;
+        owner = nextOwner;
+        emit OwnershipTransferred(previous, nextOwner);
+    }
+
+    function setGuardians(address[] calldata guardians_, uint8 threshold_) external onlyOwner {
+        _setGuardians(guardians_, threshold_);
+    }
+
+    function guardians() external view returns (address[] memory) {
+        return _guardians;
+    }
+
+    function isGuardian(address account) external view returns (bool) {
+        return _isGuardian[account];
+    }
+
+    function releaseRecord(bytes32 releaseId) external view returns (ReleaseRecord memory) {
+        return _releases[releaseId];
+    }
+
+    function stageRelease(
+        bytes32 releaseId,
+        bytes32 payloadManifestHash,
+        bytes32 encryptedPayloadRootHash,
+        bytes32 decryptionKeyHash,
+        bytes32 metadataRefHash,
+        uint64 timelockSeconds
+    ) external onlyOwner {
+        if (releaseId == bytes32(0)) revert InvalidReleaseId();
+        if (payloadManifestHash == bytes32(0) || encryptedPayloadRootHash == bytes32(0) || decryptionKeyHash == bytes32(0)) {
+            revert InvalidReleaseId();
+        }
+        if (timelockSeconds == 0) revert TimelockRequired();
+
+        ReleaseRecord storage rec = _releases[releaseId];
+        if (rec.status == ReleaseStatus.Staged || rec.status == ReleaseStatus.Armed) revert InvalidReleaseStatus();
+
+        uint64 nowTs = uint64(block.timestamp);
+        rec.payloadManifestHash = payloadManifestHash;
+        rec.encryptedPayloadRootHash = encryptedPayloadRootHash;
+        rec.decryptionKeyHash = decryptionKeyHash;
+        rec.guardianSetHash = guardianSetHash;
+        rec.metadataRefHash = metadataRefHash;
+        rec.timelockSeconds = timelockSeconds;
+        rec.stagedAt = nowTs;
+        rec.armedAt = 0;
+        rec.executeNotBefore = 0;
+        rec.armEpoch += 1;
+        rec.threshold = threshold;
+        rec.status = ReleaseStatus.Staged;
+
+        emit LastLightReleaseStaged(
+            releaseId,
+            payloadManifestHash,
+            encryptedPayloadRootHash,
+            decryptionKeyHash,
+            guardianSetHash,
+            threshold,
+            timelockSeconds
+        );
+    }
+
+    function armReleaseWithSignatures(
+        bytes32 releaseId,
+        bytes32 reasonHash,
+        uint64 deadline,
+        bytes[] calldata signatures
+    ) external {
+        ReleaseRecord storage rec = _requireStagedRelease(releaseId);
+        _requireCurrentGuardianSet(rec);
+        if (deadline < block.timestamp) revert SignatureExpired();
+
+        bytes32 structHash = keccak256(
+            abi.encode(
+                ARM_TYPEHASH,
+                releaseId,
+                reasonHash,
+                deadline,
+                rec.armEpoch
+            )
+        );
+        _enforceGuardianQuorum(structHash, signatures, rec.threshold);
+
+        rec.status = ReleaseStatus.Armed;
+        rec.armedAt = uint64(block.timestamp);
+        rec.executeNotBefore = rec.armedAt + rec.timelockSeconds;
+
+        emit LastLightReleaseArmed(releaseId, reasonHash, rec.executeNotBefore, rec.armEpoch);
+    }
+
+    function cancelReleaseWithSignatures(
+        bytes32 releaseId,
+        bytes32 reasonHash,
+        uint64 deadline,
+        bytes[] calldata signatures
+    ) external {
+        ReleaseRecord storage rec = _releases[releaseId];
+        if (rec.status != ReleaseStatus.Staged && rec.status != ReleaseStatus.Armed) revert InvalidReleaseStatus();
+        _requireCurrentGuardianSet(rec);
+        if (deadline < block.timestamp) revert SignatureExpired();
+
+        bytes32 structHash = keccak256(
+            abi.encode(
+                CANCEL_TYPEHASH,
+                releaseId,
+                reasonHash,
+                deadline,
+                rec.armEpoch
+            )
+        );
+        _enforceGuardianQuorum(structHash, signatures, rec.threshold);
+
+        rec.status = ReleaseStatus.Canceled;
+        rec.armedAt = 0;
+        rec.executeNotBefore = 0;
+
+        emit LastLightReleaseCanceled(releaseId, reasonHash, rec.armEpoch);
+    }
+
+    function executeReleaseWithSignatures(
+        bytes32 releaseId,
+        bytes32 decryptionKey,
+        bytes32 manifestRefHash,
+        uint64 deadline,
+        bytes[] calldata signatures
+    ) external {
+        ReleaseRecord storage rec = _releases[releaseId];
+        if (rec.status != ReleaseStatus.Armed) revert InvalidReleaseStatus();
+        _requireCurrentGuardianSet(rec);
+        if (deadline < block.timestamp) revert SignatureExpired();
+        if (block.timestamp < rec.executeNotBefore) revert ExecutionTimelockActive();
+        if (keccak256(abi.encodePacked(decryptionKey)) != rec.decryptionKeyHash) revert InvalidDecryptionKey();
+
+        bytes32 structHash = keccak256(
+            abi.encode(
+                EXECUTE_TYPEHASH,
+                releaseId,
+                decryptionKey,
+                manifestRefHash,
+                deadline,
+                rec.armEpoch
+            )
+        );
+        _enforceGuardianQuorum(structHash, signatures, rec.threshold);
+
+        rec.status = ReleaseStatus.Executed;
+
+        emit LastLightReleaseExecuted(releaseId, decryptionKey, manifestRefHash, rec.armEpoch);
+    }
+
+    function _setGuardians(address[] memory guardians_, uint8 threshold_) private {
+        uint256 count = guardians_.length;
+        if (count == 0) revert InvalidGuardianSet();
+        if (threshold_ == 0 || threshold_ > count) revert InvalidThreshold();
+
+        for (uint256 i = 0; i < _guardians.length; i++) {
+            _isGuardian[_guardians[i]] = false;
+        }
+        delete _guardians;
+
+        bytes32 rolling;
+        for (uint256 i = 0; i < count; i++) {
+            address guardian = guardians_[i];
+            if (guardian == address(0)) revert InvalidAddress();
+            if (_isGuardian[guardian]) revert DuplicateGuardian();
+            _isGuardian[guardian] = true;
+            _guardians.push(guardian);
+            rolling = keccak256(abi.encodePacked(rolling, guardian));
+        }
+
+        guardianSetHash = rolling;
+        threshold = threshold_;
+        emit GuardianSetUpdated(guardianSetHash, threshold_, count);
+    }
+
+    function _requireStagedRelease(bytes32 releaseId) private view returns (ReleaseRecord storage rec) {
+        rec = _releases[releaseId];
+        if (rec.status != ReleaseStatus.Staged) revert InvalidReleaseStatus();
+    }
+
+    function _requireCurrentGuardianSet(ReleaseRecord storage rec) private view {
+        if (rec.guardianSetHash != guardianSetHash || rec.threshold != threshold) revert GuardianSetChanged();
+    }
+
+    function _enforceGuardianQuorum(bytes32 structHash, bytes[] calldata signatures, uint8 threshold_) private view {
+        bytes32 digest = _hashTypedDataV4(structHash);
+        uint256 unique = 0;
+        address[] memory seen = new address[](signatures.length);
+
+        for (uint256 i = 0; i < signatures.length; i++) {
+            address signer = _recover(digest, signatures[i]);
+            if (!_isGuardian[signer]) revert GuardianNotFound();
+            bool duplicate;
+            for (uint256 j = 0; j < unique; j++) {
+                if (seen[j] == signer) {
+                    duplicate = true;
+                    break;
+                }
+            }
+            if (duplicate) continue;
+            seen[unique] = signer;
+            unique += 1;
+        }
+
+        if (unique < threshold_) revert InvalidGuardianQuorum();
+    }
+
+    function _hashTypedDataV4(bytes32 structHash) private view returns (bytes32) {
+        return keccak256(abi.encodePacked("\x19\x01", _domainSeparatorV4(), structHash));
+    }
+
+    function _domainSeparatorV4() private view returns (bytes32) {
+        return keccak256(
+            abi.encode(
+                DOMAIN_TYPEHASH,
+                NAME_HASH,
+                VERSION_HASH,
+                block.chainid,
+                address(this)
+            )
+        );
+    }
+
+    function _recover(bytes32 digest, bytes calldata signature) private pure returns (address signer) {
+        if (signature.length != 65) revert InvalidSignature();
+
+        bytes32 r;
+        bytes32 s;
+        uint8 v;
+        assembly {
+            r := calldataload(signature.offset)
+            s := calldataload(add(signature.offset, 32))
+            v := byte(0, calldataload(add(signature.offset, 64)))
+        }
+
+        if (uint256(s) > SECP256K1_HALF_N) revert InvalidSignature();
+        if (v != 27 && v != 28) revert InvalidSignature();
+        signer = ecrecover(digest, v, r, s);
+        if (signer == address(0)) revert InvalidSignature();
+    }
+}
diff --git a/deploy/lastlight-deploy.template.json b/deploy/lastlight-deploy.template.json
new file mode 100644
index 0000000..df60db7
--- /dev/null
+++ b/deploy/lastlight-deploy.template.json
@@ -0,0 +1,16 @@
+{
+  "network": "baseSepolia",
+  "chain_id": 84532,
+  "deployer": "0x0000000000000000000000000000000000000000",
+  "lastlight_contract": "0x0000000000000000000000000000000000000000",
+  "guardians": [
+    "0x0000000000000000000000000000000000000000",
+    "0x0000000000000000000000000000000000000001",
+    "0x0000000000000000000000000000000000000002"
+  ],
+  "guardian_count": 5,
+  "threshold": 3,
+  "deployment_tx_hash": "0x",
+  "deployed_at": "2026-02-20T00:00:00Z",
+  "notes": "Fill from deployment output and keep under change control."
+}
diff --git a/deploy/membership-deploy.template.json b/deploy/membership-deploy.template.json
index cb4e72f..23ab66c 100644
--- a/deploy/membership-deploy.template.json
+++ b/deploy/membership-deploy.template.json
@@ -2,11 +2,10 @@
   "network": "base-sepolia",
   "chain_id": 84532,
   "deployer": "0x0000000000000000000000000000000000000000",
-  "treasury_wallet": "0x0000000000000000000000000000000000000000",
-  "mint_currency_address": "0x036cbd53842c5426634e7929541ec2318f3dcf7e",
-  "mint_amount_atomic": "100000000",
+  "mint_currency_address": "0x0000000000000000000000000000000000000000",
+  "mint_amount_atomic": "0",
   "membership_contract": "0x0000000000000000000000000000000000000000",
   "deployment_tx_hash": "0x",
   "deployed_at": "2026-02-18T00:00:00Z",
-  "notes": "Fill from deployment output and keep under change control."
+  "notes": "Gas-only EDUT ID mint (no platform fee). Fill from deployment output and keep under change control."
 }
diff --git a/docs/conformance-vectors.md b/docs/conformance-vectors.md
index 268e5f2..47e500f 100644
--- a/docs/conformance-vectors.md
+++ b/docs/conformance-vectors.md
@@ -6,5 +6,5 @@
 4. `C-004` Entitlement mint emits deterministic entitlement id/event payload.
 5. `C-005` Entitlement state transitions cannot bypass allowed state machine.
 6. `C-006` Contract deployment artifacts map to verified on-chain bytecode.
-7. `C-007` Sponsor/company payer can mint membership for recipient without transferring soulbound ownership.
+7. `C-007` Sponsor/company payer can mint membership for recipient without transferring soulbound ownership and without token settlement.
 8. `C-008` USDC settlement path transfers exact atomic amount to treasury and rejects missing allowance.
diff --git a/docs/contract-roadmap.md b/docs/contract-roadmap.md
index 010e2bf..68884c6 100644
--- a/docs/contract-roadmap.md
+++ b/docs/contract-roadmap.md
@@ -2,12 +2,14 @@
 
 ## Scope
 
-1. Membership contract (soulbound).
+1. EDUT ID contract (soulbound, gas-only mint).
 2. Offer + entitlement settlement contract.
+3. Last Light continuity release controller.
 
 ## Requirements
 
-1. One ownership wallet can hold membership + multiple entitlements.
-2. Membership contract supports deterministic pricing policy inputs.
+1. One ownership wallet can hold EDUT ID + multiple entitlements.
+2. EDUT ID mint path remains non-custodial and gas-only (no platform fee transfer).
 3. Entitlement minting records recipient ownership wallet and payer wallet.
 4. Contract events are sufficient for backend reconciliation.
+5. Continuity release requires threshold guardian signatures (EIP-712) and timelocked execute path.
diff --git a/docs/interfaces.md b/docs/interfaces.md
index 6f208ba..c686240 100644
--- a/docs/interfaces.md
+++ b/docs/interfaces.md
@@ -2,17 +2,24 @@
 
 ## Core Contracts
 
-1. Membership contract (soulbound utility access).
+1. EDUT ID contract (soulbound identity access).
 2. Offer + entitlement settlement contract (`EdutOfferEntitlement`).
+3. Continuity release controller (`LastLightController`).
 
 ## Required Events
 
 1. `MembershipMinted`
-2. `MembershipStatusUpdated`
-3. `OfferUpserted`
-4. `EntitlementMinted`
-5. `EntitlementStateChanged`
+2. `EdutIDMinted`
+3. `MembershipStatusUpdated`
+4. `OfferUpserted`
+5. `EntitlementMinted`
+6. `EntitlementStateChanged`
+7. `LastLightReleaseStaged`
+8. `LastLightReleaseArmed`
+9. `LastLightReleaseCanceled`
+10. `LastLightReleaseExecuted`
 
 ## Backend Dependency
 
-Backend must reconcile on-chain events into deterministic membership/entitlement status for runtime gates.
+Backend must reconcile on-chain events into deterministic EDUT ID + entitlement status for runtime gates.
+Continuity watchers consume `LastLightReleaseExecuted` events for propagation triggers.
diff --git a/package.json b/package.json
index c85fbf1..a7e8e08 100644
--- a/package.json
+++ b/package.json
@@ -10,12 +10,13 @@
     "check:addresses": "node scripts/validate-runtime-addresses.cjs",
     "deploy:sepolia": "hardhat run scripts/deploy-membership.cjs --network baseSepolia",
     "deploy:mainnet": "hardhat run scripts/deploy-membership.cjs --network base",
-    "update:membership:price:sepolia": "hardhat run scripts/update-membership-price.cjs --network baseSepolia",
-    "update:membership:price:mainnet": "hardhat run scripts/update-membership-price.cjs --network base",
     "deploy:entitlement:sepolia": "hardhat run scripts/deploy-entitlement.cjs --network baseSepolia",
     "deploy:entitlement:mainnet": "hardhat run scripts/deploy-entitlement.cjs --network base",
+    "deploy:lastlight:sepolia": "hardhat run scripts/deploy-lastlight.cjs --network baseSepolia",
+    "deploy:lastlight:mainnet": "hardhat run scripts/deploy-lastlight.cjs --network base",
     "smoke:e2e:sepolia": "node scripts/e2e-membership-flow.cjs",
     "smoke:e2e:controlplane:sepolia": "node scripts/e2e-control-plane-flow.cjs",
+    "lastlight:eip712:sepolia": "node scripts/lastlight-eip712-flow.cjs",
     "verify:offers:sepolia": "node scripts/verify-offer-config-readback.cjs",
     "smoke:funding:sepolia": "node scripts/report-smoke-funding-threshold.cjs"
   },
diff --git a/scripts/deploy-lastlight.cjs b/scripts/deploy-lastlight.cjs
new file mode 100644
index 0000000..3d54fdb
--- /dev/null
+++ b/scripts/deploy-lastlight.cjs
@@ -0,0 +1,97 @@
+const hre = require("hardhat");
+const fs = require("fs");
+const path = require("path");
+
+function requiredEnv(name) {
+  const value = process.env[name];
+  if (!value || !value.trim()) {
+    throw new Error(`Missing required env: ${name}`);
+  }
+  return value.trim();
+}
+
+function requireAddress(name, value) {
+  if (!hre.ethers.utils.isAddress(value)) {
+    throw new Error(`Invalid address for ${name}: ${value}`);
+  }
+  if (value === hre.ethers.constants.AddressZero) {
+    throw new Error(`${name} cannot be zero address`);
+  }
+  return value;
+}
+
+function parseUint(name, value, { min = 0, max = Number.MAX_SAFE_INTEGER } = {}) {
+  const parsed = Number.parseInt(String(value).trim(), 10);
+  if (!Number.isFinite(parsed) || parsed < min || parsed > max) {
+    throw new Error(`Invalid integer for ${name}: ${value}`);
+  }
+  return parsed;
+}
+
+function parseGuardianAddresses(raw) {
+  const values = raw
+    .split(",")
+    .map((v) => v.trim())
+    .filter(Boolean);
+  if (values.length === 0) {
+    throw new Error("LASTLIGHT_GUARDIANS must include at least one address");
+  }
+
+  const dedupe = new Set();
+  const out = [];
+  for (const value of values) {
+    const checksum = requireAddress("LASTLIGHT_GUARDIANS", value);
+    const key = checksum.toLowerCase();
+    if (dedupe.has(key)) {
+      throw new Error(`Duplicate guardian address: ${checksum}`);
+    }
+    dedupe.add(key);
+    out.push(checksum);
+  }
+  return out;
+}
+
+async function main() {
+  const guardians = parseGuardianAddresses(requiredEnv("LASTLIGHT_GUARDIANS"));
+  const threshold = parseUint(
+    "LASTLIGHT_THRESHOLD",
+    process.env.LASTLIGHT_THRESHOLD || "3",
+    { min: 1, max: guardians.length },
+  );
+
+  const [deployer] = await hre.ethers.getSigners();
+  console.log("deployer:", deployer.address);
+  console.log("network:", hre.network.name);
+  console.log("guardian_count:", guardians.length);
+  console.log("threshold:", threshold);
+
+  const factory = await hre.ethers.getContractFactory("LastLightController");
+  const contract = await factory.deploy(guardians, threshold);
+  await contract.deployed();
+
+  console.log("lastlight_contract:", contract.address);
+
+  const output = {
+    network: hre.network.name,
+    chain_id: hre.network.config.chainId || null,
+    deployer: deployer.address,
+    lastlight_contract: contract.address,
+    guardian_count: guardians.length,
+    threshold,
+    deployment_tx_hash: contract.deployTransaction.hash,
+    guardians,
+  };
+
+  const outputPath = (process.env.LASTLIGHT_DEPLOY_OUTPUT_PATH || "").trim();
+  if (outputPath) {
+    const absolute = path.resolve(outputPath);
+    fs.mkdirSync(path.dirname(absolute), { recursive: true });
+    fs.writeFileSync(absolute, JSON.stringify(output, null, 2));
+    console.log("deployment_output:", absolute);
+  }
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exitCode = 1;
+});
diff --git a/scripts/deploy-membership.cjs b/scripts/deploy-membership.cjs
index c02cc4f..e694b11 100644
--- a/scripts/deploy-membership.cjs
+++ b/scripts/deploy-membership.cjs
@@ -2,54 +2,14 @@ const hre = require("hardhat");
 const fs = require("fs");
 const path = require("path");
 
-function requiredEnv(name) {
-  const value = process.env[name];
-  if (!value || !value.trim()) {
-    throw new Error(`Missing required env: ${name}`);
-  }
-  return value.trim();
-}
-
-function requireAddress(name, value, { allowZero = false } = {}) {
-  if (!hre.ethers.utils.isAddress(value)) {
-    throw new Error(`Invalid address for ${name}: ${value}`);
-  }
-  if (!allowZero && value === hre.ethers.constants.AddressZero) {
-    throw new Error(`${name} cannot be zero address`);
-  }
-  return value;
-}
-
-function parseUint(name, value) {
-  try {
-    const parsed = hre.ethers.BigNumber.from(value);
-    if (parsed.lt(0)) {
-      throw new Error("must be >= 0");
-    }
-    return parsed;
-  } catch (err) {
-    throw new Error(`Invalid uint for ${name}: ${value} (${err.message})`);
-  }
-}
-
 async function main() {
-  const treasury = requireAddress("TREASURY_WALLET", requiredEnv("TREASURY_WALLET"));
-  const mintCurrency = requireAddress(
-    "MINT_CURRENCY_ADDRESS",
-    (process.env.MINT_CURRENCY_ADDRESS || hre.ethers.constants.AddressZero).trim(),
-    { allowZero: true },
-  );
-  const mintAmountAtomic = parseUint("MINT_AMOUNT_ATOMIC", requiredEnv("MINT_AMOUNT_ATOMIC"));
-
   const [deployer] = await hre.ethers.getSigners();
   console.log("deployer:", deployer.address);
   console.log("network:", hre.network.name);
-  console.log("treasury:", treasury);
-  console.log("mint_currency:", mintCurrency);
-  console.log("mint_amount_atomic:", mintAmountAtomic);
+  console.log("mint_mode:", "gas_only");
 
   const factory = await hre.ethers.getContractFactory("EdutHumanMembership");
-  const contract = await factory.deploy(treasury, mintCurrency, mintAmountAtomic);
+  const contract = await factory.deploy();
   await contract.deployed();
 
   console.log("membership_contract:", contract.address);
@@ -58,9 +18,8 @@ async function main() {
     network: hre.network.name,
     chainId: hre.network.config.chainId || null,
     deployer: deployer.address,
-    treasury,
-    mintCurrency,
-    mintAmountAtomic: mintAmountAtomic.toString(),
+    mintCurrency: hre.ethers.constants.AddressZero,
+    mintAmountAtomic: "0",
     membershipContract: contract.address,
     txHash: contract.deployTransaction.hash,
   };
diff --git a/scripts/lastlight-eip712-flow.cjs b/scripts/lastlight-eip712-flow.cjs
new file mode 100644
index 0000000..99e3772
--- /dev/null
+++ b/scripts/lastlight-eip712-flow.cjs
@@ -0,0 +1,142 @@
+#!/usr/bin/env node
+const { ethers } = require("ethers");
+
+const ABI = [
+  "function releaseRecord(bytes32 releaseId) view returns (bytes32 payloadManifestHash, bytes32 encryptedPayloadRootHash, bytes32 decryptionKeyHash, bytes32 guardianSetHash, bytes32 metadataRefHash, uint64 timelockSeconds, uint64 stagedAt, uint64 armedAt, uint64 executeNotBefore, uint64 armEpoch, uint8 threshold, uint8 status)",
+  "function armReleaseWithSignatures(bytes32 releaseId, bytes32 reasonHash, uint64 deadline, bytes[] signatures)",
+  "function cancelReleaseWithSignatures(bytes32 releaseId, bytes32 reasonHash, uint64 deadline, bytes[] signatures)",
+  "function executeReleaseWithSignatures(bytes32 releaseId, bytes32 decryptionKey, bytes32 manifestRefHash, uint64 deadline, bytes[] signatures)"
+];
+
+function required(name) {
+  const value = process.env[name];
+  if (!value || !String(value).trim()) {
+    throw new Error(`missing required env ${name}`);
+  }
+  return String(value).trim();
+}
+
+function normalizeBytes32(value, fallbackLabel) {
+  if (!value || !String(value).trim()) {
+    if (!fallbackLabel) {
+      throw new Error("missing bytes32 input");
+    }
+    return ethers.utils.id(fallbackLabel);
+  }
+  const trimmed = String(value).trim();
+  if (ethers.utils.isHexString(trimmed, 32)) {
+    return trimmed;
+  }
+  return ethers.utils.id(trimmed);
+}
+
+async function main() {
+  const action = String(process.env.LASTLIGHT_ACTION || "arm").trim().toLowerCase();
+  const rpc = required("BASE_SEPOLIA_RPC_URL");
+  const contractAddress = required("LASTLIGHT_CONTRACT_ADDRESS");
+  const releaseId = normalizeBytes32(process.env.LASTLIGHT_RELEASE_ID, "last-light-release");
+  const deadlineSeconds = Number(process.env.LASTLIGHT_DEADLINE_SECONDS || "3600");
+  if (!Number.isFinite(deadlineSeconds) || deadlineSeconds <= 0) {
+    throw new Error(`invalid LASTLIGHT_DEADLINE_SECONDS=${process.env.LASTLIGHT_DEADLINE_SECONDS}`);
+  }
+
+  const provider = new ethers.providers.JsonRpcProvider(rpc);
+  const relayer = new ethers.Wallet(required("DEPLOYER_PRIVATE_KEY"), provider);
+  const contract = new ethers.Contract(contractAddress, ABI, relayer);
+  const network = await provider.getNetwork();
+  const latestBlock = await provider.getBlock("latest");
+  const deadline = Number(latestBlock.timestamp) + deadlineSeconds;
+
+  const record = await contract.releaseRecord(releaseId);
+  const armEpoch = Number(record.armEpoch);
+  const status = Number(record.status);
+  if (status !== 1 && action === "arm") {
+    throw new Error(`release must be staged before arm, current status=${status}`);
+  }
+  if (status !== 1 && status !== 2 && action === "cancel") {
+    throw new Error(`release must be staged/armed before cancel, current status=${status}`);
+  }
+  if (status !== 2 && action === "execute") {
+    throw new Error(`release must be armed before execute, current status=${status}`);
+  }
+
+  const guardianKeysRaw = required("LASTLIGHT_GUARDIAN_PRIVATE_KEYS");
+  const guardianKeys = guardianKeysRaw
+    .split(",")
+    .map((v) => v.trim())
+    .filter(Boolean);
+  if (guardianKeys.length === 0) {
+    throw new Error("no guardian keys provided");
+  }
+  const guardians = guardianKeys.map((k) => new ethers.Wallet(k, provider));
+
+  const domain = {
+    name: "EDUT Last Light",
+    version: "1",
+    chainId: network.chainId,
+    verifyingContract: contractAddress
+  };
+
+  let tx;
+  if (action === "arm") {
+    const reasonHash = normalizeBytes32(process.env.LASTLIGHT_REASON_HASH, "owner-incapacity");
+    const types = {
+      ArmIntent: [
+        { name: "releaseId", type: "bytes32" },
+        { name: "reasonHash", type: "bytes32" },
+        { name: "deadline", type: "uint64" },
+        { name: "armEpoch", type: "uint64" }
+      ]
+    };
+    const value = { releaseId, reasonHash, deadline, armEpoch };
+    const signatures = await Promise.all(guardians.map((g) => g._signTypedData(domain, types, value)));
+    tx = await contract.armReleaseWithSignatures(releaseId, reasonHash, deadline, signatures);
+  } else if (action === "cancel") {
+    const reasonHash = normalizeBytes32(process.env.LASTLIGHT_REASON_HASH, "cancelled-by-guardians");
+    const types = {
+      CancelIntent: [
+        { name: "releaseId", type: "bytes32" },
+        { name: "reasonHash", type: "bytes32" },
+        { name: "deadline", type: "uint64" },
+        { name: "armEpoch", type: "uint64" }
+      ]
+    };
+    const value = { releaseId, reasonHash, deadline, armEpoch };
+    const signatures = await Promise.all(guardians.map((g) => g._signTypedData(domain, types, value)));
+    tx = await contract.cancelReleaseWithSignatures(releaseId, reasonHash, deadline, signatures);
+  } else if (action === "execute") {
+    const decryptionKey = normalizeBytes32(process.env.LASTLIGHT_DECRYPTION_KEY, "");
+    const manifestRefHash = normalizeBytes32(process.env.LASTLIGHT_MANIFEST_REF_HASH, "manifest-ref");
+    const types = {
+      ExecuteIntent: [
+        { name: "releaseId", type: "bytes32" },
+        { name: "decryptionKey", type: "bytes32" },
+        { name: "manifestRefHash", type: "bytes32" },
+        { name: "deadline", type: "uint64" },
+        { name: "armEpoch", type: "uint64" }
+      ]
+    };
+    const value = { releaseId, decryptionKey, manifestRefHash, deadline, armEpoch };
+    const signatures = await Promise.all(guardians.map((g) => g._signTypedData(domain, types, value)));
+    tx = await contract.executeReleaseWithSignatures(releaseId, decryptionKey, manifestRefHash, deadline, signatures);
+  } else {
+    throw new Error(`unsupported LASTLIGHT_ACTION=${action}`);
+  }
+
+  const receipt = await tx.wait();
+  console.log(JSON.stringify({
+    ok: true,
+    action,
+    chain_id: network.chainId,
+    contract: contractAddress,
+    release_id: releaseId,
+    arm_epoch: armEpoch,
+    tx_hash: tx.hash,
+    block_number: receipt.blockNumber
+  }, null, 2));
+}
+
+main().catch((err) => {
+  console.error(JSON.stringify({ ok: false, error: err.message }, null, 2));
+  process.exit(1);
+});
diff --git a/scripts/validate-runtime-addresses.cjs b/scripts/validate-runtime-addresses.cjs
index 52539cd..b656b11 100644
--- a/scripts/validate-runtime-addresses.cjs
+++ b/scripts/validate-runtime-addresses.cjs
@@ -62,7 +62,6 @@ function main() {
 
   assert(Number(membership.chainId) === 84532, `membership chainId mismatch: ${membership.chainId}`);
   requireAddress("membership.membershipContract", membership.membershipContract);
-  requireAddress("membership.treasury", membership.treasury);
   requireUintString("membership.mintAmountAtomic", membership.mintAmountAtomic);
 
   assert(Number(entitlement.chainId) === 84532, `entitlement chainId mismatch: ${entitlement.chainId}`);
@@ -83,10 +82,6 @@ function main() {
     normalizedAddress(runtime.entitlement_contract) === normalizedAddress(entitlement.entitlementContract),
     "runtime entitlement_contract mismatch with entitlement deploy artifact"
   );
-  assert(
-    normalizedAddress(runtime.treasury_wallet) === normalizedAddress(membership.treasury),
-    "runtime treasury_wallet mismatch with membership deploy artifact"
-  );
   assert(
     normalizedAddress(runtime.treasury_wallet) === normalizedAddress(entitlement.treasury),
     "runtime treasury_wallet mismatch with entitlement deploy artifact"
diff --git a/test/EdutHumanMembership.test.js b/test/EdutHumanMembership.test.js
index f9c687c..b0b40a6 100644
--- a/test/EdutHumanMembership.test.js
+++ b/test/EdutHumanMembership.test.js
@@ -12,23 +12,20 @@ describe("EdutHumanMembership", function () {
   }
 
   async function deployFixture() {
-    const [deployer, treasury, sponsor, recipient, other] = await ethers.getSigners();
+    const [deployer, sponsor, recipient, other] = await ethers.getSigners();
     const factory = await ethers.getContractFactory("EdutHumanMembership", deployer);
-    const price = ethers.utils.parseEther("0.002");
-    const contract = await factory.deploy(treasury.address, ethers.constants.AddressZero, price);
+    const contract = await factory.deploy();
     await contract.deployed();
-    return { contract, deployer, treasury, sponsor, recipient, other, price };
+    return { contract, deployer, sponsor, recipient, other };
   }
 
-  it("mints to recipient with sponsor payment", async function () {
-    const { contract, treasury, sponsor, recipient, price } = await deployFixture();
-    const before = await ethers.provider.getBalance(treasury.address);
-
-    const tx = await contract.connect(sponsor).mintMembership(recipient.address, { value: price });
+  it("mints to recipient with gas-only sponsored call", async function () {
+    const { contract, sponsor, recipient } = await deployFixture();
+    const tx = await contract.connect(sponsor).mintMembership(recipient.address);
     await tx.wait();
 
-    const after = await ethers.provider.getBalance(treasury.address);
-    expect(after.sub(before).eq(price)).to.equal(true);
+    expect(await contract.name()).to.equal("EDUT ID");
+    expect(await contract.symbol()).to.equal("EID");
     expect(await contract.ownerOf(1)).to.equal(recipient.address);
 
     const token = await contract.tokenOf(recipient.address);
@@ -38,32 +35,33 @@ describe("EdutHumanMembership", function () {
   });
 
   it("rejects duplicate mint for same human wallet", async function () {
-    const { contract, sponsor, recipient, price } = await deployFixture();
-    await (await contract.connect(sponsor).mintMembership(recipient.address, { value: price })).wait();
+    const { contract, sponsor, recipient } = await deployFixture();
+    await (await contract.connect(sponsor).mintMembership(recipient.address)).wait();
 
     await expectRevertWithCustomError(
-      contract.connect(sponsor).mintMembership(recipient.address, { value: price }),
+      contract.connect(sponsor).mintMembership(recipient.address),
       "AlreadyMinted"
     );
   });
 
-  it("supports owner-configurable price and owner-only admin", async function () {
-    const { contract, deployer, other } = await deployFixture();
-    const nextPrice = ethers.utils.parseEther("0.003");
-
-    await expectRevertWithCustomError(
-      contract.connect(other).updateMintPrice(ethers.constants.AddressZero, nextPrice),
-      "NotOwner"
-    );
-
-    await (await contract.connect(deployer).updateMintPrice(ethers.constants.AddressZero, nextPrice)).wait();
+  it("always reports zero mint price", async function () {
+    const { contract } = await deployFixture();
     const price = await contract.currentMintPrice();
-    expect(price.amountAtomic.eq(nextPrice)).to.equal(true);
+    expect(price.currency).to.equal(ethers.constants.AddressZero);
+    expect(price.amountAtomic.toNumber()).to.equal(0);
+  });
+
+  it("rejects accidental ETH value", async function () {
+    const { contract, sponsor, recipient } = await deployFixture();
+    await expectRevertWithCustomError(
+      contract.connect(sponsor).mintMembership(recipient.address, { value: 1 }),
+      "UnexpectedEthValue"
+    );
   });
 
   it("blocks transfer paths (soulbound)", async function () {
-    const { contract, sponsor, recipient, other, price } = await deployFixture();
-    await (await contract.connect(sponsor).mintMembership(recipient.address, { value: price })).wait();
+    const { contract, sponsor, recipient, other } = await deployFixture();
+    await (await contract.connect(sponsor).mintMembership(recipient.address)).wait();
 
     await expectRevertWithCustomError(
       contract.connect(recipient).transferFrom(recipient.address, other.address, 1),
@@ -72,50 +70,10 @@ describe("EdutHumanMembership", function () {
   });
 
   it("allows owner to update status", async function () {
-    const { contract, deployer, sponsor, recipient, price } = await deployFixture();
-    await (await contract.connect(sponsor).mintMembership(recipient.address, { value: price })).wait();
+    const { contract, deployer, sponsor, recipient } = await deployFixture();
+    await (await contract.connect(sponsor).mintMembership(recipient.address)).wait();
     await (await contract.connect(deployer).setMembershipStatus(recipient.address, 2)).wait();
 
     expect(await contract.membershipStatus(recipient.address)).to.equal(2);
   });
-
-  it("supports ERC20 settlement path for USDC-style pricing", async function () {
-    const [deployer, treasury, sponsor, recipient] = await ethers.getSigners();
-    const tokenFactory = await ethers.getContractFactory("MockERC20", deployer);
-    const usdc = await tokenFactory.deploy("Mock USDC", "USDC", 6);
-    await usdc.deployed();
-
-    const membershipFactory = await ethers.getContractFactory("EdutHumanMembership", deployer);
-    const usdcPrice = ethers.BigNumber.from("100000000"); // 100 USDC with 6 decimals
-    const contract = await membershipFactory.deploy(treasury.address, usdc.address, usdcPrice);
-    await contract.deployed();
-
-    await (await usdc.mint(sponsor.address, usdcPrice)).wait();
-    await (await usdc.connect(sponsor).approve(contract.address, usdcPrice)).wait();
-
-    const before = await usdc.balanceOf(treasury.address);
-    await (await contract.connect(sponsor).mintMembership(recipient.address)).wait();
-    const after = await usdc.balanceOf(treasury.address);
-
-    expect(after.sub(before).eq(usdcPrice)).to.equal(true);
-    expect(await contract.hasMembership(recipient.address)).to.equal(true);
-  });
-
-  it("fails ERC20 mint without allowance", async function () {
-    const [deployer, treasury, sponsor, recipient] = await ethers.getSigners();
-    const tokenFactory = await ethers.getContractFactory("MockERC20", deployer);
-    const usdc = await tokenFactory.deploy("Mock USDC", "USDC", 6);
-    await usdc.deployed();
-
-    const membershipFactory = await ethers.getContractFactory("EdutHumanMembership", deployer);
-    const usdcPrice = ethers.BigNumber.from("100000000");
-    const contract = await membershipFactory.deploy(treasury.address, usdc.address, usdcPrice);
-    await contract.deployed();
-
-    await (await usdc.mint(sponsor.address, usdcPrice)).wait();
-    await expectRevertWithCustomError(
-      contract.connect(sponsor).mintMembership(recipient.address),
-      "PaymentTransferFailed"
-    );
-  });
 });
diff --git a/test/LastLightController.test.js b/test/LastLightController.test.js
new file mode 100644
index 0000000..f275052
--- /dev/null
+++ b/test/LastLightController.test.js
@@ -0,0 +1,229 @@
+const { expect } = require("chai");
+const { ethers, network } = require("hardhat");
+
+describe("LastLightController", function () {
+  async function futureDeadline(seconds) {
+    const block = await ethers.provider.getBlock("latest");
+    return block.timestamp + seconds;
+  }
+
+  async function expectRevertWithCustomError(promise, errorName) {
+    try {
+      await promise;
+      expect.fail(`expected revert ${errorName}`);
+    } catch (err) {
+      expect(String(err)).to.contain(errorName);
+    }
+  }
+
+  async function signArm(contract, signer, releaseId, reasonHash, deadline, armEpoch) {
+    const domain = {
+      name: "EDUT Last Light",
+      version: "1",
+      chainId: await signer.getChainId(),
+      verifyingContract: contract.address
+    };
+    const types = {
+      ArmIntent: [
+        { name: "releaseId", type: "bytes32" },
+        { name: "reasonHash", type: "bytes32" },
+        { name: "deadline", type: "uint64" },
+        { name: "armEpoch", type: "uint64" }
+      ]
+    };
+    const value = { releaseId, reasonHash, deadline, armEpoch };
+    return signer._signTypedData(domain, types, value);
+  }
+
+  async function signCancel(contract, signer, releaseId, reasonHash, deadline, armEpoch) {
+    const domain = {
+      name: "EDUT Last Light",
+      version: "1",
+      chainId: await signer.getChainId(),
+      verifyingContract: contract.address
+    };
+    const types = {
+      CancelIntent: [
+        { name: "releaseId", type: "bytes32" },
+        { name: "reasonHash", type: "bytes32" },
+        { name: "deadline", type: "uint64" },
+        { name: "armEpoch", type: "uint64" }
+      ]
+    };
+    const value = { releaseId, reasonHash, deadline, armEpoch };
+    return signer._signTypedData(domain, types, value);
+  }
+
+  async function signExecute(contract, signer, releaseId, decryptionKey, manifestRefHash, deadline, armEpoch) {
+    const domain = {
+      name: "EDUT Last Light",
+      version: "1",
+      chainId: await signer.getChainId(),
+      verifyingContract: contract.address
+    };
+    const types = {
+      ExecuteIntent: [
+        { name: "releaseId", type: "bytes32" },
+        { name: "decryptionKey", type: "bytes32" },
+        { name: "manifestRefHash", type: "bytes32" },
+        { name: "deadline", type: "uint64" },
+        { name: "armEpoch", type: "uint64" }
+      ]
+    };
+    const value = { releaseId, decryptionKey, manifestRefHash, deadline, armEpoch };
+    return signer._signTypedData(domain, types, value);
+  }
+
+  async function deployFixture() {
+    const [owner, g1, g2, g3, g4, g5, relayer, other] = await ethers.getSigners();
+    const factory = await ethers.getContractFactory("LastLightController", owner);
+    const contract = await factory.deploy([g1.address, g2.address, g3.address, g4.address, g5.address], 3);
+    await contract.deployed();
+    return { contract, owner, g1, g2, g3, g4, g5, relayer, other };
+  }
+
+  async function stageDefault(contract, owner) {
+    const releaseId = ethers.utils.id("last-light-release-001");
+    const payloadManifestHash = ethers.utils.id("payload-manifest");
+    const encryptedPayloadRootHash = ethers.utils.id("encrypted-root");
+    const decryptionKey = ethers.utils.id("decryption-key");
+    const decryptionKeyHash = ethers.utils.keccak256(ethers.utils.defaultAbiCoder.encode(["bytes32"], [decryptionKey]));
+    const metadataRefHash = ethers.utils.id("metadata-ref");
+    const timelock = 3600;
+    await (await contract.connect(owner).stageRelease(
+      releaseId,
+      payloadManifestHash,
+      encryptedPayloadRootHash,
+      decryptionKeyHash,
+      metadataRefHash,
+      timelock
+    )).wait();
+    const record = await contract.releaseRecord(releaseId);
+    return { releaseId, decryptionKey, armEpoch: Number(record.armEpoch), timelock };
+  }
+
+  it("requires quorum to arm and execute", async function () {
+    const { contract, owner, g1, g2, g3, relayer } = await deployFixture();
+    const { releaseId, decryptionKey, armEpoch, timelock } = await stageDefault(contract, owner);
+    const reasonHash = ethers.utils.id("owner-incapacity");
+    const manifestRefHash = ethers.utils.id("manifest-ref-hash");
+    const deadline = await futureDeadline(24 * 3600);
+
+    const armSig1 = await signArm(contract, g1, releaseId, reasonHash, deadline, armEpoch);
+    await expectRevertWithCustomError(
+      contract.connect(relayer).armReleaseWithSignatures(releaseId, reasonHash, deadline, [armSig1]),
+      "InvalidGuardianQuorum"
+    );
+
+    const armSig2 = await signArm(contract, g2, releaseId, reasonHash, deadline, armEpoch);
+    const armSig3 = await signArm(contract, g3, releaseId, reasonHash, deadline, armEpoch);
+    await (await contract.connect(relayer).armReleaseWithSignatures(releaseId, reasonHash, deadline, [armSig1, armSig2, armSig3])).wait();
+
+    const executeSig1 = await signExecute(contract, g1, releaseId, decryptionKey, manifestRefHash, deadline, armEpoch);
+    const executeSig2 = await signExecute(contract, g2, releaseId, decryptionKey, manifestRefHash, deadline, armEpoch);
+    const executeSig3 = await signExecute(contract, g3, releaseId, decryptionKey, manifestRefHash, deadline, armEpoch);
+    await expectRevertWithCustomError(
+      contract.connect(relayer).executeReleaseWithSignatures(
+        releaseId,
+        decryptionKey,
+        manifestRefHash,
+        deadline,
+        [executeSig1, executeSig2, executeSig3]
+      ),
+      "ExecutionTimelockActive"
+    );
+
+    await network.provider.send("evm_increaseTime", [timelock + 1]);
+    await network.provider.send("evm_mine");
+
+    await (await contract.connect(relayer).executeReleaseWithSignatures(
+      releaseId,
+      decryptionKey,
+      manifestRefHash,
+      deadline,
+      [executeSig1, executeSig2, executeSig3]
+    )).wait();
+    const record = await contract.releaseRecord(releaseId);
+    expect(record.status).to.equal(3); // Executed
+  });
+
+  it("requires quorum to cancel; single guardian cannot cancel", async function () {
+    const { contract, owner, g1, g2, g3, relayer } = await deployFixture();
+    const { releaseId, armEpoch } = await stageDefault(contract, owner);
+    const reasonHash = ethers.utils.id("owner-incapacity");
+    const cancelReasonHash = ethers.utils.id("false-alarm");
+    const deadline = await futureDeadline(24 * 3600);
+
+    const armSig1 = await signArm(contract, g1, releaseId, reasonHash, deadline, armEpoch);
+    const armSig2 = await signArm(contract, g2, releaseId, reasonHash, deadline, armEpoch);
+    const armSig3 = await signArm(contract, g3, releaseId, reasonHash, deadline, armEpoch);
+    await (await contract.connect(relayer).armReleaseWithSignatures(releaseId, reasonHash, deadline, [armSig1, armSig2, armSig3])).wait();
+
+    const cancelSig1 = await signCancel(contract, g1, releaseId, cancelReasonHash, deadline, armEpoch);
+    await expectRevertWithCustomError(
+      contract.connect(relayer).cancelReleaseWithSignatures(releaseId, cancelReasonHash, deadline, [cancelSig1]),
+      "InvalidGuardianQuorum"
+    );
+
+    const cancelSig2 = await signCancel(contract, g2, releaseId, cancelReasonHash, deadline, armEpoch);
+    const cancelSig3 = await signCancel(contract, g3, releaseId, cancelReasonHash, deadline, armEpoch);
+    await (await contract.connect(relayer).cancelReleaseWithSignatures(
+      releaseId,
+      cancelReasonHash,
+      deadline,
+      [cancelSig1, cancelSig2, cancelSig3]
+    )).wait();
+    const record = await contract.releaseRecord(releaseId);
+    expect(record.status).to.equal(4); // Canceled
+  });
+
+  it("rejects execute when decryption key hash does not match staged commitment", async function () {
+    const { contract, owner, g1, g2, g3, relayer } = await deployFixture();
+    const { releaseId, armEpoch, timelock } = await stageDefault(contract, owner);
+    const reasonHash = ethers.utils.id("owner-incapacity");
+    const deadline = await futureDeadline(24 * 3600);
+    const armSig1 = await signArm(contract, g1, releaseId, reasonHash, deadline, armEpoch);
+    const armSig2 = await signArm(contract, g2, releaseId, reasonHash, deadline, armEpoch);
+    const armSig3 = await signArm(contract, g3, releaseId, reasonHash, deadline, armEpoch);
+    await (await contract.connect(relayer).armReleaseWithSignatures(releaseId, reasonHash, deadline, [armSig1, armSig2, armSig3])).wait();
+
+    await network.provider.send("evm_increaseTime", [timelock + 1]);
+    await network.provider.send("evm_mine");
+
+    const wrongKey = ethers.utils.id("wrong-key");
+    const manifestRefHash = ethers.utils.id("manifest-ref");
+    const executeSig1 = await signExecute(contract, g1, releaseId, wrongKey, manifestRefHash, deadline, armEpoch);
+    const executeSig2 = await signExecute(contract, g2, releaseId, wrongKey, manifestRefHash, deadline, armEpoch);
+    const executeSig3 = await signExecute(contract, g3, releaseId, wrongKey, manifestRefHash, deadline, armEpoch);
+    await expectRevertWithCustomError(
+      contract.connect(relayer).executeReleaseWithSignatures(
+        releaseId,
+        wrongKey,
+        manifestRefHash,
+        deadline,
+        [executeSig1, executeSig2, executeSig3]
+      ),
+      "InvalidDecryptionKey"
+    );
+  });
+
+  it("invalidates staged release if guardian set changes", async function () {
+    const { contract, owner, g1, g2, g3, g4, g5, other, relayer } = await deployFixture();
+    const { releaseId, armEpoch } = await stageDefault(contract, owner);
+
+    await (await contract.connect(owner).setGuardians([g1.address, g2.address, g3.address, g4.address, other.address], 3)).wait();
+
+    const reasonHash = ethers.utils.id("owner-incapacity");
+    const deadline = await futureDeadline(24 * 3600);
+    const armSig1 = await signArm(contract, g1, releaseId, reasonHash, deadline, armEpoch);
+    const armSig2 = await signArm(contract, g2, releaseId, reasonHash, deadline, armEpoch);
+    const armSig3 = await signArm(contract, g3, releaseId, reasonHash, deadline, armEpoch);
+    await expectRevertWithCustomError(
+      contract.connect(relayer).armReleaseWithSignatures(releaseId, reasonHash, deadline, [armSig1, armSig2, armSig3]),
+      "GuardianSetChanged"
+    );
+
+    // ensure old guardian is no longer active in current set
+    expect(await contract.isGuardian(g5.address)).to.equal(false);
+  });
+});