[TMP - IGNORE] Show STORAGE verbosity diff in hh2 vs hh3

hh2/.gitignore

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+# Node modules
+/node_modules
+
+# Hardhat build artifacts / cache
+/artifacts
+/cache
+
+# Typechain output
+/typechain-types

hh2/contracts/Initializable__Mock.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.9;
+
+/// @dev Minimal mock used to demonstrate the storage-tracing difference
+///      between Hardhat 2 (`hardhat-tracer`) and Hardhat 3 (`-v`).
+///
+///      `_version` (uint8) and `_initialized` (bool) are packed into the
+///      same storage slot (slot 0), so `initialize` performs two SSTOREs
+///      into that single slot, and `version()` performs one SLOAD.
+contract Initializable__Mock {
+    uint8 private _version;
+    bool private _initialized;
+
+    event Initialized(uint256 version);
+
+    function initialize(uint8 _v) public payable {
+        require(!_initialized, "Contract is already initialized");
+        _version = _v; // SSTORE
+        _initialized = true; // SSTORE (packed into the same slot)
+        emit Initialized(_v);
+    }
+
+    function version() public view returns (uint8) {
+        return _version; // SLOAD
+    }
+}

hh2/hardhat.config.js

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+require("@nomicfoundation/hardhat-ethers");
+require("@nomicfoundation/hardhat-chai-matchers");
+// hardhat-tracer adds the --trace / --fulltrace / --v..--vvvv flags to
+// `hardhat test`. It is the plugin that renders [SLOAD]/[SSTORE] lines.
+require("hardhat-tracer");
+
+/** @type import('hardhat/config').HardhatUserConfig */
+module.exports = {
+  // Same compiler as the HH3 project so the bytecode (and therefore the
+  // storage layout / opcodes) is identical on both sides.
+  solidity: "0.8.9",
+};