Implemented Imd6900: 1 billion IMD6900, 18 decimals, minted once to the deployer. Includes vendored dependencies, tests, and deployment documentation.

Validation passed:

• forge build with Solidity 0.8.26
• forge test --threads 4: 27 tests passed with a cleared environment, including fuzz and invariant checks
• forge fmt --check

The external protected launch harness was not run locally; its required integration inputs are documented.

Created launch.json matching the accepted constructor, exact supply, economics, and paired currency.

Validation passed against the supplied schema and constructor ABI. forge build succeeded; all 27 tests passed.

Only launch.json is changed for submission.

The review is complete. The findings file holds an empty findings list and seven coverage rows, and the working tree is unchanged apart from that file.

Result: no defects found in the math, boundary, or numerical-gap area.

What I checked and how:

• Supply constant. The constructor literal is a compile-time constant equal to 10^27. I confirmed that exact value in the creation bytecode. It divides by 10^18 with zero remainder, fits in uint96, and the aderyn "large numeric literal" lead is style only.
• Vendored library integrity. All six OpenZeppelin files in lib/ are byte-identical to the upstream v5.0.2 archive, and the archive hash matches lib/README.md. The unchecked blocks in transfer and allowance spending are therefore the audited upstream ones, each guarded by an explicit comparison before the subtraction.
• Edge probes. I wrote and ran eleven scratch tests: 1-wei transfers, exact-balance and balance-plus-one, exact-allowance and allowance-plus-one, max-minus-one allowance being finite, max-uint amounts, a receiver already holding the full supply, 32-holder dust splits summing to the supply, launch split percentages having no remainder, and ETH rejection with and without calldata. All passed. The scratch directory has been removed.
• Boundary enumeration. The token has no external calls, no payable, receive, or fallback function, and decodes no bytes, so the Boundary guide's call-site and payable checks have nothing to exercise.
• Project suite. All 27 shipped tests pass, including the 128-run invariant.

Coverage rows mark all three ABI entry points as holds, plus four invariant rows for the mint constant, supply conservation, launch split arithmetic, and the absence of external boundaries. Nothing in my area was left unreached.

The review is complete and .imd-findings.json is written at the repository root. The tree is otherwise unchanged (git status is clean apart from the ignored findings file, and the scratch tests were removed).

Result: no defects in the Access Control, Trust Gap or Asymmetry areas. The token is a fixed-supply ERC-20 with no privileged surface, and the one item I recorded is informational.

What I verified:

• Permission model. The compiled ABI exposes only the constructor, six views, and the three ERC-20 writers. There is no owner, initializer, pause, blacklist, freeze, seize, burnFrom, receive or fallback. The deployer gains no power over holders: a scratch test confirmed the deployer cannot transferFrom a holder without allowance.
• Supply and mint. The single _mint is in the constructor, mints exactly 10^27 to msg.sender (the factory under CREATE2), and nothing reachable after deployment can grow or move supply.
• Bytecode. An opcode scan of the deployed runtime found no DELEGATECALL, CALLCODE, SELFDESTRUCT, or any CALL/CREATE-family opcode. The metadata hash is absent as required.
• Dependency integrity. I downloaded the OpenZeppelin v5.0.2 archive, matched its SHA-256 against lib/README.md, and diffed all six vendored files. They are byte-identical. No submodules exist.
• Asymmetry and trust gaps. approve overwrites while transferFrom decrements. That is the standard ERC-20 approval replacement race, reproduced with a scratch test and reported as informational since only a spender the holder already trusts can use it, and the README documents the mitigation. No fee, setter, price or recipient exists, so no trust-gap seam can be formed.
• Static analysis lead. The aderyn large-numeric-literal note is a compile-time constant equal to the stated supply. No defect.

The coverage record has nine rows: the three listed entry points, plus six invariant rows covering the mint, privileged surface, opcodes, dependency integrity, trust-gap seams and the static-analysis lead. Existing project tests also pass (27 tests, including the stateful invariant).

Review complete. No defects found in the assigned area, and the findings file is in place.

Outcome. The token at src/Imd6900.sol is an unmodified OpenZeppelin v5.0.2 ERC-20 with a single constructor mint of 10^27 base units to msg.sender. I checked it against every failure mode in the Economic Security, Invariant and Flow Gap guides and found nothing to report. The findings file holds an empty list and ten coverage rows, all holds.

What I verified, with concrete inputs:

• Supply and custody at deployment. A CREATE2 factory probe deploying the token ends with the factory holding exactly 10^27 and totalSupply equal to that. No path increments supply afterwards: the ABI exposes only approve, transfer and transferFrom as state-changing functions.
• Launch flows arrive whole. Factory to distributor (10 percent), an uneven seven-way claim split, a seed through a Uniswap v4 style sync/settle balance delta, and a trader buy followed by a sell back all moved exactly the stated amounts. Supply stayed constant throughout.
• Allowance accounting. A finite allowance of 400 ether is consumed to zero and the next 1-wei pull reverts. A max allowance is not decremented.
• Sentinels and boundaries. Transfers and approvals involving the zero address revert with typed errors. Self-transfer, zero-value transfer, and whole-supply transfer behave correctly. Supply plus one reverts.
• Conservation. A 512-run fuzz over arbitrary recipients plus the project's own 128-sequence invariant keep the sum of balances equal to totalSupply.
• Dependency integrity. All six vendored OpenZeppelin files are byte-identical to the upstream v5.0.2 tarball, whose hash matches the one recorded in the repo. No git submodule exists, and the project builds and tests offline.

Leads I checked and dropped. The aderyn large-numeric-literal line is a compile-time constant that evaluates to exactly 10^27. The ERC-20 approval replacement race is standard behaviour and is already documented in the README, so it is not a defect of this token.

Not covered. I did not run the real Uniswap v4 PoolManager or the network's protected harness, since v4 is not vendored here. My pool checks used a minimal sync/settle mock that reproduces v4's balance-delta accounting. The scratch test was removed after running, leaving the working tree unchanged apart from the findings file.

The review is complete. The findings file is written, validated, and excluded from git by the harness's own exclude rule, and the working tree is otherwise untouched.

Outcome: no defects in the token. Imd6900 is a 13-line wrapper over the unmodified OpenZeppelin v5.0.2 ERC20 that mints exactly 10^27 base units to the deployer in the constructor. All three entry points behave as the standard specifies at every boundary I traced, and nothing in the contract can grow supply, move, or freeze a holder's balance.

What I checked, by guide:

• Execution Trace. Traced approve, transfer, and transferFrom from entry to storage with concrete values: zero recipient, zero sender, zero amount, self-transfer, spender equal to owner, max and max-minus-one allowances, allowance rollback on failed transfers. A scratch Foundry test confirmed each, including the launch flow from a CREATE2 factory at an etched address with a 10% / 90% / remainder split arriving exact and a one-wei overdraw reverting.
• Periphery. Downloaded both upstream archives. Their SHA-256 hashes match the vendor README. All six OpenZeppelin files are byte-identical. Seven forge-std files are whitespace-reformatted only. No submodules or gitlinks exist.
• First Principles. Verified the literal equals 10^27, decimals default to 18, name and symbol match the brief, storage holds nothing beyond the five ERC20 slots, and no payable path or fallback exists. An independent opcode scan of the compiled runtime found no DELEGATECALL, CALLCODE, SELFDESTRUCT, or any call-family opcode. Fuzzing 512 random selectors left supply unchanged.

One informational finding reported. The vendor README claims upstream sources are unmodified, but seven forge-std files differ from the recorded archive. The differences are formatting only and forge-std is test-only, so the token is unaffected. The reproduction in the file gives the exact cmp output.

Coverage record. All three listed entry points are marked holds, plus eleven invariant rows covering constructor mint, supply immutability, privileged-call absence, launch-flow exactness, decimals, forbidden opcodes, native currency rejection, dependency provenance, and the aderyn large-literal lead, which is style only.

Not reached. The protected test's Uniswap v4 seed and swap could not be executed locally because the v4 dependencies and launch environment variables are not in this tree. Since the token has no transfer override, the pool manager sees a plain ERC20 and those flows have no token-side failure path, but the actual pool math was not run here.

Added 18 boundary, authorization, and fuzz tests. Extended invariants to check balances, allowances, and rejected calls across 16,384 random operations.

forge build and forge test pass: 45 tests, zero failures or skips. Only test/ changed. No defects found in these checks.

The review is complete. The findings file is written, and the working tree holds no other changes.

Outcome: Imd6900 is a plain OpenZeppelin v5.0.2 ERC-20 with a single constructor mint, and I found no code defect. Both specialist findings reproduced and are kept at informational severity. No finding is critical or high, so no proof test is attached.

Findings kept, both reproduced against the tree

• Vendored provenance claim is inaccurate. The README in lib/ says upstream files are unmodified. The six OpenZeppelin files are byte-identical to the v5.0.2 archive, but 7 of 30 forge-std v1.9.7 files differ by whitespace only. forge-std is test-only, so bytecode and tests are unaffected. This is a documentation fix.
• Standard ERC-20 approval overwrite race. Reproduced with a scratch test where a trusted spender moves old plus new allowance when the holder replaces a nonzero grant. It is inherited standard behaviour, already documented with its mitigation in the project README, and not a defect in the requested design.

What I verified myself

• Build and all 45 project tests pass, including fuzz and invariant suites.
• The constructor mints exactly the manifest supply to the deployer with 18 decimals and matching name and symbol.
• The ABI exposes only approve, transfer and transferFrom as state-changing. There is no mint, owner, pause, blacklist, proxy, receive or fallback path.
• An opcode scan of the compiled runtime from the build artifact finds no DELEGATECALL, CALLCODE or SELFDESTRUCT.
• Ether sent to the token reverts, and all revert paths behave as the OpenZeppelin implementation specifies.

Coverage: all three entry points are recorded as holds, with three extra rows for the constructor and supply invariant, the privileged-path and opcode checks, and the dependency provenance finding. The scratch test directory was removed after use.