Implemented Yolo (YOLO): 1,000,000,000 tokens with 18 decimals, minted once to the deployer. No administrative or additional minting powers.

Included vendored dependencies, success/failure tests, fuzz and invariant tests, and deployment documentation.

All required checks pass with Solidity 0.8.26:

• forge build, including a clean offline build
• forge test with the supplied fuzz seed
• forge fmt --check

I found no defects in the math area. .imd-findings.json holds an empty findings list and a coverage row for each of the three entry points, plus two invariant rows. All rows are holds.

What I checked. src/Yolo.sol is a plain OpenZeppelin v5.0.2 ERC20. It has one constant, INITIAL_SUPPLY = 1_000_000_000 * 10 ** 18, which is exactly 10^27, and it mints that once to msg.sender in the constructor. The OpenZeppelin files it pulls in match the SHA-256 hashes in dependencies.lock.json, so the library code I read is the unmodified release.

• Math Precision: the token never divides, multiplies at runtime, narrows a type, shifts bits or converts between scales, so rounding, precision loss and overflow cannot arise. The two unchecked subtractions (balance in _update, allowance in _spendAllowance) each come right after a check that the amount is available. The unchecked addition to the recipient's balance can't overflow because all balances together equal the total supply, 10^27.
• Boundary: a zero amount, a holder's full balance, sending to yourself, and an allowance of 0 or the maximum value all behave correctly. Sending from, sending to, or approving the zero address reverts. There are no external calls, payable functions or decoded byte inputs to check.
• Numerical Gap: nothing combines precision, boundaries and invariants in a way that matters. The total supply can't change after deployment, because minting is only reachable from the constructor and burning is never reachable, so the supply always equals the sum of balances.
• Static-analysis lead: aderyn's "large numeric literal" warning at src/Yolo.sol:10 is about style. The value is correct and matches the brief, so I didn't report it.

The existing suite passes: 33 tests, including the fuzz and invariant tests. I didn't write any reproduction tests, since there was nothing to reproduce.

Untracked files I didn't create. git status lists files I didn't make in the repository root: .bashrc, .bash_profile, .profile, .zprofile, .zshrc, .gitconfig, .gitmodules, .mcp.json, .ripgreprc, .claude/, .idea, .vscode. I left them alone. Since a submission that changes files is rejected, check where they came from before uploading. My only write was .imd-findings.json, which doesn't appear in git status, so it is probably git-ignored.

Created launch.json matching the accepted Yolo constructor, exact supply, pool settings, and economics. No other deliverable files changed.

Validation passed: manifest and constructor ABI checks, forge build, and all 33 local tests using the supplied fuzz seed.

The review is complete. The findings file is valid, its one cited snippet matches the tree exactly, and no tracked file was changed.

Result: the assigned area is clean. Yolo is the unmodified OpenZeppelin v5.0.2 ERC20 with a constructor that mints the full supply to msg.sender. There are no roles, modifiers, setters, initializers, callbacks, proxies or privileged functions, so the Access Control, Trust Gap and Asymmetry checklists find nothing to break. The three entry points, approve, transfer and transferFrom, each guard on msg.sender or the caller's allowance, share one _update path, move exact amounts for the factory, distributor and pool flows, and roll back fully on failure. I verified the vendored ERC20 sources byte for byte against upstream commit dbb6104c, built the project, and ran the full suite with the project's seed. All 33 tests and both invariants passed.

One low finding, outside the assigned area. Seven vendored forge-std files do not match the digests in dependencies.lock.json, although the README says the lock covers every vendored file and that they are unmodified upstream sources. I fetched the upstream files at the pinned commit. The lock digests match upstream, and the local copies differ only by whitespace, consistent with forge fmt having been run over lib. Test behavior is unaffected and no production bytecode imports forge-std, so this is an integrity-record defect only. The fix is to restore those seven files or regenerate their digests.

Coverage record. Seven rows were written: the three listed entry points and the constructor hold, two invariant rows for hidden entry points and transfer symmetry hold, and one integrity-record row points to the finding. No proof test was written because nothing reached high or critical.

The review is complete. The findings file holds an empty findings list and eight coverage rows, the scratch directory is removed, and the working tree has no changes other than the findings file.

Result: no defects found in the Economic Security, Invariant or Flow Gap areas.

The Yolo token is a 16-line contract that inherits OpenZeppelin v5.0.2 ERC-20 unchanged and mints exactly 10^27 units to its deployer in the constructor. There is no custom transfer logic, no owner, no external dependency and no callback, so none of the failure modes in my three guides have a surface to act on.

What I verified:

• Vendored dependency integrity. The ERC20 and Context sources match the upstream files at the pinned commit byte for byte, so the behavior reviewed is the behavior deployed.
• ABI surface. The compiled ABI has only approve, transfer and transferFrom as state-changing functions, plus views. No mint, burn, pause, blacklist or upgrade path exists, and the runtime contains no DELEGATECALL, CALLCODE or SELFDESTRUCT.
• Launch flows arrive whole. A scratch test emulated the pool manager's sync and settle balance-delta accounting. The swarm transfer, the contributor claim, the single-sided seed, a buy through take, and a sell back all moved exactly the stated amount.
• Conservation invariants. A 512-run fuzz across eight holders with direct and delegated transfers kept the balance sum equal to total supply, and total supply stayed at 10^27. The project's own 128-run invariant suite also passed.
• Atomicity. Failed transfers and delegated transfers leave balances and allowances untouched.
• Static analysis lead. The aderyn large-literal note on line 10 is style only. The literal evaluates to exactly 10^27.

Two items are documented limitations rather than defects and are noted in the coverage rows: the standard ERC-20 approval-replacement race, which the README already warns about, and the fact that tokens sent to the contract itself cannot be recovered, which follows from the requested no-administrator design.

Not covered: the real Uniswap v4 PoolManager seed and swap, since v4-core is not vendored in this project. The protected launch harness runs that separately, and my balance-delta emulation of its settlement is the closest local substitute.

I added two test files on top of the existing suite. forge build succeeds, and forge test with the verifier's seed passes all 52 tests in 4 suites with 0 failures, including the 33 tests that were already there.

I found no defects, so I did not write .imd-findings.json. src/Yolo.sol is plain OpenZeppelin ERC20. It mints exactly 10^27 units to msg.sender once in the constructor, and nothing else reaches mint or burn: no owner, no pause, no other privileged calls. Two behaviours are worth knowing but aren't bugs; both are standard, and the existing SECURITY_REVIEW.md already covers the first:

• Changing an approval simply overwrites the old amount. The token has no increaseAllowance, decreaseAllowance or permit.
• Tokens sent to the token's own address are stuck for good, because there is no way to recover them.

test/Yolo.edge.t.sol (18 tests, unit and fuzz):

• Supply: it is exactly 1e27, checked against an independent number, and every deployment mints its own supply once.
• One-call launch: a helper deploys the token and splits it 10/60/30 within a single call, as the real launch does in one transaction. It confirms the supply is whole and with the deployer right after the constructor, and that a second deploy with the same salt reverts.
• Failure paths:
  • An owner can't use transferFrom on their own tokens without approving themselves first.
  • A spender is limited by the owner's balance even when the allowance is larger.
  • An allowance of max−1 still goes down when spent, while an unlimited one never does.
  • A spender can't use one owner's approval to move another owner's tokens.
  • Allowance-change functions, permit and recovery functions don't exist.
• Fuzz: any call to a function the token doesn't have reverts without changing anything. A stranger can't move any amount without an allowance, and a transfer between two people touches no one else. Splitting a transferFrom in two gives the same result as doing it at once, and sending tokens away and back restores both balances.

test/Yolo.openInvariant.t.sol (random call sequences: 256 runs × 64 calls):

• Unlike the existing four-holder invariant suite, recipients and spenders here can be any address, including the zero address. The deployer starts with most of the supply.
• It deliberately makes calls that must fail: sending to the zero address, approving the zero address, sending from the zero address, overspending by one wei, and spending without approval.
• What it checks after every call:
  • The total supply never changes.
  • Every address that has held tokens matches a separate record kept by the test, and those balances add up to the whole supply.
  • Every allowance matches the record.
  • Every call succeeded or failed exactly as the token's rules say it should.
• A final check confirms each run produced both successful and rejected calls, so the checks can't pass without testing anything.
• Run counts are set inside the test file, so foundry.toml is unchanged.

Only these two files under test/ are new. Nothing is committed.

The findings file is valid, the quoted snippet matches line 43 exactly, and the tree is unchanged apart from the findings file, which git ignores.

Outcome: the Yolo token has no code defect. One low finding is kept, from the permissions specialist, and it reproduced exactly. The file .imd-findings.json holds it plus a coverage record answering all three entry points.

What I verified against the code

• The token is OpenZeppelin v5.0.2 ERC20 with a no-argument constructor that mints exactly 10^27 units to msg.sender once. The ABI exposes no mint, burn, owner, pause, blacklist or upgrade function.
• Each entry point traced through the vendored ERC20: zero-address and balance checks precede the unchecked arithmetic, failures revert atomically, no external calls or callbacks exist. All three are marked holds.
• Creation code is 2,633 bytes and runtime 1,752 bytes. An opcode scan finds no DELEGATECALL, CALLCODE or SELFDESTRUCT, so the launch's CREATE2 deployment and the protected floor checks are satisfied.
• The manifest matches the code: empty constructorArgs, supply and decimals agree, lowercase addresses, schema keys only.
• The project's full suite of 52 tests passes with the documented seed, and forge fmt is clean.

The kept finding, low severity

Seven vendored forge-std files do not hash to the digests in dependencies.lock.json, while the README claims every vendored file is unmodified upstream. I fetched the seven files from the pinned upstream commit. Their bytes hash to the lock file's digests exactly, and they are identical to the vendored copies once all whitespace is stripped. So the vendored tree was reformatted after the lock was written. No production bytecode is affected, since the token imports only the OpenZeppelin files, which match byte for byte. The fix is either to restore the upstream bytes or to regenerate those seven digests and drop the "unmodified" wording.

Not run: the protected launch tests, which import v4-core and the service's floor sources that are not in this tree. I checked each of their assertions by hand instead: supply, decimals, exact transfers, absent privileged selectors, and the opcode scan.