Implemented Taxi with the fixed 100 million supply, 18 decimals, permanent 1% treasury fee, required exemptions, and no owner or configuration setters.

• forge build, forge test, and forge fmt --check pass.
• 36 tests pass, including 4,000 fuzz cases.
• Dependencies are vendored for offline builds.
• Deployment parameters and responsibilities are documented in README.md.

The protected launch harness requires external launch context and was not run locally.

Done. The manifest is written and verified; nothing else in the tree was touched.

What I wrote at launch.json in the repo root:

• kind custom_token, token contract Taxi, name Taxi, symbol TAXI, 18 decimals.

• constructorArgs ["$factory", "$poolManager", "$launchNumber"], matching the accepted constructor (address factory_, address poolManager_, uint64 launchNumber_) in src/Taxi.sol.

• totalSupply is the constructor's single mint to msg.sender, in minor units:

  100000000000000000000000000

• contracts is empty. The accepted tree has only the token and its ILaunchFactory interface, so there are no application contracts to name.

• pool pairs with native ETH (zero address), fee 3000, tickSpacing 60. initialPrice is the sqrtPriceX96 derived from the 20 ETH cap over the full supply, which is provenance only.

• economics is the job's object copied verbatim.

• notes describe the 1% treasury fee, the factory, pool manager and distributor exemptions, the absence of any owner or setter, and the build settings. They are well under the 4000-character limit.

Checks run

The stray dotfiles shown as untracked by git are the sandbox's device-node placeholders, not files I created.

Recorded no substantiated defects and coverage for all three entry points in .imd-findings.json.

All 36 local Foundry tests passed. Protected launch integration remains unverified because required sources and dependencies are absent. No contract or configuration files changed.

Saved .imd-findings.json with no substantiated defects and coverage for all three entry points.

All 36 local tests passed. Production registry behavior and full protected launch integration remain unverified because required implementations and inputs are absent. No source or configuration files changed.

The review is complete. The findings file is in place and the full suite still passes with my scratch tests included.

Outcome: no defects found in the assigned area. The fee arithmetic in src/Taxi.sol holds at every boundary the Math Precision, Boundary and Numerical Gap guides name, so .imd-findings.json carries an empty findings list and eight coverage rows, one per entry point plus invariants and both aderyn leads.

What I verified, with tests run under test/scratch/:

• Fee rounding. The fee is floor(amount / 100), zero below 100 base units. Checked at 0, 1, 99, 100, 101, 199, 200, 10,000, the whole 1e26 supply, and max-uint. Max-uint reverts cleanly with the gross balance error. The worst avoidable fee per transfer is 99 base units, which is dust and documented in the README.
• No underflow in the two-step update. The gross balance check runs before either internal transfer, so the second transfer of amount minus fee can never fail, including when the sender is the treasury or sends to itself.
• Supply conservation. The fee is a transfer, not a burn. The sum of balances equals total supply across 1,000 fuzzed three-hop sequences through the treasury.
• Registry boundary. The distributor lookup is a 30,000-gas staticcall accepting exactly 32 return bytes. No code, revert, short or long return data, infinite loops, state writes, and a non-canonical address word all resolve to no exemption without reverting. A gas-limit sweep from 1,000 to 120,000 on a distributor claim never produced a call that succeeded while being taxed.
• Vendored dependency. The OpenZeppelin files match the listed sha256 hashes and are byte-identical to upstream v5.0.2 at the stated commit.

Two things worth noting for the author, neither a defect. A registry whose lookup costs more than 30,000 gas makes claims taxed rather than reverting, which the README already states as a factory trust assumption. The FEE_BPS constant is declared but unused, since the fee uses a literal divisor of 100. Both compute the same 1% for every input, so there is no failing case, but a future edit to the constant would silently do nothing.

Nothing was left unreached. The only external dependency I could not inspect is the live factory's distributorOf return shape, since no network file or factory ABI was supplied. The protected harness uses a public mapping returning one address, which the token handles correctly.

The review is complete: one medium finding, written to .imd-findings.json in the repository root along with the coverage record. No tracked file was changed.

Finding

Medium — the 1% fee is avoidable on any transfer (src/Taxi.sol:72). Because any transfer to or from the pool manager is exempt, a holder can send tokens to another wallet through the Uniswap v4 PoolManager and pay nothing to the treasury.

• Relay path: an unprivileged helper deposits into the manager and pays the recipient out again (sync, transferFrom to the manager, settle, take), with no pool or swap involved. Sending 1,000,000 TAXI this way delivered 1,000,000 to the recipient and 0 to the treasury; the direct transfer delivered 990,000 and 10,000.
• Claim-token path: the same deposit can be minted as the manager's ERC-6909 claim, which changes hands without the token's fee logic running and is redeemed whole.
• Who loses: only the treasury, 1% of every transfer whose sender uses the relay. No holder loses funds.
• Fix needs a scope decision: the two-way pool manager exemption is what the brief asks for and what the launch flows need, so I see no fix inside Taxi.sol that keeps the agreed design. The in-scope remedy is correcting README lines 25–27, which say intermediate wallet transfers are taxed.

I reproduced this against the real v4-core PoolManager (commit 46c6834, copied into test/scratch/ and compiled with --via-ir), and separately against a minimal stand-in. I believe the already-deployed Universal Router can do the same without a helper, but I did not run that.

There is no Foundry proof attached: one is only required for critical or high, and a test that must pass "once fixed" would bind the author to a design change.

Coverage

• transfer, transferFrom: marked finding (ref 1). Their balance checks, fee split, allowance handling and revert paths otherwise behave as written.
• approve: holds. It is unmodified OpenZeppelin v5.0.2, and the vendored files match their recorded checksums.
• Supply conservation and exact debit: hold. The sender is debited exactly the amount, including the self-transfer and treasury aliases.
• Fee rounding: holds. The sub-100-base-unit zero fee is documented and worth under 1e-16 TAXI per transfer, so I did not report it.
• Distributor claim under low gas: holds. A gas-starved registry lookup cannot turn a claim into a taxed one; it reverts instead (swept 5,000–120,000 gas, zero taxed claims).
• Registry dependency: holds. Every failure mode falls back to taxed transfers rather than freezing them.
• Launch flows: hold by reading against the protected harness.

Not done

• The protected harness was not run; it needs the network's factory-side sources and environment, which are not in this tree.
• The real factory's distributorOf gas cost could not be checked. The low-gas result assumes it stays under the 30,000-gas cap.
• Areas outside economics, invariants and flow gaps were only looked at where they touched the fee path.

The existing suite passes (36/36). test/scratch/ was removed after use.

Added failure-path tests, fuzz properties, and three invariants covering supply, balances, allowances, and configuration. All changes are under test/.

Offline verification passed: forge build and forge test—49 tests passed, including 16,384 randomized invariant calls. No confirmed defects found.

Protected Uniswap integration remains unverified locally because its launch dependencies and environment are absent.

Review complete. The findings file is written and validated, and the scratch test was removed, so the tree holds only .imd-findings.json as new content.

Outcome: one finding kept, at medium severity. The three entry points are all covered, two of them pointing at that finding.

What I verified

• The project builds cleanly on solc 0.8.26 and all 49 existing tests pass, including the 256-run invariant suite.
• The economics specialist's finding reproduces. I wrote a scratch test with a stand-in that performs the same ERC-20 calls the Uniswap v4 PoolManager makes under unlock. A direct 1,000,000 TAXI transfer paid 10,000 TAXI to the treasury. The same transfer relayed through the pool manager paid nothing, because both legs match the exemption at src/Taxi.sol:72.
• The specialist's two variants, sync/settle/take and ERC-6909 claims, share one root cause, so they are merged into a single finding.
• The permissions, math, flow and test specialists reported nothing, and my own pass agreed. Supply, allowance handling, fee rounding, treasury and self-transfer aliases, the bounded registry lookup, and every launch flow leg behave as specified. The static-analysis lines are style notes only.

Severity and scope note: no holder loses funds and supply is fixed, but the token's single stated economic rule is enforceable only for senders who volunteer it. The exemption is exactly what the brief asks for and what the launch floor requires, so I flagged this as a scope decision for the requester rather than a silent code change. The finding carries no proof file since it is below high severity.

Reproduced the bypass with model tests. Updated README to document fee avoidance and unreliable treasury revenue.

Recorded disputed in .imd-responses.json: preventing the bypass conflicts with the required exemptions. Production contracts remain unchanged.

Validation passed: forge build, all 39 tests, and forge fmt --check.

Updated only launch.json. Revised notes remove swarm allocation text and document the pool-manager fee bypass. Preserved constructor arguments, supply, economics, and pool settings.

Validation passed: supplied schema checks, constructor ABI comparison, forge build, and all 39 local tests.

bundle upload failed: fetch failed

The revision is committed and the tree is clean. The full suite passes from a clean, offline build with no environment variables, exactly as the verifier runs it.

What changed

The earlier rejection was an upload failure, not a content one, so I rebuilt the revision as an extension of the accepted suite rather than a rewrite. The accepted files are untouched. Two new test files and a notes update were added under test/.

• Registry budget and malformed lookups in test/TaxiRegistryBoundary.t.sol. A registry that answers with the gas it received shows the lookup stipend is at most 30,000 and is not raised by the caller. Registries demanding just under the budget are honored, and ones demanding it or more are treated as absent, so a claim through an over-budget registry arrives taxed rather than reverting. The decoder is fed a revert carrying a well-formed address, two-word and 33-byte answers, the value one above the address width, a zero word, and the widest canonical address. A registry that reads the token during lookup is honored, one that tries to write is absorbed and moves nothing, and one that re-enters the lookup recursively is bounded by the budget and never freezes a transfer.
• Single-transfer properties in test/TaxiTransferProperties.t.sol. For any pair of the seven endpoints, the Transfer events are the oracle: a fee event comes first and only when due, replaying the events on a snapshot reproduces every balance, and no bystander balance or unspent allowance moves. Gas-starved transfers are all-or-nothing, pinned at 25,000 gas (reverts whole) and 120,000 gas (exemption applied whole).
• test/TAXI_TESTS.md documents both files and notes the two catalogue properties the specification deliberately breaks: a taxable self-transfer costs the fee, and the treasury is not exempt.

Results

Findings

No new defect was found, so no .imd-findings.json was written. The one harness failure during development was my own expected-allowance mistake for a self-transfer, grounded and fixed before trusting it. The known fee-avoidance route through the exempt pool manager remains documented in the README and covered by the accepted relay tests from the earlier round.

The findings file is in place at the repository root and the environment excludes it from git by design. The review is complete.

Outcome: the one outstanding finding is settled, and no new defects were found. The file .imd-findings.json holds an empty findings list and six coverage rows.

Round 1 finding, fee avoidable through the exempt pool manager. The behaviour still exists. I re-ran the author's relay test and all three cases pass: relaying 1,000,000 TAXI through the manager delivers the full amount with the treasury unchanged. The source is byte-identical to the version I reviewed, which is the correct outcome. The brief requires every transfer from or to the pool manager to be exempt, and the launch floor's seed and swaps settle through exactly those legs. My round 1 remedy was a scope decision for the requester, either document the limitation or change the economics. The author chose to document it. The README no longer claims intermediate wallet routes are taxed, the new section describes both the sync/settle/take and ERC-6909 claim routes, and the manifest notes carry the same disclosure. The code implements the requested rule as specified, so there is no code defect to reopen. I dropped it rather than restating it.

Fresh read of the code. All three entry points hold. Approve is unmodified OpenZeppelin. Transfer and transferFrom share one update path: gross balance required, amounts under 100 base units or exempt endpoints move whole, otherwise 1% to the treasury and the rest to the recipient. The only mint is in the constructor. The full suite of 63 tests, including the fuzz and invariant runs, passes.

One row marked unreached. The protected launch-flow harness imports v4-core and factory-side sources that are not in this tree, so I could not execute it. I traced the launch legs in source instead and each takes the exempt path.