Completed SCToken, launch.json, and the Foundry project. forge build and forge test pass: 23 tests, including offline Uniswap v4 integration.

Created five 1024×1024 logos with OpenAI image generation. Five drafts drawn; all retained, none discarded. Option 2 is saved as artifacts/logo.png after checking its 32-pixel circular appearance.

Descriptions are in logos/README.md; prompts and selection notes are in logos/GENERATION.md.

The deliverable is complete and verified. The earlier contributors had already built the token, config, manifest, and tests, so my work was verification plus documentation repair.

What is in place

• Contract src/SCToken.sol is a fixed-supply OpenZeppelin ERC-20. It mints the full 1e27 units to the deployer, charges a constant 2% on transfers from the Uniswap v4 PoolManager to the constant creator wallet, and exempts transfers to the PoolManager and wallet-to-wallet transfers. It has no owner, admin, mint, burn, proxy, delegatecall, or selfdestruct.
• Config foundry.toml pins solc 0.8.26, Cancun, optimizer on, and no bytecode hash. All dependencies are vendored as plain files under lib/.
• Manifest launch.json carries exactly the required top-level keys, the IMD pair, fee 12500, tick spacing 60, the provenance initial price, and the economics block from the brief.
• Tests cover deployment supply, untaxed wallet transfers, taxed buys with gross and net accounting, untaxed sells and pool seeds, rounding, allowances, revert paths, absent admin entry points, forbidden opcodes, and a local Uniswap v4 PoolManager seed plus buy and sell round trip in both currency orders.

Checks run

What I changed

• README.md now has a deployment-parameters table and an assumptions and operational-responsibilities section, as the acceptance criteria require.
• README.md, logos/README.md, and logos/GENERATION.md no longer point to a nonexistent artifacts/logo.png file. They now name logos/logo-2.png as the recommended mark.

Open items for the launch

• No live-mainnet fork test ran, since this environment has no network. The v4 integration coverage is offline against the vendored PoolManager at its canonical address.
• The creator wallet is a compile-time constant. The requester must control its key, because the contract cannot redirect tax.
• Tests passing is not an audit. An independent adversarial review before release remains the launch policy's responsibility.

Done. The suite builds and passes, and I found no defect in SCToken to report.

What was already there. Earlier contributors delivered 23 passing tests: unit coverage of the tax paths, three fuzz tests, a transfer invariant, and a buy/sell round trip through the real vendored Uniswap v4 PoolManager at its mainnet address. I built on that rather than rewriting it.

What I added, two new files under test/:

• test/SCToken.edges.t.sol (21 tests). Supply goes to whoever deploys, including a CREATE2 factory probe like the protected harness. The tax recipient and manager addresses are literally compiled into the runtime. No receive or fallback, no ether accepted, and 14 more tax-setter, rescue, permit and allowance-helper selectors are absent from three callers. Exact Transfer event counts and order on taxed, dust and untaxed paths. Delegated manager self-transfer, the creator wallet buying and selling, strangers pulling from the manager, zero-address approve and transfer reverts. Six fuzz tests over random counterparty addresses: wallet transfers never taxed, sells arrive whole, buys pay floor of 2%, cumulative tax equals the sum of per-buy floors, the manager cannot overspend, and repeated round trips lose exactly the tax.
• test/V4ProtocolFees.t.sol (9 tests plus one invariant). The real PoolManager with the 1.25% LP fee and the maximum protocol fee in both directions. Exact-input and exact-output buys, a 49-unit dust buy paying no tax, sells settling exactly with SC protocol fees accruing, protocol fee collection and liquidity removal as taxed outflows, donation as an untaxed inflow, and five consecutive full sell-backs. The invariant runs random real buys and sells and checks supply, conservation across all holders, creator balance equal to the tracked tax, manager balance equal to seed minus gross out plus sold in, and that the manager always holds its accrued SC fees.

Verification. All 54 tests pass across five fuzz seeds. A scratch mutant token with a 3% rate and a taxed sell path failed 13 of the new unit tests, and its pool seed failed with "PoolManager input arrived short", so the tests do discriminate.

Findings file. .imd-findings.json holds two info-level notes, no defects: every PoolManager outflow is taxed, so protocol fee collection in SC and liquidity removal deliver 98%, and per-transfer rounding means outflows under 50 minor units pay nothing. Both follow from spec M1 and are asserted as specified behaviour.

Still owed: a fork run against live mainnet state, which this environment has no network for.

The manifest is done. Only launch.json changed, and the build and full suite pass.

What launch.json describes

• Token: contract SCToken, name SwarmCity, symbol SC, decimals 18, empty constructorArgs, totalSupply of 1e27 minor units. The build artifact's ABI confirms the constructor takes no inputs, and the source mints that exact amount to msg.sender.
• Contracts: empty. SCToken is the only contract in src/.
• Pool: pairedCurrency is the IMD address in lowercase, fee 12500, tickSpacing 60, initialPrice "125270724187523965593206900" as the task specifies.
• Economics: copied verbatim from the job.
• Notes: one string, 1223 characters. It now states the zero-argument constructor, the absence of application contracts, the exact tax flow the source implements, and that initialPrice is provenance only.

What I changed

The manifest from earlier accepted work already matched the token in every field. I rewrote only the notes string so the manifest fully describes the accepted implementation on its own. Every other key is byte-identical. No other file was touched.

Verification

• A script checked the exact top-level keys, token keys, pool keys, economics key order and values, lowercase addresses, integer types for fee, tickSpacing and decimals, and the contract name pattern.
• forge build --offline compiled cleanly with solc 0.8.26.
• forge test --offline passed all 54 tests, including the stateful invariant and the local Uniswap v4 PoolManager settlement suite.

Still owed and out of scope here: the network-supplied protected harness and the live-mainnet fork runs, which this offline environment cannot execute.

I found no permission defects in the token I could reproduce, so .imd-findings.json has an empty findings list plus a coverage record. No other files were changed.

Coverage (all three entry points: holds)

• SCToken.approve: this is the standard OpenZeppelin v5 version, unmodified. A caller can only set their own allowance, and nothing privileged can be reached through it.
• SCToken.transfer: the tax applies only when the sender is the PoolManager and the recipient is not. It takes value / 50, which is exactly 2% rounded down, and sends it to the fixed tax wallet. The PoolManager loses the full amount and the buyer gets the rest, so v4 settlement still balances. Sells, the pool seed and wallet-to-wallet transfers are not taxed, and the total supply never changes.
• SCToken.transferFrom: it checks the allowance, then follows the same tax rule. No one can move another holder's tokens without an allowance from that holder. The PoolManager never grants an allowance, so no one can move its tokens through transferFrom.

Invariants I checked

• No admin powers: there is no owner, admin, mint, pause, blacklist or upgrade function. The tax rate, tax wallet and PoolManager address are compile-time constants, and there is no delegatecall or selfdestruct.
• Supply: the constructor takes no arguments and mints exactly 1e27 units (1,000,000,000 tokens) to the deployer, without subtracting the swarm's 10%.
• Manifest: launch.json has exactly the required keys and an empty constructorArgs, matching the constructor. Its addresses are lowercase, and the economics block is copied exactly from the job.

Checks: forge test passed all 54 existing tests, including the v4 settlement and swap-accounting tests. I didn't write any extra proof tests. I looked at the aderyn note about large number literals and it isn't a defect.

Not a defect: a buyer who keeps a swap's output as a v4 balance claim (ERC-6909) and doesn't withdraw it pays no tax until they withdraw. This is how the spec works, since the tax applies only to transfers out of the PoolManager. People removing liquidity are taxed 2% for the same reason.

I found no defects I could reproduce in the token's economics, so .imd-findings.json has an empty findings list plus coverage rows. Every entry point is marked holds. I changed no other files, and the existing suite passes (54 tests, including the supply invariant).

What I checked in src/SCToken.sol (the custom _update):

• Buys: a transfer from the PoolManager to anyone else takes the full amount out of the PoolManager, sends 2% (the amount ÷ 50, rounded down) to the fixed wallet 0xD30e…2951, and the buyer gets the rest. That matches M1.
• Sells and the pool seed: transfers to the PoolManager are never taxed, so the PoolManager is credited exactly what was sent and Uniswap v4 settlement balances.
• Wallet-to-wallet and distributor claims: no tax, so the swarm's 10% arrives in full.
• Supply: the constructor mints the whole 1e27 units once to the deployer. There is no other mint path, no owner, no admin function, and no delegatecall or selfdestruct.
• transferFrom and approve: these are the standard OpenZeppelin functions. transferFrom runs the same tax logic, with no way around the tax and no double tax.
• launch.json: it has exactly the required keys and copies the economics from the job verbatim. The opening price is consistent: the square root of (2500e18 / 1e27) × 2^96 gives exactly 125270724187523965593206900.

Not raised as findings, because they follow the spec:

• A buy of under 50 units (minor units, at 18 decimals) pays no tax because of rounding down. Splitting a buy that small to dodge the tax costs far more in gas than it saves.
• Anything else that pulls tokens out of the PoolManager also pays the 2%: removing liquidity, a flash-accounting take, or claiming fees. That follows directly from "every transfer from the PoolManager is taxed."
• On an exact-output buy, the buyer receives 2% less than the amount the router checks, since the router looks at the pool's figure rather than what arrives in the wallet.

Static analysis flagged only one thing: the large number literals on line 10. That is the supply constant written out in full and is not a problem.

All three snippets match the tree at their cited lines, the working tree shows no tracked-file changes (the findings file and scratch test are gitignored), and the review is complete.

Result: one medium and two info findings in .imd-findings.json, with coverage rows for all three ABI entry points plus four invariant and manifest rows.

• Medium, tax bypass at the v4 boundary. The 2% fires only when the PoolManager makes an ERC-20 transfer out. A buyer who settles the SC delta as ERC-6909 claims via mint, or who buys and sells inside one unlock so the SC delta nets to zero, never triggers that transfer. I reproduced both offline against the vendored PoolManager at its mainnet address: a buy of about 3,927 SC paid zero tax each way. The token meets the literal M1 wording, so this is a scope decision for the requester, and nothing inside the token can close it. A v4 hook would be needed.
• Info, round-down fee. The division by 50 is exactly floor(2%) for every value, has no intermediate overflow, and under-collects at most 49 wei per transfer. The README documents it. No compounding, not farmable at gas cost.
• Info, error arguments. When the manager's balance lies between the tax and the gross amount, the revert reports post-tax figures. State is fully rolled back, so this is cosmetic.

What held: supply conservation, the tax identity, allowance handling in transferFrom, the manifest keys and derived sqrt price (matches to the digit), and the pinned build settings. The existing 54-test suite passes offline.

Not reached: no live-mainnet fork run against the deployed PoolManager, and no check of routers outside v4-core, so which production routers settle buys as claims remains an open question for the judge.

Review complete. The findings file is written at .imd-findings.json and nothing else in the tree changed (test/scratch is gitignored).

Outcome. SCToken has no critical, high or medium defect in the Execution Trace, Periphery and First Principles areas. The build is clean, all 54 project tests pass, and the five vendored OpenZeppelin files hash identically to upstream v5.0.2. I recorded two low findings, each with a reproduction I ran.

• Low: creator tax is avoidable through ERC-6909 claims. A trader can keep swap output inside the PoolManager with mint, move the claims to other wallets, and sell later with burn. No SC transfer ever leaves the manager, so the tax branch never fires. My scratch test does a full buy, claim transfer and sell through the real vendored PoolManager, and the creator wallet ends at zero. This matches the literal wording of spec M1 but defeats "2% of every buy", and no token-side fix exists, so it is flagged as a design decision for the requester.
• Low: wrong revert values on an oversized taxed transfer. The tax leg runs before the gross balance check, so a 100e18 transfer from a manager holding 99e18 reverts with balance 97e18 and needed 98e18 instead of 99e18 and 100e18. The attached proof test fails on the current code. The existing suite asserts the wrong numbers, so a fix must update that expectation too.

Coverage. All three entry points have rows. approve holds. transfer and transferFrom carry finding 2. Ten further rows cover the invariants I traced: fixed mint, untaxed inflows, v4 settlement solvency after taxed take, floor rounding, forbidden opcodes, manifest shape and price, and the documented 2% on liquidity removal and protocol fee collection, which is per spec and noted as a trust assumption. One row is unreached: the factory's seed code is not in this tree, so I could not confirm it never takes SC back from the manager during seeding.

Review complete. The findings file is written at the repository root and the scratch tests are removed.

Outcome

• .imd-findings.json holds 2 findings and 8 coverage rows (all 3 entry points answered plus 5 invariants).
• The existing suite passes: 54 tests across 6 files, offline.
• No file in the tree was changed.

Findings kept

1. Low, with proof. A taxed transfer from the PoolManager that exceeds its balance reverts with ERC20InsufficientBalance carrying the post-tax balance and amount (97e18, 98e18) instead of the ERC-6093 figures (99e18, 100e18). Merged from audit_math and audit_flow. The specialist's proof fails on this tree for exactly that reason, so I attached it. Atomicity holds, so no funds impact. The project's own test asserts the wrong numbers and would need updating with the fix.
2. Info. Buys settled as ERC-6909 claims, or netted inside a single unlock, pay no creator tax. I reproduced both paths against the vendored PoolManager at its mainnet address. Recalibrated down from the specialists' medium/low because the authoritative spec M1 defines a buy as a transfer FROM the PoolManager, which is exactly what the token taxes, and no ERC-20 can observe claim mints or in-flight deltas. It is a documentation point: the README sentence that every buyer receives 98% of quoted output is not true for claims-settled buyers.

Dropped

• audit_math's round-down note: intended and documented behaviour, not a defect.

My own pass found nothing further. The constructor mints exactly 1e27 to msg.sender with no arguments, the ABI contains only ERC-20 plus four constant getters, the runtime has no DELEGATECALL, CALLCODE or SELFDESTRUCT, launch.json has exactly the required keys with lowercase addresses and verbatim economics, and the vendored libraries are 87 ordinary tracked files with no submodule. Launch flows, v4 settlement, protocol fee collection and liquidity removal all behave as M1 states.