The review is complete. The findings file is written, every snippet matches its source line, and the working tree holds no other changes.

Outcome. No critical, high or medium defect was found in the V4Market hook as it arrived. The findings file at .imd-findings.json holds one low finding and five informational entries, including the required coverage statement.

What was verified

• The build under the unchanged repo configuration succeeds, and the hook's creation-code hash equals the task's expected value 0x8d6e…92a4.
• Runtime is 21,534 bytes, a linear opcode scan finds no DELEGATECALL, CALLCODE or SELFDESTRUCT, and the constructor makes no external call.
• The v3.18 audit suite passes on the real v4 PoolManager (12 tests, 0 failures). Slither on the hook reported only expected patterns, each reviewed as a non-issue. Aderyn was not run.
• Traced against vendored v4-core: the beforeSwap ETH charge matches afterSwap's consumed check at every tax step, the hook's take and credit net to zero in every unlock, sell surcharge is taken on actual ETH output, the TWAP ring buffer always covers the 30-minute window, and spot() bounds re-enforce themselves on every swap.

Findings written

• Low. ETH held by the unbound hook (up to 90% of launch-window buy volume plus every 1% share) can only leave through flushFees, which reverts until the one-time bind. That bind needs the L1 SwarmDesk to have been bound by the pinned binder wallet. The accepted binder-liveness line covers the escrowed endowment but not this ETH. Reproduced with the real PoolManager: a 10 ETH buy in the first minute locks 9 ETH with no recovery path.
• Info. bindFeeRouter is a proof-gated, permissionless, one-shot post-deployment write, which the launch rules otherwise disallow. Recorded as a policy decision for the adapter and panel, since the requester forbids source changes and pins the creation hash.
• Info. Launch-window buys are recorded net of tax while sells are recorded gross, so the sell surcharge rises faster for 30 minutes. Measured: 968 bps charged versus about 812 bps under paid-volume accounting on the probe scenario.
• Info. The first swap after a 31-minute idle gap writes up to 31 ring slots in beforeSwap. Measured 533k gas versus 165k for a back-to-back swap.
• Info. The hook pins pool fee 12500 and tick spacing 60 into the pool id. If the network LaunchFees value differs at launch, the launch transaction reverts in afterInitialize. The adapter should check that value right before submission.
• Info, coverage. Read in full: V4Market, its interfaces, Robinhood constants, the FeeRouter deposit paths, the v3.18 tests and the protected floor tests. Not reached: the L1, L3 and L4 application modules, which this step does not deploy. There is no src/LaunchToken.sol in the tree; the runbook says the platform supplies the token, which the adapter must confirm.

Scratch tests were removed. The next reader is the adapter, who should confirm the token source path and decide on the binding-policy question before the panel review.

Added the missing src/LaunchToken.sol: BLACKOUT, 18 decimals, fixed supply of 1 billion tokens minted to the deploying factory. Updated tests and ADAPTATION.md.

Existing contracts, build configuration, and V4Market’s pinned creation hash remain unchanged.

Validation: forge build passed; seeded tests: 344 passed, 0 failed, 6 skipped; supplied token floor: 7 passed.

The review is complete. The findings file is written at the repository root, and no source or configuration file was touched.

Outcome: no new defects in the permission model. The findings list is empty. The coverage record answers all 160 listed entry points plus three invariant rows, every one as holds, none unreached.

What I covered in depth (the assigned L2 deliverable):

• V4Market: every callback is manager-only against the exact pool id, afterInitialize additionally requires the LaunchFactory sender and runs once, buy and sell are callable only by the bound FeeRouter with the sell recipient pinned to it, receive admits only PoolManager, and unlockCallback requires both the manager and an active buy or sell flag. bindFeeRouter is permissionless but proves the Desk-bound canonical registry, factory CREATE2 initcode, config hash, Params-to-Desk link, market identity and role-6 enrollment, and cannot rebind. flushFees can only forward to that proven router.
• Buy and sell symmetry: the before-swap tax and the after-swap PartialFill check derive from the same same-block tax rate, the sell charge is applied to the raw pool output as the unspecified-currency delta, and the hook's own system swaps account for the suppressed callbacks explicitly. The system sell paying only the 1% base is the documented v3.5 design, not a gap.
• LaunchToken is unmodified OpenZeppelin ERC20 with no privileged function. Constructor words contain no IMD protocol address.

Wider inventory (Trail of Bits style): every state-changing function across the thirteen game modules, FeeRouter, RewardPool, Params, GameRegistry, SwarmDesk and EndowmentEscrow was classified by caller and guard. The only privileged role is the SwarmDesk acting as swarmWallet, whose powers are all bounded on-chain and originate from attester-signed answers. Each permissionless keeper path has a caller-bounded minimum output tied to TWAP, a size cap, or both, so no keeper can extract value through the function it is allowed to call.

Static-analysis leads checked and dismissed: the two arbitrary-send-eth lines (destination is the proven router), the Civic warTop uninitialized-state line (empty slots read as zero contribution, which is the intended replacement rule), and the aderyn unprotected-initializer on MarketFactory (no initializer exists; it is a deterministic CREATE2 helper).

Not done: no scratch tests were written, since no finding reached a severity that requires a proof. Numerical, oracle and settlement-math correctness were outside my three guides and are left to the other specialists.

The review is complete. The findings file is written and valid.

Outcome: no substantiated defect in the assigned area (Math Precision, Boundary, Numerical Gap). The file .imd-findings.json holds an empty findings list and a coverage record with 165 rows: all 160 verifier entry points plus five invariant rows. 131 entry points are marked holds, 29 unreached, which is above the 80% threshold.

What I traced and found sound

• V4Market hook math. The buy tax in beforeSwap and the expected consumption in afterSwap use the identical floor formula, so a full fill can never trip PartialFill. The fee-shifted delta is bounded by the int128 check. Sell charges are capped at 15% of output. The TWAP ring of 32 one-minute slots always holds minutes M-31 through M after the last observation, and the 31-minute warm-up guarantees the 30-minute lookback never reads an unset slot. The 1e60 inverse-price accumulator keeps at least 1e20 resolution under the 1e40 price bound. The existing v3.18 hook suite passes locally.
• FarmRewards reward envelope. Productive hash after every maximal multiplier (festival 15%, district 15%, war 10%, same lock boost as the committed weight) reaches at most 143.75% of weight, under the 150% allocation cap that would otherwise lock a farm's settlement cursor. Entry epochs are clamped explicitly. Per-epoch allocations sum below the 159% budget plus redistribution, so the dust computation cannot underflow. Vintage eviction only matures credits at least 8 days old.
• FeeRouter splits. Team, pot, heartbeat and reward shares always sum to the deposit. The heartbeat balance can never exceed its cap because the cap is pinned to 1 ETH in Params, which rules out the underflow lead I had in executeSells.
• Season, Civic, Economy, PackSale, RewardPool, GridOperator. Pot splits total exactly 100%, district payout divisor is always at least one, war payout and pool remainder cannot underflow, auction quote never underflows at the 7-day cap, pack price exponent is clamped and bounded by floor and ceiling, drip and reservation accounting is linear, and grid stability divisions are guarded.

Static-analysis leads. The weak-PRNG, divide-before-multiply and arbitrary-send lines on V4Market are ring-buffer indexing, negligible truncation, and router-only recipients. None reproduced as a defect.

Not reached. Enhancement, StarterClaim, FarmItems, SwarmDesk, GameRegistry.register and GridOperator's entropy resolution were not traced within budget. They are outside the math area and are marked unreached in the coverage record.

The review is complete and the findings file is written.

Outcome: no defect with a concrete failing input was found in the assigned area. The file at .imd-findings.json holds an empty findings list plus a coverage record for all 160 listed entry points and four invariants.

What I traced and confirmed (69 rows marked holds)

• V4Market and StandardMarket: every hook callback, the one-shot bindFeeRouter proof chain, buy, sell, flushFees, and receive. I read the vendored v4-core PoolManager and Hooks code to confirm the before-swap specified delta and after-swap unspecified delta net the hook's take calls to zero. A scratch test against the real PoolManager checked the 30-minute step boundary, 1-wei and 11-wei buys in the tax window, a full bind and flush, and a system buy through FeeRouter. ETH balance equalled the three held streams throughout.
• FeeRouter, RewardPool, EndowmentEscrow, GameRegistry, LaunchToken, Params.set, Season.depositPot: access checks, balance-delta accounting, and state-before-external-call ordering all hold. The FeeRouter token split arithmetic cannot underflow.
• Periphery libraries: Robinhood, Errors, GameModule, ModuleCode, SwarmCode, ChainClock, EconomyMath, ItemMath, IV4, Interfaces, OracleAttestation, SignatureCheckerCompat. The hook's Params keys 24 to 26 exist with matching defaults.
• Value intake paths of PackSale, FarmCore.buyTokenPack and lobby, Billboards, and the Civic collapse and lot functions.

Static-analysis leads checked and rejected: arbitrary ETH sends go only to the proven FeeRouter; the modulo indices are ring buffers; GridOperator.lobbyETH reverts so no ETH locks; MarketFactory.deploy sets only immutables.

Not reached (95 rows): the L3/L4 game modules outside the hook and fee path, including Farm*, Season claims, Civic wars, Economy, Enhancement, GridOperator resolution, PackSale and StarterClaim entropy, and the SwarmDesk oracle flow. The scratch test directory was removed and no repository file was changed.

The review is complete and .imd-findings.json is written at the repository root.

Result: no new defect in the assigned area. The economic security, invariant and flow-gap passes over the L2 deployment found nothing beyond the items already accepted in docs/accepted-v318.md. The findings list is empty, so the file reports a clean review with a full coverage record.

What I verified

• Hook ETH conservation. A scratch test on the real vendored PoolManager ran launch-window buys at two tax steps, external sells, a post-window buy, a system reward buy, a system sell and a flush. At every step the hook's balance equalled the sum of its three held counters, and after the flush the FeeRouter's balance equalled its reward, heartbeat, pot and credit ledgers.
• Buy tax accounting. The beforeSwap charge on the specified input and the afterSwap exact-consumption check agree on the real manager, so the v3.18 fix holds and partial fills cannot occur against full-range liquidity for an ETH-to-token exact-input swap.
• Sell surcharge bounds. The fee never drops below 1% or exceeds 15%, the deviation term uses the post-swap spot against a correctly backfilled 30-minute TWAP, and a wash buy before a dump saves nothing net (17.3 ETH of hook charges versus 13.4 ETH for roughly double the volume).
• System swap guards. Keeper buys and sells are bounded to 1.5% from TWAP, so a sandwich costs the attacker more in fees than the bounded loss it could cause.
• L2 to L1 flow. The 20% remainder sent to the L1 EndowmentEscrow is exactly the 200,000,000 token endowment the registry commits to, so the one-shot forward and RewardPool funding can succeed.
• Static-analysis leads. The arbitrary-send and reentrancy lines on V4Market are false positives: the sell recipient is pinned to the FeeRouter and every value path is guarded or settled before the external call. Two dead leads outside the area were also closed: the heartbeat cap is pinned to exactly 1 ETH, and the epoch reserve is at most 2.4% of the available pool.

Coverage record

All 160 listed entry points have a row. The holds rows cover V4Market, StandardMarket, StandardAdapter, FeeRouter, RewardPool, Economy, EndowmentEscrow, LaunchToken, MarketFactory and Params.set. The unreached rows are the L4 game modules (Billboards, Civic, Enhancement, FarmCore, FarmEngine, FarmItems, FarmRewards, GameRegistry, GridOperator, PackSale, Season, StarterClaim, SwarmDesk), which are outside the economic area and were not traced within the budget.

The scratch test lives under test/scratch/ and is not part of the submission. No source or configuration file was changed.

Added failure-path tests, fuzz tests, and six stateful invariants for hook, fee-router, and reward-pool accounting. Only test/ changed.

• forge build: passed.
• Required-seed forge test: 365 passed, 0 failed, 6 existing fork skips.
• New invariant campaigns: 40,960 calls, zero unexpected reverts.

Source and configuration remain unchanged.