Created launch.json matching the contracts, constructor arguments, permissions and required pool settings. Notes clarify owner-operated buybacks.

Manifest checks passed. forge build succeeded; all 57 tests passed with the required fuzz seed. Only launch.json is changed for submission.

Review complete. The findings file is valid JSON with one finding and 17 coverage rows, and the snippet matches the tree at the cited lines.

Outcome: the permission model holds, with one low-severity trust-gap finding.

I traced every TidalHook and TidalToken entry point against the Access Control, Trust Gap and Asymmetry guides. The callbacks are gated by onlyPoolManager, pool initialization additionally requires the launch factory and the exact canonical pool key, and the owner's only powers are changing the treasury recipient and executing price-bounded buybacks. No path moves ETH anywhere except to the configured treasury or into the pool for tokens that are burned in the same callback. The unlock authorization is consumed on entry and only reachable from the hook's own unlock. The 57 existing tests pass, and the delta accounting I relied on matches the vendored v4-core.

Finding (low): setTreasury rewrites the recipient of already accrued fees without settling them, and claimTreasury is permissionless. Anyone can front-run an owner's treasury change with a claim and force the full accrued balance to the previous address. This only matters when the previous recipient is one the creator no longer wants paid, so it is a race on an owner error rather than a bypass. The scratch test under test/scratch/TreasuryRace.t.sol demonstrates it against the current code.

Coverage notes for the judge:

• All 14 listed entry points have rows. Twelve hold, two carry the finding.
• The hook hard-codes ETH pairing, fee 12500 and tick spacing 60 in its pool key. I could not verify these against the manifest assignment, so that row is marked holds with the caveat.
• Owner-chosen buyback bounds and the manipulable volatility signal are documented trust assumptions, not reported as defects.
• Static analysis leads on reentrancy, strict equality and weak randomness were checked and are benign in context.

The review is complete. The findings file is written and parses, the scratch tests are removed, and the working tree is clean apart from the ignored output file.

Outcome: no defect above info in the math area. The fee arithmetic, casts, rounding carry, decay window and buyback settlement all hold under the Math Precision, Boundary and Numerical Gap checks. The findings file holds one info-level rounding note and eighteen coverage rows, all fourteen listed entry points answered.

What I verified, by reading and by scratch tests against the vendored PoolManager:

• Rate bounds. Dynamic premium is capped at 17,000 pips and the launch surcharge at 200,000, so the uint24 sum never exceeds 220,000. The first swap in the opening block quotes 20.3%, a 20 ETH shock saturates to 2.00%, and continuous trading followed by idle blocks returns to 0.30% exactly eight blocks later.
• Delta routing. I traced all four settlement modes through v4's Hooks.beforeSwap and Hooks.afterSwap in the pinned core. Full-fill equality in afterSwap is exact because v4 drives the specified remainder to zero. Every narrowing cast is guarded before it happens.
• Split and claims. The floor/ceil carry keeps cumulative treasury at floor(F/2) with no drift. Hook ETH plus claims always equals treasury plus buyback accruals, and manager ETH always covers outstanding claims because each claim was backed by the swapper's settled input. A claim-funded buyback followed by a treasury claim kept the accounting invariant.
• Buyback. Budget, price limit, deadline and output floors are checked, unspent budget is restored, and the callback's deltas net to zero. A 5.075 ETH buyback burned the tokens it bought with every invariant intact.

The one finding (info). Exact-input buys and sells compute the fee with floor division, so ETH amounts under about 333 wei at base rate pay no hook fee, while exact-output paths round up. The README documents this asymmetry, impact is under 1 wei per swap, and splitting a real trade to exploit it costs far more gas than it saves. Reproduction and probe logs are in the file.

Checks run. The project suite with forge test --offline passed 57 tests with 0 failures before I started. My two scratch probe files ran 11 tests, of which 3 failed only on my own router budget assumptions, not on hook behaviour. The static-analysis leads on the hook (strict equalities, reentrancy, timestamp) all trace to guarded or benign paths and were not promoted to findings.

The economics review of TidalHook and TidalToken is complete. The findings and a 19-row coverage record are in .imd-findings.json at the repository root. No files in the tree were changed, and the scratch tests I used for reproduction were removed.

Outcome: no fund-loss defect found in the assigned area. The fee flows, 50/50 split, claim fallback, buyback settlement and volatility decay all trace correctly against the vendored v4-core, and the existing 57 tests plus both stateful invariant suites pass. I reported three economic items, each with a concrete reproduction from a Foundry run:

• Low. Volatility signal is manipulable by any trader. The hook measures cumulative absolute tick movement, not net price change. One same-block round trip of 40 ETH in the fixture pool pinned every other swap at the 2.00% cap. The victim paid 0.020 ETH on a 1 ETH buy instead of 0.003 ETH. The fee then decayed over eight blocks with no real price change. The attacker's cost was about 1.87 ETH, so this is griefing, not profit. The README already calls the signal manipulable.
• Low. Buyback share has no fallback. Half of every fee only leaves the hook through an owner-signed executeBuyback. With an inactive owner or a lost key the funds idle forever. With no liquidity in the pool the call reverts with NoTrade and the 0.5075 ETH budget in the reproduction is stuck. This is a documented trust assumption, flagged for the requester to weigh against the brief's wording.
• Info. Launch surcharge also hits sells. A 1 TIDAL sell in the opening block pays 20.3% of its ETH proceeds. The brief frames the surcharge as anti-sniper, so the requester should confirm early sellers were meant to pay it.

Coverage. All 14 listed entry points have a row. Twelve hold, and afterSwap and executeBuyback reference findings 1 and 2. Five extra rows record the invariants I verified by tracing every writer: treasury and buyback partition, assets backing liabilities, identical rate in beforeSwap and afterSwap, and the 22%/2% rate ceilings. One row dispositions the Slither and Aderyn leads as non-findings with the guard that defeats each.

What I did not reach. I did not run a Sepolia fork or test against a real launch factory's seeding pattern, so the launch-window behaviour with the factory's actual price and range remains an assumption from the README.

Review complete. The findings file is written and the scratch probe directory removed, so the tree is unchanged apart from .imd-findings.json.

Outcome. No critical, high, or medium defects in the control-flow area. The hook's execution paths are sound: every callback is PoolManager-gated, the unlock callback is reachable only from the hook's own unlocks with a consumed action flag, fee deltas net to zero in all four swap modes, the fresh-manager claim fallback works at the real launch price, and the patched vendored libraries are equivalent to upstream. All 57 existing tests pass, and my own probes (token-only seeding at the 20 ETH market-cap price, a sync-before-swap router, two swaps in one unlock, plain ETH refusal) behaved as the README describes.

Findings recorded (4):

• Low, buyback stranding. The buyback half of every fee is spendable only by the owner through executeBuyback. There is no permissionless fallback, so a lost or idle owner strands 50% of all fees forever. This deviates from the brief's wording that the half "is used to buy back".
• Low, volatility fee griefing. One 340-tick move in a block sets the 2% cap for every trader for 8 blocks, and the first swap in a block raises the fee for later swaps in that block. Observed concretely: the second swap in one unlock paid 22% where the quote before the first swap was 20.3%.
• Info, partial-fill reverts. ETH-specified swaps revert on any partial fill, unlike the token-specified modes and unhooked pools. Documented by the author, recorded for integrators.
• Info, hard-coded tick spacing. The manifest must write tickSpacing 60 exactly or the factory's initialize reverts.

Coverage. All 14 listed entry points have rows (12 hold, 2 reference findings), plus rows for the beforeSwap callback, the asset-backing invariant, and the patched periphery libraries. Nothing was left unreached. No proof files were attached since no finding is high or critical.

Added failure-path, boundary, atomic settlement, and multi-actor invariant tests. All changes are under test/.

Validation passed offline with the required seed: 86 tests, 0 failures, 0 skips, including 24,576 invariant calls. forge build also passes.

No reproducible contract defects were found.

The review is complete. The findings file is written and validated, the scratch directory is removed, and no tracked file was changed.

Outcome: five findings kept, none above low severity. No loss-of-funds or deployment-blocking defect was found. The build compiles and the full existing suite passes (86 tests, two invariant suites with zero unexpected reverts).

Findings kept, each reproduced with a Foundry test against the real PoolManager:

• Low, setTreasury race. The owner's recipient change does not settle accrued fees first, and claimTreasury is permissionless, so a stranger can front-run the change and pay the whole accrued balance to the old address. Reproduced: 1.015 ETH paid to the stale address, zero to the intended one.
• Low, volatility signal pinning. The fee signal is cumulative absolute tick path length, so one same-block round trip with no net price change pins every trader's fee at the 2.00% cap for 8 blocks. Reproduced: a 40 ETH buy and sell-back left the tick at -10 but the quote at 20000 pips, and a victim paid 0.02 ETH on a 1 ETH buy instead of 0.003 ETH. Two specialists reported this and I merged them.
• Low, owner-dependent buybacks. The buyback half of every fee can only be spent by an owner call to executeBuyback, with no fallback. Reproduced: a stranger is refused, and with liquidity withdrawn the owner's call reverts with NoTrade, leaving 0.5075 ETH queued. Two specialists reported this and I merged them.
• Info, launch fee on sells. The 20% decaying surcharge applies to sells too. Reproduced: a 1 TIDAL sell in the launch block paid 0.2003 ETH of 0.9865 ETH gross.
• Info, ETH-specified partial fills revert. Exact-input buys and exact-output sells revert on any partial fill while the token-specified paths settle partially. Reproduced against the same price limit on both modes.

Dropped: the math specialist's dust-rounding note, which the specialist itself marked as needing no change, and the flow specialist's tick-spacing note, since launch.json already writes 60 and the fee 12500 matches the hook's hard-coded key.

Coverage: all 14 listed entry points are answered, 10 holds and 4 finding, plus two invariant rows. My own pass confirmed delta accounting nets to zero in all four swap modes, the claim-mint fallback on a token-only seeded manager, self-swap callback exclusion on buybacks, permission mask 0x10cc matching getHookPermissions and the manifest, and bytecode sizes under both limits.