Implemented the 1% LP fee for the first hour, then 0.3%, through beforeSwap. No owner; only a one-time deadline write per pool.

Included the launch token, vendored dependencies, salt finder, and deployment documentation.

Verified with Solidity 0.8.26: clean offline build, all 31 tests, and forge fmt --check pass.

Created launch.json. Schema validation, forge build, and all 40 tests passed. Only the manifest is deliverable.

Documented blocker: the schema cannot encode required dynamic fee flag 8388608. The manifest’s 3000 describes the normal fee but cannot initialize this hook; deployment compatibility remains unresolved.

Wrote .imd-findings.json.

No substantiated defects found. All four required entry points covered; 31 Foundry tests passed. Production deployment evidence remains unverified. Source files unchanged.

Review complete. The findings file at .imd-findings.json holds an empty findings list and a coverage record of 11 rows, all holds. No source files were changed, and my scratch copy of the verifier floor test was removed.

What I checked, in my area (Execution Trace, Periphery, First Principles)

• Initialize path. PoolManager runs Pool.initialize before calling afterInitialize, so a duplicate deadline write is unreachable, and any hook revert rolls the whole initialization back. The caller check runs before the key checks, so a direct call from anyone else fails first.
• Swap path. The manager reads the third return word as the fee only because the key carries the dynamic-fee sentinel, strips the override bit, and validates it against the one-million ceiling. Both 1% and 0.3% pass and neither blocks exact-output swaps. The returned delta is ignored because no return-delta flag is set.
• Bypass search. The only way to skip beforeSwap in the pinned Hooks library is for the hook itself to be the swap caller. The hook has no fallback and never calls the manager, so that branch is dead. Nothing can call updateDynamicLPFee for this hook either.
• Trap search. The only revert in beforeSwap for a live pool would need a zero deadline, which cannot exist once the manager has initialized the pool. Liquidity removal never calls this hook, so LPs can always exit.
• Periphery. The flag library matches the Hooks bit layout, and the mining script hashes exactly the payload a CREATE2 deployer would use. I ran it offline and the predicted address carries the right low bits.
• Verifier floor. I ran the pinned protected hook test against the real creation code with a placeholder manager address. All three tests passed.
• Vendored libraries. A spot scan of the ERC20, Hooks, fee, parse, Pool and PoolManager sources found no origin checks, hardcoded addresses, or escape opcodes.

Static-analysis leads. The timestamp comparison is the specified mechanism, with drift bounded to seconds against a one-hour window and no profit path, so I did not report it. The three aderyn items are style and missing-event notes with no failing input.

Not reached. Nothing in my assigned area was left untraced. I did not attempt a mainnet fork rehearsal, since the task permits no fork and the floor file itself defers that to the deployer's rehearsal step.

Review complete. The findings file at .imd-findings.json reports no defects in my area, with a coverage record of 11 rows (the 4 listed entry points plus 7 invariants I checked). The working tree has no other changes; scratch tests were removed.

What I covered

The hook's math is a single checked addition in afterInitialize and a single comparison in beforeSwap. I worked through every failure mode in the Math Precision, Boundary and Numerical Gap guides against it:

• Precision. Fee constants are exact pips (1% and 0.3%), the override flag OR fits in uint24, and PoolManager strips and validates the fee. No division, cast, decimal or scale conversion exists in the hook.
• Boundary. Real swaps across every second from 10 seconds before to 10 seconds after the one-hour mark emit the expected fee. The window is [init, init+3600) at 1%, matching the README. The zero-deadline sentinel cannot collide with an initialized pool: timestamp 0 stores 3600, and the only overflowing timestamp reverts atomically.
• Numerical gap. Stacking a protocol fee on the override gives the composed fee PoolManager's formula predicts. Swap params and hookData are ignored entirely, so no bytes decoding or amount-dependent path exists. A 1-wei swap is consumed as fee by v4-core's own math, not the hook's.
• Outside my area. The LaunchToken entry points are unmodified OpenZeppelin v5 ERC-20. I ran the protected hook and token floor suites against the actual creation code and all 9 tests pass, alongside the project's 31 tests.

Leads examined and dropped

• Timestamp overflow on deadline write: reverts under checked arithmetic, only reachable at a timestamp above 2^256 minus 3601. Not a defect.
• Hooks.noSelfCall would skip afterInitialize if the hook itself called initialize, leaving a pool permanently unswappable. The hook has no call path to PoolManager, no fallback and no delegatecall, so this is unreachable.
• Slither's timestamp lead is the intended time-based schedule, not a comparison defect.

Review complete. The findings file is written at .imd-findings.json, both snippets match the tree, and no tracked file was changed. The scratch test lives under the git-ignored test/scratch/ directory.

Outcome: the hook's economics are sound. No critical, high, or medium defect was found in the Economic Security, Invariant, or Flow Gap areas. Two lower-tier observations are reported with reproductions.

Findings:

• Low, stored LP fee stays zero. The hook never calls updateDynamicLPFee, so the pool's slot0 fee reads 0 while every swap is actually charged 1% or 0.3%. Integrators that quote from slot0 instead of simulating the swap will misquote by up to 1%. The v4 fee library's own guidance says a dynamic pool wanting a non-zero opening fee should set it in afterInitialize. Fix is one trusted call in afterInitialize; keeping the stored value exact after the hour would need a write in beforeSwap, which is a scope decision given the brief's "no other state changes".
• Info, window anchored to initialization. The hour starts at pool initialization and ignores liquidity. If the factory seeds liquidity in a later transaction, or initializes ahead of announcement, the surcharge is spent on an empty pool. This matches the brief literally and is recorded as a trust assumption on the factory flow, with the evidence the admission step should obtain.

Checked and holding: the override flag path through Hooks.beforeSwap and Pool.swap, write-once deadline across re-initialization and other pools, zero hook custody and zero return deltas, exact boundary behaviour, JIT self-liquidity by a sniper (net fee per token taken from the launch LP remains 1%), the Slither timestamp lead (no unprivileged trigger, bounded gain), and the hook-as-caller skip in the Hooks library (unreachable). All four listed entry points have coverage rows, plus six invariant and economics rows.

Not reached: nothing within the assigned area. Access-control, math-precision and other specialties were only touched where they intersected the economic path.

Added tests only under test/, covering failure paths, fee boundaries, dust swaps, partial fills, and token/pool invariants.

Clean offline forge build and forge test pass: 47 passed, 0 failed, 0 skipped. Invariant suites exercised 32,768 random calls.

No implementation defects found.

Review complete. The findings file is written and validated, the scratch tests are removed, and no repository file was changed.

Outcome: the hook code itself is sound. The one blocking item is in the manifest, not the Solidity.

Findings written to .imd-findings.json

1. Medium, launch.json line 21. The manifest says pool fee 3000, but the hook only accepts the dynamic-fee sentinel 8388608. Initializing with the manifest's key reverts inside afterInitialize, so the deploy transaction fails atomically. The schema caps fee at 1000000, so no manifest edit alone can express the sentinel. Needed before admission: schema or deployer support for dynamic-fee keys, or a design change. Removing the hook's check would be wrong, since v4 silently ignores the fee override on static-fee pools.
2. Low, AntiSnipeHook.sol line 54. Merged from the economics specialist and reproduced. The stored pool fee stays 0 because afterInitialize never calls the manager's fee updater, while swaps are charged 1% then 0.3%. Only slot0 readers are misled. A one-line fix exists if the author accepts one trusted call to the manager.
3. Info, AntiSnipeHook.sol line 69. Merged from the economics specialist and reproduced. The hour starts at initialization, not first liquidity. This matches the brief. Evidence is needed that the factory seeds liquidity in the same transaction.
4. Info, launch.json line 6. The constructor argument is the Ethereum mainnet PoolManager. On any other deployer queue the constructor reverts for lack of code there, so the chain selection must be confirmed as mainnet or the argument replaced.

What I verified

• Full suite passes: 47 tests including fuzz and invariant runs.
• The protected hook and token floors pass locally against the real creation code with the manifest's manager argument etched into place.
• Every reproduction above was run in a scratch test before being recorded.
• The permissions, flow and math specialists reported nothing, and my own pass over caller checks, selector returns, hook address bits, the pre-deployment initialization guard, and the token's ERC20 paths found no further defects.

Coverage: all four listed entry points are answered, plus rows for beforeSwap, the constructor, and two invariants. No finding is critical or high, so no proof test was attached.

Recorded both findings in .imd-responses.json.

Manifest unchanged: required fee 8388608 exceeds the schema maximum 1000000. Deployment remains blocked on schema/deployer support and chain verification.

forge build succeeded; all 43 tests passed, including protected checks and reproductions.

Updated launch.json to use $poolManager and answered both findings in .imd-responses.json.

Schema validation, forge build, and all 44 tests passed.

Deployment remains blocked: the hook requires fee 8388608, but the schema caps it at 1000000. This reproduced and cannot be fixed within the manifest-only scope.