Implemented the hook, authenticated router, fixed-supply token, mined CREATE2 address, deployment scripts, and documentation.

Verified:

• forge build passes.
• All 35 tests pass.
• forge fmt --check passes.
• Sepolia deployment simulation passes.

Live Sepolia deployment remains pending because no funded signer was supplied. Parameters and instructions are in README.md.

Created launch.json with matching token metadata, LaunchGuard’s constructor argument, and the unhooked pool.

Validation passed: schema/ABI checks, forge build, and all 43 tests, including protected checks. Only the manifest changed outside permitted scratch files.

Notes document hook-address mining, the official Sepolia PoolManager, and the existing simulation-only deployment status.

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I found no defect in the hook's own logic. There are three findings, ranked by severity, in .imd-findings.json (valid JSON). I changed no other files; scratch probes ran in a throwaway copy in /tmp, which I've deleted.

Findings

1. Medium: launch.json:11 can't be deployed through the project factory as it stands. The LaunchGuard constructor (src/LaunchGuard.sol:83) checks its own address and reverts unless the low 14 bits equal 0x20cc. Only about 1 in 16,384 CREATE2 salts gives such an address. I deployed the real creation code, with the Sepolia PoolManager as argument, using salts 0–63: all 64 reverted. The protected project test deploys with a salt the service supplies, and nothing I read says that service picks salts to hit a hook address mask. So unless it does, setup fails with "project constructor failed". The check in the constructor is correct and should stay. Fixing this is a scope decision: either the service supplies a salt found by search for this address, or LaunchGuard comes out of the factory's contract list and gets deployed separately, as DeploySepolia does.

2. Low: test/LaunchGuard.t.sol:436 doesn't test partial fills despite its name. Its price limit is PRICE + 1, so the swap produces zero output and both calls revert with InvalidSwap, not PartialFill. It also accepts any revert, and no test anywhere expects PartialFill. I checked a real partial fill (price limit at tick 10, 3000 ether, both exact-input and exact-output): the hook correctly reverts with PartialFill. So the code is right, but that input appears in no test.

3. Info: the launch token's real pool has no protection. The manifest's pool is a plain ETH pool with a 0.3% fee and no hook. The hook the factory deploys never gets a pool through initialize, so none of the launch rules apply to the launch token's actual market. The README and notes disclose this. I recorded it so nobody reads this launch as sniper-protected.

What I checked and found correct

• Permissions: the 0x20cc flags match the five callbacks the hook enables.
• Initialization: the only way in is through the hook's own initialize call; any other initialization is rejected.
• Fees: exact-input and exact-output surcharges come out to the effective rate f. I derived this algebraically, and the fuzz tests compare both modes against real pools.
• Accounting: the hook's donation debt and credit cancel exactly, so the hook keeps nothing.
• Buyer identity: a buyer can't be faked. Direct calls from other routers and reentrancy from a token callback are both rejected.
• Launch rules: first-block rejection, the window boundary, sells being charged 1%, and state rolling back on any revert all behave as specified.
• Recorded values: the CREATE2 values in deployments/sepolia.json match the current build.

The full suite passes (35 tests).

Two things I didn't count as defects:

• No Sepolia deployment. It wasn't broadcast, but contributor tasks are forbidden to broadcast and the README says so.
• Known limits. Front-running pool creation, other LPs adding liquidity just before a buy to share the donation, and splitting buys across addresses are all accepted in the README.