Done. src/Hook.sol is the only file changed.

What it does

• getHookPermissions flips beforeSwap to true; every other flag — including beforeSwapReturnDelta — stays false.
• mapping(PoolId => uint256) private _swapCount holds one counter per pool.
• _beforeSwap increments _swapCount[key.toId()] once per call (direction-agnostic, since it ignores SwapParams) and returns (IHooks.beforeSwap.selector, BeforeSwapDeltaLibrary.ZERO_DELTA, 0) — no fee taken, no delta claimed.
• swapCount(PoolId) is the public view getter.

I also corrected two doc lines that pointed at a HOOK_FLAGS constant which no longer exists — test/BaseHookTest.sol now derives the address from getHookPermissions itself, so no test-side change was needed for the new flag.

Verification — forge build clean; forge test 17/17 pass (8 existing in test/Hook.t.sol, 9 written in test/scratch/). The scratch tests cover: counter starts at zero, increments per swap in both directions, stays independent per pool, unknown pool reads zero, hook takes no ETH or token, liquidity changes and donations don't bump it.

Two behaviors worth flagging, both checked against a bare hookless pool for equivalence:

• A buy on a hooked pool produces byte-identical deltas to the same buy on an identical hooks: address(0) pool.
• The zero-liquidity case does not revert in v4 — the swap returns zero deltas on both the hooked and hookless pool. The hook still counts that call as a swap, since beforeSwap fires.

Done. Clean build, 37/37 passing, only test/Hook.t.sol modified.

What I wrote

test/Hook.t.sol — kept the six existing accepted tests verbatim and added 31, in four groups:

Counting works — one per swap; either direction; exact-input and exact-output; from any caller; through any router; regardless of hookData (fuzzed); regardless of size (fuzzed); cumulative over a fuzzed sequence of buys and sells.

Keyed per pool — two launch pools sharing the hook keep separate tallies; two fee tiers on the same token pair keep separate tallies; an unknown pool id reads zero (fuzzed) rather than reverting.

Failure paths (the majority, since that's where a counter actually breaks) — a direct beforeSwap call from a non-manager reverts and cannot inflate the tally; a zero-amount swap reverts before the hook; a swap past an already-exceeded price limit reverts after the hook has incremented, and the increment goes back with it; an uninitialized pool; a swap that prices fine but can't be settled. Plus liquidity add, liquidity remove, donate, and pool initialization — none of which count.

Neutrality — measured against a control: an identically shaped launch pool, same fee tier, same seeded liquidity, no hook. Swap deltas match exactly in both directions and both exactness modes; add/remove liquidity deltas match; donations match, including both pools refusing one identically when no liquidity is in range; the zero-liquidity swap matches. The hook holds no ETH, no token, and no ERC-6909 claims.

Verification beyond "it passes"

I built seven broken hooks in test/scratch/ and ran the delivered suite against each: a global counter instead of a mapping, a counter that only counts buys, one that double-counts, one that skims 1% via beforeSwapReturnDelta, one that declares an extra permission, one that skips counting when hookData is non-empty, and one that filters on the sender argument. All seven fail, each on a named assertion. The last two exposed real gaps — I added testFuzz_CountsSwapsWhateverTheHookDataSays and test_CountsSwapsThroughAnyRouter to close them.

Reported rather than blessed

One info finding in .imd-findings.json: swapCount counts swap calls, not filled trades. v4 doesn't reject a swap against a pool with no in-range liquidity — it walks the price to the limit, returns a zero delta, and doesn't revert. That call is counted, as is a swap so small the fee rounds the fill to zero. The hook can't tell these apart without afterSwap, which is outside this task. I flagged it because two of my tests pin that behaviour as correct and the name swapCount reads like a count of trades.

Two things worth knowing, neither a defect:

• Enabling a permission moves the pool from dynamic-fee-at-0% to a static 0.30% tier — that's BaseHookTest.poolFee() doing what its comment says, not the hook. Swap output is therefore smaller than the empty-hook template gave, and the difference is LP fee, not hook fee. I pinned it in test_PoolIsAnOrdinaryStaticFeeTier and made every neutrality comparison use a control on the same tier, which isolates the hook from the tier.
• beforeSwap's sender is the router, never the trader behind it — so test_CountsSwapsFromAnyCaller alone couldn't catch a sender-filtering bug, which is why the second-router test exists.

Review complete. No substantiated defects found.

Wrote .imd-findings.json with {"findings":[]}.

Validation: formatting and build passed; all 37 tests passed with 1,000 fuzz runs. No Solidity files were changed.

launch.json is written. Verification:

forge build   Compiler run successful
forge test    37 passed; 0 failed; 0 skipped
git status    ?? launch.json          (nothing else touched)

What it says

hook	contract Hook, src/Hook.sol, getter swapCount(PoolId poolId) returns (uint256)
hook.permissions	all 14 fields, beforeSwap: true and every other one false
token	contract LaunchToken, src/LaunchToken.sol, "Launch Token" / LAUNCH, 18 decimals
pool	currency0 address zero (native ETH), currency1 LaunchToken, fee 3000, tickSpacing 60, hooks Hook

The permission block is a field-for-field copy of the struct literal at src/Hook.sol:47-62 — same 14 names, same values, same order — and test_EnablesBeforeSwapAndNothingElse (passing) asserts that struct is what the deployed hook actually returns, so the manifest matches the implementation rather than the source alone.

I left out supply, ownership, allocation and price entirely, including the pool's starting tick, since that is price by another name. The 0.30% fee tier is in there as a pool parameter: it is what BaseHookTest.poolFee selects once the hook declares any permission, so it describes the pool this hook is for rather than a launch price.

One thing to flag. The launch manifest schema is not in this working tree — no *.json exists anywhere in the repo, nothing under src/, test/, lib/ or git history mentions a schema or manifest, and I can't fetch one (no network commands). So the field layout above is my reading of the task's own sentence — "name the hook and token contracts, the permissions … and the pool it is for" — expressed as the most conventional JSON shape for it, not something I validated against a real schema. The contents are verified against the code; the key names and nesting are an informed guess. If the schema turns out to want a flat contracts: { hook, token } plus top-level permissions instead of the nested hook/token objects, that is a rename away and nothing about the described facts changes.