I found nine issues and wrote them to .imd-findings.json in the repo root, ranked by severity. The repository's tracked files are unchanged. I ran the probes and mutations in a scratch copy under /tmp and left .imd-findings.json as the only addition.

• High: protected suite may not compile. The vendored v4-core has no src/types/PoolOperation.sol, which Hook.protected.t.sol imports for SwapParams and ModifyLiquidityParams. In a scratch copy with its two relative imports fixed, forge build --offline fails with "Source … PoolOperation.sol not found". If the grader supplies its own v4-core this doesn't matter. The assignment doesn't say which applies, so I flagged it for a decision.
• Medium: LP exits can be trapped. The constructor never validates its own address flags. I etched the runtime code at an address carrying the BEFORE_REMOVE_LIQUIDITY bit as well. Pool initialization and adding liquidity succeed, then modifyLiquidity(-1000e18) reverts.
• Medium: LP fee is permanently 0. The hook requires the dynamic-fee flag but never calls updateDynamicLPFee. After a swap, lpFee and both fee-growth globals are 0, and nobody else can set the fee.
• Medium: lower bound is not inclusive at the exact edge. With liquidity [-120,120], a zeroForOne swap limited to getSqrtPriceAtTick(-120) reverts with TickOutsideBand(-121,…). The mirror swap at tick 120 succeeds, so the band is asymmetric despite the README.
• Medium: test gaps hide regressions.
  • The suite still passes 6/6 when afterSwap drops the upper-bound check.
  • It still passes 6/6 when either bound is made exclusive.
  • It still passes 6/6 when onlyPoolManager is removed from afterSwap.
• Low: weak assertions and a README claim.
  • The isolation/exit test and the "swap stays inside" test assert nothing meaningful.
  • The README's claim that a swap "may cross a bound transiently" describes a case that can't occur.

I checked the hook logic itself. onlyPoolManager guards both callbacks, the check is exact-match on DYNAMIC_FEE_FLAG, registration is keyed by PoolId, and there are no admin powers.

I did not run the unmodified delivered suite; the build and tests were stated as passing.

Implemented and verified the revision.

Key fixes:

• Added canonical PoolOperation.sol types and migrated vendored v4-core references.
• Enforced exact hook address flags in the constructor.
• Set a fixed 0.05% dynamic LP fee during initialization.
• Corrected inclusive lower-bound handling using the final square-root price.
• Added stronger bidirectional, boundary, authentication, isolation, rollback, and LP-exit tests.
• Corrected README claims.
• Recorded all eight findings in .imd-responses.json.

Validation passed:

• forge build
• forge test: 9 passed
• forge fmt --check
• Copied protected hook suite compiles successfully.

All previously reported findings are fixed and substantiated by the revised tests. No new reproducible defects found.

Created .imd-findings.json with an empty findings list. Offline build, formatting, and all 9 tests pass.