The review is complete. The findings file is written and validated, no tracked file changed, and the working tree is clean apart from the ignored build output.

Result: no reproducible defect. The game logic, its money paths and its exits held up under every pass of the Pashov checklist, and the three earlier audits' regressions all still pass. The findings file holds two info entries: a coverage record and one trust assumption.

What was read. All three sources in full (LightsOn, LightsMath, ISqueek), the mocks, the base harness and the money, time and attack audit suites. The full suite passes with 103 tests, including the invariant runs with fail-on-revert.

What I traced with concrete values. Every state-changing entry point and the invariants they rest on:

• A night can only close once its blackout's second round, or its station round, has ended, so no bet can arrive for a night after that night is settled. Bets are sorted by round and night boundaries strictly increase.
• Winner shares telescope to exactly the pool, and the pool equals what the contract holds for that night. The void-time bonus pot equals the sum of rolled losing stakes, so the subtraction on refund cannot underflow.
• Every read of the core is a self-call with a fixed gas budget, so a revert, a wrong shape, no code, or a page breaking the ordering rules never blocks a bet, a claim or the exit. The stall flag only counts for the same kind of stall and clears when the core settles anything.
• No owner, setter, proxy, pause or mint. The compiled runtime has no reachable DELEGATECALL, CALLCODE or SELFDESTRUCT and is 16,808 bytes. The constructor touches no external contract, so it deploys on an empty chain.

What was reached on Sepolia. Both live addresses, with results that match the mock the tests use:

• SqueekCore is a transparent proxy. Its state() returns the eight declared words, and roundPage certifies through next-active-minus-one on truncation, puts the last record's work in the end position, certifies an empty range through the requested end, reverts past the settled round, and costs about 124k gas for a full page.
• SQK is a plain OpenZeppelin ERC-20 with burn(uint256) on the caller's own balance, true-returning transfers, no fees, hooks, owner or pause.
• Rounds 967 through 1002 are quiet and the last ride was 965 to 966, so start round 1000 passes the deploy check from the time audit no matter when the deployment lands.

The one thing the adapter should carry forward. The core's proxy admin can replace its implementation. A reply the game cannot read is handled by the stall-and-void path, but a well-formed reply with different meaning would settle nights as if real. That is the accepted design, recorded as info rather than a defect.

Launch preparation is complete. The existing constructor already supports the factory, so game contracts and rules remain unchanged.

Added six launch tests, documented the exact configuration, and recorded both audit findings—including SqueekCore’s upgrade trust—in ADAPTATION.md.

forge build passed. Offline forge test passed 109 tests with the supplied seed. Actual deployment remains with the launch service.

Created launch.json for LightsOn with the exact five approved constructor values. Only the manifest is changed for submission.

Validation passed: manifest structure, compiled constructor ABI, forge build, and all 109 tests using the supplied fuzz seed.

The review is complete. The findings file holds an empty findings list and nine coverage rows, and the scratch tests are deleted.

Outcome: no arithmetic, boundary or numerical-gap defect was substantiated in src/LightsOn.sol or src/LightsMath.sol.

What I checked

• Math Precision. The burn is a floor of 2% of what winners take, and it never truncates to zero above the 10 SQK minimum. Winner shares are differences of cumulative floors in bet order, so they telescope to the exact pool. Every downcast was bounded by hand: rounds fit uint32, stakes fit uint96, and weight sums stay far below uint128 even at ten thousand maximum bets on bulb 24.
• Boundary. The bit shifts in the walker and in the lit-before mask are bounded by the station length minus one, which the constructor caps at 63. I read the live SqueekCore on Sepolia and confirmed a full 16-record page ends at its last record's position, an empty page has equal start and end positions, and state() returns eight words, so readCorePage accepts real pages. SQK exposes burn, transfer and transferFrom with boolean returns and has no pause selector.
• Numerical Gap. The bonus pot always equals the losing stakes of ROLLED nights after the last PAID night, which is what a void refunds. A settle budget that ends exactly on a night's last bet completes the night on the next call without double counting. Bets in a night's last two rounds can only refund or lose, which matches the rules.

Verification. The full suite passed, 109 tests including the invariant run with zero reverts. Four scratch tests I wrote for the seams above also passed, then were removed.

Noted, not a defect. The stall threshold requires 145 ended rounds behind, not 144. An existing audit test asserts this reading, so it is the author's documented intent.

All seven entry points are marked as holding, with reasons, plus two invariant rows.

Review complete. The findings are in .imd-findings.json with one finding, its failing proof test, and eleven coverage rows.

What I reviewed. The permissions area for LightsOn: the Access Control, Trust Gap and Asymmetry passes from the Pashov reference, applied to all seven state-changing entry points, the constructor, the two self-call read helpers, and the launch configuration. The baseline suite passes on this tree (109 tests, including the invariant run). No file outside test/scratch/ and the findings file was changed.

Finding (low), flagStall() / void() at src/LightsOn.sol:500. The "core unreadable for 144 rounds" stall guard is measured from the walker's own cursor, which only moves when someone pokes. During a quiet spell with a healthy core, nobody pokes, so after 145 rounds a single block in which the core reverts lets anyone flag a stall at once, and a second single-block revert a day later voids the game for good, although the core settled every round in between. The same applies at launch if deployment lands more than 144 rounds after the fixed start round 1000. No funds are lost, since void refunds, but the game cannot be restarted and the documented guarantee does not hold. I rated it low because an unprivileged caller cannot make the core unreadable; it takes the core's operator or an outage. The proof under test/scratch/StaleCursorFlag.t.sol fails on this code at the flag step.

What holds. bet and betUntil pull only the sender's SQK and the one-bet-per-night check cannot be bypassed. claim pays only the stored owner and its status transitions are one-way. poke and settle cannot be gas-starved or paged into a bad state. The healthy-core sweep in my control test never flags or voids. There is no owner, initializer or upgrade surface, and the factory gains no role.

Not reached. The site and data folders, the money-area rounding in LightsMath, and the live SqueekCore's pause semantics, which decide how often the trigger above can occur in practice.

Review complete. The findings file is written and its quoted snippet matches src/LightsOn.sol:500 exactly. Git itself is unavailable in this sandbox (the gitconfig read is denied), but the only files I created are .imd-findings.json and the scratch proof test under test/scratch/, which the assignment allots to me.

Outcome: one medium finding, control-flow area otherwise holds.

• Finding 1 (medium), src/LightsOn.sol:500. The "unreadable" stall branch counts the 144 rounds from the walker's cursor, which only moves when someone calls bet, claim or poke. After a day with no calls, one block in which the core does not answer lets anyone flag a stall at once, and one more such block 24 h later lets void() end the game, even though the core answered every block in between and still serves a finished night nobody read. The winner of that night is refunded at stake and the loser gets their stake back. I state the preconditions plainly: the core must fail at two moments a day apart, which an unprivileged caller cannot cause against a healthy core, and nobody may poke in between. The proof test fails on the current code at the "not voided" assertion. The existing F1c regression covers only the mixed case (a lag flag followed by an unreadable moment). Suggested fix: measure the unreadable kind from the last round the core was observed readable, recorded on every successful read.

What I verified and found sound

• All 109 existing tests pass, including invariants at 48 runs by depth 200.
• Bet ordering, night-run completeness at settlement, the 64-bit night bitmap, the one-bet-per-night check, partial settle resumption, claim readiness and the bonus-pot accounting after a void all trace correctly.
• Reentrancy: core reads are staticcalls through self-calls with fixed gas; the money-moving entry points are guarded.
• Live Sepolia checks against the real SqueekCore: time-based round 1006 matches the core's settled round 1005, every page from round 0 to 1005 passes the walker's BadPage rules, afterRound is exclusive, and rounds 999 to 1005 are quiet, so the start round of 1000 is valid.

Coverage record: all seven entry points have rows (five holds, flagStall and void marked finding), plus four invariant rows. Nothing in my area was left unreached.

The review is complete and the findings file is in place. Nothing in the repository was changed: the only files I created are the untracked .imd-findings.json and one scratch test under test/scratch/, which is not kept.

Outcome. The economics of LightsOn hold. I found no loss, misdirection or stranding of funds in the settlement maths, the bonus-pot chain, the burn, the claims or the void refunds. The full repository suite passes on this tree (109 tests, including the invariant run at 48 runs by 200 depth). I report one low finding and one informational observation.

Finding 1, low. The 7-day void is judged on certified rounds only, so it is legal in the round a new ride departs, before the core certifies that round. The actor with the strongest incentive to use it is a loser whose stake rides in the bonus pot, because a void hands that pot back to such losers. The reproduction and a proof test are in the findings file. The proof test fails on the current code and expects void to be refused while the departure round is in progress. This is within the written rule, so it is a design decision for the author, not a loss of funds.

Finding 2, info. The weight rule gives any late bet on the nearest winnable bulb a fixed weight of 3, equal to an early bulb-3 bet that carried four rounds of risk. It is the published rule and moves no funds; it is recorded as an economic observation only.

What I covered. All seven entry points have coverage rows: six hold and void carries finding 1. I also recorded rows for the three money invariants and for both live dependencies. I checked the Sepolia SQK bytecode selectors and the live core pages: SQK is a plain OpenZeppelin ERC20 with permit and burn, no pause, owner or proxy; the core is settled through round 1005 and rounds 985 to 1005 are quiet, so the start round 1000 is after a blackout as the brief requires.

Not reached. I did not fork Sepolia to exercise the real token and core end to end; the dependency rows rest on bytecode selector inspection, live read calls and the earlier adaptation's checks. Everything else in my area was traced in the source.

I wrote 24 new tests for the LightsOn launch, in three files under test/. The full suite passes with forge build and forge test using the verifier's fuzz seed: 133 tests, 0 failures. The 109 tests that were already there are unchanged. I didn't touch anything outside test/, and I found no defects in the contract, so there is no .imd-findings.json.

The files are staged but not committed: git has no author name or email set on this machine, so the commit failed, and I didn't change your git settings. The earlier imd … commits suggest the upload step makes the commit itself. If not, the three files are in the staging area ready to commit.

What the tests use. They deploy the game the way the launch will: the exact constructor encoding (0x980b…3d44, 0x5501…db60, 1793022600, 36, 1000) through a zero-value CREATE2 on an empty chain. Only after deployment do they put the test versions of SqueekCore and SQK at the two Sepolia addresses.

Invariant tests (test/LightsLaunchInvariant.t.sol, 24 runs × 150 calls). The random calls include:

• rides, breaks, blackouts, 6-hour ends and sleeps of up to about 8 days;
• the core going down, stopping recording, and recovering;
• flagging a stall, trying to end the game, and burns that fail;
• valid and invalid bets, betUntil, and a third party collecting for others, including the same bet twice in one call.

After every call these must hold:

• No SQK is created or lost, and whoever collects for others is never paid.
• The contract holds exactly what it owes, whether the game is running or has ended. A losing stake still in the bonus pot can't be collected until the game ends, and is paid back in full after.
• What each player received equals what betOutcome says their collected bets were owed, and the total paid out never exceeds the total staked.
• A settled ride never changes, rides are never removed, and an ended game stays ended.
• The game never reads rounds at or before 1000 or a round still in progress. Rides don't overlap and last at most 36 rounds.
• Bets stay in round order, with one bet per wallet per ride.

At the end of every run the test forces the game to end and collects every bet; the contract must be left holding only SQK that a failed burn couldn't destroy.

Failure paths (test/LightsLaunchFailures.t.sol, 23 tests). These cover every refusal the contract has:

• Bad setup: zero addresses and ride lengths outside 4–64 are refused; the exact edges 4 and 64 are accepted.
• Bad bets: bulb 0 or 25 and above, amounts below 10 or above 10,000 SQK (plus a fuzz test), a bet before the game starts, a late betUntil, and a second bet in the same ride. The exact limits are accepted, and the last 60 seconds of a round count as the next round.
• A misbehaving token: a token that refuses to move funds makes the bet or collect fail, and the bet can still be collected later. A token that calls back into the game is blocked.
• A misbehaving core: broken pages are rejected and the game reads nothing from them, while bets and collects still work. Rounds not yet recorded can't be checked for activity.
• Stall and ending the game: the stall check refuses to run without enough gas, a short outage isn't a stall, ending is refused before the 24-hour wait, and a stall flag is cleared if the core recovers. A ride that has ended must be settled before the game can end, and it pays as it ended.
• Collecting: unknown or not-yet-settled bets are skipped, and a stake rolled into the bonus pot can't be collected while the game runs.

Three failures I hit while writing these were mistakes in my test harness, not the contract, and I fixed them:

• A vm.prank was used up by a read call made before the bet.
• I forgot that placing a bet can settle a ride and burn SQK, which changed the balance I was checking.
• One test step moved time backwards, which can't happen on chain.

The shared deploy helper is test/LightsLaunchFixture.sol.