$200,000 for two files

That ratio is the most informative thing about this contest before you read a line of code.

src/BUILDClaim.sol
src/BUILDFactory.sol

A sponsor putting that much behind that little is telling you two things. They expect the remaining bugs to be subtle, and they are confident everything shallow has already been found. Volume strategies are worthless here. There is nowhere to get lucky.

The upside is that a two-file scope removes the usual excuse. You cannot run out of time before reaching an important contract. If something is there and you miss it, that is on the reading, not the clock.

What the contracts do

Chainlink Rewards distributes tokens from BUILD-program projects to Chainlink ecosystem participants. A project registers through BUILDFactory, deposits its allocation, and participants claim through BUILDClaim: some immediately, the rest unlocking over a schedule, with a penalty for taking the early exit.

Four questions, worked exhaustively

Double claiming. Can the same allocation be claimed twice? Through reentrancy, through a re-submitted proof, or across the boundary where an early claim becomes a vested one.

The early-claim discount. Taking tokens early costs you. Can the discount curve be gamed by timing, and where does the forfeited remainder go? Forfeited value has to land somewhere, and "somewhere" is a design decision worth attacking.

Factory and claim accounting. Can the factory's view of what a project has deposited diverge from what the claim contract will actually pay out? Divergence in one direction is a stuck balance. In the other it is insolvency.

Season transitions. What happens to an unclaimed balance when the next season is configured? Transitions are the least-exercised paths in any distribution contract.

Outcome

No accepted finding.