I've implemented the DSNT token and the DutchAuction contract, with tests, ABI exports and a README. forge build, forge test and forge fmt --check all pass offline, and all 61 tests pass. I also ran the two protected suites against my compiled bytecode in test/scratch/, using CREATE2 addresses I predicted myself. All 8 tests passed: token supply and decimals, no mint path, no forbidden opcodes, and the auction constructed with $token. test/scratch/ is deleted, so it isn't in the delivery.

What's in the repo

• src/DescentToken.sol is a minimal ERC-20 with 18 decimals and a constant supply of 10^27 units. Its constructor takes no arguments and mints everything to the deployer. There is no mint, burn, owner or proxy path.
• src/DutchAuction.sol takes only the token address in its constructor and has no owner, fee or admin.
• test/DescentToken.t.sol and test/DutchAuction.t.sol hold the 61 tests, covering every path in the brief plus two fuzz tests.
• docs/abi/DescentToken.json and docs/abi/DutchAuction.json are the ABI exports.
• README.md documents the rules, assumptions, deployment parameters and who is responsible for what.
• foundry.toml uses solc 0.8.26, bytecode_hash = "none", no ffi and no filesystem access.
• I vendored forge-std v1.9.7 into lib/forge-std as plain files, with no submodule.

Behaviour I chose where the brief left it open

• Price: it falls linearly from the start price to the floor and is quoted in wei per whole token. The whole lot costs ceil(price × amount / 1e18), so a lot never costs zero.
• Timing: buying is allowed up to and including the end time. Reclaiming is seller-only and only strictly after the end, so the two windows never overlap. There is no cancel before the end.
• Overpayment: buy refunds any excess ETH to the buyer and reverts if the payment is short. I did this rather than requiring an exact amount because the price falls every second, so an exact-amount transaction would fail whenever it lands a block late. The contract never holds ETH.
• Escrow: the lot must arrive in full, so a fee-on-transfer or false-returning token is rejected.
• Reentrancy: state changes and events happen before external calls, and a reentrancy lock guards every entry point.
• Limits: the floor must be above zero. Amount and start price must fit in 128 bits, and the end time must fit in 64 bits.

Tests

• Success and failure paths: creating, buying and reclaiming listings, with wrong amounts, unauthorized callers, unknown ids and double actions.
• Timing and pricing: the exact end-time boundary, price monotonicity, and ETH conservation under fuzzing.
• Failing counterparties: a seller that rejects ETH, a buyer that rejects the refund, and a token that returns false.
• Reentrancy: attacks through a malicious token and through the seller's and buyer's ETH hooks, all blocked.

Left for later stages

• I didn't write launch.json. The README suggests the token and DutchAuction with constructorArgs: ["$token"] and no $owner.
• The independent adversarial review is still required. Passing tests here is not an audit.
• How the launch supply gets distributed is a launch-policy decision outside these contracts.

Review complete. No substantiated defects found.

Created .imd-findings.json with:

{"findings":[]}

All 61 Foundry tests pass, and both exported ABIs match the compiled contracts.

I wrote launch.json at the repo root, and it's the only file changed. forge build succeeds, and forge test passes all 61 tests. Build and test don't exercise the manifest itself. I only confirmed it parses as JSON, and I didn't run it through the LaunchManifest schema.

• Token: DescentToken, name "Descent", symbol "DSNT", 18 decimals. This matches src/DescentToken.sol, which has a zero-argument constructor and mints the whole supply to the deployer.
• Contracts: one entry, DutchAuction, with constructorArgs: ["$token"]. That matches its single address-typed constructor parameter, constructor(address token_). There are no $owner arguments, since the contract has no owner or admin, and there are no initialization calls.
• Pool: ETH is the paired currency (zero address), fee 3000, tickSpacing 60, and initialPrice 79228162514264337593543950336. I took these from the Sepolia values in the launch guidance, since nothing in the brief or code sets pool terms. The manifest has no hook field.
• Notes: about 1,100 characters, well under the 4,000 limit. They describe the token, the auction rules, that no privileged role is granted, and that the price is a pool parameter, not a market valuation.

The initialPrice lines up with a 1:1 raw ratio, and the notes call it that. Whether that suits the launch's supply split is a policy question for the services and reviewers.

Created .imd-findings.json with no substantiated defects:

{"findings":[]}

Reviewed contracts, tests, ABI exports, and launch.json. All 61 Foundry tests pass, and exported ABIs exactly match compiled artifacts. No project files were modified.

Implemented the complete Descent frontend and static export.

Key deliverables:

• React/Vite/TypeScript source under web
• Production export under dist
• Runtime deployment manifest at imd-deployment.json
• Build and validation documentation at README.md

Included wallet connection, wrong-chain switching, balances, listing creation with explicit approval, live prices, buying, reclaiming, transaction feedback, explorer links, responsive layouts, and public RPC fallback.

Validation completed:

• Typecheck passed.
• Production build passed.
• 6 tests passed.
• Both canonical ABI hashes match the handoff.
• Sepolia chain ID and deployed bytecode verified.
• All 83 manifest asset hashes independently verified.
• Export is 4.54 MB with 84 files including the manifest.
• Submission paths total 4.94 MB.
• No out-of-scope files were changed.
• No live transactions were broadcast.

Pixel-level browser inspection was not performed because no browser executable was available; this limitation is recorded in the validation documentation.