The Silent Cat token is built, tested, documented, and committed.

What was delivered

• src/SilentCat.sol is a fixed-supply ERC-20 on the vendored OpenZeppelin v5.1.0 ERC20. The constructor takes no arguments and mints the full 1,000,000,000 SCAT with 18 decimals to msg.sender, which is the launch factory. There is no owner, mint, pause, blacklist, tax, or burnFrom. Holders may burn their own tokens.
• The contract name SilentCat is 9 characters, within the 32-character manifest limit.
• foundry.toml pins solc = "0.8.26" and sets bytecode_hash = "none", with no ffi, no filesystem permissions, and the verifier's fuzz seed pinned.
• forge-std v1.9.7 and the OpenZeppelin ERC20 subset are vendored under lib/ as plain files with their licenses. No submodules remain, so the offline verifier can build.
• test/SilentCat.t.sol holds 30 tests covering metadata, supply, exact-delivery transfers, allowance paths, zero-address and insufficient-balance failures, self-burn, a sweep of 20 admin selectors from both the deployer and a stranger, opcode scanning for DELEGATECALL, CALLCODE and SELFDESTRUCT, ether refusal, and four fuzz tests. test/DeploySilentCat.t.sol exercises the reference deploy script's deploy() function directly.
• README.md documents behaviour, assumptions, the manifest values, launch-decided parameters, operational responsibilities, and the security checklist items applied.

Verification

Check	Result
forge build	passes on solc 0.8.26
forge test with the verifier's fuzz seed	31 passed, 0 failed
forge fmt --check	passes

A scratch test also mirrored the protected floor's CREATE2 deployment from a factory address, the 10% distributor transfer, and the claim transfer, and it passed before the scratch directory was removed. The protected test's Uniswap v4 seed and swap paths could not be run locally since v4-core is not in this repository, but a tax-free standard ERC-20 moves exactly what those flows request.

Slither and Mythril were not run because they are not available on this machine. Everything is committed in a single commit on main. The harness's own .claude/ directory was left uncommitted.

Done. launch.json is written at the repository root and is the only new or changed file.

What the manifest says

• Kind is custom_token. The token contract is SilentCat with name Silent Cat, symbol SCAT, 18 decimals, an empty constructorArgs list and totalSupply of 1000000000000000000000000000 minor units, which is exactly what the constructor mints to msg.sender.
• contracts is an empty list, since the accepted tree contains only the token and no application contracts.
• pool and economics are copied verbatim from the launch reference: IMD pair at the given address, fee 12500, tick spacing 60, the one-to-one initialPrice, and the requester's economics object unchanged.
• notes describe the token's fixed supply, the absence of any privileged powers or transfer fees, the self-only burn function, and that initialPrice is provenance only.

Checks run

• The JSON parses and has exactly the six schema keys. Notes are well under the 4000 character limit.
• The compiled ABI confirms the constructor takes no inputs, matching the empty constructorArgs.
• forge build and forge test with the verifier's fuzz seed passed all 31 tests.
• git status --porcelain shows only the new launch.json.

The review is complete and written to .imd-findings.json. The working tree is otherwise unchanged.

Outcome: no math defects. Silent Cat is a plain OpenZeppelin v5.1.0 ERC20 with one constructor mint of exactly 1e27 minor units to the deployer and a self-only burn. The three assigned guides have almost nothing to bite on, and everything they do name holds.

What I checked

• Math Precision: the only arithmetic is the compile-time constant 1_000_000_000 * 10**18, which equals 1e27 and fits comfortably. No divisions, casts, scale mixing or decimal conversions exist. OZ's unchecked balance and supply updates are safe because every subtracted value is bounded by a checked balance read.
• Boundary: the token makes no external calls, has no payable, receive or fallback path, no sentinel branches beyond zero-address rejection, and decodes no bytes. Empty and garbage calldata and ether transfers all revert.
• Numerical Gap: a stateful fuzz over transfer, transferFrom and burn with six actors never broke the invariants that balances sum to total supply and that supply plus burned equals 1e27. Edge inputs of zero, one over balance, max uint, whole-balance self-transfers, and max and max-minus-one allowances all behave exactly as specified.
• Dependency integrity: all five vendored OpenZeppelin files are byte-identical to the upstream v5.1.0 release, so the reviewed arithmetic is the audited library's.
• Static analysis lead: the aderyn large-literal warning is the requested supply figure and is stylistic only.

One info-level note. The DECIMALS constant at src/SilentCat.sol:21 is documented as what decimals() returns, but decimals() is never overridden and simply returns OpenZeppelin's hard-coded 18. Both are 18 today, so nothing fails and the manifest agrees, but the supply scaling and the reported decimals come from two unrelated sources. A one-line override returning the constant would close the gap.

Coverage: all four verifier-listed entry points are marked holds, plus rows for the constructor supply, the sum-of-balances invariant, the boundary enumeration, the static-analysis lead and the vendored-library check. No proof file was needed since nothing rose to high or critical.

The review is complete and the findings file is written and validated.

Outcome: no access-control, trust-gap or asymmetry defect in Silent Cat. The token is OpenZeppelin v5.1.0 ERC20 with one addition, a self-only burn. Nothing of medium or higher severity.

What I verified

• The vendored OpenZeppelin files are byte-identical to upstream v5.1.0, so the inherited transfer, approve and allowance logic is the audited library code.
• The compiled ABI holds only the ERC-20 functions, five constants and burn. Storage is the five standard ERC20 slots. The runtime contains no CALL, CREATE, DELEGATECALL, CALLCODE or SELFDESTRUCT.
• The constructor takes no arguments and mints the exact supply once to msg.sender, so the factory receives it under the protected launch test.
• Nobody but a holder can move or reduce their balance. I tested that an infinite allowance grants no burn power and that the deployer cannot pull from a holder without allowance.
• No role, setter, fee formula or caller-class branch exists, so none of the trust-gap seams have two sides to interact.
• The aderyn large-numeric-literal lead is the brief's supply figure, asserted by tests. Dismissed.

One info-level note recorded. The brief asked for name, symbol and a supply minted once. The code adds a public burn the brief did not request, and after any burn the live total drops below the constant documented as "the fixed total supply". Reproduction: factory transfers 1 unit to a holder, holder burns it, totalSupply() is then one below TOTAL_SUPPLY(). This is a trust assumption and documentation mismatch, not a vulnerability.

Coverage: all four listed entry points have rows. Approve, transfer and transferFrom hold. Burn points to the info note. Five extra rows record the invariants checked, including a maintenance note that decimals() is not wired to the DECIMALS constant, though both return 18 today.

The scratch test under test/scratch/ passes and is not part of the submission. The findings JSON at the repository root holds one finding and nine coverage rows.

The review is complete and .imd-findings.json is written. The working tree holds only that file beyond the original commit.

Result: no reachable defect in the economics of Silent Cat. The token is an unmodified OpenZeppelin v5.1.0 ERC-20 plus a self-only burn. I checked it against the Economic Security, Invariant and Flow Gap guides and found nothing that moves value to the wrong party, shorts a launch flow, or lets the supply grow.

What I verified:

• Supply and minting. Exactly 1e27 minor units are minted once in the constructor to the caller, which is the factory under the launch. The ABI has no mint, owner, initializer or upgrade selector, and the runtime has no DELEGATECALL, CALLCODE or SELFDESTRUCT.
• Launch flows. No transfer override exists, so the distributor share, the pool seed and the remainder each arrive whole, and a claimant and a trader receive exactly what they are sent. A scratch test reproduced the 10/80/10 split and a PoolManager-style pull.
• Conservation invariant. A scratch Foundry invariant campaign over all four entry points from five actors never broke the rule that the sum of balances equals the total supply, which equals the initial supply minus burns.
• Burn. Only the caller's balance can be burned, so the factory, distributor or pool cannot be shrunk by anyone else. Supply can only fall.
• Vendored dependency. The ERC20, Context and interface files match upstream v5.1.0 line for line, so nothing in the library redirects msg.sender or alters accounting.

One info-level note was recorded. The constant DECIMALS scales the supply and its NatSpec says it is what decimals() returns, but decimals() is never overridden and returns OpenZeppelin's literal 18. Both are 18 today, so nothing fails on the shipped code. It is a latent coupling the author can close with a one-line override.

Coverage: all four listed entry points are marked holds, with four extra rows for the invariants and the dependency check. The static analysis lead about the large numeric literal was checked and is a style note only, since the literal is a correct compile-time constant. Scratch tests were removed after running.

The review is complete and .imd-findings.json is written. The working tree is otherwise unchanged apart from that file.

Outcome: no exploitable defect found. Silent Cat is a plain OpenZeppelin v5.1.0 ERC20 with a self-only burn, and all four state-changing entry points hold.

What I verified, by guide:

• Execution Trace. Constructor mints exactly 1e27 to the creator, which under CREATE2 from the factory is the factory, not the transaction origin. Transfers deliver the exact amount with no fee, exemption list or callback, so the distributor, pool-seed and swap flows move what they say. Insufficient balance, zero recipient and insufficient allowance each revert with the expected custom error. Infinite allowance is not decremented, as documented.
• Periphery. The vendored OpenZeppelin files are sha256-identical to upstream v5.1.0, so the only inherited code is the known base. The unchecked arithmetic in _update is bounded by the preceding checks.
• First Principles. No admin role, no mint path after the constructor, no receive or fallback, no DELEGATECALL, CALLCODE or SELFDESTRUCT. Unknown selectors and any ether revert. Burn can only shrink the caller's own balance.
• Static-analysis lead. The aderyn large-literal note on line 24 is the brief's supply written with separators. Style only.

One informational note recorded. The NatSpec on DECIMALS says it is what decimals() returns, but decimals() is OpenZeppelin's hard-coded 18 and never reads the constant. Today both are 18 and the supply is 1e27, so there is no runtime defect. Changing the constant would rescale the minted supply without changing decimals(), so I suggested overriding decimals() to return the constant. No proof file was attached since nothing reached high severity.

Checks run: forge build, the project's 31 tests, forge fmt --check, and a scratch suite of five tests covering the factory CREATE2 path, burn boundaries, the approve race, and ether or unknown-selector rejection. All passed. The scratch directory was removed afterwards.

Coverage rows: all four entry points holds, plus rows for the constructor supply invariant, the vendored base, the runtime surface, and the static-analysis lead.

Work is complete and verified. The full suite passes with the verifier's fuzz seed.

What I added (both under test/, nothing else touched):

• test/SilentCat.invariant.t.sol: a handler that drives the token with six actors (deployer, distributor, pool, requester, two holders) through transfer, approve, transferFrom and burn with bounded inputs, plus failure-path calls that must revert with the exact ERC-6093 error and leave state untouched (over-balance transfer, over-allowance and over-balance transferFrom, over-balance burn, zero-address receiver and spender, stranger pulls, twenty admin-shaped selectors, ether sends). Ghost books track per-actor inflows, outflows, burns and every allowance. Seven invariants check supply equals initial minus burned, supply never grows, sum of balances equals supply, each balance equals its net flows, allowances match the ghost mirror, zero address and the token itself hold nothing, and metadata is constant. Runs with fail-on-revert, 256 runs, depth 64, via inline config.
• test/SilentCatLaunchFlow.t.sol: a factory stand-in deploys the token with CREATE2 and pays out the swarm, pool and remainder legs in one transaction with exact-delivery assertions. Fuzz tests cover many claimants emptying the distributor with no dust, buy-then-sell-back round trips, allowance pulls, arbitrary supply splits, and random calldata never raising supply. Edge cases include burning the whole supply, one-wei burns, allowance surviving a burn, self-transferFrom needing a self-allowance, max-minus-one allowance decrementing, failed transferFrom not spending allowance, same-salt redeploy failing, and the constructor writing exactly four storage slots and reading nothing external.

Verification

Check	Result
forge build	ok
forge test with seed 0x456b…edd8	62 passed, 0 failed, 4 suites
Scratch mutant (skims 1 wei per transfer) against the handler	fails on the first call, so the suite is not vacuous

Finding reported in .imd-findings.json, severity info: the public self-only burn is a feature the brief did not request, so totalSupply() can drop below the stated one billion. It is not a launch defect since the supply can only shrink and nobody can burn another holder's balance. The tests assert the implemented behaviour rather than a constant supply. No correctness defect was found in the token.

The review is complete and .imd-findings.json is written at the repository root. The tree is otherwise unchanged (git status is clean, the scratch test was removed).

Outcome: no blocking defects. The Silent Cat token is an unmodified OpenZeppelin v5.1 ERC-20 with a no-argument constructor that mints exactly the manifest supply to the deployer, plus a self-only burn. All 68 project tests pass, including the launch-flow, invariant and opcode-scan suites, and my own scratch suite reproduced every specialist claim.

Specialist findings, judged:

• Merged into one info finding (reported by economics, flow and math): the DECIMALS constant is documented as what decimals() returns, but decimals() is never overridden and returns OpenZeppelin's literal 18. Both values are 18 today, so the manifest, supply and the floor's decimals check all agree. Kept as an informational documentation note with the counterfactual stated.
• Merged into one info finding (reported by permissions and the test writer): the public burn(uint256) was not in the brief and makes totalSupply() drop below the constant documented as the fixed supply. Reproduced: a holder burning one unit leaves the live supply one unit below the constant. Access control is correct, nobody can burn another holder's balance, and the floor tolerates a shrinking supply, so it is a scope and documentation note, not a defect.
• Dropped: the aderyn large-numeric-literal lead, since the literal is already underscore-separated and equals the brief's supply.

My own pass found nothing further. I checked the launch manifest against the schema rules, code sizes against the deployment limits, the runtime for forbidden opcodes via disassembly, allowance and transfer semantics, and the constructor's deployability under the factory's CREATE2 model. All four entry points are answered in the coverage record, with five extra invariant rows.