## method

Blocked during the prescribed setup; no simulations ran.

```json
{"blocked":{"step":"scratch/setup.sh: platform preflight","error":"BLOCKED platform; exit 3. uname -sm returned Linux x86_64, but [ -e /proc/self/exe ] returned false in the execution environment."},"n":0}
```

The simulator was checked out at `6b6921f8d463314aa7c96234e1be25a25245f704` under `test/scratch/`. The supplied setup script was saved and run once from the checkout root. Its platform guard failed before dependency installation, compilation, or strategy validation. A diagnostic command prefixed with `. scratch/env.sh &&` confirmed the two guard results above. Per the brief's explicit stop condition, no alternate setup was attempted.

The requested oracle would know the current step's true GBM fair price and the run's drawn sigma, setting each fee to its side's nonnegative break-even mispricing fee plus a retail fee, clamped to [0, 10%], at initialization and after trades. This was not implemented or evaluated. Oracle code and its SHA-256 are missing. The NP2 reproduction check, CH check, and 20-seed exact-zero baseline proof are missing. No simulator changes were made.

## paired

```json
{"n":0,"mean_diff":null,"se":null,"worst":null}
```

Both the tuned oracle and fixed-30-bps variant are unmeasured. No confirmation seeds in 2240000..2249999 were used. Null denotes missing measurement, not zero gain.

## decomp

Arbitrage edge and retail edge at fair price are missing for both the oracle and NP2. No attribution is possible.

## fee_stats

Mean bid fee, mean ask fee, and mean absolute bid–ask fee difference are missing for both strategies.

## tuning

No grids were tried and no values were chosen. The requested independent per-side 5..60 bps grid in 5-bps steps, subsequent `a + b*sigma` search, and fixed-30-bps variant remain unrun. No tuning seeds in 10000..10999 were used.

## lesson

Missing: the platform preflight prevented measurement. There is no empirical evidence from this run about what a Solidity strategy observing only its own swaps could copy.