# B3 confirmation: blocked at setup

```json
{"blocked":{"step":"sh scratch/setup.sh: line 6, uv venv --python 3.12 .venv","error":"exit 126: scratch/bin/uv: cannot execute binary file"}}
```

The prescribed setup script was saved and run exactly once from the checkout root. Its Linux x86_64 executable could not run on the available Darwin arm64 runtime. Per the brief's setup-failure rule, work stopped at this failure. No engine results are claimed.

| Setup check | Observed result |
|---|---|
| Runtime (`uname -s -m`) | `Darwin arm64` |
| Checkout | Cloned the specified amm-challenge repository into `test/scratch/amm-challenge`; all setup files remained under the explicitly permitted `test/scratch/` tree. |
| Revision (`git rev-parse HEAD`) | `6b6921f8d463314aa7c96234e1be25a25245f704` |
| Setup invocation | `sh scratch/setup.sh`, once, exit 126 |
| Engine wheel download | Completed |
| Engine wheel SHA-256 | Check reported `OK` for the prescribed `aedb68280aca34c110968f00148387c95885207913fb2cf19a1ab4c5cfd6887a` digest. |
| First failing operation | `uv venv --python 3.12 .venv` |
| Error | `scratch/bin/uv: cannot execute binary file` (setup line 6; path shortened) |
| Package installation / compiler installation | Not reached |
| StarterStrategy validation | Not reached |

Evidence for the setup table is the local setup process output and revision check, not an external performance claim. No external source passages were relied on; `sources.json` therefore contains an empty list.

## Validation and deployed bytes

Port-3 extraction and SHA-256 verification were not reached. No `amm-match validate` line or deployed-byte count is available for port-3. The t03 and IB artifacts were not extracted or compiled.

## Engine results

No strategy was run on any seed. In particular, every reserved seed in the inclusive range `9601536..9601791` remains unused by this attempt. There were no reruns or tuning.

| Strategy | Mean edge | afterSwap calls | oog | Peak gas | Mean gas |
|---|---|---|---|---|---|
| port-3 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
| t03 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
| IB | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |

`amm_sim_rs.gas_stats()` was not called because setup failed before the engine could be installed.

| Paired comparison | n observed | mean_diff | se | worst5 (seed, diff) | wins |
|---|---|---|---|---|---|
| port-3 minus t03 | 0 | Unavailable | Unavailable | Unavailable | Unavailable |
| port-3 minus IB | 0 | Unavailable | Unavailable | Unavailable | Unavailable |

No per-seed CSV is supplied: there are no measured values to populate the required 256 rows. Zeroes or synthetic measurements would misrepresent the failed run.

## Problems

The required Linux setup cannot execute on this runtime. This is a runtime failure, not missing requester input; no `.imd-blocked.json` input request was created. Confirmation remains incomplete and requires a compatible Linux x86_64 runtime with the prescribed setup. The only deliverables are this report and `sources.json`; temporary checkout and setup files are under `test/scratch/`, which the brief excludes from submission.