# Linux111 report

## Design

Version 218 resamples passage controls with a centripetal Catmull–Rom curve at about 1 m spacing (310 control spans became 2,790 prepared segments). Open-air shells use a 0.75 m floor slab and side walls up to 1.0 m above the floor; there is no roof. Passage interior remains higher priority than shell. The second design constrained the floor route to a 14.5° grade ceiling.

The per-tile candidate lists were not measured. The 310→2,790 figures are prepared route segment counts, not tile candidate list sizes.

## Speed

L109 medians below are the candidate column from the saved five-pair timing matrix. L111 timing was not run after the audits failed.

| Stratum | L109 W8 near-ready (s) | L109 W12 near-ready (s) | L111 W8/W12 |
|---|---:|---:|---|
| SurfaceWorld | 0.737 | 0.761 | Not run |
| FloatingIslands | 0.911 | 0.863 | Not run |
| TunnelNetwork | 0.956 | 0.895 | Not run |
| VerticalShafts | 0.789 | 0.738 | Not run |

## Audits

- Clang standalone build completed. The second design removed all grade failures. Passage 0–1 still had 2 unsupported walk samples; passages 1–2 and 2–3 passed. The combined resolved-passage audit failed.
- Mouth-profile audits passed 3/3. Naturalness and ripple audits passed 2/3.
- The half-pipe shell audit passed 2/3; passage 0–1 reported 11,544 floor and 6,945 wall violations. A targeted trace showed at least one reported floor sample was 0.101 m inside the passage after relief, where interior correctly overrides the shell. The audit's smooth-route overlap model still disagreed at that point, so the remaining shell counts are not conclusive.
- Fast tier, Clang/GCC W1/W8/W12 hash matrix, readiness timing, and Unreal Linux build were not run. Canonical v218 hashes were not generated.

## Captures

No Linux111 capture images were generated. Mouths, 25/50/75% stations, open-air sections, and programmatically verified 4 m outside/interior close-ups remain outstanding.

The candidate audit found these open-air sections:

- passage 0–1: 6.408–16.782 m; 19.500–24.439 m; 1,044.046–1,498.708 m
- passage 1–2: 81.654–85.646 m; 104.092–104.829 m
- passage 2–3: 7.701–26.008 m; 372.697–377.363 m

## Failed attempts

1. Dense spline plus half-pipe: walk grades exceeded 15° and passage 0–1 failed shell, naturalness, and ripple checks.
2. Dense spline plus a grade-limited floor: grade failures cleared, but passage 0–1 retained 2 unsupported walk samples and its shell/naturalness/ripple audits still failed. Work stopped after this second design as requested.

Logs: `Saved/Linux/l111/build-clang.log` and `Saved/Linux/l111/audit-owner.log`.