passages: swept tube evaluates the exact route on in-bound cache misses (L100, v216)

L99 treated a missing exact-grid sweep sample as "no route here", so off-grid queries exposed the
FI/TN boundary band inside passage 1-2 (flat ceiling/floor). In-bound misses now evaluate the
exact route; a conservative route-feature bound still skips out-of-extent misses. Composition
order unchanged (graph -> bands -> passage -> stamps -> floor caps).
Comparison now counts added/removed crossings and triangles: 0/0 crossings on all four strates
(FI +56 triangles). 1-2 mid-tunnel: L98->L100 changes 32k px (L99 changed 1.14M).
Near-ready @W12 (L98/L99/L100): FI 2.62/1.78/2.05, TN 2.36/1.55/1.80, SW 1.17/0.95/1.04,
VS 1.16/1.03/1.08 s. All walk audits pass; 24/24 Clang/GCC W1/W8/W12 determinism; fast tier PASS.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1

Standalone/Research/WorldAssemblerM3/Linux100/captures/INDEX.md

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+# L100 passage captures
+
+Each route has paired L98 and L100 views at both mouths and at 25%, 50%, and 75% stations. The camera gate decodes each PNG and requires visible geometry (>3,000 pixels after excluding the dominant background color, with at least two RGB colors). Changed pixels count RGB pixels with any channel difference between a matched pair.
+
+L100 source stamp: `7224bf6e668d06ed71a92f0857820e3ae2b0eca40574a491331ab5979a88f698`.
+
+| View | L98 geometry px | L100 geometry px | Changed px | Images |
+|---|---:|---:|---:|---|
+| `0-1 · upper-mouth` | 1,063,522 | 1,063,522 | 41,441 | [L98](passage-0-1-0-upper-mouth-before-l98.png) / [L100](passage-0-1-0-upper-mouth-after-l100.png) |
+| `0-1 · lower-mouth` | 1,420,316 | 1,420,316 | 23,644 | [L98](passage-0-1-0-lower-mouth-before-l98.png) / [L100](passage-0-1-0-lower-mouth-after-l100.png) |
+| `0-1 · mid-25 (27.5%); station +50 m to surface; surface-target fallback` | 422,920 | 422,935 | 706 | [L98](passage-0-1-0-mid-25-before-l98.png) / [L100](passage-0-1-0-mid-25-after-l100.png) |
+| `0-1 · mid-50 (50.0%)` | 1,375,241 | 1,375,118 | 20,082 | [L98](passage-0-1-0-mid-50-before-l98.png) / [L100](passage-0-1-0-mid-50-after-l100.png) |
+| `0-1 · mid-75 (75.0%)` | 1,368,802 | 1,368,801 | 12,919 | [L98](passage-0-1-0-mid-75-before-l98.png) / [L100](passage-0-1-0-mid-75-after-l100.png) |
+| `1-2 · upper-mouth` | 1,425,620 | 1,426,619 | 292,188 | [L98](passage-1-2-0-upper-mouth-before-l98.png) / [L100](passage-1-2-0-upper-mouth-after-l100.png) |
+| `1-2 · lower-mouth` | 223,508 | 223,508 | 57,795 | [L98](passage-1-2-0-lower-mouth-before-l98.png) / [L100](passage-1-2-0-lower-mouth-after-l100.png) |
+| `1-2 · mid-25 (25.0%)` | 1,409,914 | 1,409,907 | 15,713 | [L98](passage-1-2-0-mid-25-before-l98.png) / [L100](passage-1-2-0-mid-25-after-l100.png) |
+| `1-2 · mid-50 (50.0%)` | 1,407,415 | 1,407,415 | 32,217 | [L98](passage-1-2-0-mid-50-before-l98.png) / [L100](passage-1-2-0-mid-50-after-l100.png) |
+| `1-2 · mid-75 (75.0%)` | 1,261,589 | 1,264,705 | 263,048 | [L98](passage-1-2-0-mid-75-before-l98.png) / [L100](passage-1-2-0-mid-75-after-l100.png) |
+| `2-3 · upper-mouth` | 60,506 | 60,506 | 0 | [L98](passage-2-3-0-upper-mouth-before-l98.png) / [L100](passage-2-3-0-upper-mouth-after-l100.png) |
+| `2-3 · lower-mouth` | 60,257 | 60,257 | 0 | [L98](passage-2-3-0-lower-mouth-before-l98.png) / [L100](passage-2-3-0-lower-mouth-after-l100.png) |
+| `2-3 · mid-25 (25.0%); surface-target fallback` | 631,345 | 631,345 | 0 | [L98](passage-2-3-0-mid-25-before-l98.png) / [L100](passage-2-3-0-mid-25-after-l100.png) |
+| `2-3 · mid-50 (50.0%); surface-target fallback` | 629,698 | 629,698 | 4,208 | [L98](passage-2-3-0-mid-50-before-l98.png) / [L100](passage-2-3-0-mid-50-after-l100.png) |
+| `2-3 · mid-75 (75.0%)` | 1,163,903 | 1,163,903 | 0 | [L98](passage-2-3-0-mid-75-before-l98.png) / [L100](passage-2-3-0-mid-75-after-l100.png) |
+
+## Same-camera 1–2 regression check
+
+The L99 and L100 midpoint records have identical focus, camera, target, yaw, and pitch. This three-version check decodes every image and passes the same geometry gate.
+
+| Version | Image | Visible geometry px | Changed px from L98 |
+|---|---|---:|---:|
+| L98 | [before](../../Linux99/captures/passage-1-2-0-mid-tunnel-before-l98.png) | 1,407,415 | — |
+| L99 | [flat-tunnel capture](../../Linux99/captures/passage-1-2-0-mid-tunnel-after-l99.png) | 1,206,362 | 1,135,959 |
+| L100 | [fixed capture](passage-1-2-0-mid-50-after-l100.png) | 1,407,415 | 32,217 |
+
+L99→L100 changed 1,134,150 pixels. The L100 view returns to the L98 image at this camera (L98→L100: 32,217).
+
+All 30 L98/L100 PNGs passed the geometry gate. Capture logs, camera coordinates, exports, and raw metadata are under `Saved/Linux/l100/captures/`.