docs: strip editorial language from CAPTURE.md

docs/CAPTURE.md

@@ -1,41 +1,26 @@
 # Capture
 
-Client-side. Phone and PC. This is the hard part of Slice 1.
+Runs in the browser on phone and PC.
 
-## Goal
+## Output
 
-Isolate just the slab, with quick visual feedback, then produce:
+From one approved reference photo:
 
-1. A uniform inventory PNG for the product page
+- Inventory PNG: transparent, 3:4, slab centered, 80% fill at extremes, shorter side at least 1600px when the source allows
-2. Filterable sizes and board feet from that **reference** photo
+- Widths (min, max, avg) sampled every 6 in along the length axis
-
-The user’s eye on the overlay is the quality gate. There is no confidence score on the mask.
-
-## Controls (Slice 1)
-
-- Sheet: Auto / Green / Black, only if the background is not obvious
-- **One** sensitivity slider
-- Overlay on the **source** photo, live as the slider moves
-- No Apply button, no server round-trip to tune the cut
-
-If the edge is still wrong after the slider, retake. Extra sliders (edge offset, feather, and so on) are a fallback after real slabs prove one control is not enough. Do not ship four sliders up front.
-
-## After the user approves the edge
-
-Then — and only then — run the rest on the client:
-
-- Length axis from the mask; user can rotate / confirm if it is skewed
-- User length `L` (inches, 1/8") is the scale: `scale = longest_axis_px / L`
-- Width samples every 6" along that axis (min / max / avg for the listing, not for bdft)
 - `sqft = (mask_pixels / scale²) / 144` (2 decimals)
-- `bdft = sqft × thickness_in` (2 decimals). Identity: 1 sqft at 1" = 1 bdft
+- `bdft = sqft × thickness_in` (2 decimals)
-- Inventory PNG: transparent, 3:4 portrait, slab centered, 80% fill at the extremes, shorter side ≥ 1600px when the source allows
-- Undersized source: warn and require retake
 
-User-entered length, thickness, SKU, and price always win over computed values.
+`scale = longest_axis_px / L` where `L` is user length in inches (1/8 in steps).
 
-## Proof for this file
+## Controls
 
-On a real phone, after Approve, the processed PNG and the numbers appear. If Approve does nothing, capture is not done.
+- Sheet: Auto, Green, or Black
+- Sensitivity: one slider
+- Overlay on the source photo, updated as the slider moves
 
-Algorithm detail and test vectors: `docs/archive/TECH-SPEC-PIPELINE.md` (history). Live behavior is this file.
+User approves the edge, then the PNG and measurements run.
+
+Length axis comes from the mask. User may rotate it. Thickness is a user 1/8 in pick.
+
+Source below the PNG size floor requires a new photo.