Shortcuts you invent, rules you write, gestures you own - all still just data

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

config/dot/hypr/shaders/protanopia.frag

@@ -0,0 +1,33 @@
+// Protanopia -- red-blind.
+//
+// Panama's accessibility color filters. Selected by the `colorFilter`
+// preference; hypr/looks.lua maps the enum to this path at config time and
+// services/SystemSettings.qml does the same live.
+//
+// The matrix is the feColorMatrix set the mock uses, which is the widely
+// carried HCIRN-derived one: it redistributes the red channel into the two the
+// eye can still separate, so a red/green pair that was one colour becomes two
+// distinguishable ones. It is a CORRECTION, not a simulation -- the point is to
+// make the screen readable, not to show what protanopia looks like.
+//
+// Row-major here, column-major to GLSL: mat3 takes its arguments column by
+// column, so the transpose below is the matrix as written in the SVG.
+
+#version 300 es
+
+precision mediump float;
+in vec2 v_texcoord;
+layout(location = 0) out vec4 fragColor;
+uniform sampler2D tex;
+
+const mat3 protanopia = mat3(
+    0.567, 0.558, 0.000,
+    0.433, 0.442, 0.242,
+    0.000, 0.000, 0.758
+);
+
+void main() {
+    vec4 pixColor = texture(tex, v_texcoord);
+
+    fragColor = vec4(clamp(protanopia * pixColor.rgb, 0.0, 1.0), pixColor.a);
+}