From 1ea434e9a7073275519b7c87642b6cd397aea9d0 Mon Sep 17 00:00:00 2001
From: Kenneth Reitz <me@kennethreitz.org>
Date: Mon, 8 Jun 2026 03:23:48 -0400
Subject: [PATCH] Brightness as a continuous rhyme-strength gradient
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The fill (and tail underline) now scale through a per-group strength
from the founding key: perfect 1.0, multisyllabic .82, consonant-
backed .7, vowel slant .6, consonance .55, weak ending .5. So the
page reads rhyme quality as a smooth brightness ramp, not just
perfect-vs-slant — the feature, deepened.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 app.py            | 9 ++++++++-
 static/index.html | 5 +++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/app.py b/app.py
index e280712..17d8162 100644
--- a/app.py
+++ b/app.py
@@ -1258,8 +1258,15 @@ def analyze(draft: Draft):
         usage[color] += 1
         chosen.append(color)
         sound = re.sub(r"^[a-z0-9]+:", "", g["key"]).replace("|", " ").lower()
+        k = g["key"]
+        strength = (1.0 if k.startswith("p:")        # perfect rime
+                    else 0.82 if k.startswith("m:")   # multisyllabic run
+                    else 0.7 if k.startswith("m2:")   # consonant-backed
+                    else 0.6 if k.startswith("v:")    # vowel slant
+                    else 0.55 if k.startswith("c:")   # consonance
+                    else 0.5)                          # weak ending
         groups_out.append({"id": gid, "color": color, "slant": g["slant"],
-                           "sound": sound})
+                           "sound": sound, "strength": round(strength, 2)})
 
     # stanza rhyme schemes from line-ending groups: the token covering
     # the most of the line's tail owns the slot — Em rhymes "-cock it",
diff --git a/static/index.html b/static/index.html
index a1a0342..2b8a0b2 100644
--- a/static/index.html
+++ b/static/index.html
@@ -636,7 +636,8 @@ function render(){
                   : (p && (focusGid === null || p.g === focusGid)) ? p
                   : (w || p);
           let alpha = !t.ph ? (t.end ? 34 : 19) : (t.end ? 24 : 14);
-          if(t.slant) alpha = Math.round(alpha * 0.62);  // slant sits back
+          const str = (groupInfo[t.g] && groupInfo[t.g].strength) || 1;
+          alpha = Math.round(alpha * (0.45 + 0.55 * str));  // brightness = rhyme strength
           if(focusGid !== null && t.g === focusGid){
             alpha = Math.min(85, Math.round(alpha * 2.8));
             style += 'color:#1a120c;font-weight:600;';  // dark ink on the lit chip
@@ -645,7 +646,7 @@ function render(){
           // faint underline on the rhyming tail (rs..e) of a word — a
           // whisper of precision under the full-word fill
           if(w && w.rs != null && a >= w.rs){
-            const u = w.slant ? 28 : 42;
+            const u = Math.round(42 * ((groupInfo[w.g] && groupInfo[w.g].strength) || 1));
             shadows.push(`inset 0 -1.5px 0 0 color-mix(in srgb, ${colorOf(w)} ${u}%, transparent)`);
           }
         }else if(op){