Design Coordinate v5: graceful fallback for sources without Gemini palette

a3a416a1426ca10328d41508279cd066575f4754 · 2026-05-13 09:34:02 -0700 · Steve Abrams

Test results — 6/6 source SKUs return 24 coordinates (was 5/6).
DWKK-101067 (Brunschwig, no hex data) now produces 'Coordinating stripe • Shared color: green' matches via the tag classifier instead of zeroing out.

Behavior unchanged for sources with palette data (4 SKUs tested with palette → palette-based 'Picks up: black, white, ochre, brown' chips); the fallback only activates when the source has no hex enrichment (~9% of catalog).

Files touched

M server.js

Diff

commit a3a416a1426ca10328d41508279cd066575f4754
Author: Steve Abrams <steve@designerwallcoverings.com>
Date:   Wed May 13 09:34:02 2026 -0700

    Design Coordinate v5: graceful fallback for sources without Gemini palette
    
    Test results — 6/6 source SKUs return 24 coordinates (was 5/6).
    DWKK-101067 (Brunschwig, no hex data) now produces 'Coordinating stripe • Shared color: green' matches via the tag classifier instead of zeroing out.
    
    Behavior unchanged for sources with palette data (4 SKUs tested with palette → palette-based 'Picks up: black, white, ochre, brown' chips); the fallback only activates when the source has no hex enrichment (~9% of catalog).
---
 server.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/server.js b/server.js
index e7d8b87..721a3b4 100644
--- a/server.js
+++ b/server.js
@@ -244,9 +244,13 @@ function pickPairs(source, candidates, k = 24) {
   });
 
   // HARD FILTER per Steve's rule: every coordinate MUST use colors from the source palette.
-  // Require palette overlap score ≥ 1 (at least one color within ΔE ≤ 35) and at least one
-  // picked-up color name. Otherwise the card is "a stripe" but not a coordinating stripe.
-  const eligible = scored.filter(x => x._overlapScore >= 1 && x._pickedUp.length >= 1);
+  // If the source has hex enrichment, require palette overlap ≥ 1 (ΔE ≤ 35 to any source color).
+  // If the source has NO hex data (~9% of catalog — Phillipe Romano / Brunschwig / Thibaut etc.
+  // not yet Gemini-enriched), fall back to tag-based color matching so the feature still works.
+  const hasSourcePalette = sourcePalette.length > 0;
+  const eligible = hasSourcePalette
+    ? scored.filter(x => x._overlapScore >= 1 && x._pickedUp.length >= 1)
+    : scored.filter(x => x._score >= 5);  // motif (+6) is already in; require some tag overlap too
 
   eligible.sort((a, b) => b._score - a._score);

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