Add ISAC Skill Chips data module

docs/architecture.md

@@ -193,9 +193,27 @@ talent effects use `base × (1 + upgrades / 5)` for zero to five upgrades.
 Server actions validate all relationships and append the full owned graph to
 the existing `game_data` audit history.
 
+# Skill Chip quality scaling
+
+Skill Chip sets support Superior and High-end chip instances. Each set owns one
+2-piece bonus, distinct primary and secondary stat-option pools, and one
+3-piece talent with reusable trigger links and normalized effect rows. Primary
+and secondary options reference active attributes that define Skill Chip
+minimum and maximum roll values; a configured chip rolls one primary and two
+distinct secondary stats from those separate pools.
+
+Both set-bonus progression systems use the number of equipped High-end chips as
+the interpolation step. For `h` High-end chips, where `h` is zero through
+three, a configured minimum and maximum resolve as
+`minimum + (maximum − minimum) × h / 3`. Zero High-end chips therefore produce
+the minimum, while three produce the maximum. The editor stores only endpoints
+and previews all four states, preventing duplicated tier data from diverging.
+Skill Chip mutations, owned relationships, and safe icon metadata are captured
+in the `game_data` audit stream.
+
 # Game-data icon storage
 
-Talents, brand sets, and OS Protocols reference uploaded artwork through the
+Talents, brand sets, OS Protocols, and Skill Chips reference uploaded artwork through the
 polymorphic `game_data_icons` metadata table. Original uploads are never
 retained. The shared server pipeline accepts transparent SVG, PNG, WebP, and
 AVIF sources, rejects active or externally referenced SVG content, and uses