From b08415c7f87eb56ec09cd35fe0c72a6f04c731d2 Mon Sep 17 00:00:00 2001
From: Joey Yakimowich-Payne <jyapayne@pm.me>
Date: Tue, 21 Apr 2026 18:59:17 -0600
Subject: [PATCH] feat(chess/modifiers): add 3 recipes showcasing new trigger
 primitives (T26)
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Adds three recipes to the built-in template library, each built on a
Wave 2 trigger that previously had no pre-composed example:

- Kamikaze Knight — on-captured with target: attacker, nested
  add-to-attribute Hp -2. Death-rattle that damages whichever piece
  made the fatal capture.
- Berserker Pawn — on-move nested with add-to-attribute AttackBonus
  +1. Stacking rage: the pawn grows stronger with every move it
  survives.
- Promotion Feast — on-promotion nested with seed-attribute Hp 5.
  When a pawn finally promotes, it starts its new life with a fresh
  5 HP pool regardless of damage taken on the way up the board.

Each recipe passes validateCustomDescriptor and lands in the editors
Templates dropdown alongside the existing five. Recipe count: 5 → 8.
---
 .../chess/src/modifiers/custom/recipes.ts     | 123 ++++++++++++++----
 1 file changed, 98 insertions(+), 25 deletions(-)

diff --git a/packages/chess/src/modifiers/custom/recipes.ts b/packages/chess/src/modifiers/custom/recipes.ts
index 40c8b50..15907ed 100644
--- a/packages/chess/src/modifiers/custom/recipes.ts
+++ b/packages/chess/src/modifiers/custom/recipes.ts
@@ -129,29 +129,102 @@ export const CUSTOM_MODIFIER_RECIPES: readonly CustomModifierRecipe[] = [
       ],
     ),
   },
-  {
-    id: "recipe-low-hp-fortress",
-    title: "Low-HP Fortress (invulnerable when HP<2)",
-    summary:
-      "conditional: when Hp < 2, sets CANNOT_BE_CAPTURED. A last-stand trigger that keeps a wounded piece alive.",
-    descriptor: descriptorForRecipe(
-      "recipe-low-hp-fortress",
-      "Low-HP Fortress",
-      "Becomes untargetable when HP drops below 2.",
-      [
-        {
-          kind: "conditional",
-          params: {
-            condition: { type: "attr-lt", attr: "Hp", value: 2 },
-            then: [
-              {
-                kind: "set-capture-flag",
-                params: { flag: 2 },
-              },
-            ],
-          },
-        },
-      ],
-    ),
-  },
+   {
+     id: "recipe-low-hp-fortress",
+     title: "Low-HP Fortress (invulnerable when HP<2)",
+     summary:
+       "conditional: when Hp < 2, sets CANNOT_BE_CAPTURED. A last-stand trigger that keeps a wounded piece alive.",
+     descriptor: descriptorForRecipe(
+       "recipe-low-hp-fortress",
+       "Low-HP Fortress",
+       "Becomes untargetable when HP drops below 2.",
+       [
+         {
+           kind: "conditional",
+           params: {
+             condition: { type: "attr-lt", attr: "Hp", value: 2 },
+             then: [
+               {
+                 kind: "set-capture-flag",
+                 params: { flag: 2 },
+               },
+             ],
+           },
+         },
+       ],
+     ),
+   },
+   {
+     id: "recipe-kamikaze-knight",
+     title: "Kamikaze Knight (-2 HP to attacker)",
+     summary:
+       "on-captured wrapping add-to-attribute with target: 'attacker'. When captured, this piece deals 2 damage back to its slayer.",
+     descriptor: descriptorForRecipe(
+       "recipe-kamikaze-knight",
+       "Kamikaze Knight",
+       "Damages the attacker for 2 HP when captured, creating mutual wounds in exchanges.",
+       [
+         {
+           kind: "on-captured",
+           params: {
+             target: "attacker",
+             primitives: [
+               {
+                 kind: "add-to-attribute",
+                 params: { attr: "Hp", delta: -2 },
+               },
+             ],
+           },
+         },
+       ],
+     ),
+   },
+   {
+     id: "recipe-berserker-pawn",
+     title: "Berserker Pawn (+1 Attack per move)",
+     summary:
+       "on-move wrapping add-to-attribute AttackBonus +1. Gains +1 attack power every move, stacking into an unstoppable force.",
+     descriptor: descriptorForRecipe(
+       "recipe-berserker-pawn",
+       "Berserker Pawn",
+       "Gains +1 AttackBonus each move, creating an escalating threat the longer it advances.",
+       [
+         {
+           kind: "on-move",
+           params: {
+             primitives: [
+               {
+                 kind: "add-to-attribute",
+                 params: { attr: "AttackBonus", delta: 1 },
+               },
+             ],
+           },
+         },
+       ],
+     ),
+   },
+   {
+     id: "recipe-promotion-feast",
+     title: "Promotion Feast (+5 HP on promotion)",
+     summary:
+       "on-promotion wrapping seed-attribute for Hp 5. When this pawn promotes, it immediately gains 5 bonus HP as a reward.",
+     descriptor: descriptorForRecipe(
+       "recipe-promotion-feast",
+       "Promotion Feast",
+       "Seeds 5 HP when pawn promotes, rewarding safe advancement across the board.",
+       [
+         {
+           kind: "on-promotion",
+           params: {
+             primitives: [
+               {
+                 kind: "seed-attribute",
+                 params: { attr: "Hp", value: 5 },
+               },
+             ],
+           },
+         },
+       ],
+     ),
+   },
 ];