From dd363175f079a3559a0d4ebccc5d4f674c80702a Mon Sep 17 00:00:00 2001
From: Mark Probst <mark.probst@gmail.com>
Date: Tue, 1 Sep 2026 19:04:59 +0000
Subject: [PATCH] fix(pike): validate array cardinality

---
 .../quicktype-core/src/language/Pike/PikeRenderer.ts  | 11 +++++++++++
 test/languages.ts                                     |  1 +
 2 files changed, 12 insertions(+)

diff --git a/packages/quicktype-core/src/language/Pike/PikeRenderer.ts b/packages/quicktype-core/src/language/Pike/PikeRenderer.ts
index 95e6d78ee7..c815f3fa51 100644
--- a/packages/quicktype-core/src/language/Pike/PikeRenderer.ts
+++ b/packages/quicktype-core/src/language/Pike/PikeRenderer.ts
@@ -3,6 +3,7 @@ import {
     type ForbiddenWordsInfo,
 } from "../../ConvenienceRenderer.js";
 import {
+    minMaxItemsForType,
     minMaxLengthForType,
     minMaxValueForType,
 } from "../../attributes/Constraints.js";
@@ -348,6 +349,16 @@ export class PikeRenderer extends ConvenienceRenderer {
                         this.emitLine(
                             `if (${optionalGuard}sizeof(${jsonValue}) > ${maxLength}) error("String too long");`,
                         );
+                    const [minItems, maxItems] =
+                        minMaxItemsForType(p.type) ?? [];
+                    if (minItems !== undefined)
+                        this.emitLine(
+                            `if (${optionalGuard}sizeof(${jsonValue}) < ${minItems}) error("Array too short");`,
+                        );
+                    if (maxItems !== undefined)
+                        this.emitLine(
+                            `if (${optionalGuard}sizeof(${jsonValue}) > ${maxItems}) error("Array too long");`,
+                        );
                     const rejectsArray =
                         p.type instanceof UnionType &&
                         nullableFromUnion(p.type) === null &&
diff --git a/test/languages.ts b/test/languages.ts
index e7fdedae0d..e10b25688c 100644
--- a/test/languages.ts
+++ b/test/languages.ts
@@ -1499,6 +1499,7 @@ export const PikeLanguage: Language = {
         "minmax",
         "minmaxInteger",
         "minmaxlength",
+        "minmaxitems",
     ],
     output: "TopLevel.pmod",
     topLevel: "TopLevel",