From c7d8ca7a75355cbbc3b1caf9a6dbe6284f5c928c Mon Sep 17 00:00:00 2001
From: Jeremy Fiel <32110157+jeremyfiel@users.noreply.github.com>
Date: Thu, 12 Oct 2023 15:02:20 +0000
Subject: [PATCH] fix(types): update unevaluatedItems type defintion

Per JSON Schema 2019-09+ spec. this annotation keyword
can be any valid JSON Schema schema. e.g. `boolean` or `schema`
https://json-schema.org/draft/2019-09/json-schema-core#unevaluatedItems

partially fixes #1233
---
 .changeset/slow-lemons-accept.md    | 6 ++++++
 packages/core/src/types/asyncapi.ts | 8 +++++++-
 packages/core/src/types/oas3_1.ts   | 8 +++++++-
 3 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/slow-lemons-accept.md

diff --git a/.changeset/slow-lemons-accept.md b/.changeset/slow-lemons-accept.md
new file mode 100644
index 000000000..09ef626d4
--- /dev/null
+++ b/.changeset/slow-lemons-accept.md
@@ -0,0 +1,6 @@
+---
+'@redocly/cli': major
+'@redocly/openapi-core': major
+---
+
+fix(types): update `unevaluatedItems` type definition to resolve either boolean or object schema per JSON Schema 2019-09 specification
diff --git a/packages/core/src/types/asyncapi.ts b/packages/core/src/types/asyncapi.ts
index 2fb74314f..3dec98618 100644
--- a/packages/core/src/types/asyncapi.ts
+++ b/packages/core/src/types/asyncapi.ts
@@ -390,7 +390,13 @@ const Schema: NodeType = {
     maxContains: { type: 'integer', minimum: 0 },
     patternProperties: { type: 'object' },
     propertyNames: 'Schema',
-    unevaluatedItems: 'Schema',
+    unevaluatedItems: (value: unknown) => {
+      if (typeof value === 'boolean') {
+        return { type: 'boolean' };
+      } else {
+        return 'Schema';
+      }
+    },
     unevaluatedProperties: (value: unknown) => {
       if (typeof value === 'boolean') {
         return { type: 'boolean' };
diff --git a/packages/core/src/types/oas3_1.ts b/packages/core/src/types/oas3_1.ts
index 4a8a49efd..d9f8adffe 100755
--- a/packages/core/src/types/oas3_1.ts
+++ b/packages/core/src/types/oas3_1.ts
@@ -137,7 +137,13 @@ const Schema: NodeType = {
     maxContains: { type: 'integer', minimum: 0 },
     patternProperties: { type: 'object' },
     propertyNames: 'Schema',
-    unevaluatedItems: 'Schema',
+    unevaluatedItems: (value: unknown) => {
+      if (typeof value === 'boolean') {
+        return { type: 'boolean' };
+      } else {
+        return 'Schema';
+      }
+    },
     unevaluatedProperties: (value: unknown) => {
       if (typeof value === 'boolean') {
         return { type: 'boolean' };