From 538dadbdc75e4d104822d9b600439e2d5f6822f9 Mon Sep 17 00:00:00 2001
From: unnoq <contact@unnoq.com>
Date: Thu, 31 Jul 2025 10:19:06 +0700
Subject: [PATCH 1/2] fix(json-schema): enhance array to map coercion to handle
 unique keys

---
 apps/content/docs/openapi/plugins/smart-coercion.md | 2 +-
 packages/json-schema/src/coercer.test.ts            | 5 +++++
 packages/json-schema/src/coercer.ts                 | 8 +++++++-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/apps/content/docs/openapi/plugins/smart-coercion.md b/apps/content/docs/openapi/plugins/smart-coercion.md
index 24a78d11e..16cee3b62 100644
--- a/apps/content/docs/openapi/plugins/smart-coercion.md
+++ b/apps/content/docs/openapi/plugins/smart-coercion.md
@@ -150,6 +150,6 @@ This is particularly useful for [Bracket Notation](/docs/openapi/bracket-notatio
 
 ### Array → Map
 
-Support arrays of key-value pairs:
+Support arrays of key-value pairs with **unique keys**:
 
 - `[['key1', 'value1'], ['key2', 'value2']]` → `new Map([['key1', 'value1'], ['key2', 'value2']])`
diff --git a/packages/json-schema/src/coercer.test.ts b/packages/json-schema/src/coercer.test.ts
index 3e320cd20..afb8dd5d7 100644
--- a/packages/json-schema/src/coercer.test.ts
+++ b/packages/json-schema/src/coercer.test.ts
@@ -75,6 +75,11 @@ describe('jsonSchemaCoercer', () => {
       { 'type': 'array', 'items': { type: 'array', prefixItems: [{ type: 'number' }, { type: 'boolean' }] }, 'x-native-type': 'map' } as any,
       ['1'],
     )).toEqual(['1'])
+
+    expect(coercer.coerce(
+      { 'type': 'array', 'items': { type: 'array', prefixItems: [{ type: 'number' }, { type: 'boolean' }] }, 'x-native-type': 'map' } as any,
+      [['1', 'true'], ['duplicate', 'false'], ['duplicate', 'true']],
+    )).toEqual([[1, true], ['duplicate', false], ['duplicate', true]])
   })
 
   it('can coerce enum/const values', () => {
diff --git a/packages/json-schema/src/coercer.ts b/packages/json-schema/src/coercer.ts
index f3c5f3b43..b21e58f7c 100644
--- a/packages/json-schema/src/coercer.ts
+++ b/packages/json-schema/src/coercer.ts
@@ -419,6 +419,12 @@ export class experimental_JsonSchemaCoercer {
       return value
     }
 
-    return new Map(value as [unknown, unknown][])
+    const result = new Map(value as [unknown, unknown][])
+
+    if (result.size !== value.length) {
+      return value
+    }
+
+    return result
   }
 }

From e70f80e8ddc160c1c68c627262ddc456f1475334 Mon Sep 17 00:00:00 2001
From: unnoq <contact@unnoq.com>
Date: Thu, 31 Jul 2025 11:22:16 +0700
Subject: [PATCH 2/2] Update packages/json-schema/src/coercer.test.ts

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
---
 packages/json-schema/src/coercer.test.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/json-schema/src/coercer.test.ts b/packages/json-schema/src/coercer.test.ts
index afb8dd5d7..f6a5b205a 100644
--- a/packages/json-schema/src/coercer.test.ts
+++ b/packages/json-schema/src/coercer.test.ts
@@ -78,8 +78,8 @@ describe('jsonSchemaCoercer', () => {
 
     expect(coercer.coerce(
       { 'type': 'array', 'items': { type: 'array', prefixItems: [{ type: 'number' }, { type: 'boolean' }] }, 'x-native-type': 'map' } as any,
-      [['1', 'true'], ['duplicate', 'false'], ['duplicate', 'true']],
-    )).toEqual([[1, true], ['duplicate', false], ['duplicate', true]])
+      [['1', 'true'], ['2', 'false'], ['1', 'false']],
+    )).toEqual([[1, true], [2, false], [1, false]])
   })
 
   it('can coerce enum/const values', () => {