From ac5b07397919ef34abf7da03227c877baea39b97 Mon Sep 17 00:00:00 2001
From: Asaf Yishai <asaf@yishai.info>
Date: Sun, 4 Oct 2026 11:28:41 +0300
Subject: [PATCH 1/2] fix(autoclose): heal shorthand component props in
 streaming tails

---
 .../comark/src/internal/parse/auto-close/index.ts    |  9 +++++----
 packages/comark/test/streaming.test.ts               | 12 ++++++++++++
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/packages/comark/src/internal/parse/auto-close/index.ts b/packages/comark/src/internal/parse/auto-close/index.ts
index baaace55..be6c1e9e 100644
--- a/packages/comark/src/internal/parse/auto-close/index.ts
+++ b/packages/comark/src/internal/parse/auto-close/index.ts
@@ -144,7 +144,7 @@ export function autoCloseMarkdown(markdown: string, options: AutoCloseOptions =
 
   if (doc.fmOpen && doc.fmContent) result = closeDelimiterLine(result, '-', 3)
 
-  if (o.syntax) result = closeComponents(result, source, doc.comps)
+  if (o.syntax) result = closeComponents(result, source, doc.comps, doc.start >= 0)
 
   return result
 }
@@ -828,11 +828,12 @@ function closeDelimiterLine(text: string, ch: string, width: number): string {
 }
 
 /** Closes an open props brace and every open component fence, innermost first. */
-function closeComponents(result: string, source: string, comps: Component[]): string {
-  if (!source.includes('::')) return result
+function closeComponents(result: string, source: string, comps: Component[], healShorthand: boolean): string {
+  const lineStart = result.lastIndexOf('\n') + 1
+  const shorthand = healShorthand && /^:[a-z$][\w$-]*\{/i.test(result.slice(lineStart).trimStart())
+  if (!source.includes('::') && !shorthand) return result
 
   // `::alert{type="info` → close the quote and the brace.
-  const lineStart = result.lastIndexOf('\n') + 1
   let brace = -1
   for (let i = result.length - 1; i >= lineStart; i--) {
     const c = result.charCodeAt(i)
diff --git a/packages/comark/test/streaming.test.ts b/packages/comark/test/streaming.test.ts
index 2557683d..dff0b528 100644
--- a/packages/comark/test/streaming.test.ts
+++ b/packages/comark/test/streaming.test.ts
@@ -230,6 +230,18 @@ describe('streaming mode', () => {
   })
 
   describe('streaming with MDC components', () => {
+    it('closes quoted attributes after reusing a completed component', async () => {
+      const parse = createMarkdownParser()
+      const source = '::note\nContent\n::\n\n:button{label="'
+      await parse(source, { streaming: true })
+
+      const partial = await parse(source + 'Review', { streaming: true })
+      expect(partial.nodes[1]).toMatchObject(['button', { label: 'Review' }])
+
+      const completed = await parse(source + 'Review"}')
+      expect(completed.nodes[1]).toMatchObject(['button', { label: 'Review' }])
+    })
+
     it('parses MDC block components in streaming mode', async () => {
       const parse = createMarkdownParser()
 

From d20ff2c03b9191e03ca535516e6bd8d33fb7bf1f Mon Sep 17 00:00:00 2001
From: Farnabaz <farnabaz@gmail.com>
Date: Thu, 8 Oct 2026 15:27:13 +0200
Subject: [PATCH 2/2] chore: update test

---
 packages/comark/test/streaming.test.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/comark/test/streaming.test.ts b/packages/comark/test/streaming.test.ts
index dff0b528..06b9a211 100644
--- a/packages/comark/test/streaming.test.ts
+++ b/packages/comark/test/streaming.test.ts
@@ -233,7 +233,8 @@ describe('streaming mode', () => {
     it('closes quoted attributes after reusing a completed component', async () => {
       const parse = createMarkdownParser()
       const source = '::note\nContent\n::\n\n:button{label="'
-      await parse(source, { streaming: true })
+      const partial0 = await parse(source, { streaming: true })
+      expect(partial0.nodes[1]).toMatchObject(['button', { label: '' }])
 
       const partial = await parse(source + 'Review', { streaming: true })
       expect(partial.nodes[1]).toMatchObject(['button', { label: 'Review' }])