fix: support CRLF SSE frame parsing (#223)

src/cli/transports/SSETransport.ts

@@ -63,11 +63,15 @@ export function parseSSEFrames(buffer: string): {
   const frames: SSEFrame[] = []
   let pos = 0
 
-  // SSE frames are delimited by double newlines
-  let idx: number
-  while ((idx = buffer.indexOf('\n\n', pos)) !== -1) {
-    const rawFrame = buffer.slice(pos, idx)
-    pos = idx + 2
+  // SSE frames are delimited by an empty line. Support LF and CRLF streams.
+  const frameDelimiter = /\r?\n\r?\n/g
+  frameDelimiter.lastIndex = pos
+
+  let delimiterMatch: RegExpExecArray | null
+  while ((delimiterMatch = frameDelimiter.exec(buffer)) !== null) {
+    const frameEnd = delimiterMatch.index
+    const rawFrame = buffer.slice(pos, frameEnd)
+    pos = frameEnd + delimiterMatch[0].length
 
     // Skip empty frames
     if (!rawFrame.trim()) continue
@@ -75,7 +79,13 @@ export function parseSSEFrames(buffer: string): {
     const frame: SSEFrame = {}
     let isComment = false
 
-    for (const line of rawFrame.split('\n')) {
+    for (const rawLine of rawFrame.split('\n')) {
+      // Normalize CRLF lines in mixed-line-ending streams.
+      const line =
+        rawLine[rawLine.length - 1] === '\r'
+          ? rawLine.slice(0, -1)
+          : rawLine
+
       if (line.startsWith(':')) {
         // SSE comment (e.g., `:keepalive`)
         isComment = true