diff --git a/TeXmacs/plugins/gnuplot/goldfish/tm-gnuplot.scm b/TeXmacs/plugins/gnuplot/goldfish/tm-gnuplot.scm
index 9fe073aead..835b73c9df 100644
--- a/TeXmacs/plugins/gnuplot/goldfish/tm-gnuplot.scm
+++ b/TeXmacs/plugins/gnuplot/goldfish/tm-gnuplot.scm
@@ -40,14 +40,11 @@
   ) ;let
 ) ;define
 
-(define (gnuplot-read-code)
-  (define (read-code code)
-    (let ((line (read-line)))
-      (if (string=? line "<EOF>\n") code (read-code (string-append code line)))
-    ) ;let
-  ) ;define
+;; 协议读取统一由 (texmacs protocol) 承担：兼容 R7RS read-line（不保留行尾
+;; 换行），实现见 read-paragraph-by-visible-eof
 
-  (read-code "")
+(define (gnuplot-read-code)
+  (read-paragraph-by-visible-eof)
 ) ;define
 
 (define (gen-temp-path)
diff --git a/TeXmacs/plugins/goldfish/goldfish/texmacs/protocol.scm b/TeXmacs/plugins/goldfish/goldfish/texmacs/protocol.scm
index 6fc568b84a..38d1b1dd3b 100644
--- a/TeXmacs/plugins/goldfish/goldfish/texmacs/protocol.scm
+++ b/TeXmacs/plugins/goldfish/goldfish/texmacs/protocol.scm
@@ -64,10 +64,36 @@
       (flush-any (string-append "latex:" msg))
     ) ;define
 
+    ;; 行尾归一：R7RS 的 read-line 不保留行尾换行（goldfish >= 18.11.40 的
+    ;; stdin 实现）；18.11.39 及更早的 stdin 实现用 fgets，保留换行。插件
+    ;; 协议以逐行拼接还原段落，故新语义下须补回换行。
+    (define (read-paragraph-line-with-eol line)
+      (let ((n (string-length line)))
+        (if
+          (and (> n 0) (char=? (string-ref line (- n 1)) #\newline))
+          line
+          (string-append line "\n")
+        ) ;if
+      ) ;let
+    ) ;define
+
+    ;; 段末标记：同时接受带/不带行尾换行（含 CRLF）的 "<EOF>"。旧 goldfish
+    ;; 送来的行自带 "\n"，新 goldfish 不带；两种都认，升级前后行为一致。
+    (define (read-paragraph-eof-marker? line)
+      (or (string=? line "<EOF>")
+        (string=? line "<EOF>\n")
+        (string=? line "<EOF>\r")
+        (string=? line "<EOF>\r\n")
+      ) ;or
+    ) ;define
+
     (define (read-paragraph-by-visible-eof)
       (define (read-code code)
         (let ((line (read-line)))
-          (if (string=? line "<EOF>\n") code (read-code (string-append code line)))
+          (if (read-paragraph-eof-marker? line)
+            code
+            (read-code (string-append code (read-paragraph-line-with-eol line)))
+          ) ;if
         ) ;let
       ) ;define
 
diff --git a/TeXmacs/plugins/llm/progs/llm/tests/chat-protocol-test.scm b/TeXmacs/plugins/llm/progs/llm/tests/chat-protocol-test.scm
index 195eec8d88..7c30293d68 100644
--- a/TeXmacs/plugins/llm/progs/llm/tests/chat-protocol-test.scm
+++ b/TeXmacs/plugins/llm/progs/llm/tests/chat-protocol-test.scm
@@ -16,6 +16,7 @@
 (import (liii json))
 (import (liii os))
 (import (liii path))
+(import (texmacs protocol))
 
 (check-set-mode! 'report-failed)
 
@@ -467,6 +468,24 @@
   ) ;let*
 ) ;define
 
+;;; ---------- read-paragraph-by-visible-eof：R7RS read-line 兼容 ----------
+
+(define (test-read-paragraph-eof-marker)
+  ;; 18.11.40：read-line 不带行尾换行，helper 需自行补回；
+  ;; 18.11.39：行内已带换行，helper 原样拼接。两种语义期望结果相同。
+  (with-input-from-string "line1\nline2\n<EOF>\n"
+    (lambda () (check (read-paragraph-by-visible-eof) => "line1\nline2\n"))
+  ) ;with-input-from-string
+  ;; 空段落
+  (with-input-from-string "<EOF>\n"
+    (lambda () (check (read-paragraph-by-visible-eof) => ""))
+  ) ;with-input-from-string
+  ;; 空行也保留
+  (with-input-from-string "a\n\nb\n<EOF>\n"
+    (lambda () (check (read-paragraph-by-visible-eof) => "a\n\nb\n"))
+  ) ;with-input-from-string
+) ;define
+
 ;;; ---------- 测试套件入口 ----------
 
 (tm-define (regtest-chat-protocol)
@@ -484,5 +503,6 @@
   (test-fake-llm-attachment-injection)
   (test-fake-llm-no-attachments)
   (test-chat-wire-encoding)
+  (test-read-paragraph-eof-marker)
   (check-report)
 ) ;tm-define
diff --git a/TeXmacs/plugins/quiver/goldfish/tm-quiver.scm b/TeXmacs/plugins/quiver/goldfish/tm-quiver.scm
index 632672e4e0..337442793b 100644
--- a/TeXmacs/plugins/quiver/goldfish/tm-quiver.scm
+++ b/TeXmacs/plugins/quiver/goldfish/tm-quiver.scm
@@ -43,16 +43,11 @@
   (flush-verbatim "Liii STEM interface to Quiver")
 ) ;define
 
+;; 协议读取统一由 (texmacs protocol) 承担：兼容 R7RS read-line（不保留行尾
+;; 换行），实现见 read-paragraph-by-visible-eof
+
 (define (quiver-read-code)
-  (define (read-code code)
-    (let ((line (read-line)))
-      (if (or (eof-object? line) (string=? line "<EOF>\n"))
-        code
-        (read-code (string-append code line))
-      ) ;if
-    ) ;let
-  ) ;define
-  (read-code "")
+  (read-paragraph-by-visible-eof)
 ) ;define
 
 (define (gen-temp-path)
diff --git a/TeXmacs/plugins/tikz/goldfish/tm-tikz.scm b/TeXmacs/plugins/tikz/goldfish/tm-tikz.scm
index 7f6d7c6f15..c6395288bf 100644
--- a/TeXmacs/plugins/tikz/goldfish/tm-tikz.scm
+++ b/TeXmacs/plugins/tikz/goldfish/tm-tikz.scm
@@ -32,16 +32,11 @@
   (flush-verbatim "Liii STEM interface to TikZ")
 ) ;define
 
+;; 协议读取统一由 (texmacs protocol) 承担：兼容 R7RS read-line（不保留行尾
+;; 换行），实现见 read-paragraph-by-visible-eof
+
 (define (tikz-read-code)
-  (define (read-code code)
-    (let ((line (read-line)))
-      (if (or (eof-object? line) (string=? line "<EOF>\n"))
-        code
-        (read-code (string-append code line))
-      ) ;if
-    ) ;let
-  ) ;define
-  (read-code "")
+  (read-paragraph-by-visible-eof)
 ) ;define
 
 (define (decode-texmacs-markup code)