diff --git a/devel/216_50.md b/devel/216_50.md
new file mode 100644
index 00000000..aaf7894d
--- /dev/null
+++ b/devel/216_50.md
@@ -0,0 +1,31 @@
+# [216_50] 修改gf doc和source的提示文档
+
+## 如何测试
+`bin/gf`
+输出
+相关的输出修改为
+```
+  source ORG/LIB     Print the exact source of ORG/LIB from current *load-path*
+                     Reads the real library file, not tests/ or generated docs
+                     Example: gf source liii/path
+  doc ORG/LIB        Show the library overview for ORG/LIB from tests/
+                     Usually reads tests/ORG/LIB-test.scm
+                     Example: gf doc liii/path
+  doc ORG/LIB FUNC   Show the function doc/test file for FUNC under a specific library
+                     Best when you already know the library, or the name is ambiguous
+                     Example: gf doc liii/path "path-read-text"
+                     Quote FUNC for names like "bag-delete!", "path?", "alist->fxmapping", or "bag<=?"
+                     This preserves symbols such as ! ? > < and keeps FUNC as one shell argument
+  doc FUNC           Search visible libraries for exported FUNC, then show its doc/test file
+                     If multiple libraries export it, candidates are listed
+                     Example: gf doc "string-split"
+                     Quote FUNC for names like "bag-delete!", "path?", "alist->fxmapping", or "bag<=?"
+                     This keeps shell-sensitive symbols intact and makes it clear FUNC is one argument
+  doc --build-json   Rebuild tests/function-library-index.json for global gf doc FUNC lookup
+                     Needed by function-name search and fuzzy suggestions
+                     Run this after changing exports, or before packaging
+```
+
+
+
+## 2026/04/03 修改gf doc和source的提示文档
diff --git a/src/goldfish.hpp b/src/goldfish.hpp
index 34320f65..dd1bf862 100644
--- a/src/goldfish.hpp
+++ b/src/goldfish.hpp
@@ -3382,10 +3382,25 @@ display_help () {
   cout << "  fix [options] PATH Format PATH (PATH can be a .scm file or directory)" << endl;
   cout << "                     Options:" << endl;
   cout << "                       --dry-run  Print formatted result to stdout" << endl;
-  cout << "  source ORG/LIB     Display exact library source from *load-path*" << endl;
-  cout << "  doc ORG/LIB        Display exact library documentation from tests/" << endl;
-  cout << "  doc FUNC           Display exact function documentation from tests/" << endl;
-  cout << "  doc --build-json   Rebuild function-library-index.json under tests/" << endl;
+  cout << "  source ORG/LIB     Print the exact source of ORG/LIB from current *load-path*" << endl;
+  cout << "                     Reads the real library file, not tests/ or generated docs" << endl;
+  cout << "                     Example: gf source liii/path" << endl;
+  cout << "  doc ORG/LIB        Show the library overview for ORG/LIB from tests/" << endl;
+  cout << "                     Usually reads tests/ORG/LIB-test.scm" << endl;
+  cout << "                     Example: gf doc liii/path" << endl;
+  cout << "  doc ORG/LIB FUNC   Show the function doc/test file for FUNC under a specific library" << endl;
+  cout << "                     Best when you already know the library, or the name is ambiguous" << endl;
+  cout << "                     Example: gf doc liii/path \"path-read-text\"" << endl;
+  cout << "                     Quote FUNC for names like \"bag-delete!\", \"path?\", \"alist->fxmapping\", or \"bag<=?\"" << endl;
+  cout << "                     This preserves symbols such as ! ? > < and keeps FUNC as one shell argument" << endl;
+  cout << "  doc FUNC           Search visible libraries for exported FUNC, then show its doc/test file" << endl;
+  cout << "                     If multiple libraries export it, candidates are listed" << endl;
+  cout << "                     Example: gf doc \"string-split\"" << endl;
+  cout << "                     Quote FUNC for names like \"bag-delete!\", \"path?\", \"alist->fxmapping\", or \"bag<=?\"" << endl;
+  cout << "                     This keeps shell-sensitive symbols intact and makes it clear FUNC is one argument" << endl;
+  cout << "  doc --build-json   Rebuild tests/function-library-index.json for global gf doc FUNC lookup" << endl;
+  cout << "                     Needed by function-name search and fuzzy suggestions" << endl;
+  cout << "                     Run this after changing exports, or before packaging" << endl;
   cout << "  test [PATTERN]     Run tests (all *-test.scm files under tests/)" << endl;
   cout << "                     PATTERN can be:" << endl;
   cout << "                       (none)          Run all tests" << endl;