add NEWS entries about debug.gem

1 files changed, 12 insertions, 0 deletions

diff --git a/NEWS.md b/NEWS.md
index 2b71603ea5..2bc3ccb48a 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -189,6 +189,8 @@ Excluding feature bug fixes.
 * `ERB#initialize` warns `safe_level` and later arguments even without -w.
   [[Feature #14256]]
 
+* `lib/debug.rb` is replaced with `debug.gem`
+
 ## C API updates
 
 * Documented. [[GH-4815]]
@@ -216,6 +218,16 @@ Excluding feature bug fixes.
 
 ### TypeProf
 
+## Debugger
+
+* A new debugger [debug.gem](https://github.com/ruby/debug) is bundled.
+  debug.gem is fast debugger implementation and it provides many features
+  like remote debugging, colorful REPL, IDE (VSCode) integration and more.
+  It replaces `lib/debug.rb` standard library.
+
+* `rdbg` command is also installed into `bin/` directory to start and control
+  debugging execution.
+
 ## Miscellaneous changes
 
 * lib/objspace/trace.rb is added, which is a tool for tracing the object