diff --git a/.gitignore b/.gitignore
index 588c6b0a..d59e68aa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -105,5 +105,11 @@ uv.lock
 
 # Sandbox
 sandbox/
+
+# AI Agents and tools
 .bob/
-.serena/
\ No newline at end of file
+.serena/
+.specify/
+specs/
+*plan*.md
+AGENTS.md
diff --git a/src/instana/version.py b/src/instana/version.py
index 83fac160..b8b55158 100644
--- a/src/instana/version.py
+++ b/src/instana/version.py
@@ -3,4 +3,4 @@
 
 # Module version file.  Used by setup.py and snapshot reporting.
 
-VERSION = "3.20.0"
+VERSION = "3.21.0"