diff --git a/knowledge base/xargs.md b/knowledge base/xargs.md
index dd8b0e3..79aecc8 100644
--- a/knowledge base/xargs.md	
+++ b/knowledge base/xargs.md	
@@ -1,11 +1,14 @@
 # `xargs`
 
-## Table of contents <!-- omit in toc -->
-
 1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+   1. [Sources](#sources)
 
 ## TL;DR
 
+<details>
+  <summary>Usage</summary>
+
 ```sh
 # print the command to be executed and immediately start it
 echo 1 2 3 4 | xargs -t mkdir
@@ -26,6 +29,32 @@ find ~ -type d -name ".git" -exec dirname {} + | xargs -I // git -C "//" pull
 # The 'aliases' array works only in ZSH.
 echo 1 2 3 4 | xargs "${BASH_ALIASES[my-alias]}"
 echo 1 2 3 4 | xargs $aliases['my-alias']
+
+# Execute interactive commands.
+# Reopen the TTY with '-o', '--open-tty'.
+grep -lz PATTERN * | xargs -0o vi
+find '.' -type 'f' -name 'Pulumi.yaml' -not -path "*/node_modules/*" -exec dirname {} '+' | xargs -otI%% pulumi up -C %%
 ```
 
+</details>
+
+## Further readings
+
+- [An Opinionated Guide to xargs]
+
+### Sources
+
+- [xargs: exec command with prompt]
+
+<!--
+  Reference
+  ═╬═Time══
+  -->
+
+<!-- In-article sections -->
+<!-- Knowledge base -->
+<!-- Files -->
+<!-- Upstream -->
+<!-- Others -->
 [an opinionated guide to xargs]: https://www.oilshell.org/blog/2021/08/xargs.html
+[xargs: exec command with prompt]: https://stackoverflow.com/questions/30044927/xargs-exec-command-with-prompt#69590861