diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..03290a5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,27 @@
+## NPM.
+node_modules
+
+## Emacs things (from
+## https://github.com/github/gitignore/blob/master/Global/Emacs.gitignore).
+*~
+\#*\#
+/.emacs.desktop
+/.emacs.desktop.lock
+.elc
+auto-save-list
+tramp
+.\#*
+
+## Org-mode
+.org-id-locations
+*_archive
+
+# Pipeline artifacts
+rules.log
+pipeline/target/
+pipeline/env
+pipeline/*.log
+
+*.egg-info
+env
+__pycache__