diff --git a/src/el/sayid-magit.el b/src/el/sayid-magit.el
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+;;; sayid-magit.el --- Choose sayid tracing from magit -*- lexical-binding: t -*-
+
+;; Author: Mark Dawson
+;; Maintainer: Bill Piel <bill@billpiel.com>
+;; Version: 0.0.1
+;; URL: https://github.com/clojure-emacs/sayid
+;; Package-Requires: ((cider "0.21.0") (magit "2.90.1"))
+
+;; Licensed under the Apache License, Version 2.0 (the "License");
+;; you may not use this file except in compliance with the License.
+;; You may obtain a copy of the License at
+
+;;     http://www.apache.org/licenses/LICENSE-2.0
+
+;; Unless required by applicable law or agreed to in writing, software
+;; distributed under the License is distributed on an "AS IS" BASIS,
+;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+;; See the License for the specific language governing permissions and
+;; limitations under the License.
+
+;;; Commentary:
+
+;;; Code:
+
+;;;###autoload
+(defun sayid-magit--trace-ns-in-files (file-names)
+  "Trace namespace in FILE-NAMES."
+  (mapc (lambda (file-name)
+          (nrepl-send-sync-request (list "op" "sayid-trace-ns-in-file"
+                                         "file" file-name)
+                                   (cider-current-connection)))
+        file-names)
+  (sayid-show-traced))
+
+;;;###autoload
+(defun sayid-magit--changed-files (git-revision)
+  "Return the absolute paths to changed files which have a .clj \
+extension in the current .git directory since GIT-REVISION."
+  (seq-filter
+   (apply-partially #'string-match ".clj$")
+   (mapcar
+    (lambda (file)
+      (expand-file-name file (locate-dominating-file file ".git")))
+    (magit-changed-files git-revision))))
+
+;;;###autoload
+(defun sayid-magit-trace-changed-ns (git-revision)
+  "Trace the changed namespaces in a git commit since GIT-REVISION."
+  (interactive (list (magit-read-starting-point "Sayid trace" nil "HEAD")))
+  (sayid-magit--trace-ns-in-files
+   (sayid-magit--changed-files git-revision)))
+
+(provide 'sayid-magit)
+
+;;; sayid-magit.el ends here