diff --git a/TODOS.md b/TODOS.md
index ccf64f8..ba11a68 100644
--- a/TODOS.md
+++ b/TODOS.md
@@ -75,5 +75,3 @@ Note: These todos can wait until all the subcommands have been ported.
 27. version --long Odin only prints version; Go also prints commit hash and build date
 
 28. 2 scan tests silently skip	Low	When fd isn't installed, tests pass without actually testing anything. These should use #assert to be sure that fd is in path.
-
-29. nushell completions?
diff --git a/cli.odin b/cli.odin
index d86b265..23f63c0 100644
--- a/cli.odin
+++ b/cli.odin
@@ -46,6 +46,7 @@ COMMANDS := []CommandInfo {
 	},
 	{"version", "envr version", "Show envr's version", "", {}},
 	{"edit-config", "envr edit-config", "Edit your config with your default editor", "", {}},
+	{"nushell-completion", "envr nushell-completion", "Generate custom completions for nushell", "", {}},
 }
 
 parse_args :: proc() -> (cmd: Command, ok: bool) {
diff --git a/cmd_nushell_completion.odin b/cmd_nushell_completion.odin
new file mode 100644
index 0000000..a3ffcd0
--- /dev/null
+++ b/cmd_nushell_completion.odin
@@ -0,0 +1,9 @@
+package main
+
+import "core:fmt"
+
+COMPLETION_SCRIPT: string : string(#load("mod.nu"))
+
+cmd_nushell_completion :: proc(cmd: ^Command) {
+	fmt.print(COMPLETION_SCRIPT)
+}
diff --git a/cmd_nushell_completion_test.odin b/cmd_nushell_completion_test.odin
new file mode 100644
index 0000000..e97830d
--- /dev/null
+++ b/cmd_nushell_completion_test.odin
@@ -0,0 +1,36 @@
+package main
+
+import "core:fmt"
+import "core:strings"
+import "core:testing"
+
+@(test)
+test_nushell_completion_nonempty :: proc(t: ^testing.T) {
+	testing.expect(t, len(COMPLETION_SCRIPT) > 0, "completion script should not be empty")
+}
+
+@(test)
+test_nushell_completion_contains_externs :: proc(t: ^testing.T) {
+	expected := []string{
+		"tracked-paths",
+		"untracked-paths",
+		"envr backup",
+		"envr check",
+		"envr edit-config",
+		"envr help",
+		"envr init",
+		"envr list",
+		"envr remove",
+		"envr restore",
+		"envr scan",
+		"envr sync",
+		"envr nushell-completion",
+	}
+	for ext in expected {
+		testing.expect(
+			t,
+			strings.contains(COMPLETION_SCRIPT, ext),
+			fmt.tprintf("expected script to contain %q", ext),
+		)
+	}
+}
diff --git a/main.odin b/main.odin
index 5bc5719..afdfbcb 100644
--- a/main.odin
+++ b/main.odin
@@ -32,6 +32,8 @@ main :: proc() {
 		cmd_scan(&cmd)
 	case "sync":
 		cmd_sync(&cmd)
+	case "nushell-completion":
+		cmd_nushell_completion(&cmd)
 	case:
 		fmt.printf("Unknown command: %s\n", cmd.name)
 		print_usage()
diff --git a/mod.nu b/mod.nu
new file mode 100644
index 0000000..c16b57f
--- /dev/null
+++ b/mod.nu
@@ -0,0 +1,71 @@
+# envr command extern definitions for Nushell
+# A tool for managing environment files and backups
+
+export def tracked-paths [] {
+  (
+    ^envr list
+    | from json
+    | each {
+      [$in.directory $in.path] | path join
+    }
+  )
+}
+
+export def untracked-paths [] {
+  (
+    ^envr scan
+    | from json
+  )
+}
+
+export extern envr [
+  ...args: any
+  --help(-h)              # Show help information
+]
+
+export extern "envr backup" [
+  --help(-h) # Show help for backup command
+  path: path@untracked-paths # Path to .env file to backup
+]
+
+export extern "envr check" [
+  --help(-h)              # Show help for check command
+]
+
+export extern "envr edit-config" [
+  --help(-h)              # Show help for edit-config command
+]
+
+export extern "envr help" [
+  command?: string        # Show help for specific command
+]
+
+export extern "envr init" [
+  --help(-h)              # Show help for init command
+]
+
+export extern "envr list" [
+  --help(-h)              # Show help for list command
+]
+
+export extern "envr remove" [
+  --help(-h)              # Show help for remove command
+  path: path@tracked-paths
+]
+
+export extern "envr restore" [
+  --help(-h)              # Show help for restore command
+  path: path@tracked-paths
+]
+
+export extern "envr scan" [
+  --help(-h)              # Show help for scan command
+]
+
+export extern "envr sync" [
+  --help(-h)              # Show help for sync command
+]
+
+export extern "envr nushell-completion" [
+  --help(-h)              # Show help for nushell-completion command
+]