diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e773edf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/tracing-core-0.1.15.crate
diff --git a/sources b/sources
new file mode 100644
index 0000000..b9f283f
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (tracing-core-0.1.15.crate) = a64b1c6b9660f130a06f8e672018994ec3aa2157350678a6e27a5351a4ed6034927de4ebb08e232fb9107e34b5753299e1b80145751dbd138b0f79a0478d4091