diff --git a/.gitignore b/.gitignore
index b873546..6eec620 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 vendor
 bin
+.vscode
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..5b1b861
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,10 @@
+language: go
+
+go:
+- 1.12.x
+env:
+  - GO111MODULE=on
+script: 
+- ./ci/ensuremod.sh
+- ./ci/lint.sh 
+- go test -v ./...
diff --git a/ci/ensuremod.sh b/ci/ensuremod.sh
new file mode 100755
index 0000000..a974d6b
--- /dev/null
+++ b/ci/ensuremod.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# inspired by nhooyr's days as CI overlord
+
+set -eou pipefail
+
+function help() {
+  echo
+  echo "you may need to update go.mod/go.sum via:"
+  echo "go list all > /dev/null"
+  echo "go mod tidy"
+  exit 1
+}
+
+go list -mod=readonly all > /dev/null
+
+go mod tidy
+
+if [[ $(git diff --name-only) != "" ]]; then
+  git diff
+  help
+fi
diff --git a/ci/lint.sh b/ci/lint.sh
new file mode 100755
index 0000000..76d26c1
--- /dev/null
+++ b/ci/lint.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Inspired by nhooyr's days as CI overlord.
+
+set -euo pipefail
+
+files=$(gofmt -l -s .)
+
+if [ ! -z "$files" ]; 
+then
+  echo "The following files need to be formatted:"
+  echo "$files"
+  echo "Please run 'gofmt -w -s .'"
+  exit 1
+fi
+
+go vet -composites=false .