diff --git a/tools/cmd/wcloud/types.go b/tools/cmd/wcloud/types.go
index 16e6b2622..b02ee4c14 100644
--- a/tools/cmd/wcloud/types.go
+++ b/tools/cmd/wcloud/types.go
@@ -21,4 +21,15 @@ type Config struct {
 	RepoPath       string `json:"repo_path" yaml:"repo_path"`
 	RepoKey        string `json:"repo_key" yaml:"repo_key"`
 	KubeconfigPath string `json:"kubeconfig_path" yaml:"kubeconfig_path"`
+
+	Notifications []NotificationConfig `json:"notifications" yaml:"notifications"`
+
+	// Globs of files not to change, relative to the route of the repo
+	ConfigFileBlackList []string `json:"config_file_black_list" yaml:"config_file_black_list"`
+}
+
+// NotificationConfig describes how to send notifications
+type NotificationConfig struct {
+	SlackWebhookURL string `json:"slack_webhook_url" yaml:"slack_webhook_url"`
+	SlackUsername   string `json:"slack_username" yaml:"slack_username"`
 }
diff --git a/tools/files-with-type b/tools/files-with-type
index d969f4405..8238980c6 100755
--- a/tools/files-with-type
+++ b/tools/files-with-type
@@ -4,10 +4,8 @@
 #
 # e.g.
 #     $ files-with-type text/x-shellscript k8s infra
-#
-# Assumes `find`, `xargs`, and `file` are all installed.
 
 mime_type=$1
 shift
 
-find  "$@" -print0 -type f |xargs -0 file --mime-type | grep "${mime_type}" | sed -e 's/:.*$//'
+git ls-files "$@" | grep -vE '^vendor/' | xargs file --mime-type | grep "${mime_type}" | sed -e 's/:.*$//'
diff --git a/tools/lint b/tools/lint
index e807f8824..994d4c321 100755
--- a/tools/lint
+++ b/tools/lint
@@ -166,7 +166,7 @@ function lint_files {
 
 function list_files {
 	if [ $# -gt 0 ]; then
-		find "$@" -type f | grep -vE '(^\./\.git|^\./\.pkg|/vendor/|/node_modules/|\.codecgen\.go$|\.generated\.go$)'
+        git ls-files --exclude-standard | grep -vE '(^|/)vendor/'
 	else
 		git diff --cached --name-only
 	fi
diff --git a/tools/test b/tools/test
index 61791772b..f8d76c56b 100755
--- a/tools/test
+++ b/tools/test
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -ex
+set -e
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 GO_TEST_ARGS=( -tags netgo -cpu 4 -timeout 8m )
@@ -47,7 +47,8 @@ fi
 
 fail=0
 
-TESTDIRS=( $(find . -type f -name '*_test.go' -print0 | xargs -0 -n1 dirname | grep -vE '^\./(\.git|vendor|prog|experimental)/' | sort -u) )
+# NB: Relies on paths being prefixed with './'.
+TESTDIRS=( $(git ls-files -- '*_test.go' | grep -vE '^(vendor|prog|experimental)/' | xargs -n1 dirname  | sort -u | sed -e 's|^|./|') )
 
 # If running on circle, use the scheduler to work out what tests to run on what shard
 if [ -n "$CIRCLECI" ] && [ -z "$NO_SCHEDULER" ] && [ -x "$DIR/sched" ]; then