diff --git a/Makefile b/Makefile
index 447c3db5..705f5c39 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,7 @@ guest/.tinygo-target.json: scheduler/go.mod
 build-wat: $(wildcard scheduler/test/testdata/*/*.wat)
 	@for f in $^; do \
         wasm=$$(echo $$f | sed -e 's/\.wat/\.wasm/'); \
-		wat2wasm $$f -o $$wasm --debug-names $$f; \
+		wat2wasm -o $$wasm --debug-names $$f; \
 	done
 
 .PHONY: testdata
diff --git a/guest/api/types.go b/guest/api/types.go
index 187f9eeb..26accba4 100644
--- a/guest/api/types.go
+++ b/guest/api/types.go
@@ -67,7 +67,6 @@ type FilterPlugin interface {
 	Filter(state CycleState, pod proto.Pod, nodeInfo NodeInfo) *Status
 }
 
-// TODO: fix
 // PostFilterPlugin is a WebAssembly implementation of framework.PostFilterPlugin.
 type PostFilterPlugin interface {
 	Plugin
diff --git a/guest/postfilter/postfilter.go b/guest/postfilter/postfilter.go
index ce575ff4..fac6f66a 100644
--- a/guest/postfilter/postfilter.go
+++ b/guest/postfilter/postfilter.go
@@ -22,7 +22,6 @@ import (
 	internalpostfilter "sigs.k8s.io/kube-scheduler-wasm-extension/guest/internal/postfilter"
 )
 
-// TODO fix explanation
 // SetPlugin should be called in `main` to assign an api.PostFilterPlugin
 // instance.
 //
@@ -30,13 +29,13 @@ import (
 //
 //	func main() {
 //		plugin := filterPlugin{}
-//		prefilter.SetPlugin(plugin)
+//		postfilter.SetPlugin(plugin)
 //		filter.SetPlugin(plugin)
 //	}
 //
 //	type filterPlugin struct{}
 //
-//	func (filterPlugin) PreFilter(state api.CycleState, pod proto.Pod, nodeList proto.NodeList) {
+//	func (filterPlugin) PostFilter(state api.CycleState, pod proto.Pod, filteredNodeStatusMap internalpostfilter.NodeToStatusMap) (int32, status *api.Status) {
 //		// Write state you need on Filter
 //	}
 //
@@ -46,7 +45,7 @@ import (
 //		return Filter, nil
 //	}
 //
-// Note: This may be set without filter.SetPlugin, if the pre-filter plugin has
+// Note: This may be set without filter.SetPlugin, if the post-filter plugin has
 // the only filtering logic, or only used to configure api.CycleState.
 func SetPlugin(postfilterPlugin api.PostFilterPlugin) {
 	internalpostfilter.SetPlugin(postfilterPlugin)
diff --git a/guest/prefilter/prefilter.go b/guest/prefilter/prefilter.go
index 73db7179..26745fa0 100644
--- a/guest/prefilter/prefilter.go
+++ b/guest/prefilter/prefilter.go
@@ -35,7 +35,7 @@ import (
 //
 //	type filterPlugin struct{}
 //
-//	func (filterPlugin) PreFilter(state api.CycleState, pod proto.Pod, nodeList proto.NodeList) {
+//	func (filterPlugin) PreFilter(state api.CycleState, pod proto.Pod) (nodeNames []string, status *Status) {
 //		// Write state you need on Filter
 //	}
 //