diff --git a/src/rt/rfwfs/core.ts b/src/rt/rfwfs/core.ts
index ad3618e..57e4615 100644
--- a/src/rt/rfwfs/core.ts
+++ b/src/rt/rfwfs/core.ts
@@ -1,37 +1,19 @@
-const enum EntryType {
-	Directory,
-	File
-}
-const enum Permissions {
-	r,
-	w,
-	rw
-}
+import rfwfs_search from "./index"
+import rfwfs_entry_trait, {EntryType, type Entry, type EntryTree} from "./entry"
+
 
-type FsList = FsEntry[]
-type FsEntry = Entry<{}>
-type FsDirectory = Entry<FsList>
 
-type File = string
-interface Entry<T = File> {
-	readonly inner?: T,
-	readonly name: string,
-	readonly type: EntryType,
-	readonly permissions: Permissions
-}
 function Entry<T = File>(name: string, inner: T, permissions: Permissions): Entry<T> {
 	return {
 		type: typeof inner == "object" ? EntryType.Directory : EntryType.File,
 		inner: inner,
 		name: name,
-		permissions: permissions
+		permissions: permissions,
+		timestamp: Math.floor(Date.now()/1000)
 	}
 }
 
 export {
-	type FsDirectory,
-	type FsEntry,
-	type FsList,
 	EntryType,
 	Permissions,
 	Entry
diff --git a/src/rt/rfwfs/entry.ts b/src/rt/rfwfs/entry.ts
new file mode 100644
index 0000000..7cd95ef
--- /dev/null
+++ b/src/rt/rfwfs/entry.ts
@@ -0,0 +1,89 @@
+import rfwfs_search from "./index"
+
+const enum EntryType {
+	Directory,
+	File
+}
+
+const enum Permissions {
+	r,
+	w,
+	rw,
+	none
+}
+
+type Files<T> = Entry<T>[]
+type File = string
+
+interface EntryListManipulate {
+	push: <T extends Entry<T>>(entry: Entry<T>) => boolean,
+	pop: <T extends Entry<T>>(file_name: string) => Entry<T> | undefined,
+	sort: () => void,
+}
+
+interface EntryList<T> extends EntryListManipulate {
+	readonly tree: Files<T>
+}
+
+interface Entry<T = File> {
+	readonly inner: EntryList<T>,
+	readonly name: string,
+	readonly type: EntryType,
+	readonly timestamp: number,
+	readonly permissions: Permissions,
+}
+
+function rfwfs_entry_trait<T extends Entry<T>>(): EntryList<T> {
+	const trait = {} as EntryList<T>
+	trait.sort = function() {
+		this.tree.sort((a,z) => a.name.localeCompare(z.name))
+	}
+	trait.push = function(entry) {
+		const no_duplicates = rfwfs_search.binary_fs_name(this.tree, entry.name)
+		if (!no_duplicates) {
+			this.tree.push(entry)
+			this.sort()
+			return true
+		}
+		return false
+	}
+	trait.pop = function(file_name) {
+		const file_search = rfwfs_search.binary_fs_name(this.tree, file_name)
+		if (file_search) {
+			this.tree.splice(file_search.binary_index, 1)
+			return file_search.item
+		}
+		return
+	}
+	return trait
+}
+
+function rfwfs_new_entry_tree<T>(files: Files<T>) {
+
+}
+
+function rfwfs_new_entry<T extends EntryList<T>>(
+	name: string,
+	inner: T,
+	permissions: Permissions,
+	timestamp: number = Math.floor(Date.now()/1000)
+): Entry<T> {
+	return {
+		type: typeof inner == "object" ? EntryType.Directory : EntryType.File,
+		timestamp: timestamp,
+		name: name,
+		permissions: permissions,
+		inner: inner,
+	}
+}
+
+export {
+	rfwfs_entry_trait,
+	rfwfs_new_entry,
+	EntryType,
+	Permissions,
+	type EntryList,
+	type Entry,
+	type Files,
+	type File,
+}
\ No newline at end of file
diff --git a/src/rt/rfwfs/index.ts b/src/rt/rfwfs/index.ts
index 75c0f4c..f1b58c0 100644
--- a/src/rt/rfwfs/index.ts
+++ b/src/rt/rfwfs/index.ts
@@ -1,12 +1,12 @@
-import { type FsList, type FsEntry } from "./core"
+import { type Entry, type Files } from "./entry"
 
 interface SearchResult<T> {
 	item: T,
 	binary_index: number
 }
 interface Search {
-	binary_fs: (cloned_list: FsList, file_name: string) => SearchResult<FsEntry> | undefined,
-	binary_nsort: <T>(list: T[], find: T, start: number, end: number) => SearchResult<T> | undefined,
+	binary_fs_name: <T extends Entry<T>>(cloned_list: Files<T>, file_name: string) => SearchResult<Entry<T>> | undefined,
+	binary_nsort: <T>(list: T[], find: T, start?: number, end?: number) => SearchResult<T> | undefined,
 	binary: <T>(list: T[], find: T) => SearchResult<T> | undefined,
 	linear: <T>(list: T[], find: T) => SearchResult<T> | undefined,
 }
@@ -15,9 +15,9 @@ function wrap_result<T>(item: T, binary_index: number): SearchResult<T> {
 	return { item: item, binary_index: binary_index }
 }
 
-const search = {} as Search
+const rfwfs_search = {} as Search
 
-search.binary = function(list, find) {
+rfwfs_search.binary = function(list, find) {
 	list.sort()
 	let start = 0
 	let end = list.length-1
@@ -34,7 +34,7 @@ search.binary = function(list, find) {
 	return
 }
 
-search.binary_nsort = function(list, find, start = 0, end = list.length-1) {
+rfwfs_search.binary_nsort = function(list, find, start = 0, end = list.length-1) {
 	if (start>end) { return }
 	const median = (start+end)>>1
 	if (list[median] === find) {
@@ -47,16 +47,15 @@ search.binary_nsort = function(list, find, start = 0, end = list.length-1) {
 	}
 }
 
-search.binary_fs = function(cloned_list, file_name) {
-	cloned_list.sort((a,z) => a.name.localeCompare(z.name))
+rfwfs_search.binary_fs_name = function(cloned_entry_list, file_name) {
 	let start = 0
-	let end = cloned_list.length-1
+	let end = cloned_entry_list.length-1
 	while (start<=end) {
 		const median = (start+end)>>1
-		const median_name = cloned_list[median].name
+		const median_name = cloned_entry_list[median].name
 
 		if (median_name === file_name) {
-			return wrap_result(cloned_list[median], median)
+			return wrap_result(cloned_entry_list[median], median)
 		} else if (median_name<file_name) {
 			start = median+1
 		} else {
@@ -66,7 +65,7 @@ search.binary_fs = function(cloned_list, file_name) {
 	return
 }
 
-search.linear = function(list, find) {
+rfwfs_search.linear = function(list, find) {
 	for (let ind = 0; ind<list.length; ind++) {
 		if (list[ind] === find) {
 			return wrap_result(list[ind], ind)
@@ -75,4 +74,4 @@ search.linear = function(list, find) {
 	return
 }
 
-export default search
\ No newline at end of file
+export default rfwfs_search
\ No newline at end of file