diff --git a/src/rt/elements/prompt.ts b/src/rt/elements/prompt.ts
index 09de7e5..828879d 100644
--- a/src/rt/elements/prompt.ts
+++ b/src/rt/elements/prompt.ts
@@ -1,5 +1,5 @@
 import { cyan, green } from "../shell/color"
-import { get_working_dir_name } from "../shell/fs/fn"
+import { get_working_dir_name } from "../shell/fs/library"
 
 import create from "./create"
 
diff --git a/src/rt/shell/command/builtin/cd.ts b/src/rt/shell/command/builtin/cd.ts
index e05a547..362291b 100644
--- a/src/rt/shell/command/builtin/cd.ts
+++ b/src/rt/shell/command/builtin/cd.ts
@@ -1,4 +1,4 @@
-import { set_working_dir, SetDirStatus } from "../../fs/fn"
+import { set_working_dir, SetDirStatus } from "../../fs/library"
 import type { Args, Term } from "../list"
 
 import stdout from "../../../elements/stdout"
diff --git a/src/rt/shell/command/builtin/ls.ts b/src/rt/shell/command/builtin/ls.ts
index fe3d531..b2438f6 100644
--- a/src/rt/shell/command/builtin/ls.ts
+++ b/src/rt/shell/command/builtin/ls.ts
@@ -1,7 +1,7 @@
 import type { Args, Term } from "../list";
 import { blue } from "../../color";
-import { get_working_dir_entries } from "../../fs/fn";
-import { EntryType, FsEntry } from "../../fs/fs";
+import { get_working_dir_entries } from "../../fs/library";
+import { EntryType, FsEntry } from "../../fs/core";
 
 import stdout, { stdout_horizontal_elements } from "../../../elements/stdout";
 import create from "../../../elements/create";
diff --git a/src/rt/shell/command/builtin/pwd.ts b/src/rt/shell/command/builtin/pwd.ts
index 7e611e2..b686d1e 100644
--- a/src/rt/shell/command/builtin/pwd.ts
+++ b/src/rt/shell/command/builtin/pwd.ts
@@ -1,4 +1,4 @@
-import { get_working_dir_name_full } from "../../fs/fn";
+import { get_working_dir_name_full } from "../../fs/library";
 import type { Args, Term } from "../list";
 
 import stdout from "../../../elements/stdout";
diff --git a/src/rt/shell/fs/fs.ts b/src/rt/shell/fs/core.ts
similarity index 100%
rename from src/rt/shell/fs/fs.ts
rename to src/rt/shell/fs/core.ts
diff --git a/src/rt/shell/fs/fn.ts b/src/rt/shell/fs/library.ts
similarity index 99%
rename from src/rt/shell/fs/fn.ts
rename to src/rt/shell/fs/library.ts
index bcee1c3..4e69ea1 100644
--- a/src/rt/shell/fs/fn.ts
+++ b/src/rt/shell/fs/library.ts
@@ -1,4 +1,4 @@
-import { EntryType, fs, type FsDirectory, type FsEntry } from "./fs"
+import { EntryType, fs, type FsDirectory, type FsEntry } from "./core"
 
 let working_dir = ["/", "home", "user"]