diff --git a/.claude/worktrees/admiring-noether-621bfe b/.claude/worktrees/admiring-noether-621bfe
deleted file mode 160000
index 6083744..0000000
--- a/.claude/worktrees/admiring-noether-621bfe
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 6083744b3f3e7b5ec52f5f7b935f1d7e06b97a1d
diff --git a/.codex b/.codex
deleted file mode 100644
index e69de29..0000000
diff --git a/.gitignore b/.gitignore
index 8abdc59..3735206 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 .files/
 
-.last-branch
-
 __pycache__/
 *.pyc
+
+.claude/
+.codex
diff --git a/version.txt b/version.txt
deleted file mode 100644
index d2db7db..0000000
--- a/version.txt
+++ /dev/null
@@ -1 +0,0 @@
-v0.2.8