diff --git a/.config/wt.toml b/.config/wt.toml
new file mode 100644
index 0000000..c151ea3
--- /dev/null
+++ b/.config/wt.toml
@@ -0,0 +1,8 @@
+# worktrunk hooks: each worktree gets its own packages, its own port and its own database file.
+
+[pre-start]
+deps = "bun install --frozen-lockfile > /dev/null"
+env = "echo PORT={{ branch | hash_port }} > .env && echo SPLITBILL_DB=splitbill_{{ branch | sanitize_db }}.sqlite >> .env"
+
+[pre-remove]
+drop = "rm -f splitbill_{{ branch | sanitize_db }}.sqlite"
diff --git a/.gitignore b/.gitignore
index c2a17f1..66191ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ node_modules/
 .factory/runs/
 *.log
 .worktrees/
+.env