add dir command to print worktree path for a session

src/cli.ts

@@ -399,6 +399,23 @@ program
     }
   })
 
+// ── sandlot dir <branch> ────────────────────────────────────────────
+
+program
+  .command("dir")
+  .argument("<branch>", "branch name")
+  .description("Print the worktree path for a session")
+  .action(async (branch: string) => {
+    const root = await git.repoRoot()
+    const session = await state.getSession(root, branch)
+    if (!session) {
+      console.error(`No session found for branch "${branch}".`)
+      process.exit(1)
+    }
+
+    process.stdout.write(session.worktree + "\n")
+  })
+
 // ── sandlot vm ───────────────────────────────────────────────────────
 
 const vmCmd = program.command("vm").description("Manage the sandlot VM")