Problem

When running curl -fsSL https://openclaw.ai/install.sh | bash, gum is disabled because stdin is a pipe (is_non_interactive_shell returns true). Without gum, run_npm_global_install silently redirects all output to a temp log file:

"${cmd[@]}" >"$log" 2>&1

Users see no feedback during the npm install step, which can take 60+ seconds. The gum branch already shows "Installing OpenClaw package" via run_with_spinner, but the no-gum fallback is completely silent.

Reproduction

curl -fsSL https://openclaw.ai/install.sh | bash

Observe 60+ seconds of silence between the version detection and the "OpenClaw npm package installed" success message.

Expected behavior

A progress line like Installing OpenClaw package should appear before the silent npm command, matching the pattern from PR #71720 that was applied to run_quiet_step.

Affected file

scripts/install.sh (line ~740, no-gum branch of run_npm_global_install)

Related

• PR fix(install): show progress during npm install in non-interactive mode #76355 fixes this