### Summary

Using the zsh completion snippet:

```zsh
source <(openclaw completion --shell zsh)

causes this error on shell startup:

command not found: compdef

Environment

• OpenClaw: 2026.1.30
• Shell: zsh
• OS: macOS

Reproduction

1. In .zshrc, add:

   source <(openclaw completion --shell zsh)

2. Do not run compinit before this line.
3. Start a new zsh session.
4. Observe: command not found: compdef.

Expected behavior

Completion should load cleanly, or docs/setup should clearly state that compinit must be initialized first.

Actual behavior

The generated completion uses compdef, which is unavailable unless zsh completion is initialized.

Workaround

This fixes it:

autoload -Uz compinit
compinit
source <(openclaw completion --shell zsh)

(optional guard)

if command -v openclaw >/dev/null 2>&1; then
  source <(openclaw completion --shell zsh)
fi