The pyenv fragment lived in the interactive overlay, so agents and zsh -c fell back to system Python. Install it through the always-on fragment path and keep XDG destinations aligned with the loader.
fnm lived in interactive-only ~/.config/zshrc, so ssh/agents/zsh -c
missed fnm-managed node. Source ~/.config/zsh/*.zsh from .zshenv and
install the fragment as zsh/fnm instead.
Frank Qing