Codex install registered gsd-check-update.js in config.toml but never
copied the hook file to ~/.codex/hooks/. The hook-copy block in install()
was gated by !isCodex, leaving a broken reference on every fresh Codex
global install.
Adds a dedicated hook-copy step inside the isCodex branch that mirrors
the existing copy logic (template substitution, chmod). Adds a regression
test that verifies the hook file physically exists after install.
Closes#2153
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
b896db6f91