Sysctl drop-in lives in left4me/deploy/files/etc/sysctl.d/99-left4me.conf
(absorbed kernel.yama.ptrace_scope from the metadata entry). Deliver
via target-side symlink instead of a verbatim copy.
Canary for the deployment-responsibility reshape (left4me design doc
2026-05-15-deployment-responsibility-design.md, step 1). Validated
end-to-end on ovh.left4me: symlink resolves to the checkout,
sysctl --system fires on apply, kernel target value matches, idempotent.
One-shot cleanup of stale /etc/sysctl.d/99-left4me-ptrace.conf
(orphan from earlier apply; bundles/sysctl does not auto-purge unmanaged
files).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>