Describes a pkg/workspace.Manager that replaces per-reconcile full clones
with persistent bare repos on a PVC, falling back to in-memory when no
PVC is mounted. Covers API changes (spec.cache on GitRepository),
deployment changes (optional PVC per controller), concurrency/locking,
cache lifecycle, and migration path.
https://claude.ai/code/session_01PaXbaSqhVEqj97kpY4v6rt
