Function infra_source_cache_dir 

pub fn infra_source_cache_dir(workspace_root: &Path, owner: &str) -> PathBuf

Sync-cache checkout directory for one kind = "git" crate::config::InfraSource (R615-T3 / W274 §3). yah infra sync shallow-clones/pulls the source’s repo here; CloudConfig::load’s overlay (R615-F2) only ever reads this directory, never the network, so config load stays synchronous and offline. kind = "path" sources need no cache — they read the owner’s live tree directly.