Block a user
Support merging multiple parents instead of appending
Include source file and line numbers in error messages
Evaluate directives inside $match values
$defer causes ~1.6x slowdown with large $repeat
$delete is silently ignored for keys brought in by $merge
Docs: CLI multi-file behavior is misleading about inheritance
$repeat with integer fails in TOML (int64 vs int)
Create deterministic kustomize to bkl converter
Add tests: $match should match sibling OR parent docs, not both
Support plus signs in filenames for aggregation