- Add "Hierarchical Blocking" section to README explaining blocking propagation through parent-child hierarchies - Clarify that 'blocks' + 'parent-child' create transitive blocking up to 50 levels deep - Note that 'related' and 'discovered-from' do NOT propagate blocking - Add TestDeepHierarchyBlocking to verify 50-level deep hierarchy works correctly - All tests pass successfully 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>