Agent frontmatter enhancements — disallowedTools, mcpServers scoping, fork_eligible field
Context management — pre-compact persistence, threshold alignment, microcompact/circuit breaker detection
Hook enhancements — updatedInput for bash safety prefixes, suppressOutput for verbose blocks, denial-based routing feedback
Hook system optimization — async conversion, consolidation, deduplication, new hook events
Memory index discipline — cap enforcement, pruning, archival, health reporting
Prompt assembler optimization — sorting, memoization, cache-break detection, integration tests
Compresses and merges CLAUDE.md and rules files to fit under the 40K character cap
Security hardening — path normalization, UNC blocking, pattern alignment with Claude Code