suaveplan/openspec/archive/2026-04-24-enterprise-undo/proposal.md

Proposal: @suaveplan/undo

Change ID: enterprise-undo
Date: 2026-04-24
Status: Shipped

Summary

Implement the @suaveplan/undo package — a full enterprise-quality undo/redo engine for the genesis monorepo, replacing the old enterprise-undo reference implementation.

What was built

• Synchronous UndoStack<T> with memory limits, transactions, EventBus
• BranchingHistory<T> with fork-on-diverge
• AsyncUndoStack<T> for async commands
• HistoryCompressor<T> / compressHistory for memory management
• SelectiveUndoStack<T> for non-linear undo by command ID
• CommandMerger<T> with time/count windows
• Structured errors via UNDO_CODES (6 codes)
• Zod schemas, OTel instrumentation, property-based tests (fast-check)
• 100% istanbul coverage, all co-located .md docs