- Updated IMPLEMENTATION-PLAN-STEP-LIBRARY-FRONTEND.md with design decisions:
- Custom steps persistence: separate `custom_steps` field in sessions
- Custom step navigation: full step type support (decision/action/solution)
- Validation warnings: inline dismissible, no confirmation modal
- Added backend migration task (B.10) for custom_steps field
- Updated file count: 10 new, 8 modified, 1 migration
- Clarified acceptance criteria for validation behavior
- Created docs/plans/2026-02-03-draft-trees-feature.md:
- Comprehensive design for draft trees and custom steps
- Database schema, API changes, frontend UX patterns
- Implementation phases and success metrics
- Related to Issue #25 (planned for Phase 3)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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