What problem does it solve? Decisions and requirements agreed during plan mode disappear when a session ends or context compaction runs. This Skill persists those discussions as structured Markdown documents inside the project so they can be re-referenced across sessions. ## Core Features & Use Cases - Structured plan generation: Creates a dated plan document from a template with sections for Goals, Spec, assumptions and verification status, design, task breakdown, implementation approach, and testing. - Automatic indexing: Registers each new plan in a per-project .claude/plans/INDEX.md so resuming work starts from a single index file. - Slug sanitization and idempotency: The script sanitizes slugs, skips existing documents, and avoids duplicate INDEX entries. - Use Case: After settling requirements and design trade-offs in plan mode, persist the outcome as 2025-01-15-auth-redesign.md under the project's .claude/plans/ directory, then resume the work days later by reading the INDEX entry. ## Quick Start Ask the AI to save the current plan-mode discussion as a persistent plan document by running the new-plan script with a short slug for the topic.