snowflake-v2-skill-pattern-reduces-entry-point-token-cost-95pct

The Snowflake v2.0 progressive-disclosure pattern splits a monolithic skill file into a lightweight entry point (~54 lines) plus phase-specific reference files loaded on-demand only when each phase executes. Applied to session-close SKILL.md: 1,230 lines → 54-line entry + 8 phase references (124–461 lines each). This achieves a 95.6% reduction in entry-point token cost per session invocation while preserving full content. Appropriate for any skill with 5+ distinct phases that don’t all execute every invocation.