Mid-Session Save 150 Protocol

Core Principle: Don't wait for session end to save. Checkpoint early, checkpoint often.

What This Skill Does

This skill provides quick checkpoints during active work:

• Capture current progress without full handoff
• Track what worked and what didn't (raw material for lessons)
• Persist lessons learned so far
• Update session state for continuity
• Can be invoked multiple times per development cycle

Key Insight: Progress Log as Lesson Source

The session progress log captures:

• ✅ What worked (successful approaches)
• ❌ What didn't work (failed attempts, dead ends)
• 🔄 What was tried (experiments, approaches tested)