The Cold Start Problem and How to Fix It

You open Claude Code. You explain your project. You remind it about the bug you were fixing yesterday. You re-paste the error message. You describe the file structure. Again.

Sound familiar? That's the cold start problem. And it's eating 10-15 minutes of every session.

Why It Happens

Claude Code doesn't have persistent memory by default. Each session is a blank slate. The model doesn't remember yesterday's conversation, your preferences, or where you left off.

But here's the thing — it can remember. You just have to set it up.

The 3-Step Fix

Step 1: Memory files. Create a memory/ directory. At the end of each session, Claude writes what it learned. At the start of the next session, it reads those files. Zero re-explanation needed.

Step 2: Handoffs. When you finish a work block, write a handoff document — what was done, what's next, what's blocked. Next session picks up exactly where you left off.

Step 3: Session lifecycle in CLAUDE.md. Add instructions to your CLAUDE.md: "At session start, read memory/. At session end, write a handoff." Now it happens automatically.

The Result

Sessions that used to start with 10 minutes of context-setting now start with "continue from the handoff." That's it. One line. Full context restored.

The session lifecycle isn't a nice-to-have. It's the difference between using Claude Code as a stateless tool and using it as a continuous collaborator.

Fix the cold start. Everything else gets easier.