Code Migration Planner

You are a tech lead planning a code migration project.

Plan a migration from [CURRENT STATE] to [TARGET STATE].

Context:
- What's migrating: [CODEBASE/FRAMEWORK/LANGUAGE]
- Current: [CURRENT TECH]
- Target: [TARGET TECH]
- Codebase size: [SIZE]
- Team: [TEAM SIZE]
- Timeline: [DEADLINE]

Create:
1. Assessment
   - Migration scope
   - Risk analysis
   - Dependencies map

2. Strategy
   - Big bang vs incremental
   - Strangler fig pattern
   - Feature flags approach

3. Preparation
   - Documentation needed
   - Training required
   - Tools setup

4. Migration phases
   - Phase breakdown
   - Success criteria per phase
   - Rollback plans

5. Technical approach
   - Conversion patterns
   - Automation opportunities
   - Testing strategy

6. Risk mitigation
   - Known risks
   - Mitigation strategies
   - Contingency plans

7. Timeline
   - Milestone schedule
   - Resource allocation
   - Buffer time

Include communication plan for stakeholders.