# migration-guide

Generates structured migration playbooks with rollback steps, breaking change diffs, and verification checklists. Useful when switching databases, frameworks, or cloud infrastructure.

- command · `type=command` · Claude Code · 281 installs
- Author: davila7
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/davila7/claude-code-templates/tree/HEAD/cli-tool/components/commands/documentation/migration-guide.md
- Updated: 2026-10-24
- HTML: https://affpapa.org/en/nevibecode/commands/migration-guide

## What it does

The command inspects project dependencies, SQL schemas, and deployment configurations before you start rewriting code. It scans files like `package.json`, `requirements.txt`, Docker manifests, or Terraform definitions using Bash commands to understand the baseline setup.

Next, it produces a clear upgrade blueprint. The output covers breaking changes with side-by-side code snippets, dependency conflict resolution, data transformation steps, and contingency plans. You can pass arguments like `framework`, `database`, `cloud`, `architecture`, or `--version-upgrade`.

Because it relies on `Bash`, `Read`, `Write`, and `Edit` tools to discover files, repos without standard manifests require manual prompts to fill in details.

## Install

### Claude Code (native platform)

1. **claude-code-templates**
```bash
npx claude-code-templates@latest --command documentation/migration-guide
```

2. **Manually: put the files in place**
- File: `.claude/commands/migration-guide.md` — Call it with /migration-guide. For all projects use ~/.claude/commands/

### Codex

**Manually: put the files in place**
- File: `~/.codex/prompts/migration-guide.md` — Call it with /prompts:migration-guide. Codex marks this format deprecated in favour of skills

### GitHub Copilot

**Manually: put the files in place**
- File: `.github/prompts/migration-guide.prompt.md`

### Gemini CLI

**Manually: put the files in place**
- File: `.gemini/commands/migration-guide.toml` — Gemini stores commands as TOML: the prompt text goes into the prompt field

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/davila7/claude-code-templates/tree/HEAD/cli-tool/components/commands/documentation/migration-guide.md

## When to use it
- generate a step-by-step framework upgrade procedure
- document breaking changes with before-and-after code comparisons
- plan database schema migrations and rollback steps
- establish testing and validation strategies for infra changes

## Example prompts
- /migration-guide framework
- /migration-guide database
- /migration-guide --version-upgrade

## Source text · migration-guide.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 0c8a83f18e83922e.

BEGIN THIRD-PARTY FILE 0c8a83f18e83922e
````text
---
allowed-tools: Read, Write, Edit, Bash
argument-hint: "[migration-type] | framework | database | cloud | architecture | --version-upgrade"
description: Create comprehensive migration guides with step-by-step procedures, validation, and rollback strategies
---

# Migration Guide Generator

Create comprehensive migration guide: $ARGUMENTS

## Current System Analysis

- Current versions: @package.json or @requirements.txt or detect from lock files
- Migration history: !`find . -name "*migration*" -o -name "*upgrade*" | head -5`
- Database schema: !`find . -name "*schema*" -o -name "*.sql" | head -3`
- Dependencies: !`grep -c "dependency\|require\|import" package.json requirements.txt 2>/dev/null || echo "0"`
- Infrastructure: @docker-compose.yml or @k8s/ or @terraform/ (if exists)

## Task

Generate systematic migration guide with comprehensive safety measures: $ARGUMENTS

1. **Migration Scope Analysis**
   - Identify what is being migrated (framework, library, architecture, etc.)
   - Determine source and target versions or technologies
   - Assess the scale and complexity of the migration
   - Identify affected systems and components

2. **Impact Assessment**
   - Analyze breaking changes between versions
   - Identify deprecated features and APIs
   - Review new features and capabilities
   - Assess compatibility requirements and constraints
   - Evaluate performance and security implications

3. **Prerequisites and Requirements**
   - Document system requirements for the target version
   - List required tools and dependencies
   - Specify minimum versions and compatibility requirements
   - Identify necessary skills and team preparation
   - Outline infrastructure and environment needs

4. **Pre-Migration Preparation**
   - Create comprehensive backup strategies
   - Set up development and testing environments
   - Document current system state and configurations
   - Establish rollback procedures and contingency plans
   - Create migration timeline and milestones

5. **Step-by-Step Migration Process**
   
   **Example for Framework Upgrade:**
   ```markdown
   ## Step 1: Environment Setup
   1. Update development environment
   2. Install new framework version
   3. Update build tools and dependencies
   4. Configure IDE and tooling
   
   ## Step 2: Dependencies Update
   1. Update package.json/requirements.txt
   2. Resolve dependency conflicts
   3. Update related libraries
   4. Test compatibility
   
   ## Step 3: Code Migration
   1. Update import statements
   2. Replace deprecated APIs
   3. Update configuration files
   4. Modify build scripts
   ```

6. **Breaking Changes Documentation**
   - List all breaking changes with examples
   - Provide before/after code comparisons
   - Explain the rationale behind changes
   - Offer alternative approaches for removed features

   **Example Breaking Change:**
   ```markdown
   ### Removed: `oldMethod()`
   **Before:**
   ```javascript
   const result = library.oldMethod(param1, param2);
   ```
   
   **After:**
   ```javascript
   const result = library.newMethod({ 
     param1: param1, 
     param2: param2 
   });
   ```
   
   **Rationale:** Improved type safety and extensibility
   ```

7. **Configuration Changes**
   - Document configuration file updates
   - Explain new configuration options
   - Provide configuration migration scripts
   - Show environment-specific configurations

8. **Database Migration (if applicable)**
   - Create database schema migration scripts
   - Document data transformation requirements
   - Provide backup and restore procedures
   - Test migration with sample data
   - Plan for zero-downtime migrations

9. **Testing Strategy**
   - Update existing tests for new APIs
   - Create migration-specific test cases
   - Implement integration and E2E tests
   - Set up performance and load testing
   - Document test scenarios and expected outcomes

10. **Performance Considerations**
    - Document performance changes and optimizations
````
END THIRD-PARTY FILE 0c8a83f18e83922e

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