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Rollback Checklist

Rollback Checklist

⚠️ IMPORTANT: Follow this checklist BEFORE performing any rollback to prevent "Frankenstein" code issues.

Last updated: 2025-12-08 (after SDK migration incident)

Pre-Rollback Assessment

Step 1: Understand What You're Rolling Back

# See commits between target and current
git log --oneline --stat <target_commit>..HEAD
 
# Look specifically for:
# - package.json changes (dependencies)
# - Component file renames/moves
# - Database schema changes
# - Configuration changes

Questions to answer:

  • Why are we rolling back? (bug, performance, other)
  • What's the target commit hash?
  • How many commits will be lost?
  • When was the target commit created?
  • Who can I ask about changes since then?

Step 2: Identify Breaking Changes

Check for these CRITICAL changes in the commits you're about to revert:

Dependency Changes

# Check for package.json changes
git diff <target_commit>..HEAD -- package.json
 
# Look for:
# - SDK version changes (e.g., @11labs/client → @elevenlabs/react)
# - Major version bumps
# - Removed packages
# - Added packages

Breaking Dependency Changes Found:

  • None
  • List them here: _______________

Architectural Changes

# Check for component renames/splits
git diff <target_commit>..HEAD --name-status -- "src/components/**/*.tsx"
 
# Look for:
# - Renamed files (R)
# - Deleted files (D)
# - New files (A)

Architectural Changes Found:

  • None
  • Component splits: _______________
  • Component renames: _______________
  • New patterns introduced: _______________

Database Changes

# Check for schema changes
git diff <target_commit>..HEAD -- "**/*migration*" "**/*schema*"

Database Changes Found:

  • None
  • New tables: _______________
  • New columns: _______________
  • Migrations to rollback: _______________

Configuration Changes

# Check for config changes
git diff <target_commit>..HEAD -- "*.config.*" ".env*" "capacitor.config*"

Config Changes Found:

  • None
  • Environment variables: _______________
  • Build config: _______________
  • Capacitor config: _______________

Pre-Rollback Safety

Step 3: Create Safety Net

# 1. Tag current state
git tag before-rollback-$(date +%Y%m%d-%H%M%S)
 
# 2. Create backup branch
git branch backup-before-rollback-$(date +%Y%m%d)
 
# 3. Save commits as patches (can re-apply later)
git format-patch <target_commit>..HEAD -o rollback-patches/
 
# 4. Push everything to remote
git push --tags
git push origin backup-before-rollback-$(date +%Y%m%d)

Safety Net Created:

  • Tag created: _______________
  • Backup branch created: _______________
  • Patches saved to: _______________
  • Pushed to remote

Step 4: Test Rollback in Isolation

NEVER rollback directly on main/master!

# 1. Create test branch
git checkout -b rollback-test-$(date +%Y%m%d)
 
# 2. Perform rollback
git reset --hard <target_commit>
 
# 3. Check if dependencies need reinstall
npm ci
 
# 4. Try to build
npm run build 2>&1 | tee rollback-build-log.txt
 
# 5. Check for missing files
npm run check-layout

Build Result:

  • ✅ Build succeeded
  • ❌ Build failed - Errors: _______________

Missing Files/Imports:

  • None found
  • List missing: _______________

Step 5: Verify Critical Functionality

# Start dev server
npm run dev

Manual Testing Checklist:

  • App loads without errors
  • Login works
  • Baseline welcome screen shows correct text ("Five questions", not "Six")
  • Baseline assessment conversation starts
  • Dashboard loads after baseline complete
  • Check-ins work
  • No console errors in browser

Test Results:

  • ✅ All tests passed
  • ❌ Tests failed - Issues: _______________

Performing the Rollback

Step 6: Execute Rollback (if tests passed)

If the rollback test branch worked correctly:

# Switch to main
git checkout main
 
# Pull latest (in case anything changed)
git pull
 
# Perform the rollback
git reset --hard <target_commit>
 
# Force push (with lease for safety)
git push --force-with-lease
 
# Redeploy
npm run build
npx vercel --prod
npx cap sync ios

Rollback Executed:

  • Git reset completed
  • Force push completed
  • Deployment completed
  • iOS sync completed

Step 7: Post-Rollback Verification

# Run automated checks
npm run check-layout
npm run typecheck
 
# Test critical flows
npm run test:e2e

Production Verification:

  • Production site loads
  • Critical flows work
  • No errors in Vercel logs
  • Mobile app works

Common Rollback Scenarios

Scenario A: Rolling Back SDK Migration

Example: Reverting from @elevenlabs/react back to @11labs/client

Special Steps:

  • Check ALL files that import ElevenLabs SDK:

    rg "elevenlabs" -t tsx -t ts

  • Verify old SDK is in package.json:

    npm list @11labs/client

  • If missing, reinstall:

    npm install @11labs/client@<version>
npm uninstall @elevenlabs/react

  • Update check-layout.js:

    • Remove checks for new SDK
    • Add checks for old SDK

Files to manually verify:

  • BaselineAssessmentSDK.tsx
  • CheckinAssessment.tsx
  • Any other files importing SDK

Scenario B: Rolling Back Component Split

Example: Reverting BaselineWelcome.tsx split back to monolithic BaselineAssessmentSDK.tsx

Special Steps:

  • Get the old combined component:

    git show <pre-split-commit>:src/components/mobile/BaselineAssessmentSDK.tsx > temp-combined.tsx

  • Compare what's different:

    diff temp-combined.tsx src/components/mobile/BaselineAssessmentSDK.tsx

  • Merge the welcome screen logic back in

  • Update imports in MobileAppStructure.tsx

  • Delete the split file:

    git rm src/components/mobile/BaselineWelcome.tsx

Scenario C: Rolling Back Database Changes

Special Steps:

  • Run down migrations FIRST:

    # Before git reset!
npm run migrate:down

  • Then perform git rollback

  • Verify database schema matches code

Emergency Recovery

If Rollback Causes Production Issues

# 1. Immediately revert the rollback
git reset --hard before-rollback-<timestamp>
git push --force-with-lease
 
# 2. Redeploy
npm run build
npx vercel --prod
 
# 3. Investigate what went wrong
# - Check Vercel logs
# - Check browser console
# - Check mobile app logs
 
# 4. If needed, cherry-pick specific fixes
git cherry-pick <commit-hash-of-fix>

If You Need Specific Changes from Lost Commits

# Option 1: Apply patches
git apply rollback-patches/0001-*.patch
 
# Option 2: Cherry-pick from backup branch
git cherry-pick backup-before-rollback-<date>~3  # Pick 3rd commit from end
 
# Option 3: Interactive rebase to pick commits
git rebase -i backup-before-rollback-<date>

Checklist Summary

Before any rollback, ensure:

  • ✅ I understand WHY we're rolling back
  • ✅ I've identified all breaking changes
  • ✅ I've created safety tags/branches
  • ✅ I've tested rollback in a branch first
  • ✅ I've verified critical functionality works
  • ✅ I've saved patches for re-applying changes
  • ✅ I've documented what went wrong
  • ✅ I have a recovery plan if rollback fails

Sign-off:

  • Requested by: _______________
  • Approved by: _______________
  • Executed by: _______________
  • Date: _______________

Lessons Learned Template

After completing a rollback, document what happened:

What went wrong?

Why did we roll back?

What breaking changes did we encounter?

How long did recovery take?

What could we have done to prevent this?

What safeguards should we add?

References

Development SafeguardsPost-Mortem: Dec 8 2025