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Why it Matters

Magento has three modes: default, developer, and production. If the site runs in developer or default mode on production, error messages and stack traces may be exposed to visitors, revealing sensitive system details. Developer mode also skips optimizations, making the store slower and less stable.

Running in production mode hides internal errors from customers, improves caching, pre-compiles code for performance, and ensures sensitive debug output is never leaked.

Verification Steps

Command line

bin/magento deploy:mode:show
# Expected: Current application mode: production

Remediation / Fix Guidance

  1. Switch Magento to production mode: 
    bin/magento deploy:mode:set production --skip-compilation
  2. Run dependency injection compilation: 
    bin/magento setup:di:compile
  3. Deploy static content and clear caches: 
    bin/magento setup:static-content:deploy -f
bin/magento cache:flush
  4. Ensure deployment pipelines enforce production mode after each release.

Examples

Fail Example
$ bin/magento deploy:mode:show
Current application mode: developer
# Debug output may be visible to public
Pass Example
$ bin/magento deploy:mode:show
Current application mode: production

References