CI/CD Pipelines That Actually Work: From “Why Is This Broken?” to “I Feel Like Neo”

Short summary

Practical guide to reliable CI/CD pipelines across GitHub Actions, GitLab CI, and Jenkins. Key techniques: split caching strategies, matrix builds with fail-fast logic, and self-contained jobs reduce typical runtime from 20 to 5 minutes. Includes before/after code examples addressing flaky tests, Docker permission errors, and caching pitfalls.

• •Split caching (lockfile + node_modules layers) and matrix builds with fail-fast reduce CI/CD runtime by 75%
• •Self-contained jobs prevent flaky tests across environments; explicit caching stores only what changes
• •Code examples provided for GitHub Actions, GitLab CI, and Jenkins with trap-avoidance guidance

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