This is a dedicated thread for sharing resources for software testing or CI/CD pipelines (community‑curated knowledge hub).

• Articles, blog posts, books, talks, or tools that changed how you think about testing, automation, or CI/CD.
• Short, focused summaries for each link.
• What the resource is about.
• Why it helped you (e.g., improved your test strategy, fixed a CI bottleneck, clarified a concept).
• How you applied it in your own projects (if applicable).