The Jenkins Pipeline Failure Analyzer automates the diagnosis of Jenkins CI/CD pipeline failures by interfacing with the Jenkins REST API. It authenticates via API tokens and queries /job/{name}/lastFailedBuild/api/json to retrieve build metadata, then fetches /job/{name}/{build}/consoleText for full console output parsing. The agent uses pattern matching to classify failures into categories: compilation errors, test failures, dependency resolution issues, timeout errors, and infrastructure problems. For Pipeline (Jenkinsfile) jobs, it queries the Blue Ocean REST API at /blue/rest/organizations/{org}/pipelines/{name}/runs/{id}/nodes to extract stage-level execution data, identifying exactly which stage and step failed. It analyzes Jenkinsfile syntax for common issues like missing credentials references, incorrect agent specifications, and stale lock files. The analyzer correlates failures with recent SCM changes via /job/{name}/{build}/api/json changeSet to identify likely culprit commits. It generates fix suggestions and can automatically retry transient infrastructure failures.