- Agent 6.0 is a full rewrite in Go, adding higher DogstatsD throughput, check concurrency, and a native Prometheus metrics ingest.
- Introduces a web‑based configuration UI (localhost port 5002), Windows systray icon, and health‑check subsystem; configuration switches from datadog.conf to datadog.yaml.
- Breaking changes include removal of SysV init scripts, Alpine image, and custom check precedence; several integrations (Jenkins, Mesos, HDFS) are deprecated or retired.
6.0.0
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Auto‑enable logon duration when infrastructure mode end‑user device is set, still overridable via config.
Fixed Windows Agent install/upgrade where DDAGENTUSER arguments were overridden by stale registry or service account values.
Enable automatic multi‑line log detection by default; can be disabled via logs.config.auto_multi_line_detection or the corresponding env var.