- Removed multiple stabilized feature gates and renamed deprecated memory‑limiter metrics, introducing breaking API changes;
- Added the new cmd/schemagen CLI (moved from contrib) with overlayFile merging and custom package pattern support, and extended cmd/mdatagen to handle versioned metrics;
- Introduced schema‑based middleware config, a DisallowUnknownFields option for JSON unmarshalling, and fixed various bugs in mdatagen and schemagen
v1.61.0/v0.155.0
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Breaking: Histogram bucket boundaries for exporter and batch processor metrics changed to power‑of‑two 128 B‑16 MiB range; dashboards/alerts must be updated.
Added stability level support, semantic references, and configurable Go struct fields for resource attributes in cmd/mdatagen, plus enum validation and distinct Go types for primitive config schemas.
Breaking: `cmd/builder` skip‑get‑modules flag no longer rewrites go.mod, preserving the file as advertised.