1.6.0 / 2020-04-28

• [FEATURE] testutil: Add lint checks for metrics, including a sub-package promlint to expose the linter engine for external usage. #739 #743
• [ENHANCEMENT] API client: Improve error messages. #731
• [BUGFIX] process collector: Fix process_resident_memory_bytes on 32bit MS Windows. #734

1.5.1 / 2020-03-14

• [BUGFIX] promhttp: Remove another superfluous WriteHeader call.

1.5.0 / 2020-03-03

• [FEATURE] promauto: Add a factory to allow automatic registration with a local registry. #713
• [FEATURE] promauto: Add NewUntypedFunc. #713
• [FEATURE] API client: Support new metadata endpoint. #718

1.4.1 / 2020-02-07

• [BUGFIX] Fix timestamp of exemplars in CounterVec. #710

1.4.0 / 2020-01-27

• [CHANGE] Go collector: Improve doc string for go_gc_duration_seconds. #702
• [FEATURE] Support a subset of OpenMetrics, including exemplars. Needs opt-in via promhttp.HandlerOpts. EXPERIMENTAL #706
• [FEATURE] Add testutil.CollectAndCount. #703

1.3.0 / 2019-12-21

• [FEATURE] Support tags in Graphite bridge. #668
• [BUGFIX] API client: Actually return Prometheus warnings. #699

1.2.1 / 2019-10-17

1.2.1 / 2019-10-17

• [BUGFIX] Fix regression in the implementation of Registerer.Unregister. #663

1.2.0 / 2019-10-15

• [FEATURE] Support pushing to Pushgateway v0.10+. #652
• [ENHANCEMENT] Improve hashing to make a spurious AlreadyRegisteredError less likely to occur. #657
• [ENHANCEMENT] API client: Add godoc examples. #630
• [BUGFIX] promhttp: Correctly call WriteHeader in HTTP middleware. #634

1.1.0 / 2019-08-01

• [CHANGE] API client: Format time as UTC rather than RFC3339Nano. #617
• [CHANGE] API client: Add warnings to LabelValues and LabelNames calls. #609
• [FEATURE] Push: Support base64 encoding in grouping key. #624
• [FEATURE] Push: Add Delete method to Pusher. #613

1.0.0 / 2019-06-15

This release removes all previously deprecated features, resulting in the breaking changes listed below. As this is v1.0.0, semantic versioning applies from now on, with the exception of the API client and parts marked explicitly as experimental.

• [CHANGE] Remove objectives from the default Summary. (Objectives have to be set explicitly in the SummaryOpts.) #600
• [CHANGE] Remove all HTTP related feature in the prometheus package. (Use the promhttp package instead.) #600
• [CHANGE] Remove push.FromGatherer, push.AddFromGatherer, push.Collectors. (Use push.New instead.) #600
• [CHANGE] API client: Pass warnings through on non-error responses. #599
• [CHANGE] API client: Add warnings to Series call. #603
• [FEATURE] Make process collector work on Microsoft Windows. EXPERIMENTAL #596
• [FEATURE] API client: Add /labels call. #604
• [BUGFIX] Make AlreadyRegisteredError usable for wrapped registries. #607