---
title: Go-SDK - v1.0.0-rc1
slug: feature-experimentation/release-notes/go-sdk-v1-0-0-rc1
docTags: 
createdAt: 2026-07-20T15:44:31.828Z
---

\## \[1.0.0-rc1] - December 4th, 2019

\## New Features
\- feat(PollingConfigManager): Implemented caching headers in PollingConfigManager. \[#189]\([https://github.com/optimizely/go-sdk/pull/189](https://github.com/optimizely/go-sdk/pull/189))
\- feat(api): Add top-level wrapper for more convenient usage. \[#191]\([https://github.com/optimizely/go-sdk/pull/191](https://github.com/optimizely/go-sdk/pull/191))

\### Bug Fixes
\- fix(audience-evaluation): Fixed null-bubbling issues. \[#177]\([https://github.com/optimizely/go-sdk/pull/177](https://github.com/optimizely/go-sdk/pull/177))
\- fix: correct error returned when SDK key is invalid \[#203]\([https://github.com/optimizely/go-sdk/pull/203](https://github.com/optimizely/go-sdk/pull/203))
\- fix: Invalid datafile JSON should return an error \[#205]\([https://github.com/optimizely/go-sdk/pull/205](https://github.com/optimizely/go-sdk/pull/205))

[https://github.com/optimizely/go-sdk/releases/tag/v1.0.0-rc1](https://github.com/optimizely/go-sdk/releases/tag/v1.0.0-rc1)