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LaunchDarkly Server-Side SDK
Last release 20 days ago
17 Sep 2026
Ships fairly regularly
a new release about every 5 weeks
Nearly every release is documented
notes for 29 of 29 stable releases
Nothing withdrawn
no release was ever pulled
5 years old
34 releases · first in 2022
One column per quarter.
Add FDv2 source traits and result types
This PR was generated with Release Please. See documentation.
Add FDv2 wire format and protocol handler
This PR was generated with Release Please. See documentation.
Redact private attributes in migration op events
This PR was generated with Release Please. See documentation.
This PR was generated with Release Please . See documentation .
add X-LaunchDarkly-Instance-Id header (SDK-2359)
keep StreamingDataSource alive on non-Eof stream errors
This PR was generated with Release Please . See documentation .
This PR was generated with Release Please . See documentation .
Remove deprecated initialized_async function
This PR was generated with Release Please. See documentation.
Replace ring usage with aws lc rs for FIPS compliance
Inline context for custom and migration op events
Bump eventsource-client 0.13 -> 0.14
### Features * Add support for daemon mode (#110) (1a16e39) ### Bug Fixes * Bump MSRV to 1.81
Enable event-compression during docs.rs generation
Add option to enable compression of event payloads
support prerequisite relation data in all_flags_detail
Allow event retries even if initial request fails to connect
Add option to omit anonymous users from index and identify events
Inline contexts for all evaluation events
Export config::BuildError as ConfigBuildError
Fixed an issue with evaluating user targets as part of a multi-kind context.
Removed reliance on built crate.
built crate.The secure mode hashing algorithm has been updated to use the context's fully qualified key.
Updated MSRV from 1.60.0 to 1.64.0
The latest version of this SDK supports LaunchDarkly's new custom contexts feature. Contexts are an evolution of a previously-existing concept, "users
The latest version of this SDK supports LaunchDarkly's new custom contexts feature. Contexts are an evolution of a previously-existing concept, "users." Contexts let you create targeting rules for feature flags based on a variety of different information, including attributes pertaining to users, organizations, devices, and more. You can even combine contexts to create "multi-contexts."
For detailed information about this version, please refer to the list below. For information on how to upgrade from the previous version, please read the migration guide.
hyper @ 0.14.17hyper-rustls @ 0.23.1Context, ContextBuilder, MultiContextBuilder, Reference, Kindlru from 0.7.2 to 0.8.1launchdarkly-server-sdk-evaluation from 1.0.0-beta.5 to 1.0.0moka from 0.7.1 to 0.9.6uuid from 1.0.0-alpha.1 to 1.2.2alias methodUser, UserBuilder. See Context, ContextBuilder, and MultiContextBuilder instead.reqwest dependencythreadpool dependencyNothing published for this version
Enforce ApplicationInfo length restrictions.
Add support for persistent data stores, which allow flag and segment information to be stored in external databases like redis.
ApplicationInfo, for configuration of application metadata that may be used in LaunchDarkly analytics or other product features. This does not affect feature flag evaluations.Initial support for contract test harness.
Initial beta release of the LaunchDarkly Server-Side SDK for Rust.
Initial beta release of the LaunchDarkly Server-Side SDK for Rust.
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