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LaunchDarkly feature flag evaluation engine
Last release 1 months ago
19 Aug 2026
Release timing varies
gaps range from 2 weeks to 12 months
Nearly every release is documented
notes for 14 of 14 stable releases
Nothing withdrawn
no release was ever pulled
5 years old
19 releases · first in 2022
Report slash- and tilde-prefixed redacted attributes as escaped references
Add optional float-roundtrip feature
One column per quarter.
This PR was generated with Release Please . See documentation .
This PR was generated with Release Please . See documentation .
Add unbounded context kind to segment type
This PR was generated with Release Please . See documentation .
Add support for flag / segment builders
2.0.2 (2026-01-26) Bug Fixes Bump MSRV from 1.82 to 1.88 ( #31 ) ( a8203f3 ) Bump MSRV from 1.88 to 1.91 ( #32 ) ( e83366b ) Bump MSRV to 1.82.0
2.0.1 (2025-01-28) Bug Fixes Bump MSRV to 1.74.0 ( #26 ) ( 44e5650 ) Update base16ct to v0.2.0 ( aac23e0 ) Update itertools to v0.14.0 ( aac23e0 ) Upd
Add exclude from summary field to flag
Support redacting all attributes from anonymous contexts
Fixed an issue with evaluation of segments which included/excluded users when that user was part of a multi-context.
Updated MSRV from 1.60.0 to 1.64.0
This release of the evaluation engine corresponds to the upcoming v1.0.0 release of the LaunchDarkly server-side Rust SDK (launchdarkly-server-sdk), a
This release of the evaluation engine corresponds to the upcoming v1.0.0 release of the LaunchDarkly server-side Rust SDK (launchdarkly-server-sdk), and is not compatible with earlier SDK versions.
Context, Kind, ContextBuilder, MultiContextBuilder, Reference, and supporting types. Context defines the new context-based evaluation model. Context replace User, which was removed.urlencoding @ 2.1.0maplit @ 1.0.1itertools @ 0.10.3serde_with @ 2.1.0chrono from 0.4.15 to 0.4.23; only enable the "std" featuresemver from 0.10.0 to 1.0.14evaluate now takes a Context instead of a Usersecondary_key_bucketing flag. This will only affect contexts that were created via deserialization, since it is not possible to set "secondary" via a builder method.User, UserBuilder, UserAttributes. See Context, ContextBuilder and MultiContextBuilder instead.Change store signature to support persistent stores.
Bump sha1 and test\_case dependencies.
custom key.Add support for globally and user specific private attributes.
Modified the try_map function to accept a default value when returning a new Detail instance.
try_map function to accept a default value when returning a new Detail instance.Initial release of flag evaluation support code that will be used with the LaunchDarkly Server-Side SDK for Rust.
Initial release of flag evaluation support code that will be used with the LaunchDarkly Server-Side SDK for Rust.
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