> For the complete documentation index, see [llms.txt](https://docs.coherent.global/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coherent.global/hybrid-runner/hybrid-runner-release-history.md).

# Hybrid Runner release history

Documented history for the [`nodegen-server`](https://github.com/orgs/Coherent-Partners/packages/container/package/nodegen-server) releases. We recommend following the list of [Neuron](/build-spark-services/neuron.md) compatibility versions that can be found in the repository [`nodegen-server-compatibility`](https://github.com/Coherent-Partners/nodegen-server-compatibility).

## `1.55.5` 2026-06-29

* Staleness limit for resolver cache such that newly updated models are refreshed sooner.

## `1.55.3` 2026-06-23

* Performance enhancements and vulnerability fixes.

## `1.55.1` 2026-06-22

* Fix issues with processing abnormal response from `getnodegenzip`.
* Performance enhancements and vulnerability fixes.

## `1.54.3` 2026-06-15

* Performance enhancements and vulnerability fixes.

## `1.54.1` 2026-06-04

* Performance enhancements and vulnerability fixes.

## `1.53.6` 2026-05-26

* Performance enhancements and vulnerability fixes.

## `1.53.5` 2026-05-15

* Performance enhancements and vulnerability fixes.

## `1.53.4` 2026-05-05

* Otel SDK reporting updates.
* Extend the resolver cache to improve `Xcall` performance when a specific service version is invoked.
* Performance enhancements and vulnerability fixes.

## `1.52.5` 2026-04-20

* Performance enhancements and vulnerability fixes.

## `1.52.4` 2026-04-09

* Performance enhancements and vulnerability fixes.

## `1.52.3` 2026-04-08

* Performance enhancements and vulnerability fixes.

## `1.52.2` 2026-04-01

* Performance enhancements and vulnerability fixes.

## `1.52.1` 2026-03-30

* Address issues relating to `Xcall` `EXTERNAL_RESOLVER_ERROR`.
* `Xcall` to return more specific error messages.
* Performance enhancements and vulnerability fixes.

## `1.51.9` 2026-03-25

* Performance enhancements and vulnerability fixes.

## `1.51.8` 2026-03-05

* Performance enhancements and vulnerability fixes.

## `1.51.7` 2026-03-05

* Performance enhancements and vulnerability fixes.

## `1.51.6` 2026-03-02

* Fix `whoami` error introduced in recent version.
* Implement retry to address `Xcall` `EXTERNAL_RESOLVER_ERROR`.
* Performance enhancements and vulnerability fixes.

## `1.51.3` 2026-02-05

* Performance enhancements and vulnerability fixes.

## `1.51.2` 2026-02-04

* Performance improvements achieved through skipping extra parsing.
* `debug_xcall` `call_id` now represented as an array.
* Performance enhancements and vulnerability fixes.

## `1.50.7` 2026-01-07

* Performance enhancements and vulnerability fixes.

## `1.50.6` 2025-12-10

* Performance enhancements and vulnerability fixes.

## `1.50.4` 2025-11-27

* Fixed an issue with models stored in `MODEL_LOCATION` were included in cleanup jobs.
* Performance enhancements and vulnerability fixes.

## `1.50.2` 2025-11-19

* Configuration updates to support custom cache and log directory.
* Performance enhancements and vulnerability fixes.

## `1.50.0` 2025-10-27

* Standardization of `Xcall` errors.
* Fixes for `correlation_id` in hybrid mode.
* Improvements to the calls to the resolver and handling caching keys.
* Fix an issue where root level responses objects were not present.
* Performance enhancements and vulnerability fixes.

## `1.49.0` 2025-09-30

* Hybrid support for [`XConnector`](/xconnector/introduction-to-xconnector.md).
* Improvements to service resolution and caching.
* Fixes to support proper `Xcall` `#call_id` in output.
* Performance enhancements and vulnerability fixes.

## `1.47.2` 2025-08-22

* Performance enhancements and vulnerability fixes.