# PR#15: werkprobe Builds with Temurin 25

> **WARNING:** This document describes only the change applied in this PR.
> It may already be outdated once the next PR is merged.
> Historic PR documentation is not maintained along with new PRs; treat it as a snapshot.

## Related Links

- [werkregie PR#20](https://git.javagil.de/mi/werkregie/pulls/20) and [PR#22](https://git.javagil.de/mi/werkregie/pulls/22):
  ADR 0001, Temurin 25 as JDK and runtime of all werk repositories, loaded with Foojay.

## Problem

ADR 0001 decides Temurin 25 for all werk repositories.
werkprobe compiles with whatever JDK the build environment brings, today Debian's OpenJDK 21.

## Non-Goals

- No change of the bytecode: it stays Java 17, which the managed webspaces run.
- No change of the probes.

## Solution

- The toolchain is Temurin 25; Foojay 1.0.0 loads it where it is missing.
- `options.release = 17` stays.
- `.werkator.yml` and the README name Temurin 25.
- Checked locally: `dist`, the test compilation and `pitest` pass with Temurin 25; the classes are Java 17 bytecode.
  The container tests need werkdock's sandbox and run in the CI.