[kvz]

Java SDK signature parity should exercise the Node 26 reference runtime. Pin CI and the development image to Node 26.12.1, preserving the Java 8/11 CI matrix, the published Java support floor, and the JDK 17 development image.

Add libatomic1 to the JDK image because the Node 26 binary requires it. The first image started with libatomic.so.1: cannot open shared object file; the rebuilt image starts Node v26.12.1 successfully.

Validation: the Docker image builds; ./gradlew --no-daemon check passes in a clean archive fixture (89 tests, 3 optional integration skips, no failures). This includes the existing Node CLI signature parity checks. Workflow YAML parsing and git diff --check pass. Council review: no issues found. Live API checks remain in normal CI.

Validated commit: 2262df3bfc476d47caa5bebf3171f48b20680879.

_{🤖 Claimed by kvz on framework1/java-sdk since 2026-10-21 · resume: codex resume 01a15ee6-8ad4-7ec2-a0c6-c6d3ac36a367}

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.68%. Comparing base (d9b9aae) to head (2262df3).

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #104      +/-   ##
============================================
+ Coverage     77.04%   78.68%   +1.63%     
- Complexity      217      220       +3     
============================================
  Files            13       13              
  Lines           793      793              
  Branches         71       71              
============================================
+ Hits            611      624      +13     
+ Misses          146      134      -12     
+ Partials         36       35       -1     

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