Java: add win32-arm64 native runtime support

[edburns]

Fixes #2422 .

Adds win32-arm64 support to the Java SDK’s experimental in-process runtime, matching the existing native packaging and publication model.

• Packaging

  • Adds host-aware win32-arm64 Maven profiles.
  • Packages runtime.node, copilot, and platform metadata.
  • Requires a Windows ARM64 host.

• Validation

  • Extends host, artifact, fetch, and local-publication validation.
  • Includes win32-arm64 in coordinated classifier publication.

• CI and publishing

  • Adds win32-arm64 to the java-sdk-inprocess matrix using ubuntu-24.04-arm.
  • Builds and publishes the classifier in snapshot and release workflows.

• Documentation

  • Documents the classifier dependency, supported host, and development workflow.

<dependency>
    <groupId>com.github</groupId>
    <artifactId>copilot-sdk-java-runtime</artifactId>
    <version>${copilot.version}</version>
    <classifier>win32-arm64</classifier>
</dependency>

[Copilot]

Pull request overview

Extends Java’s experimental in-process runtime to Linux and Windows ARM64.

Changes:

• Adds ARM64 Maven packaging and host validation.
• Expands tests and artifact validation to five classifiers.
• Updates CI, publishing workflows, and documentation.

Show a summary per file

File	Description
java/sdk/pom.xml	Selects ARM64 runtime classifiers.
java/README.md	Documents ARM64 support and workflows.
java/docs/adr/adr-007-native-bundling-strategy.md	Updates supported publication scope.
java/copilot-native/pom.xml	Packages and attaches ARM64 classifiers.
java/copilot-native/scripts/validate-native-host.mjs	Validates ARM64 build hosts.
java/copilot-native/scripts/validate-native-host.test.mjs	Tests ARM64 host validation.
java/copilot-native/scripts/validate-native-artifact.test.mjs	Tests ARM64 artifacts and publication.
java/copilot-native/scripts/validate-local-publication.mjs	Requires both ARM64 classifiers.
java/copilot-native/scripts/fetch-native.test.mjs	Covers ARM64 staging behavior.
.github/workflows/java-sdk-tests.yml	Adds ARM64 tests and assembly inputs.
.github/workflows/java-publish-snapshot.yml	Publishes ARM64 snapshots.
.github/workflows/java-publish-maven.yml	Publishes ARM64 releases.

Review details

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• Files reviewed: 12/12 changed files
• Comments generated: 0
• Review effort level: Balanced

[github-actions]

Cross-SDK Consistency Review ✅

This PR adds win32-arm64 native runtime support to the Java SDK's in-process runtime packaging and CI infrastructure.

Scope of changes: Java-only (CI workflows, Maven POMs, native bundling scripts, documentation).

Consistency verdict: No cross-SDK consistency issues. The Java in-process native runtime (copilot-native) is a Java-specific architectural component with no equivalent in the other SDK implementations (Node.js, Python, Go, .NET, Rust). This change does not add or modify any public SDK API surface, so no corresponding updates are needed in other language SDKs.

Generated by SDK Consistency Review Agent for #2427 · sonnet46 17.3 AIC · ⌖ 4.01 AIC · ⊞ 6.6K · ◷