build: document built-in CNI bridge networking for BuildKit#25241
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The CNI networking section claimed CNI was "not yet" available in the default BuildKit image. A built-in bridge network provider with bundled CNI plugins has shipped since BuildKit v0.13.0 (moby/buildkit#4352), so the claim is outdated. Document the bridge mode (--oci-worker-net=bridge) that needs no custom image, and keep the custom-image path under a "Custom CNI configuration" subheading. Follow-up to moby/buildkit#6817. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Assessment: 🟢 APPROVE
The PR adds clear, accurate documentation for BuildKit's new built-in CNI bridge networking support. The new Bridge networking and Custom CNI configuration subsections are well-structured and match the existing document's tone and scope.
Reviewed areas:
- Flag syntax (
--oci-worker-net=bridgevia--buildkitd-flags) — looks correct - Technical details (
buildkit0bridge,10.10.0.0/16subnet) — consistent with upstream - Command example structure — follows established patterns in the file
- Style guide compliance — no hedge words, AI-isms, or marketing language detected
- Markdown structure — no formatting issues
No issues found in the changed lines.
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Follow-up to moby/buildkit#6817