Preserve Package.resolved v3 format on Xcode 15.3+/16+#3
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…ge.resolved v3 SPM keys the Package.resolved format version off the manifest's swift-tools-version (5.9 -> v2, 5.10+ -> v3 with originHash). Projects on Xcode 15.3+/16+ already ship a v3 file; the old default silently downgraded it on every run. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Package.resolvedis format v3 (Xcode 15.3+/16+) was silently downgrading the file to v2 — see myswimpro/MySwimPro-ios#9181 where"version" : 3flipped to"version" : 2.Package.resolvedformat off the synthetic manifest'sswift-tools-version.5.9→ v2;5.10+→ v3 (withoriginHash). The default was5.9.--tools-versionto5.10. Verified locally that SPM now writes a proper v3 file withoriginHash.Test plan
python3 update_spm.py --search-dir test/fixture --print-manifestshows// swift-tools-version:5.10python3 update_spm.py --search-dir test/fixture --dry-runproduces aPackage.resolvedwith"version" : 3and anoriginHashfieldversionfield🤖 Generated with Claude Code