Audit and reduce excessive experimental Swift feature flags

[leogdion]

Problem

Package.swift enables 23+ experimental Swift features. Many may not be necessary and could introduce instability or compilation issues.

Impact

• Increased build complexity
• Potential compiler bugs or instability
• Unclear which features are actually used
• Maintenance burden

Priority

LOW - Code quality improvement

Expected Fix

1. Audit each experimental feature flag
2. Identify which features are actually used in the codebase
3. Remove unused feature flags
4. Document why each remaining flag is necessary
5. Consider using more stable alternatives where possible

Current Feature Flags to Review

• Strict concurrency checking
• Existential any keyword
• Typed throws
• Noncopyable generics
• Move-only types
• Variadic generics
• Plus ~17 others

Files to Update

• Package.swift
• Document findings in CLAUDE.md or IMPLEMENTATION_NOTES.md

Related

From PR #6 review feedback: #6 (comment)

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🔗 Similar Issues

Related Issues

• Remove or utilize unused CloudKitConversionError cases #12
• Fix platform version mismatch in CelestraKit Package.swift #8
• Make build version configurable instead of hardcoded #15

🔗 Related PRs

brightdigit/Bushel#224 - Fixes to Swift Package and Explicit Modules for Xcode 26 + macOS 26 [merged]
brightdigit/SyndiKit#88 - Remove Unsafe Flags [merged]
brightdigit/PackageDSL#103 - Consolidate Swift Settings Documentation Updates [closed]
brightdigit/swift-build#31 - Improve robustness and platform handling [merged]
brightdigit/MistKit#187 - Disable enhanced compiler checking flags [merged]

👤 Suggested Assignees

• leogdion

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