T-2: GitHubIntegration SPM package skeleton

[kirich1409]

Description

Create SPM package MacApp/Packages/GitHubIntegration/Package.swift:

• swift-tools-version: 6.3
• .swiftLanguageMode(.v6) on all targets
• Platforms: .macOS(.v26)

Targets (internal):

• GitHubIntegrationClient — Foundation + SharedModels only (no TCA, no SwiftUI)
• GitHubIntegrationFeature — Client + ComposableArchitecture + SwiftUI + SharedModels

Public library target GitHubIntegration re-exports GitHubIntegrationFeature. Test target GitHubIntegrationTests (covers Client).

Pre-create placeholder files so W2 tasks modify only their own files (avoid Package.swift merge conflicts):

• Sources/GitHubIntegrationClient/GitHubOAuthConfig.swift
• Sources/GitHubIntegrationClient/GitHubClient.swift
• Sources/GitHubIntegrationClient/GitHubAPIError.swift
• Sources/GitHubIntegrationClient/Models/.keep
• Sources/GitHubIntegrationClient/GitHubCredentialStore.swift
• Sources/GitHubIntegrationClient/GitHubLogger.swift
• Sources/GitHubIntegrationClient/PKCE.swift
• Sources/GitHubIntegrationClient/GitHubAuthService.swift
• Sources/GitHubIntegrationFeature/GitHubFeature.swift
• Sources/GitHubIntegrationFeature/Views/.keep
• Tests/GitHubIntegrationTests/Placeholder.swift

Each file contains an empty type or // TODO so the package compiles. Register package as a local dependency in MacApp/Relay.xcodeproj.

Spec reference

See swarm-report/github-integration-decomposition.md#t-2.

Relationships

• Parent issue: EPIC: GitHub Integration MVP (read-only CI status + popover + OAuth) #214
• Blocked by: none
• Blocks: T-3, T-5, T-6, T-15
• Related: none

Acceptance criteria

• xcodebuild build -project MacApp/Relay.xcodeproj -scheme Relay -destination 'platform=macOS,arch=arm64' CODE_SIGN_IDENTITY=- passes
• Directory structure with placeholder files exists
• Package visible in Xcode Project Navigator
• swiftlint lint --strict green on new package
• xcodebuild test runs GitHubIntegrationTests without errors

Complexity

S

Suggested agent

developer-workflow:build-engineer

Module / Layer

GitHubIntegration / Package config