Plan — MT-1: PlatformProvider Interface + GitHubPlatformProvider#

Summary#

Create the PlatformProvider abstraction interface mirroring the GitHubService public API, implement GitHubPlatformProvider as a thin delegation wrapper, and wire both into a new PlatformModule. This is a pure additive change — no existing files are modified.

Files#

Steps#

1. Read src/github/github.service.ts and extract all public method signatures (17 methods across IssueOps, LabelOps, PullRequestOps, BranchOps, ProjectOps, FileOps groups).
2. Create src/platform/platform-provider.interface.ts — define PLATFORM_PROVIDER = Symbol('PLATFORM_PROVIDER'), PlatformProvider interface with readonly platform: string and all 17 method signatures. Mark setProjectItemStatus as optional (?).
3. Create src/platform/github/github-platform.provider.ts — @Injectable() class implementing PlatformProvider, constructor-injecting GitHubService, setting platform = 'github', and delegating every method with return this.github.<method>(...).
4. Create src/platform/platform.module.ts — import GitHubModule, register { provide: PLATFORM_PROVIDER, useClass: GitHubPlatformProvider }, export PLATFORM_PROVIDER.
5. Create src/platform/github/github-platform.provider.spec.ts — mock GitHubService, instantiate GitHubPlatformProvider, verify each of the 17 methods calls the corresponding mock method with correct args and returns its result.

Verification#

• npx tsc --noEmit passes with zero errors
• npm run lint passes with zero warnings
• npm run test -- --testPathPattern=platform — all delegation tests pass

Risks#

• Signature drift: If GitHubService gains new methods before this PR merges, the interface will be incomplete. Mitigation: verify against the latest rc/multi-tenant HEAD at implementation time.