feat: add swift-sdk to the built-in SDK matrix

src/sdk-runner/known-sdks.ts

@@ -127,6 +127,24 @@ export const KNOWN_SDKS: Record<string, SdkConfig> = {
       }
     }
   },
+  // Fixtures live in Sources/MCPConformance/{Client,Server} — the
+  // mcp-everything-client and mcp-everything-server products, mirroring
+  // scripts/run-conformance.sh. SwiftPM writes binaries to a per-triple
+  // directory but also maintains a `.build/debug` symlink pointing at it, so
+  // the paths below stay portable across host architectures. The server
+  // defaults to port 3001; `--port` pins it to the 3000 convention used above.
+  'swift-sdk': {
+    build:
+      'swift build --product mcp-everything-client && swift build --product mcp-everything-server',
+    client: {
+      command: './.build/debug/mcp-everything-client'
+    },
+    server: {
+      command: './.build/debug/mcp-everything-server --port 3000',
+      url: 'http://localhost:3000/mcp'
+    },
+    expectedFailures: 'conformance-baseline.yml'
+  },
   // Fixtures live in tests/ModelContextProtocol.ConformanceClient and
   // tests/ModelContextProtocol.ConformanceServer (requires the .NET 10 SDK,
   // per global.json); build output goes to the repo-level artifacts/ tree

src/sdk-runner/sdk-runner.test.ts

@@ -74,7 +74,7 @@ describe('lookupBuiltinConfig', () => {
   });
 
   it('returns null for unknown SDKs', () => {
-    expect(lookupBuiltinConfig('swift-sdk')).toBeNull();
+    expect(lookupBuiltinConfig('kotlin-sdk')).toBeNull();
   });
 
   it('exposes python-sdk-v1 with repo + defaultRef + specVersion and both commands', () => {
@@ -141,6 +141,18 @@ describe('lookupBuiltinConfig', () => {
     expect(rs?.server?.url).toBe('http://localhost:3000/mcp');
   });
 
+  it('exposes swift-sdk with the SwiftPM everything fixtures', () => {
+    const sw = lookupBuiltinConfig('swift-sdk');
+    expect(sw?.build).toContain('mcp-everything-client');
+    expect(sw?.build).toContain('mcp-everything-server');
+    // SwiftPM writes to a per-triple dir but keeps a .build/debug symlink to
+    // it, so these paths stay portable across host architectures.
+    expect(sw?.client?.command).toBe('./.build/debug/mcp-everything-client');
+    // The server defaults to 3001; --port pins it to the 3000 convention.
+    expect(sw?.server?.command).toContain('--port 3000');
+    expect(sw?.server?.url).toBe('http://localhost:3000/mcp');
+  });
+
   it('every built-in entry validates against SdkConfigSchema', () => {
     for (const [name, cfg] of Object.entries(KNOWN_SDKS)) {
       expect(() => SdkConfigSchema.parse(cfg), name).not.toThrow();