Introduce createStub<T> (Proxy-based) and asInternals<T> (single-cast wrapper)
in test-utils/class-mocks.ts to replace all as unknown as casts in server test
files that construct fakes of private-field classes or access class internals.
- class-mocks.ts: one justified as unknown as T cast inside createStub; Proxy
throws on any unstubbed method call, adding real runtime safety vs bare cast
- session-stubs.ts: all 19 as unknown as casts replaced with createStub/asInternals
- websocket-server.notifications.test.ts + relay-reconnect.test.ts: createStub
for HTTPServer / pino.Logger / AgentManager stubs; asInternals for internals access
- snapshot-mutation-ownership.test.ts: createStub for SessionOptions field stubs
- session.workspace-git-watch.test.ts: createStub for all SessionOptions fields;
asInternals for SessionInternals access
- session.workspace-resolution-invariants.test.ts: createStub + asInternals
- acp-agent.test.ts, claude-agent.redesign.test.ts, codex-app-server-agent.test.ts,
acp-wrapper-smoke.test.ts: asInternals for all internal-access casts
Errors cleared: ~80 as unknown as casts removed across 11 files.
Lint: 0 errors on all 11 files. Typecheck: green.
Mohamed Boudra
53e1be4da6