Description

packages/sdk/src/session.ts is the core session class in the public SDK (272 lines), but has zero unit tests. Only integration tests exist in the package.

What's missing

• Constructor validation (instructions must be string or function)
• id getter behavior
• initialize() idempotency
• sendStream() basic behavior

Proposed fix

Add packages/sdk/src/session.test.ts with unit tests using mocked Config from @google/gemini-cli-core.