dev/packages/coding-agent/test/suite

Coding agent suite tests

Use test/suite/ for the new harness-based test suite around AgentSession and AgentSessionRuntime.

Rules:

• Use test/suite/harness.ts
• Use the faux provider from packages/ai/src/providers/faux.ts
• Do not use real provider APIs, real API keys, network calls, or paid tokens
• Keep these tests CI-safe and deterministic
• Do not use or extend the legacy test/test-harness.ts path unless a missing capability forces it