The test checks that a request reaches the executor model through
LiteLLM and text comes back. It also asserted the model obeyed "Reply
with exactly one word: pong", which Haiku once answered with "ping" and
failed CI on #66. Assert non-empty text instead.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE