Running the suite was leaking wall-clock time, repo sol/ files, and sandbox journal state into API responses, so the baselines drifted away from the Flask test-client oracle. This fixes the determinism holes in the test harness and baseline update path. - reset the prompt sol-vars cache and patch think.prompts.SOL_DIR to the isolated journal sol/ so repo sol/ cannot leak into preview responses - copy only git-tracked fixture journal content into an isolated temp journal and use an absolute _SOLSTONE_JOURNAL_OVERRIDE - pin wall-clock time to 2026-04-15 with freezegun for both pytest and baseline regeneration, covering date.today()/datetime.now() paths and genai_prices timestamp lookups - drive make update-api-baselines through the Flask test client with the same isolation harness instead of the live sandbox so regenerated baselines match pytest Also regenerates the affected API baselines and dedupes the shared conftest helpers. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>