Add per-test pass/fail parsing from vitest verbose output, thread prompt
content and individual test results through the runner, and rewrite
uploadToBraintrust with experiment naming (model-variant-timestamp),
granular scores (pass, test_pass_rate, per-test), rich metadata, and
tool-call tracing via experiment.traced(). Also document --force flag
for cached mise tasks and add Braintrust env vars to AGENTS.md.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>