The adapters parsed each vendor's proprietary JSON stream (Claude json,
Codex JSONL, Gemini stream-json) to extract tokens/tool-calls, and a
per-model pricing table turned tokens into cost. That coupling was the
brittle hardcoding GStack 2 exists to avoid — it broke every time a vendor
reshuffled its output, and it duplicated what any tool that instruments the
real model call already does. Braintrust owns scoring; it can't see a CLI
subprocess's tokens anyway, so computing cost ourselves meant maintaining
both a parser and a price table forever.
Now each adapter runs the CLI in plain-text mode and returns stdout. Scoring
is unchanged (Braintrust reads the text). RunResult drops tokens/toolCalls;
the comparison table drops the Tokens/Cost columns. Deletes pricing.ts, all
three JSON parsers, and the Gemini stream-schema parser + its test. Gemini
auth detection (env/OAuth/.env) is kept — that's not schema parsing.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The benchmark adapter only recognized GOOGLE_API_KEY and parsed the legacy
text/usage event shape. Recognize GEMINI_API_KEY and ~/.gemini/.env, parse
the current content/stats schema, ignore echoed user messages, and run
report-only plan mode with --skip-trust for disposable workspaces.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
