Pin Grok unit rates to official xAI pricing (docs.x.ai), parse headless
JSON usage when present (zero tokens when omitted — never invent), and
reject empty/invalid auth.json or whitespace-only API keys in available().
Add free tests for remaining code-review debt: runtimeRoot vs setup parity,
generateSpecSpawn fail-closed allowlist, GrokAdapter auth/HOME/prompt-file,
compat-audit fixture exit codes, and preflight-no-wipe setup smoke. Prefer
HOME for auth discovery so hermetic tests work under Bun; pipe stderr so
token-shaped CLI errors never inherit onto the parent console.
Fail closed on ARCHIVE_PATH allowlist when SPAWN_PATH is missing, require
non-empty monorepo root before runtime links, drop default --always-approve,
prefer --prompt-file for large Grok benchmark prompts, and make compat-audit
refuse theater-green when required bridge skills are absent.
Nehr