Grok self-diagnosed and fixed the empty-text failure: the reasoning modes
(text/verify/review*) pinned -m grok-build, which the CLI (0.2.111) now rejects
as an unknown model id, producing empty output with a blank stopReason. Updated
the pin to grok-4.5 (the current default per `grok models`). Media/xsearch keep
GROK_MODEL="" (runtime default). Adds HEADLESS.md + PEER_GUIDE.md docs.
Verified: `ask-grok.sh text` now returns cleanly on GURU-5070.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Mike Swanson
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