* feat(xai): add grok-4.5 (early access) to catalog, context lengths, and reasoning-effort allowlist
- hermes_cli/models.py: grok-4.5 in _XAI_CURATED_EXTRAS (callable but absent
from models.dev) and _XAI_STATIC_FALLBACK, so the /model picker and
validation surface it on both xai and xai-oauth.
- agent/model_metadata.py: context lengths grok-4.5 -> 500K (per model card)
and grok-build-latest -> 500K (alias); grok-4.5 added to
_GROK_EFFORT_CAPABLE_PREFIXES.
Verified live against api.x.ai /v1/responses (2026-07-08): effort
low/medium/high accepted (server default: high), "none" rejected,
function calling works, full agent turn with terminal tool succeeded.
* feat(xai): grok-4.5 GA — add aggregator catalog entries, refresh comments
grok-4.5 is now GA: models.dev lists it (500K context, effort
low/medium/high) and both OpenRouter and Nous serve x-ai/grok-4.5.
Add it to the OpenRouter fallback snapshot and the Nous static list,
and update the early-access comments.
* chore: regenerate model-catalog.json for x-ai/grok-4.5