Wires the deployment's Claude Max login (OAuth token from
$CLAUDE_CREDENTIALS_PATH) into ClaudeBrain/ClaudeVision. OAuth tokens
authenticate as Bearer (auth_token=), not x-api-key, and only answer
when the first system block is the Claude Code identity string, so the
real persona moves to a second system block. Token is re-read per
request so a host-side refresh is picked up without a restart. Falls
back to ANTHROPIC_API_KEY when set.
Verified: WSAI_BRAIN=claude returns a real Korean reply through the
factory; 7 smoke tests still pass.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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