Embeddings shared LOCAL_BASE_URL with the local chat backend (the 3090's Ollama),
so the 3090 being powered off killed all chat (every turn embeds to recall + to
store). Add a separate EMBED_BASE_URL (defaults to LOCAL_BASE_URL, so existing
setups are unchanged) and use it in llm.embed.
Deployed: a user-level Ollama (CPU) now runs nomic-embed-text on lyra-cortex
itself; EMBED_BASE_URL points at 127.0.0.1:11434 while LOCAL_BASE_URL still points
the local chat backend at the 3090. Local embeddings verified identical to the
3090's (cosine 0.999994, 768-dim) so existing vectors stay valid — no re-embed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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