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NoetherlyandGarry Tan
f320e4c7fd
OpenRouter (and potentially other proxy providers) expose OpenAI's
text-embedding-3 models with a provider prefix in the model ID, e.g.
`openai/text-embedding-3-large` rather than bare `text-embedding-3-large`.
`dimsProviderOptions()` checks `modelId.startsWith('text-embedding-3')`
which fails for the prefixed form, so the `dimensions` parameter is never
sent. The upstream provider returns its native dimensionality (3072 for
-large) instead of the configured value (e.g. 1536), causing an immediate
"dim mismatch" error on first embed.
The default OpenRouter embedding (`text-embedding-3-small` at 1536d)
masked this because its native size happens to match the default config.
The bug surfaces when using `-large`, or `-small` with a non-1536 dim
(512, 768, 1024 — all listed in the recipe's `dims_options`).
Fix: strip the provider prefix before the `startsWith` check. The full
prefixed ID is preserved in the error message for user clarity.