Files
OmniRoute/tests/unit
danscMax 52b9ed4bc8 feat(api): route Google AI Studio Imagen through /v1/images/generations (#7656)
* feat(api): route Google AI Studio Imagen through /v1/images/generations

gemini/imagen-4.0-* models were advertised in /v1/models (surfaced live via
Google ListModels) but were unroutable on /v1/images/generations: `gemini` was
not in the image registry, so the route rejected them with "Invalid image
model". They also 404 on the chat route because Imagen uses the dedicated
:predict endpoint, not generateContent.

Wire a `gemini` image provider (format "google-imagen") that POSTs to
{baseUrl}/{model}:predict with x-goog-api-key, sends the instances/parameters
body, and normalizes predictions[].bytesBase64Encoded into the OpenAI image
shape. Only imagen-* models dispatch here (isImagenModel guard) — gemini
flash-image / nano-banana keep routing through /v1/chat/completions.

Note: Imagen requires a billing-enabled Google project; free-tier keys get
403 / quota 0. Request-builder and response-parser are pure and unit-tested;
the live Google call needs a paid key to exercise.

Tests: tests/unit/gemini-imagen-predict.test.ts (7 cases: registry wiring,
parseImageModel resolution, isImagenModel guard, predict body shape +
sampleCount clamp + aspectRatio, response normalization + empty tolerance).

* refactor(images): extract Google Imagen entries to registry module (file-size cap)

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

---------

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>
Co-authored-by: Diego Rodrigues de Sa e Souza <diegosouza.pw@gmail.com>
2026-07-18 11:35:14 -03:00
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