Official OpenRouter model-provider plugin for Assembly Line and the default
selected by assembly-line init.
model: openrouter/openai/gpt-5.4-mini
The package owns Pi provider registration, dynamic model discovery, API-key
authentication, OpenRouter request semantics (including video and reasoning),
semantic-memory embeddings, response accounting, and usage reconciliation.
Set OPENROUTER_API_KEY; optional endpoint and attribution variables are
declared in the plugin contract. Authored xhigh and max reasoning are passed
to OpenRouter without Pi silently reducing them to high.