Cursor Image Generation

OmniRoute exposes Cursor plan image generation on POST /v1/images/generations through the same provider id as chat: cursor (alias cu).

Why the Agent CLI

Cursor chat in OmniRoute uses agent.v1.AgentService/Run (protobuf). That path rejects built-in client tools (shell, write, …). Image generation is a Cursor-native tool executed by the agent CLI against the seat. The image handler therefore spawns agent with a locked prompt and a per-request temp workspace (same shape as community seat bridges), then returns OpenAI-compatible b64_json.

Access restriction (Hard Rules #15 + #17)

This is the only IMAGE_PROVIDERS format that spawns a child process (the agent binary). Because POST /v1/images/generations is shared by ~40 other, non-spawning image providers that remote callers legitimately use, the whole route is not classified LOCAL_ONLY — instead handleCursorAgentImageGeneration enforces its own gate using the trusted AUTHZ_HEADER_PEER_LOCALITY verdict the authz pipeline stamps on every request (from the real TCP peer, never the spoofable Host header): only loopback and lan callers may reach the spawn; everything else (including a leaked API key replayed over a public tunnel) gets 403 before any credential lookup or process spawn happens. See src/server/authz/policies/management.ts for the same policy applied to the rest of the LOCAL_ONLY tier.

Concurrency gate is module-level (single-instance limitation)

CURSOR_IMG_MAX_CONCURRENT is enforced by an in-memory counter/queue scoped to the Node module instance (open-sse/handlers/imageGeneration/providers/cursorAgentImage.ts). It correctly limits concurrent agent spawns within one OmniRoute process, but does not coordinate across multiple processes/instances sharing the same Cursor seat (e.g. a multi-replica deployment) — each instance enforces its own independent limit. For a single-instance deployment (the default) this is exact; horizontally scaled deployments should keep CURSOR_IMG_MAX_CONCURRENT conservative per instance or route Cursor image traffic to a single instance.

Requirements

1. A connected Cursor account in the dashboard (OAuth or crsr_… API key).
2. The Cursor Agent binary available to the OmniRoute process:
   • env CURSOR_AGENT_BIN=/path/to/agent, or
   • ~/.local/bin/agent, or
   • providerSpecificData.agentBin on the Cursor connection.

Optional tuning:

Example

curl -sS https://<host>/v1/images/generations \
  -H "Authorization: Bearer <omni-api-key>" \
  -H "Content-Type: application/json" \
  -d '{"model":"cursor/auto","prompt":"a lantern in fog","size":"1024x1024"}'

Generation typically takes 1–2 minutes. Prefer an internal network path; edge proxies with ~100s timeouts will fail.

LiteLLM

Register an image model with mode: image_generation, api_base: http://omniroute:20128/v1, and model: openai/cursor/auto (or bare cursor/auto depending on your LiteLLM version).