What problem does it solve? Onboarding a new image-generation provider requires verifying the full request path—authentication, routing, adapter behavior, image bytes, billing, and observability—before launch. This Skill guides you through running local end-to-end tests against the image API so routing, billing, and image output issues are caught before production. ## Core Features & Use Cases - Full-path local testing: Start cfw-image-api and dev-fs-logs, then exercise text-to-image, edits, streaming, capability, and error scenarios against a seeded model and endpoint. - Response and image validation: Parse responses with ImageGenerationResponseSchema, verify base64 image bytes, magic bytes, MIME types, dimensions, and streaming event ordering. - Cost reconciliation: Compare emitted SKU items and usage against pricing_versions.pricing_json and provider-reported costs, including edge cases like moderation refusals and rejected capabilities. - Use Case: After writing a new provider adapter, use this Skill to run the local test matrix, inspect dev-fs-logs for routing and billing evidence, and confirm the model appears correctly in the web app's image lane. ## Quick Start Ask the AI to run the image generation end-to-end tests for your new provider adapter and verify the billing evidence in dev-fs-logs.