Prompt — Add a New Model Provider to Image Gin

This is a prompt template for an AI coding agent. Paste it (or a customized version) into your agent session when you want to add a new image-generation provider to Image Gin.

Context to give the agent

You're adding a new image-generation provider to Image Gin, an Obsidian plugin in lossless-group/image-gin. The canonical pattern is documented in context-v/blueprints/Add-New-Image-API-to-Providers.md — read that blueprint first; it's the source of truth for the shape.

The repo has reference implementations for three providers already:

• Recraft — src/services/recraftImageService.ts, src/modals/RecraftModal.ts — generation

• Ideogram — src/services/ideogramService.ts, src/modals/IdeogramModal.ts — generation (added 2026-05-03 as the worked-example for the blueprint)

• Magnific (formerly Freepik) — src/services/freepikService.ts, src/modals/FreepikModal.ts — search/stock, distinct shape from generation

Use the generation pattern (Recraft + Ideogram), not the search pattern, for any text-to-image provider.

Concrete instruction

Add <Provider Name> as a new image-generation provider to image-gin, following the blueprint at context-v/blueprints/Add-New-Image-API-to-Providers.md.

Provider details:

• API endpoint: <URL>

• Auth method: <bearer token | API key in header | other>

• API key env var: <PROVIDER>_API_KEY (already added to .env)

• Request shape: <link to provider's API docs>

• Response shape: <link to provider's API docs>

• Streaming or single-response: <streaming | single>

Don't deprecate Recraft, Ideogram, or Magnific. The new provider is purely additive — separate command, separate modal, separate settings section.

Required scope (from the blueprint)

1. Settings — extend DEFAULT_SETTINGS in src/settings/settings.ts with a new sub-object for the provider (enabled, apiKey, model selection if multiple, any provider-specific tunables). The runtime data.json must merge cleanly over DEFAULT_SETTINGS — no field can exist at runtime without existing in defaults.

2. Settings UI — extend the Settings tab to render the new provider's section. Match the visual rhythm of Recraft/Ideogram sections.

3. Service — src/services/<provider>Service.ts. Use Obsidian's requestUrl, NOT browser fetch. Build multipart bodies by hand if the API needs uploads — see imagekitService.ts for the boundary pattern.

4. Modal — src/modals/<Provider>Modal.ts extending the unified wide-modal pattern. Cmd/Ctrl+Enter submits. Stream responses if the API supports streaming.

5. Command registration — in main.ts, add a new command that opens the modal. ID should be generate-<provider>-image.

6. Type safety — strict, no any. Use unknown and narrow at the API boundary. Type predicates (v is X) are the canonical narrowing tool.

7. Build cleanly — pnpm build must pass with no TypeScript errors and no esbuild warnings.

Required reading

• context-v/blueprints/Add-New-Image-API-to-Providers.md — canonical blueprint, treat as load-bearing

• context-v/reminders/This-is-an-Obsidian-plugin-Read-Obsidian-API-Docs.md — banned patterns (any, innerHTML, var, etc.) and review-bot rejection reasons

• src/services/recraftImageService.ts — reference implementation; copy its shape, not its provider-specific details

• src/modals/IdeogramModal.ts — reference modal implementation

What the agent should not do

• Don't introduce new dependencies. Use Node built-ins and Obsidian's requestUrl. Specifically: no axios, no node-fetch, no js-yaml.

• Don't refactor adjacent providers. Recraft and Ideogram are out of scope unless the new provider's pattern reveals a shared abstraction worth extracting — and even then, raise it as a separate question, don't act on it.

• Don't change the wide-modal layout. New providers slot into the existing pattern.

• Don't bump the plugin's version in manifest.json by hand — pnpm version handles that.

Validation before declaring done

1. pnpm build exits 0.

2. pnpm dev running, plugin loaded in a test vault, the new command appears in the command palette.

3. Modal opens, settings render, an actual API call returns and writes a file.

4. The other three providers (Recraft, Ideogram, Magnific) still work — quick smoke test on each.

Provider-specific notes (when the new provider is...)

Google Gemini Imagen

Endpoint shape: POST https://generativelanguage.googleapis.com/v1beta/models/imagen-3.0-generate-001:generateContent (or current equivalent — see https://ai.google.dev/gemini-api/docs/imagen). Auth via key=<API_KEY> query parameter or x-goog-api-key header. Returns base64-encoded PNG bytes inline in the response — service module needs to decode and write to vault.

Stability AI / SDXL

Endpoint shape: POST https://api.stability.ai/v2beta/stable-image/generate/<engine>. Auth via Authorization: Bearer <key>. Multipart form for inputs; response is binary image bytes directly.

Flux

Endpoint shape varies by hosted provider (Replicate, BFL direct, etc.). Pick one host and document which.