LibreChat sandbox: accessible image generation via MCP tool; two MCP servers; new overlay tag

maintenance/librechat-sandbox.md

@@ -24,13 +24,26 @@ env vars, known state). This doc is the operator-facing summary.
   (dedicated LiteLLM virtual key, alias `librechat-speech`, $5/30d, audio
   models only — never the gateway master key), `IMAGE_GEN_OAI_BASEURL` +
   `IMAGE_GEN_OAI_MODEL` (agent image tool → gateway), `SEARXNG_INSTANCE_URL`.
-- **Docs MCP server** — `/app/data/mcp/server.py` (volume, mirrored in the
-  repo at `mcp/server.py`; stdlib-only Python; tool `search_docs`).
+- **MCP servers** — `/app/data/mcp/server.py` (docs search, `search_docs`,
+  starts at boot) and `/app/data/mcp/image_server.py` (image generation,
+  `generate_image`, per-user startup — see below); both mirrored in the repo
+  under `mcp/`, stdlib-only Python.
 - **Brand assets** (login logo, favicons, PWA icons, page title) — baked into
   a pinned overlay image `FROM` the official appstore image, built from the
   repo via `cloudron builder build` and deployed with
   `cloudron update --image ... --force`. Deployed tag:
-  `registry.inference.coop/co-op/librechat-custom:20261019-070dec3`.
+  `registry.inference.coop/co-op/librechat-custom:20261019-5e214e4`.
+
+## Image generation (two member-facing paths)
+
+1. **MCP tool (easiest)**: the `inference-image` MCP server exposes
+   `generate_image` in the composer's **+** palette — no agent setup. Each
+   member's own co-op API key is injected per-user (LibreChat
+   `customUserVars` → `env`, `startup: false` because the key only exists
+   after the member saves it in the MCP panel), so images bill to the
+   member's own balance (~1–2¢ per 1024² image via `regolo/qwen-image`).
+2. **Agent tool**: LibreChat's built-in "OpenAI Image Tools"
+   (`IMAGE_GEN_OAI_BASEURL`/`IMAGE_GEN_OAI_MODEL` → gateway; per-user keys).
 
 ## Update policy
 
@@ -75,8 +88,9 @@ cloudron logs --app 4023ccbf-d57a-4500-97df-14de9cf3516e --lines 60 | \
 curl -s https://librechat-test.inference.coop/api/config   # appTitle, emailLoginEnabled
 ```
 
-Expected: `Custom config file loaded`, `[MCP] Initialized with 1 configured
-server and 1 tool`, `[schedules] engine started`, `appTitle: Inference
-Co-op`, `emailLoginEnabled: false`. The login page shows the co-op logo, the
-co-op favicon, and a single "Login with Inference Cooperative" (Cloudron SSO)
-path with no email/password form.
+Expected: `Custom config file loaded`, `[MCP][inference-docs]` initialized
+with tool `search_docs`, `inference-image` registered (its `Tools: undefined`
+boot line is expected — per-user startup), `[schedules] engine started`,
+`appTitle: Inference Co-op`, `emailLoginEnabled: false`. The login page shows
+the co-op logo, the co-op favicon, and a single "Login with Inference
+Cooperative" (Cloudron SSO) path with no email/password form.