LocalGen

Local image and SVG generation on your own GPU, reachable from any MCP harness — Claude Code, Claude Desktop, OpenCode, pi, deepseek. Fully offline after the model downloads.

Built and measured on an RTX 4060 Laptop (8 GB VRAM).

Image	10.4 s at 1024x1024, FLUX.2-klein-4B, FP8, 5001 MiB peak
SVG (author)	25–90 s, LLM-written paths, sanitized and render-validated
SVG (trace)	~8 s, FLUX raster then vectorized — best for artwork
Video	not built (see AGENTS.md)

How it works

One background worker owns the GPU. Harnesses talk to it through a thin MCP adapter that imports no torch and starts in under a second, so several harnesses can be connected at once and restarting one costs nothing.

harness --stdio--> app/mcp_server.py --HTTP--> app/main.py --> GPU
                   (thin, ~680ms)              (owns models)

Only one model fits in 8 GB, so a ModelManager runs every GPU task on a single thread and evicts whatever is resident before loading something else. It also reclaims VRAM from LM Studio, which otherwise holds ~5.7 GB.

Setup

python -m venv .venv
.\.venv\Scripts\Activate.ps1
pip install -r requirements.txt

Then either LM Studio (default — load qwen3.5-4b, start the local server) or Ollama (LOCALIMAGEGEN_LLM_PROVIDER=ollama, which runs it CPU-only).

Use

python main.py serve                      # start the worker
python main.py image "a lighthouse at dusk" --platform youtube
python main.py svg "rocket icon"
python main.py svg "fox mascot sticker" --trace
python main.py status

HTTP: POST /generate, /v1/image, /v1/image/edit, /v1/svg, /v1/svg/edit, /v1/enhance. Swagger at http://127.0.0.1:8765/docs.

From a harness: generate_image, edit_image, generate_svg, edit_svg, enhance_prompt, list_presets, service_status, evict_models. See docs/mcp-registration.md.

Notes worth knowing

• guidance_scale and negative_prompt are ignored. FLUX.2-klein is distilled, so classifier-free guidance is disabled. Both are accepted for compatibility and return a warning rather than pretending to work.
• FP8 quantization is what makes this usable — 11x faster than bf16 on this card, because in bf16 the model does not fit and the driver spills to system RAM on every step. See bench.md.
• Image editing is free — FLUX.2 takes reference images natively, so edit_image needs no extra model.
• Generated files land in ~/LocalImageGen/ by default.

Layout

app/mcp_server.py   MCP adapter (no torch)
app/launcher.py     worker discovery + auto-spawn
app/worker.py       GPU-owning process
app/main.py         FastAPI routes
app/manager.py      VRAM arbiter
app/service.py      modality orchestration
app/backends/       image_flux, svg, enhance, llm
app/svgtool.py      SVG sanitize + render-validate
main.py             CLI
scripts/bench.py    performance measurement
tests/              51 tests, no GPU required