Author sewing patterns and print them at home at exact 1:1 scale (tiled across
US-Letter sheets) or save them for later. A phone-friendly web app for the
household, served from the home hub at command.home.arpa/sewing/.
Built for home sewists who sew from purchased PDF patterns and want to make their own. First focus: bags (a parametric boxy tote), growing toward garments.
- Boxy tote template — enter the finished width × height × depth (+ seam allowance and strap size) and get a full tiled pattern: front/back, sides, base, and straps, each with a cut line, a seam-allowance stitch line, a grainline, and a label. Plus a simple rectangle tool.
- Print at home, true to size — PDFs are generated in the browser (pdf-lib) and
relayed straight to a networked printer over direct IPP (
print-scaling=none= exact 1:1) — no CUPS, no drivers, no root. Or download the PDF. - Calibration-first — a one-time test page confirms a new printer prints true before any pattern is allowed to print.
- Save patterns — stored server-side in SQLite (backed up nightly), so they sync across your devices.
FastAPI + Jinja2 + SQLite, one rootless-podman container (systemd-user quadlet),
reverse-proxied by Caddy. PDFs are generated in the browser (vendored pdf-lib,
no build step); the server stores the pattern documents and relays bytes to the
printer over IPP (app/printing.py, pure stdlib). See CLAUDE.md (full app
guide), DESIGN.md (architecture + decisions), PRINTING.md (the verified
direct-IPP print design), and deploy/README.md (install/operate).
app/ FastAPI app: main.py, printing.py (IPP), db.py, models.py,
templates/, static/ (css, js/pattern-pdf.js = browser generators,
js/vendor/pdf-lib.min.js)
tools/ the physically-PROVEN reference generators + IPP CLI (de-risk
artifacts): calibration/ (1:1 proof), tiling/ (tiled PDF + SPEC.md)
deploy/ Containerfile is at root; quadlet + nightly backup live here
Containerfile production image
python -m venv .venv && .venv/bin/pip install -r requirements.txt
.venv/bin/uvicorn app.main:app --reload --port 8006 # serves at /(In the container, BASE_PATH=/sewing makes the same image serve under the proxy.)
The 1:1 print spine is physically proven (single-page and tiled). The freeform
multi-piece editor, interactive garment authoring (curves/darts/notches +
measurements on /edit), the 3D assembled preview, and a gravity garment-drape on
a parametric dress form are all done (see CLAUDE.md for the full milestone log).
Next: set-in sleeves in 3D — drafting a sleeve and printing it 1:1 already work;
the way the sleeve cap drapes on the form is being refined.
MIT licensed. A personal home-server project.