Mainspring

A static, offline-first web app for TaskJuggler plans. The real TaskJuggler 3.8.4 scheduler runs in the browser on ruby.wasm, and the plan stays a plain .tjp text file under version control.

Status: Phase 2 (Gantt and visual editing) in progress. See docs/BUILD_PLAN.md and docs/phases/.

Run locally / Preview

Needs Node.js 22 (see .nvmrc).

npm ci
npm run build:engine   # packs ruby.wasm and TaskJuggler into public/engine/
npm run dev

Then open http://localhost:4321/app.

A public preview of main runs on GitHub Pages: https://jackhale98.github.io/mainspring/ (ADR-0006). It is built with MAINSPRING_BASE=/mainspring/; npm run test:base-path checks that build locally.

License

Mainspring is licensed under the GNU General Public License, version 2 or (at your option) any later version (GPL-2.0-or-later); see LICENSE. It bundles TaskJuggler (engine/tj/), which is licensed under GPL version 2 only; see engine/tj/COPYING. The other third-party code in the built site is listed in THIRD_PARTY_NOTICES.md.