OneCAD/ROADMAP.md

SolveCraft roadmap

Status as of 2026-10-07. SolveCraft targets Fusion-style parametric modelling (sketch → features → parametric timeline) as an open, pure-Rust, agent-drivable application.

At a glance

Question	Answer
Where are we?	M0 done; M1/M2 in progress. Sketch with solver, extrude (taper, two-sided, through all), revolve, fillet/chamfer, holes, patterns, mirror, shell, draft, loft, sweep, split, construction planes, parameters that rebuild the timeline, STEP/STL export, desktop and browser (wasm) app with Fusion-style selection (hover/selected highlights, origin planes, click-to-pick sketch planes, multi-select, window/crossing box selection, animated view cube), CLI, MCP server, oracle harness.
Command parity (SOLID + SKETCH toolbar)	57 / 291 (20%) — docs/parity.md
Fusion oracle	29 / 29 parts match Fusion's measurements — docs/oracle.md
Tests	85 (solver, profiles, kernel booleans/blends/measures, expressions, timeline, file formats, camera, engine end-to-end, hostile-input fuzz over every command)
Gates	cargo xtask ci: fmt, clippy -D warnings, tests, asset attribution, layering, wasm32 build — green
Weighted parity estimate	≈ 5% of Fusion's Design workspace by importance (sketch + basic solids are the core, but surfaces, assemblies, sheet metal, CAM, drawings are untouched)
Time to a useful alpha (M0–M6)	≈ 150 agent hours remain

Milestones

#	Milestone	Status	Hours left
M0	Vertical slice	done	—
M1	Sketch depth, oracle sketch cases (arcs, taper, two-sided, sketch modify tools)	in progress	16
M2	Robust modelling: coplanar booleans in the kernel, holes (placed on faces and on sketch points), threads (cosmetic, then modelled), patterns, mirror, shell, draft, split, construction geometry	in progress	16
M3	General fillets and chamfers (curved edges, chains, vertex blends)	planned	30
M4	Files: STEP import (done: all 29 Fusion STEP files — docs/step-import.md), 3MF export and 3MF/STL import as mesh bodies (done), DXF sketches, OBJ import	in progress	6
M5	Persistent naming of faces and edges	planned	20
M6	UI depth: selection feedback and origin (done), timeline editing (done: edit feature, history marker drag, reorder with dependency checks, suppress, rename, delete with dependents, re-resolved references), live previews, measure tool, section view, drag-solve	in progress	16
M7	Sweep, loft, rib, web, emboss, thread, coil, pipe	planned	24
M8	Surface workspace	planned	30
M9	Components and assemblies (Fusion-style): New Component / Create Components from Bodies, active component, per-component origin/bodies/sketches/timeline entries, occurrences with transforms, Copy/Paste vs Paste New, nested Browser tree with visibility and isolate; Ground, Move/Copy of occurrences, joints (rigid, revolute, slider, cylindrical, pin-slot, planar, ball) by joint origins with limits and Drive Joints, As-built Joint, Rigid Group, contact sets later; interference, per-component physical properties; STEP with assembly structure. Groundwork done: the document is a component tree (features and bodies carry a component, active component, New Component, Create Components from Bodies)	planned	40
M10	Sheet metal	planned	30
M11	2D drawings	planned	30
M12	Release: installers, signing, docs, performance	planned	16

Known limitations

• Fillets and chamfers: straight edges (convex or concave) between planar faces with perpendicular planar end faces; whole smooth loops of a planar face (pocket floors, plate outlines); every edge of a convex planar body (sphere corners). Other corner configurations are not supported yet.
• Coincident planar faces are pushed apart exactly when their neighbours stand perpendicular (extruded and box-like parts); other coincident configurations can still fail. Fully internal voids are not supported. Spheres are built from six pole-free patches so they combine reliably.
• Mass properties come from fine tessellation (curved faces within ~1e-4 relative).
• STEP import reads solids (B-rep with analytic and B-spline geometry), units, product names, colours and assemblies; offset surfaces and pcurve-only edges are not read yet, and assembly components are flattened into bodies (the tree is kept for M9).
• No persistent naming (fillet edges are re-found by position).
• Shell and draft work on convex bodies with planar faces; loft is ruled (no tangency end conditions).
• Dialogs have no live preview of the result yet.

Kernel

truck (Apache-2.0) behind our own kernel crate, with our own blend operation and boolean retry/validation; see plan/adr/0001-geometry-kernel.md (local) — summary in README.