SolverForge

Write constraints like you write code

Build planning software in Rust. Model the domain with ordinary types, express the rules in code, and ship optimization systems without switching to a separate solver language.

Start with solverforge-cli See the employee scheduling tutorial
Neutral app shell from the CLI Incremental domain generation after scaffolding Step-by-step employee scheduling tutorial

What the API feels like

Readable constraints, explicit business rules

SolverForge keeps the model close to the domain. You work with shifts, employees, routes, and scores instead of translating everything into a separate optimization language.

  • Constraint Streams for composable rules and score analysis
  • Typed Rust models that stay recognizable as application code
  • Solver components you can embed in real applications
constraints.rs
// Prevent assigning overlapping shifts to the same employee.
let no_overlap = factory
    .shifts()
    .join(equal(|shift: &Shift| shift.employee))
    .filter(|a: &Shift, b: &Shift| {
        a.employee.is_some() && a.start < b.end && b.start < a.end
    })
    .penalize_hard()
    .named("No overlap");

// Require every assigned employee to satisfy the shift's required skill.
let required_skill = factory
    .shifts()
    .join(equal(|shift: &Shift| shift.employee))
    .filter(|shift: &Shift, other: &Shift| {
        shift.employee == other.employee
            && shift.required_skill.is_some()
            && !shift.employee
                .as_ref()
                .is_some_and(|employee| employee.skills.contains(&shift.required_skill.unwrap()))
    })
    .penalize_hard()
    .named("Employee skill match");

Examples and companion libraries

Start with a working planner. Extend into product and routing.

Begin with employee scheduling, then add scheduling interfaces through solverforge-ui or travel-time and route modeling through solverforge-maps.

Build your first scheduler

Follow a complete employee scheduling walkthrough with shifts, hard rules, soft preferences, and a live application loop.

Start the tutorial

Add scheduling UI

Use solverforge-ui for scheduling views, frontend primitives, and integration helpers in operational products.

Explore UI docs

Model routes and travel time

Use solverforge-maps for road-network loading, travel-time matrices, and route geometry in dispatch systems.

Read maps docs

In practice

I have incorporated SolverForge in my new Rust application for staff scheduling and it's working like a charm, A+

Fawaz Halwani, Pathologist, The Ottawa Hospital

Public docs and code

Everything important is visible

The docs, APIs, tutorials, and source are public, so you can inspect SolverForge directly before deciding whether it fits your system.

  • CLI-first setup with generated project scaffolds
  • Reference tutorials for scheduling and routing problems
  • Open-source crates and docs you can verify directly

Project overview GitHub organization About SolverForge