v0.7.1

Released 2026-05-19 · GitHub Release

Overview

• New interactive /playground page with a request editor and response viewer with plots
• V-SEIHR now ships a default initial condition
• Bug fixes in V-SEIHR response metadata
  • Peak summaries no longer leak vax_* keys into unvaccinated compartments age groups
  • Vaccination flows are now echoed back in the response metadata
• Documentation improvements: initial conditions page, parameterization options, UI refinements
• Expanded test coverage: SIR dynamics (R0 monotonicity, subcritical dieout, ODE match, seasonality suppression), value-level assertions on parameter transforms, and a new unit-test suite for initial conditions

Simulations

POST /api/v1/simulations

V-SEIHR default initial conditions

If you omit initial_conditions on a V-SEIHR request, the API now seeds ~0.05% of each age group as Infected and puts the rest in Susceptible. The _vax branch starts at zero. See the new Initial Conditions page.

Resolved vaccination flows in metadata

POST /simulations with a V-SEIHR request and a vaccination block but no explicit vaccination.flows now echoes the resolved default flow back in the response:

"metadata": {
  "vaccination": {
    "flows": [{ "source": "Susceptible", "target": "Susceptible_vax" }],
    "campaigns": [ /* ... */ ]
  }
}

Previously flows stayed null in the response even though the simulator had defaulted it internally.

Summary peaks no longer leak _vax keys

For V-SEIHR responses, results.summary.peaks.Susceptible used to contain age-group-shaped entries like vax_0-4, vax_total, etc. This bug has been fixed so that only age groups corresponding to the unvaccinated branch are included in the summary peaks.

Playground

A new page for trying simulations interactively is now available at /playground:

• Request JSON editor: Write the request body directly in JSON or pick from one of the provided templates
• Response viewer: After you run the simulation, you can see selected compartments/transitions/parameters plotted over time, with the full JSON response available in a separate tab.

Documentation

• Added information about initial conditions
  • New Initial Conditions page covering the percentage (default) and absolute methods, when to pick each, and what the fallback behavior is for omitted blocks
  • Custom Models example now includes an explicit initial_conditions block and notes the lack of a built-in default for custom presets
• All model preset pages document R0 and period-form parameters as alternatives to the rate forms (SIR, SEIR, SIS).
• Documentation refinement: the sidebar can be collapsed with a toggle button; frontend dependency updates