Modularity

Featly is a broad platform, but not every deployment needs every part. Feature areas are opt-out toggles (ADR-0024): disable the ones you don’t use and their HTTP endpoints disappear and they vanish from the dashboard nav. Defaults stay everything on, so this is never a breaking change — you opt out.

What you can toggle

Under Featly:Server:Features (all default true):

Toggle	Turns off
`Flags`	feature flags
`Configs`	dynamic configuration
`Segments`	reusable audiences
`Experiments`	A/B testing + exposure events
`Approvals`	approval workflows / pending changes
`Webhooks`	outbound webhook delivery
`Audit`	the audit log
`Rbac`	role-management UI/API (permission checks always run)

A small set of endpoints is always on — authentication, bootstrap, meta, environments, projects, API keys, settings, export, and the SDK API — because the rest of the system depends on them.

How to configure it

Set the toggles in appsettings.json:

{
  "Featly": {
    "Server": {
      "Features": {
        "Experiments": false,
        "Webhooks": false,
        "Segments": false
      }
    }
  }
}

Or in code when you register the server:

builder.Services.AddFeatlyServer(options =>
{
    options.Features.Experiments = false;
    options.Features.Webhooks = false;
});

A flags-only deployment

{
  "Featly": {
    "Server": {
      "Features": {
        "Configs": false,
        "Segments": false,
        "Experiments": false,
        "Approvals": false,
        "Webhooks": false
      }
    }
  }
}

This leaves the always-on core plus flags. The dashboard shows only the Flags area, and the disabled endpoints return 404 — there is no dead surface.

How it works

The dashboard discovers what’s enabled at runtime from an anonymous GET /api/meta endpoint that returns the active feature flags. The nav and the command palette filter themselves to the enabled areas; the server gates the corresponding endpoint groups at mount time. Toggling an area is a restart, not a migration — the data model is unchanged, so you can turn an area back on later without losing anything.