Add a search provider

Make a slice findable in the ⌘K palette by implementing one interface. The backend fans queries out to every provider in parallel and merges the ranked lanes.

Implement ISearchProvider

public sealed class ProjectSearchProvider : ISearchProvider
{
    public string Key => "projects";                 // stable; also names the admin toggle

    public async Task<IEnumerable<SearchHit>> SearchAsync(SearchContext ctx, string term, CancellationToken ct)
    {
        if (!ctx.Can(ProjectPermissions.Read)) return [];   // scope to the current user

        var t = term.ToLower();
        return await ctx.Db.Set<Project>().AsNoTracking()
            .Where(p => p.Name.ToLower().Contains(t))        // case-insensitive
            .Take(5)
            .Select(p => new SearchHit("projects", p.Name, $"/projects/{p.Id}", icon: "folder"))
            .ToListAsync(ct);
    }
}

Register it

Register via the slice's IServiceRegistrar so it's discovered automatically.

Add the admin toggle

Co-locate an ISettingsContributor registering SearchProviderSettings.EnabledKey(Key) — a Search.{Key} App-scoped bool (default true). Admins can then switch the lane on/off from /admin/settings, and SearchService skips a provider whose toggle is off.

That's it — the palette aggregates your lane, permission-scoped and ranked, with no central registry to edit. See Command palette & search.