From f2090436ef77377f46dba27147c0f5d6c6a8b418 Mon Sep 17 00:00:00 2001
From: Victor Borja <vborja@apache.org>
Date: Wed, 1 Apr 2026 04:39:46 -0600
Subject: [PATCH] feat(batteries): mutual-provider allows user-to-users
 provides

---
 modules/aspects/provides/mutual-provider.nix  | 14 ++++++
 .../features/user-host-mutual-config.nix      | 48 +++++++++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/modules/aspects/provides/mutual-provider.nix b/modules/aspects/provides/mutual-provider.nix
index 196b54e..4d64469 100644
--- a/modules/aspects/provides/mutual-provider.nix
+++ b/modules/aspects/provides/mutual-provider.nix
@@ -37,6 +37,19 @@ let
   find-mutual = from: to: den.aspects.${from.aspect}._.${to.aspect} or { };
   user-to-hosts = user: den.aspects.${user.aspect}._.to-hosts or { };
   host-to-users = host: den.aspects.${host.aspect}._.to-users or { };
+  user-to-users = user: den.aspects.${user.aspect}._.to-users or { };
+
+  mutual-user-user = host: user: {
+    includes = map (
+      from:
+      parametric.fixedTo { inherit host user; } {
+        includes = [
+          (find-mutual from user)
+          (user-to-users from)
+        ];
+      }
+    ) (builtins.filter (u: u != user) (builtins.attrValues host.users));
+  };
 
   mutual-host-user =
     { host, user }:
@@ -47,6 +60,7 @@ let
         (find-mutual user host)
         (host-to-users host)
         (user-to-hosts user)
+        (mutual-user-user host user)
       ];
     };
 
diff --git a/templates/ci/modules/features/user-host-mutual-config.nix b/templates/ci/modules/features/user-host-mutual-config.nix
index 3593617..20b3ca4 100644
--- a/templates/ci/modules/features/user-host-mutual-config.nix
+++ b/templates/ci/modules/features/user-host-mutual-config.nix
@@ -244,5 +244,53 @@
       }
     );
 
+    test-user-provides-to-all-users = denTest (
+      {
+        den,
+        lib,
+        igloo,
+        ...
+      }:
+      {
+        den.ctx.user.includes = [ den._.mutual-provider ];
+
+        den.hosts.x86_64-linux.igloo.users = {
+          tux = { };
+          alice = { };
+          bob = { };
+          carl = { };
+        };
+
+        den.aspects.tux.provides.to-users =
+          { user, ... }:
+          {
+            homeManager.programs.vim.enable = true;
+          };
+
+        den.aspects.tux.provides.alice = {
+          homeManager.programs.tmux.enable = true;
+        };
+
+        expr = with igloo.home-manager.users; {
+          tux = tux.programs.vim.enable;
+          alice = alice.programs.vim.enable;
+          bob = bob.programs.vim.enable;
+          carl = carl.programs.vim.enable;
+          aliceTmux = alice.programs.tmux.enable;
+          bobTmux = bob.programs.tmux.enable;
+        };
+
+        expected = {
+          tux = false;
+          alice = true;
+          bob = true;
+          carl = true;
+          aliceTmux = true;
+          bobTmux = false;
+        };
+
+      }
+    );
+
   };
 }