lock oberon flake input (ref=main)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

flake.lock

@@ -87,6 +87,43 @@
         "type": "github"
       }
     },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1782959384,
+        "narHash": "sha256-xnJJk+ct+D2+wdRxj1wk36w5zV9RVESwRqcklPdt3fM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "65179426c83bb3f6bc14898b42ea1c6f01d374b0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "oberon": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "dir": "server/oberon",
+        "lastModified": 1783177860,
+        "narHash": "sha256-p8S1qCtsffP41ARCDgDeGBeY6O1e0+o7EkSJUt7B5c4=",
+        "ref": "main",
+        "rev": "cc15b067f45732e100ea7d6a89aef80b59e1e573",
+        "revCount": 94,
+        "type": "git",
+        "url": "ssh://git@codeberg.org/randogoth/xfay.git"
+      },
+      "original": {
+        "dir": "server/oberon",
+        "ref": "main",
+        "type": "git",
+        "url": "ssh://git@codeberg.org/randogoth/xfay.git"
+      }
+    },
     "praxis": {
       "flake": false,
       "locked": {
@@ -160,6 +197,7 @@
         "jirorian": "jirorian",
         "nfc_web": "nfc_web",
         "nixpkgs": "nixpkgs",
+        "oberon": "oberon",
         "praxis": "praxis",
         "scopesessions": "scopesessions",
         "sops-nix": "sops-nix",

flake.nix

@@ -33,10 +33,12 @@
     jirorian.url = "git+ssh://git@codeberg.org/randogoth/jirorian.git";
     jirorian.inputs.nixpkgs.follows = "nixpkgs";
 
-    # oberon lives in the private xfay monorepo (server/oberon). It pins its own
+    # oberon lives in the private xfay monorepo on the `main` branch
+    # (server/oberon) — pinned with ref=main because the repo's default branch is
+    # fax-machine-experiment, which does not contain the server. It pins its own
     # nixpkgs (nixos-unstable, for Dart 3.11) and must NOT follow ours — 25.11's
     # Dart 3.9 is too old for its resolved lockfile.
-    oberon.url = "git+ssh://git@codeberg.org/randogoth/xfay.git?dir=server/oberon";
+    oberon.url = "git+ssh://git@codeberg.org/randogoth/xfay.git?ref=main&dir=server/oberon";
   };
 
   outputs = { self, nixpkgs, sops-nix, ... }@inputs: