feat(flake): add clan-core 26.05 as a flake input (Phase 1, no behavior change)

Introduces clan-core pinned to its 26.05 release alongside the existing nixpkgs
26.05 input. No host configuration is changed — this is a pure dependency
addition so Phase 2 (per-host vars/secret management migration) has the input
available without a separate flake.lock bump.

clan-core.inputs.nixpkgs.follows = "nixpkgs" keeps a single nixpkgs closure.
sops-nix remains as a flake input; vars layers on top of it rather than
replacing it (clan's sops storage backend still needs sops-nix).

All hosts evaluate cleanly (codex-maintenance.sh --full-check equivalent
triggered by the flake.nix change).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

flake.lock

@@ -1,6 +1,80 @@
 {
   "nodes": {
+    "clan-core": {
+      "inputs": {
+        "data-mesher": "data-mesher",
+        "disko": "disko",
+        "flake-parts": "flake-parts",
+        "nix-darwin": "nix-darwin",
+        "nix-select": "nix-select",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "sops-nix": "sops-nix",
+        "systems": "systems",
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1783497933,
+        "narHash": "sha256-TxmwEews6URFPqOWEHNychtXbFDgLZjbOfEXtvtOm6U=",
+        "rev": "3dc0221ca09033599fe98055e9bbc81bdf32732a",
+        "type": "tarball",
+        "url": "https://git.clan.lol/api/v1/repos/clan/clan-core/archive/3dc0221ca09033599fe98055e9bbc81bdf32732a.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://git.clan.lol/clan/clan-core/archive/26.05.tar.gz"
+      }
+    },
+    "data-mesher": {
+      "inputs": {
+        "flake-parts": [
+          "clan-core",
+          "flake-parts"
+        ],
+        "nixpkgs": [
+          "clan-core",
+          "nixpkgs"
+        ],
+        "treefmt-nix": [
+          "clan-core",
+          "treefmt-nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1778718524,
+        "narHash": "sha256-pXLoI6Ax0EnUK6r34UM1vibVC7CfTu6j72R2692ZzPs=",
+        "rev": "12c552ad547d87254f33f33bddd1a2cdbeac754d",
+        "type": "tarball",
+        "url": "https://git.clan.lol/api/v1/repos/clan/data-mesher/archive/12c552ad547d87254f33f33bddd1a2cdbeac754d.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://git.clan.lol/clan/data-mesher/archive/main.tar.gz"
+      }
+    },
     "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "clan-core",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1780290312,
+        "narHash": "sha256-eTAlX0CwgB84Ts3GaBd944A3DRXVMzgA0EqroZBISUo=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "115e5211780054d8a890b41f0b7734cafad54dfe",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
+    "disko_2": {
       "inputs": {
         "nixpkgs": [
           "nixpkgs"
@@ -51,9 +125,30 @@
         "type": "github"
       }
     },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "clan-core",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1778716662,
+        "narHash": "sha256-m1Yf0wZ8j1OHjTc2UwHwyQRSnNeSgLJOd7q5Y45hzi4=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "f7c1a2d347e4c52d5fb8d10cb4d94b5884e546fb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "inputs": {
-        "systems": "systems"
+        "systems": "systems_2"
       },
       "locked": {
         "lastModified": 1694529238,
@@ -109,6 +204,40 @@
         "type": "github"
       }
     },
+    "nix-darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "clan-core",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1779036909,
+        "narHash": "sha256-zXcwYQGCT6pzinK+1dBB2ekTVtfxGZAapb3Evdcu4fY=",
+        "owner": "nix-darwin",
+        "repo": "nix-darwin",
+        "rev": "56c666e108467d87d13508936aade6d567f2a501",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-darwin",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
+    "nix-select": {
+      "locked": {
+        "lastModified": 1763303120,
+        "narHash": "sha256-yxcNOha7Cfv2nhVpz9ZXSNKk0R7wt4AiBklJ8D24rVg=",
+        "rev": "3d1e3860bef36857a01a2ddecba7cdb0a14c35a9",
+        "type": "tarball",
+        "url": "https://git.clan.lol/api/v1/repos/clan/nix-select/archive/3d1e3860bef36857a01a2ddecba7cdb0a14c35a9.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://git.clan.lol/clan/nix-select/archive/main.tar.gz"
+      }
+    },
     "nixos-conf-editor": {
       "inputs": {
         "flake-compat": "flake-compat",
@@ -163,11 +292,12 @@
     },
     "root": {
       "inputs": {
-        "disko": "disko",
+        "clan-core": "clan-core",
+        "disko": "disko_2",
         "home-manager": "home-manager",
         "nixos-conf-editor": "nixos-conf-editor",
         "nixpkgs": "nixpkgs_2",
-        "sops-nix": "sops-nix"
+        "sops-nix": "sops-nix_2"
       }
     },
     "snowfall-lib": {
@@ -194,6 +324,27 @@
       }
     },
     "sops-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "clan-core",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1780547341,
+        "narHash": "sha256-Gq8KNx5A7hBB3uGJaj6eQfLDIz5YdLu92gqBcvHvoUo=",
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "rev": "9ed65852b6257fbeae4355bc24ecfea307ca759a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "type": "github"
+      }
+    },
+    "sops-nix_2": {
       "inputs": {
         "nixpkgs": [
           "nixpkgs"
@@ -214,6 +365,22 @@
       }
     },
     "systems": {
+      "locked": {
+        "lastModified": 1774449309,
+        "narHash": "sha256-brhZ8DmuGtzkCYHJg4HEd602amKm89Y9ytsFZ5uWD1w=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "c29398b59d2048c4ab79345812849c9bd15e9150",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "ref": "future-26.11",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
       "locked": {
         "lastModified": 1681028828,
         "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
@@ -227,6 +394,27 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "clan-core",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1780220602,
+        "narHash": "sha256-eynAfOmbmxJnkp7YewvCEbShNnnYJ9gLLqkzsYtBPeM=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "db947814a175b7ca6ded66e21383d938df01c227",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -16,6 +16,10 @@
       url = "github:Mic92/sops-nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    clan-core = {
+      url = "https://git.clan.lol/clan/clan-core/archive/26.05.tar.gz";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = { self, nixpkgs, nixos-conf-editor, home-manager, sops-nix, ... } @ inputs: