feat(opencode): install kepano/obsidian-skills into ~/.agents/skills

Add obsidian-skills as a flake input (flake = false) and map each
skill subdirectory into ~/.agents/skills/<skill>, alongside the
existing local skills. Updates flow through `nix flake update
obsidian-skills`.

flake.lock

@@ -672,6 +672,22 @@
         "type": "github"
       }
     },
+    "obsidian-skills": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1778185448,
+        "narHash": "sha256-2kr8fmkuxRLaTy2O+dTv9K+75mRIqkLmaArw2/hj5uc=",
+        "owner": "kepano",
+        "repo": "obsidian-skills",
+        "rev": "ac9398734fe719565809f7a6048b05c36b1ca38f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kepano",
+        "repo": "obsidian-skills",
+        "type": "github"
+      }
+    },
     "pre-commit-hooks-nix": {
       "inputs": {
         "flake-compat": [
@@ -714,6 +730,7 @@
         "nix-homebrew": "nix-homebrew",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs_2",
+        "obsidian-skills": "obsidian-skills",
         "rust-overlay": "rust-overlay_2",
         "simple-nixos-mailserver": "simple-nixos-mailserver",
         "snowfall-lib": "snowfall-lib",

flake.nix

@@ -75,6 +75,11 @@
 
     wyoming-whisper-rs.url = "git+https://git.hoyer.xyz/harald/wyoming-whisper-rs.git?submodules=1";
     wyoming-whisper-rs.inputs.nixpkgs.follows = "nixpkgs";
+
+    obsidian-skills = {
+      url = "github:kepano/obsidian-skills";
+      flake = false;
+    };
   };
 
   outputs =

modules/home/cli-apps/opencode/default.nix

@@ -1,6 +1,7 @@
 {
   lib,
   config,
+  inputs,
   ...
 }:
 let
@@ -8,6 +9,19 @@ let
   inherit (lib.metacfg) mkBoolOpt;
 
   cfg = config.metacfg.cli-apps.opencode;
+
+  obsidianSkills =
+    lib.mapAttrs'
+      (
+        name: _:
+        lib.nameValuePair ".agents/skills/${name}" {
+          source = "${inputs.obsidian-skills}/skills/${name}";
+          recursive = true;
+        }
+      )
+      (
+        lib.filterAttrs (_: type: type == "directory") (builtins.readDir "${inputs.obsidian-skills}/skills")
+      );
 in
 {
   options.metacfg.cli-apps.opencode = {
@@ -20,9 +34,12 @@ in
       recursive = true;
     };
 
-    home.file.".agents/skills" = {
-      source = ../../../../config/agents/skills;
-      recursive = true;
-    };
+    home.file = {
+      ".agents/skills" = {
+        source = ../../../../config/agents/skills;
+        recursive = true;
+      };
+    }
+    // obsidianSkills;
   };
 }