chore(nix): remove deprecated packages

- Remove opencode flake input (old v1.4.3 URL, superseded)
- Remove code2prompt package
- Remove opencode-desktop package

flake.lock

@@ -3,11 +3,11 @@
     "agents": {
       "flake": false,
       "locked": {
-        "lastModified": 1776092721,
-        "narHash": "sha256-avV4Snqp0K57I9s8D61+GHlg9DYZFSIvjaS4d4RYpG8=",
+        "lastModified": 1777305531,
+        "narHash": "sha256-8GM2Aydq9i8KbvyObqyMYhWkY+e7oh3+eyMfUVnt6Oo=",
         "ref": "refs/heads/master",
-        "rev": "0ad41acb03eee0e22cba611b2171a3d3ee30cb10",
-        "revCount": 72,
+        "rev": "3829556188ee7a5bcdb23afa5ca5d50d6b621085",
+        "revCount": 81,
         "type": "git",
         "url": "https://code.m3ta.dev/m3tam3re/AGENTS"
       },
@@ -39,11 +39,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1775423009,
-        "narHash": "sha256-vPKLpjhIVWdDrfiUM8atW6YkIggCEKdSAlJPzzhkQlw=",
+        "lastModified": 1776877367,
+        "narHash": "sha256-EHq1/OX139R1RvBzOJ0aMRT3xnWyqtHBRUBuO1gFzjI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "68d8aa3d661f0e6bd5862291b5bb263b2a6595c9",
+        "rev": "0726a0ecb6d4e08f6adced58726b95db924cef57",
         "type": "github"
       },
       "original": {
@@ -55,11 +55,11 @@
     },
     "nixpkgs-master": {
       "locked": {
-        "lastModified": 1775657231,
-        "narHash": "sha256-DP8FfybiZPp5WLB9eIk0TC2mdvuYzxLGgrBODDrwPEI=",
+        "lastModified": 1777312179,
+        "narHash": "sha256-AyQh4VtqwzVeLO1uHZ6/pzS6O96nXCXiUQZgCG+3X6k=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "4e03baaa39b7746eac5704d623461422131cd03d",
+        "rev": "20123554ae9affff1a5bc969ad3ad02e839f49cf",
         "type": "github"
       },
       "original": {
@@ -69,27 +69,6 @@
         "type": "github"
       }
     },
-    "opencode": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs-master"
-        ]
-      },
-      "locked": {
-        "lastModified": 1775782812,
-        "narHash": "sha256-m+Ue7FWiTjKMAn1QefAwOMfOb2Vybk0mJPV9zcbkOmE=",
-        "owner": "anomalyco",
-        "repo": "opencode",
-        "rev": "877be7e8e04142cd8fbebcb5e6c4b9617bf28cce",
-        "type": "github"
-      },
-      "original": {
-        "owner": "anomalyco",
-        "ref": "v1.4.3",
-        "repo": "opencode",
-        "type": "github"
-      }
-    },
     "openspec": {
       "inputs": {
         "nixpkgs": [
@@ -97,11 +76,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1775372219,
-        "narHash": "sha256-MJakKC026Sarz7nMmiFrfONWc4xgaw8ApV0Hhp4ebhM=",
+        "lastModified": 1776788052,
+        "narHash": "sha256-L4LBHVVtgMhSJm+IzZSYOR0UXPbvIRg4xiEV5urYxdI=",
         "owner": "Fission-AI",
         "repo": "OpenSpec",
-        "rev": "64d476f8b924bb9b74b896ea0aa784970e37da69",
+        "rev": "3c7a05c5dc88b2397c478805890b55ed392b19e8",
         "type": "github"
       },
       "original": {
@@ -116,7 +95,6 @@
         "basecamp": "basecamp",
         "nixpkgs": "nixpkgs",
         "nixpkgs-master": "nixpkgs-master",
-        "opencode": "opencode",
         "openspec": "openspec"
       }
     }