flake: extract devShell.nix and drop flake-compat shell.nix

flake.lock

@@ -1,38 +1,5 @@
 {
   "nodes": {
-    "bun2nix": {
-      "inputs": {
-        "flake-parts": [
-          "llm-agents",
-          "flake-parts"
-        ],
-        "nixpkgs": [
-          "llm-agents",
-          "nixpkgs"
-        ],
-        "systems": [
-          "llm-agents",
-          "systems"
-        ],
-        "treefmt-nix": [
-          "llm-agents",
-          "treefmt-nix"
-        ]
-      },
-      "locked": {
-        "lastModified": 1782772816,
-        "narHash": "sha256-s9BuFv0mRuZx9C1MF8qPHRdcAK14ONi0A5m6E2wqOoM=",
-        "owner": "nix-community",
-        "repo": "bun2nix",
-        "rev": "5a39d717029e94163ac223aee8d5c9946cafed1c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "bun2nix",
-        "type": "github"
-      }
-    },
     "fenix": {
       "inputs": {
         "nixpkgs": [
@@ -68,51 +35,6 @@
         "url": "https://git.lix.systems/lix-project/flake-compat/archive/main.tar.gz"
       }
     },
-    "flake-parts": {
-      "inputs": {
-        "nixpkgs-lib": [
-          "llm-agents",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1782949081,
-        "narHash": "sha256-vp6Y/Grm98ESt6ceOkWiHWyZRDV3J1RID4w+6NWK9yA=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "17c9d6cdfc60c64f4ee8d306f9bc0b4ccb51481e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "type": "github"
-      }
-    },
-    "llm-agents": {
-      "inputs": {
-        "bun2nix": "bun2nix",
-        "flake-parts": "flake-parts",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "systems": "systems",
-        "treefmt-nix": "treefmt-nix"
-      },
-      "locked": {
-        "lastModified": 1784096685,
-        "narHash": "sha256-b32HyAoqQdgQstUBblZ5Nnk5M62yiOhpgpJVJohJ+k0=",
-        "owner": "numtide",
-        "repo": "llm-agents.nix",
-        "rev": "d9654e7480b8146fddd709dbe5d12668bb34fa74",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "llm-agents.nix",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1784007870,
@@ -133,7 +55,6 @@
       "inputs": {
         "fenix": "fenix",
         "flake-compat": "flake-compat",
-        "llm-agents": "llm-agents",
         "nixpkgs": "nixpkgs"
       }
     },
@@ -153,42 +74,6 @@
         "repo": "rust-analyzer",
         "type": "github"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
-    "treefmt-nix": {
-      "inputs": {
-        "nixpkgs": [
-          "llm-agents",
-          "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",