diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index bd44f4d..cffa44f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,3 +53,8 @@ backlog.md
 backups/
 design/
 stats.jsonl
+
+# Pre-commit nix generated
+.pre-commit-config.yaml
+
+.direnv
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..276d954
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,134 @@
+{
+  "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1767039857,
+        "narHash": "sha256-vNpUSpF5Nuw8xvDLj2KCwwksIbjua2LZCqhV1LNRDns=",
+        "owner": "NixOS",
+        "repo": "flake-compat",
+        "rev": "5edf11c44bc78a0d334f6334cdaf7d60d732daab",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1777988971,
+        "narHash": "sha256-qIoWPDs+0/8JecyYgE3gpKQxW/4bLW/gp45vow9ioCQ=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "0678d8986be1661af6bb555f3489f2fdfc31f6ff",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "gitignore": "gitignore",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1776796298,
+        "narHash": "sha256-PcRvlWayisPSjd0UcRQbhG8Oqw78AcPE6x872cPRHN8=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "3cfd774b0a530725a077e17354fbdb87ea1c4aad",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "git-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1770073757,
+        "narHash": "sha256-Vy+G+F+3E/Tl+GMNgiHl9Pah2DgShmIUBJXmbiQPHbI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "47472570b1e607482890801aeaf29bfb749884f6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1777168982,
+        "narHash": "sha256-GOkGPcboWE9BmGCRMLX3worL4EMnsnG8MyKmXNeYuhQ=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "f5901329dade4a6ea039af1433fb087bd9c1fe14",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1778093112,
+        "narHash": "sha256-18rT4EfMrtYVMQX7AMAEsnv5KhCryLxGolmJ+v+vZdM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "cf9db9282552bb3f2743fc9ed3852d239692089a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "git-hooks": "git-hooks",
+        "nixpkgs": "nixpkgs_2"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..a57f5c9
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,61 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    git-hooks.url = "github:cachix/git-hooks.nix";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-parts,
+      git-hooks,
+      ...
+    }@inputs:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+      ];
+
+      perSystem =
+        {
+          system,
+          ...
+        }:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            config.allowUnfree = true;
+          };
+
+          pre-commit-check = git-hooks.lib.${system}.run {
+            src = ./.;
+            hooks = {
+              nixfmt.enable = true;
+            };
+          };
+        in
+        {
+          formatter = pkgs.nixfmt-tree;
+
+          checks = {
+            inherit pre-commit-check;
+          };
+
+          devShells.default = pkgs.mkShell {
+            inherit (pre-commit-check) shellHook;
+
+            buildInputs = with pkgs; [
+              pre-commit
+              gitleaks
+
+              nixd
+              nodejs_22
+
+              opencode
+            ];
+          };
+        };
+    };
+}