diff --git a/.gitignore b/.gitignore
index eb5a316..e0b5492 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,25 @@
 target
+
+/target
+
+# devenv
+.devenv*
+devenv.local.nix
+devenv.local.yaml
+
+# direnv
+.direnv
+
+# pre-commit / git-hooks
+.pre-commit-config.yaml
+.vim
+AGENTS.md
+CLAUDE.md
+.mcp.json
+.codex/
+opencode.json
+.claude/
+.agents/
+.opencode/
+.explained/
+*.kickstart-new
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..4d7eac7
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# crabidy
diff --git a/devenv-rust.nix b/devenv-rust.nix
new file mode 100644
index 0000000..d15ab1a
--- /dev/null
+++ b/devenv-rust.nix
@@ -0,0 +1,61 @@
+{ pkgs, lib, ... }:
+
+{
+  packages = with pkgs; [
+    bacon
+    cargo-deny
+    cargo-duplicates
+    cargo-expand
+    cargo-features-manager
+    cargo-flamegraph
+    cargo-geiger
+    cargo-generate
+    cargo-hack
+    cargo-insta
+    cargo-llvm-cov
+    cargo-machete
+    cargo-mutants
+    cargo-nextest
+    cargo-rr
+    cargo-udeps
+    cargo-vet
+    cargo-workspaces
+    git
+    sccache
+    tokio-console
+    vulkan-tools
+  ];
+  env.RUSTC_WRAPPER = "sccache";
+  # https://devenv.sh/languages/
+  languages.rust = {
+    enable = true;
+    channel = "stable";
+    clangLinker.enable = true;
+    mold.enable = true;
+    rustflags = lib.concatStringsSep " " [
+    ];
+    components = [
+      "rustc"
+      "cargo"
+      "clippy"
+      "rustfmt"
+      "rust-analyzer"
+    ];
+  };
+  tasks."devenv:git-hooks:prepare-shared-hooks-rust" = {
+    exec = ''
+      if hooks_dir="$(git rev-parse --git-path hooks 2>/dev/null)"; then
+        mkdir -p "$hooks_dir"
+        chmod u+rwx,g+rwx "$hooks_dir" 2>/dev/null || true
+        find "$hooks_dir" -maxdepth 1 -type f ! -user "$(id -un)" ! -name '*.sample' -delete 2>/dev/null || true
+      fi
+    '';
+    after = [ "devenv:files" ];
+    before = [ "devenv:git-hooks:install" ];
+  };
+
+  git-hooks.hooks = {
+    rustfmt.enable = true;
+    clippy.enable = true;
+  };
+}
diff --git a/devenv.lock b/devenv.lock
new file mode 100644
index 0000000..80570d5
--- /dev/null
+++ b/devenv.lock
@@ -0,0 +1,141 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1784325378,
+        "narHash": "sha256-Gof6j4d43yX2qSLLp78JILke346IggDFIxTgl3ecVQE=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "5f1cf17be0fc48689bd0ecb810de6d2e06d259a1",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "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"
+      }
+    },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1784288435,
+        "narHash": "sha256-ReRHaLgr/uVqdD8afFSn+myXIfpHeOhP0yYe0TJqAA8=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "43b3c1ab9d40fb1dbb008f451988a91e375825e9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "inputs": {
+        "nixpkgs-src": "nixpkgs-src"
+      },
+      "locked": {
+        "lastModified": 1783345554,
+        "narHash": "sha256-LZhOm4kqjHUnwP4CNHpaqqEVcumGNd1PvOEOad8LkS0=",
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "6004ea8c229fe9d41b21c6f4c76bf6c2e10771dd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1783279667,
+        "narHash": "sha256-/NAkDSsve+GNM0Bt6tleJdCGfsTlK89nPjkVOzZMo0s=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f205b5574fd0cb7da5b702a2da51507b7f4fdd1b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1784453100,
+        "narHash": "sha256-zpGZb8FYui+i8KLtC0nlcmb0voR2zB80Qn8pe7lzIbk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "b471514bed69eff5255c8e63c1f80e5fe56c616f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "git-hooks": "git-hooks",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1784438913,
+        "narHash": "sha256-NYF7ZM5ip0u+w1pBFDpIGEbrbgN/wpnLFAmBkWkYMXw=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "afacd6819d3765a05814ee8e3de74c77d42ac799",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
\ No newline at end of file
diff --git a/devenv.nix b/devenv.nix
new file mode 100644
index 0000000..0b40265
--- /dev/null
+++ b/devenv.nix
@@ -0,0 +1,72 @@
+{
+  pkgs,
+  lib,
+  config,
+  inputs,
+  ...
+}:
+
+let
+  pkgs-unstable = import inputs.nixpkgs-unstable { system = pkgs.stdenv.system; };
+  commonLibs = with pkgs; [ alsa-lib ];
+
+  extraPackages = with pkgs; [
+    pkg-config
+  ];
+in
+{
+  imports = [ ./devenv-rust.nix ];
+
+  env = {
+    LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath commonLibs;
+  };
+
+  # https://devenv.sh/packages/
+  packages = commonLibs ++ extraPackages;
+
+  # https://devenv.sh/processes/
+  # processes.cargo-watch.exec = "cargo-watch";
+
+  # https://devenv.sh/services/
+  # services.postgres.enable = true;
+
+  # https://devenv.sh/scripts/
+  scripts.hello.exec = ''
+    echo Welcome to rust devenv
+  '';
+
+  enterShell = "";
+
+  # https://devenv.sh/tasks/
+  # tasks = {
+  #   "myproj:setup".exec = "mytool build";
+  #   "devenv:enterShell".after = [ "myproj:setup" ];
+  # };
+
+  # https://devenv.sh/tests/
+  enterTest = ''
+    echo "Running tests"
+  '';
+  # https://devenv.sh/git-hooks/
+  git-hooks.hooks = {
+    nixfmt.enable = true;
+    taplo.enable = true;
+    markdownlint.enable = true;
+    shellcheck.enable = true;
+  };
+
+  # https://devenv.sh/integrations/claude-code/
+  # Claude Code integration: writes .claude/{settings,commands,agents}. We keep
+  # ownership of .mcp.json (skills wiring), so stop devenv from writing it.
+  claude.code.enable = true;
+  claude.code.mcpServers = lib.mkForce { };
+  claude.code.hooks.git-hooks-run.command = ''
+    f=$(${pkgs.jq}/bin/jq -r '.tool_input.file_path // empty')
+    if [ -n "$f" ]; then
+      cd "''${CLAUDE_PROJECT_DIR:-.}"
+      ${lib.getExe config.git-hooks.package} run --files "$f"
+    fi
+  '';
+
+  # See full reference at https://devenv.sh/reference/options/
+}
diff --git a/devenv.yaml b/devenv.yaml
new file mode 100644
index 0000000..4813749
--- /dev/null
+++ b/devenv.yaml
@@ -0,0 +1,16 @@
+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+  nixpkgs-unstable:
+    url: github:nixos/nixpkgs/nixpkgs-unstable
+  rust-overlay:
+    url: github:oxalica/rust-overlay
+    inputs:
+      nixpkgs:
+        follows: nixpkgs
+  git-hooks:
+    url: github:cachix/git-hooks.nix
+    inputs:
+      nixpkgs:
+        follows: nixpkgs
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..292fe49
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "stable"