From e73b319548ff0a37a4495cc3007ea0f8edc6eb01 Mon Sep 17 00:00:00 2001
From: "molly.computer" <molly@molly.computer>
Date: Tue, 7 Jul 2026 21:40:33 -0400
Subject: [PATCH] Configure helix, vscodium, and git in home-manager

---
 flake.nix |  1 +
 home.nix  | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++---
 notes.md  | 61 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 135 insertions(+), 4 deletions(-)

diff --git a/flake.nix b/flake.nix
index ebbbddc..c43fa3e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,6 +19,7 @@
           {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
+            home-manager.backupFileExtension = "hm-backup";
             home-manager.users.mollyw = import ./home.nix;
           }
         ];
diff --git a/home.nix b/home.nix
index bf1f104..1ac3696 100644
--- a/home.nix
+++ b/home.nix
@@ -16,11 +16,80 @@
 
   programs = {
     home-manager.enable = true;
+
+    helix = {
+      enable = true;
+      defaultEditor = true;
+      settings = {
+        theme = "catppuccin_mocha";
+        editor.line-number = "relative";
+      };
+    };
+
     git = {
       enable = true;
-      settings.user = {
-        name = "molly.computer";
-        email = "molly@molly.computer";
+      settings = {
+        user = {
+          name = "molly.computer";
+          email = "molly@molly.computer";
+        };
+        init.defaultBranch = "main";
+        push.autoSetupRemote = true;
+        pull.rebase = false;
+        core.editor = "hx";
+      };
+    };
+
+    vscodium = {
+      enable = true;
+      profiles.default = {
+        extensions = with pkgs.vscode-extensions; [
+          # Language / dev support
+          rust-lang.rust-analyzer
+          jnoortheen.nix-ide
+          tamasfe.even-better-toml
+          redhat.vscode-yaml
+          yzhang.markdown-all-in-one
+          dbaeumer.vscode-eslint
+          esbenp.prettier-vscode
+
+          # Quality of life
+          usernamehw.errorlens
+          gruntfuggly.todo-tree
+          aaron-bond.better-comments
+
+          # Theme
+          catppuccin.catppuccin-vsc
+
+          # Custom extensions from Open VSX
+          (pkgs.vscode-utils.buildVscodeExtension {
+            pname = "kimi-code";
+            version = "0.5.10";
+            vscodeExtPublisher = "moonshot-ai";
+            vscodeExtName = "kimi-code";
+            vscodeExtUniqueId = "moonshot-ai.kimi-code";
+            src = pkgs.fetchurl {
+              name = "kimi-code.vsix";
+              url = "https://open-vsx.org/api/moonshot-ai/kimi-code/linux-x64/0.5.10/file/moonshot-ai.kimi-code-0.5.10@linux-x64.vsix";
+              sha256 = "1pfdhbcvbb344mvdmmbymzlw8kzgkw6sxl9frmd9jx76pbgx3w9l";
+            };
+          })
+          (pkgs.vscode-utils.buildVscodeExtension {
+            pname = "git-graph";
+            version = "1.30.0";
+            vscodeExtPublisher = "mhutchie";
+            vscodeExtName = "git-graph";
+            vscodeExtUniqueId = "mhutchie.git-graph";
+            src = pkgs.fetchurl {
+              name = "git-graph.vsix";
+              url = "https://open-vsx.org/api/mhutchie/git-graph/1.30.0/file/mhutchie.git-graph-1.30.0.vsix";
+              sha256 = "0bsmvcxl5jg2qzhxx3mm2ki5xqp79mp2hf333m1ka413nvas7fm6";
+            };
+          })
+        ];
+        userSettings = {
+          "workbench.colorTheme" = "Catppuccin Mocha";
+        };
       };
     };
   };
@@ -73,4 +142,4 @@
   '';
 
   home.stateVersion = "25.11";
-}
\ No newline at end of file
+}
diff --git a/notes.md b/notes.md
index 91cc5ea..0e53cbc 100644
--- a/notes.md
+++ b/notes.md
@@ -101,6 +101,67 @@ MIT
 
 ---
 
+## Development environment
+
+The user environment is managed by Home Manager in `home.nix`.
+
+### Editor: Helix
+
+- Package: `pkgs.helix`
+- Default editor (`EDITOR=hx`)
+- Theme: `catppuccin_mocha`
+- Line numbers: relative
+
+### Git
+
+Git is fully configured through `programs.git`:
+
+- User: `molly.computer <molly@molly.computer>`
+- Default branch: `main`
+- `push.autoSetupRemote = true`
+- `pull.rebase = false`
+- Core editor: Helix (`hx`)
+
+### IDE: VSCodium
+
+VSCodium is installed and managed through `programs.vscodium`. The default profile uses the **Catppuccin Mocha** theme and comes with the following extensions:
+
+**Language / dev support**
+- rust-analyzer
+- nix-ide
+- Even Better TOML
+- YAML
+- Markdown All in One
+- ESLint
+- Prettier
+
+**Quality of life**
+- Error Lens
+- Todo Tree
+- Better Comments
+- Git Graph
+
+**Theme**
+- Catppuccin for VSCode
+
+**AI**
+- Kimi Code (`moonshot-ai.kimi-code`)
+
+### Custom Open VSX extensions
+
+Some extensions are not packaged in nixpkgs, so they are built from VSIX files downloaded from Open VSX:
+
+- `moonshot-ai.kimi-code` 0.5.10
+- `mhutchie.git-graph` 1.30.0
+
+The `@` character in the upstream filenames is avoided by renaming the downloads in the `fetchurl` calls.
+
+### Backup behavior
+
+`flake.nix` sets `home-manager.backupFileExtension = "hm-backup"`, so any existing dotfiles that Home Manager wants to overwrite are backed up instead of causing the activation to fail.
+
+---
+
 ## chi / framework 12 — notes to expand later
 
 This section is a placeholder for things to document as the setup settles.
-- 
2.51.2