diff --git a/AGENTS.md b/AGENTS.md
index c257133..98d0d4b 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -206,3 +206,98 @@ Key inputs:
 - `sops-nix` - Secrets management
 - `lanzaboote` - Secure boot
 - `jovian` - Steam Deck support (allyx)
+
+## Lib Module (`lib/`)
+
+Custom utility library exposed via `lib.mjallen.*` through Snowfall Lib. Used for creating modules and managing versions.
+
+### Directory Structure
+```
+lib/
+├── default.nix          # Entry point: exports module, file, versioning
+├── README.md            # Detailed documentation
+├── module/              # Module creation helpers
+│   └── default.nix
+├── file/                # File/path utilities
+│   └── default.nix
+└── versioning/          # Multi-source version pinning
+    └── default.nix
+```
+
+### Module Utilities (`lib.mjallen.module`)
+
+**`mkModule`** - Create NixOS service modules with standardized options:
+```nix
+lib.mjallen.module.mkModule {
+  config, name, description, options, moduleConfig, domain ? "services"
+}
+```
+Standard options: `enable`, `port`, `reverseProxy`, `firewall`, `createUser`, `configureDb`, `redis`, `puid`, `pgid`, `timeZone`, etc.
+
+**`mkContainerService`** - For Podman/OCI containers (auto-generates container definition):
+```nix
+lib.mjallen.module.mkContainerService {
+  config, name, image, internalPort, description, options, volumes, environment
+}
+```
+
+**`mkSopsEnvFile`** - Generate SOPS secrets + template env-file:
+```nix
+lib.mjallen.module.mkSopsEnvFile {
+  secrets, name, content, restartUnit, owner, group, mode, sopsFile
+}
+```
+
+**Option Helpers:**
+- `mkOpt type default description` - Standard option
+- `mkBoolOpt default description` - Boolean option
+- `mkReverseProxyOpt name` - Caddy reverse proxy sub-options
+
+**Convenience Shorthands:**
+- `enabled` = `{ enable = true; }`
+- `disabled` = `{ enable = false; }`
+
+### Home Manager Utilities
+
+**`mkHomeModule`** - Create Home Manager modules:
+```nix
+lib.mjallen.module.mkHomeModule {
+  config, domain, name, description, options, moduleConfig
+}
+```
+
+### File Utilities (`lib.mjallen.file`)
+
+- `readFile path` - Read file contents
+- `pathExists path` - Check if path exists
+- `safeImport path default` - Safe Nix import
+- `getFile relativePath` - Get path relative to flake root
+- `importModulesRecursive path` - Recursively discover Nix modules
+- `scanSystems systemsPath` - Discover system configurations
+- `filterNixOSSystems systems` - Filter for Linux systems
+- `filterDarwinSystems systems` - Filter for macOS systems
+- `scanHomes homesPath` - Parse home-manager configurations
+
+### Versioning Utilities (`lib.mjallen.versioning`)
+
+For packages with `version.json` (multi-variant source pinning):
+
+- `selectVariant spec variantName system` - Select variant from spec
+- `render value variables` - Template substitution (`${var}`)
+- `mkSrc pkgs comp variables` - Build single source
+- `mkAllSources pkgs selected` - Build all sources for selected variant
+
+See `lib/versioning/default.nix` for full API and `docs/version.schema.json` for schema.
+
+### Usage in Packages
+
+Create `packages/<name>/version.json` with variant definitions, then use:
+```nix
+let
+  versioning = inputs.self.lib.mjallen.versioning;
+  spec = inputs.self.lib.mjallen.file.readFile ./version.json;
+  selected = versioning.selectVariant spec variantName system;
+  sources = versioning.mkAllSources pkgs selected;
+in
+# Use sources.componentName for each source
+```
diff --git a/checks/pre-commit-hooks/default.nix b/checks/pre-commit-hooks/default.nix
index e8597b2..8044db9 100644
--- a/checks/pre-commit-hooks/default.nix
+++ b/checks/pre-commit-hooks/default.nix
@@ -18,5 +18,12 @@ pre-commit-hooks-nix.lib.${pkgs.stdenv.hostPlatform.system}.run {
         lib.snowfall.fs.get-file "treefmt.nix"
       );
     };
+    nixfmt-rfc-style = {
+      enable = true;
+      package = pkgs.nixfmt-rfc-style;
+    };
+    statix = {
+      enable = true;
+    };
   };
 }
diff --git a/modules/home/programs/opencode/default.nix b/modules/home/programs/opencode/default.nix
index 293c0a3..6b4d71b 100644
--- a/modules/home/programs/opencode/default.nix
+++ b/modules/home/programs/opencode/default.nix
@@ -46,8 +46,8 @@ in
                   output = [ "text" ];
                 };
                 limit = {
-                  context = 262144;
-                  output = 262144;
+                  context = 131072;
+                  output = 32768;
                 };
               };
             };
diff --git a/modules/nixos/services/ai/default.nix b/modules/nixos/services/ai/default.nix
index d662ace..c100d27 100755
--- a/modules/nixos/services/ai/default.nix
+++ b/modules/nixos/services/ai/default.nix
@@ -68,7 +68,7 @@ let
             "30"
             "--jinja"
             "--ctx-size"
-            "4096"
+            "131072"
             "--threads"
             "8"
             "--batch-size"
diff --git a/modules/nixos/system/default.nix b/modules/nixos/system/default.nix
index a9e6a65..ad2ebac 100644
--- a/modules/nixos/system/default.nix
+++ b/modules/nixos/system/default.nix
@@ -11,6 +11,7 @@ in
       brightnessctl
       dconf
       disko
+      kdiskmark
       nil
       nix-output-monitor
       nixos-anywhere