fix(ci): resolve nix-update workflow issues

- Remove --use-update-script flag that breaks with flake-only repos
  (nix-update-script expects default.nix at repo root)
- Fix GitHub API jq filter for detecting prereleases
- Fix Summary step bash syntax for handling input variables
- Format lib/ files that were failing formatting check

lib/default.nix

@@ -3,10 +3,10 @@
 #   let
 #     m3taLib = inputs.m3ta-nixpkgs.lib.${system};
 #   in ...
-{ lib }: {
+{lib}: {
   # Port management utilities
-  ports = import ./ports.nix { inherit lib; };
+  ports = import ./ports.nix {inherit lib;};
 
   # OpenCode rules injection utilities
-  opencode-rules = import ./opencode-rules.nix { inherit lib; };
+  opencode-rules = import ./opencode-rules.nix {inherit lib;};
 }

lib/opencode-rules.nix

@@ -30,7 +30,7 @@
 #
 # The instructions list contains paths relative to the project root, all prefixed
 # with `.opencode-rules/`, making them portable across different project locations.
-{ lib }: {
+{lib}: {
   # Create Opencode rules configuration from AGENTS repository
   #
   # Args:
@@ -69,42 +69,48 @@
   #   #     ".opencode-rules/frameworks/fastapi.md"
   #   #   ];
   #   # }
-  mkOpencodeRules = { agents, languages ? [ ], concerns ? [
-    "coding-style"
-    "naming"
-    "documentation"
-    "testing"
-    "git-workflow"
-    "project-structure"
-  ], frameworks ? [ ], extraInstructions ? [ ] }:
-    let
-      rulesDir = ".opencode-rules";
+  mkOpencodeRules = {
+    agents,
+    languages ? [],
+    concerns ? [
+      "coding-style"
+      "naming"
+      "documentation"
+      "testing"
+      "git-workflow"
+      "project-structure"
+    ],
+    frameworks ? [],
+    extraInstructions ? [],
+  }: let
+    rulesDir = ".opencode-rules";
 
-      # Build instructions list by mapping concerns, languages, frameworks to their file paths
-      # All paths are relative to project root via the rulesDir symlink
-      instructions = (map (c: "${rulesDir}/concerns/${c}.md") concerns)
-        ++ (map (l: "${rulesDir}/languages/${l}.md") languages)
-        ++ (map (f: "${rulesDir}/frameworks/${f}.md") frameworks)
-        ++ extraInstructions;
+    # Build instructions list by mapping concerns, languages, frameworks to their file paths
+    # All paths are relative to project root via the rulesDir symlink
+    instructions =
+      (map (c: "${rulesDir}/concerns/${c}.md") concerns)
+      ++ (map (l: "${rulesDir}/languages/${l}.md") languages)
+      ++ (map (f: "${rulesDir}/frameworks/${f}.md") frameworks)
+      ++ extraInstructions;
 
-      # Generate JSON configuration for Opencode
-      opencodeConfig = {
-        "$schema" = "https://opencode.ai/config.json";
-        inherit instructions;
-      };
-    in {
+    # Generate JSON configuration for Opencode
+    opencodeConfig = {
+      "$schema" = "https://opencode.ai/config.json";
       inherit instructions;
-
-      # Shell hook to set up rules in the project
-      # Creates a symlink to the AGENTS rules directory and generates opencode.json
-      shellHook = ''
-        # Create/update symlink to AGENTS rules directory
-        ln -sfn ${agents}/rules ${rulesDir}
-
-        # Generate opencode.json configuration file
-        cat > opencode.json <<'OPENCODE_EOF'
-        ${builtins.toJSON opencodeConfig}
-        OPENCODE_EOF
-      '';
     };
+  in {
+    inherit instructions;
+
+    # Shell hook to set up rules in the project
+    # Creates a symlink to the AGENTS rules directory and generates opencode.json
+    shellHook = ''
+      # Create/update symlink to AGENTS rules directory
+      ln -sfn ${agents}/rules ${rulesDir}
+
+      # Generate opencode.json configuration file
+      cat > opencode.json <<'OPENCODE_EOF'
+      ${builtins.toJSON opencodeConfig}
+      OPENCODE_EOF
+    '';
+  };
 }