Add standardized installation, composer.json, release workflow

- Add composer.json for PHP distribution via netresearch/agent-netresearch-branding
- Update README.md with three installation methods (marketplace, release, composer)
- Add GitHub Actions release workflow for packaging
- Add MIT LICENSE

Author: CybotTM

.github/workflows/release.yml

@@ -0,0 +1,51 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    name: Create Release
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
+        with:
+          egress-policy: audit
+
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Get version from tag
+        id: version
+        run: echo "version=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+
+      - name: Create skill package
+        run: |
+          mkdir -p dist
+          cp SKILL.md dist/
+          cp LICENSE dist/
+          [ -d "references" ] && cp -r references dist/
+          [ -d "scripts" ] && cp -r scripts dist/
+          [ -d "assets" ] && cp -r assets dist/
+          [ -d "templates" ] && cp -r templates dist/
+          [ -d "skills" ] && cp -r skills dist/
+          cd dist
+          zip -r ../netresearch-branding-${{ steps.version.outputs.version }}.zip .
+          tar -czvf ../netresearch-branding-${{ steps.version.outputs.version }}.tar.gz .
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@c95fe1489396fe8a9eb87c0abf8aa5b2ef267fda # v2.2.1
+        with:
+          files: |
+            netresearch-branding-${{ steps.version.outputs.version }}.zip
+            netresearch-branding-${{ steps.version.outputs.version }}.tar.gz
+          generate_release_notes: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Netresearch DTT GmbH
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -51,14 +51,19 @@ This skill provides complete brand guidelines, reference documentation, and read
 
 ## Installation
 
-### Via Claude Code Marketplace
+### Option 1: Via Netresearch Marketplace (Recommended)
 
 ```bash
 /plugin marketplace add netresearch/claude-code-marketplace
-/plugin install netresearch-branding
 ```
 
-### Manual Installation
+Then browse skills with `/plugin`.
+
+### Option 2: Download Release
+
+Download the [latest release](https://github.com/netresearch/netresearch-branding-skill/releases/latest) and extract to `~/.claude/skills/netresearch-branding/`
+
+### Option 3: Manual Installation
 
 ```bash
 # Using curl

composer.json

@@ -0,0 +1,20 @@
+{
+  "name": "netresearch/agent-netresearch-branding",
+  "description": "Apply Netresearch brand identity and design standards to web projects, documentation, presentations, and digital content. This skill should be used when creating branded materials, designing web inter",
+  "type": "ai-agent-skill",
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Netresearch DTT GmbH",
+      "email": "plugins@netresearch.de",
+      "homepage": "https://www.netresearch.de/",
+      "role": "Manufacturer"
+    }
+  ],
+  "require": {
+    "netresearch/composer-agent-skill-plugin": "*"
+  },
+  "extra": {
+    "ai-agent-skill": "SKILL.md"
+  }
+}