Add Claude Code CLI and extension by default

Install Claude Code CLI via npm in postCreateCommand and include
the Claude Dev VS Code extension for AI-assisted development.

Changes:
- Added Claude Code CLI installation via npm
- Added anthropic.claude-dev VS Code extension
- Updated postCreateCommand to verify claude installation
- Updated CI tests to check for claude CLI
- Updated README to list Claude Code in features

Signed-off-by: Ihor Dvoretskyi <[email protected]>

Author: idvoretskyi

.devcontainer/devcontainer.json

@@ -41,7 +41,8 @@
                 "github.copilot-chat",
                 "redhat.vscode-yaml",
                 "ms-python.python",
-                "ms-python.vscode-pylance"
+                "ms-python.vscode-pylance",
+                "anthropic.claude-dev"
             ],
             "settings": {
                 "editor.formatOnSave": true,
@@ -53,6 +54,6 @@
             }
         }
     },
-    "postCreateCommand": "python3 --version && node --version && docker --version && gh --version && echo 'Development environment ready'",
+    "postCreateCommand": "npm install -g @anthropic-ai/claude-code && python3 --version && node --version && docker --version && gh --version && claude --version && echo 'Development environment ready'",
     "remoteUser": "vscode"
 }

.github/workflows/ci.yml

@@ -56,10 +56,12 @@ jobs:
             which gh || echo "gh is missing"
             which node || echo "node is missing"
             which npm || echo "npm is missing"
+            which claude || echo "claude is missing"
             # Test essential packages
             python3 --version
             node --version
             docker --version
             gh --version
+            claude --version
             curl --version
             jq --version

README.md

@@ -14,9 +14,11 @@ This repository serves as an optimized GitHub Codespaces template for general de
   - Git (OS-provided)
   - Docker-in-Docker with Docker Compose v2
   - GitHub CLI
+  - Claude Code CLI
   - Zsh with common utilities
   - Build essentials (gcc, make, etc.)
 - VS Code extensions:
+  - Claude Dev (Anthropic)
   - Python language support
   - Docker support
   - GitHub Copilot
@@ -26,11 +28,11 @@ This repository serves as an optimized GitHub Codespaces template for general de
 
 The devcontainer balances speed with operability:
 
-- Includes essential tools: Python, Node.js, Docker, Git, GitHub CLI
+- Includes essential tools: Python, Node.js, Docker, Git, GitHub CLI, Claude Code CLI
 - Disabled package upgrades during build
 - Removed heavy features (kubectl, helm, minikube, sshd)
 - Uses OS-provided Git for faster builds
-- Streamlined postCreateCommand with version checks
+- Installs Claude Code CLI via npm in postCreateCommand
 - Core VS Code extensions only
 
 Estimated startup time: 2-3 minutes