Complete automated testing

README.md

@@ -141,10 +141,47 @@ Total: 156.8GB
 └─ 📁 Desktop                                        12.7GB
 ```
 
+## Development
+
+### Setup
+
+Install development tools:
+
+```bash
+brew install shfmt shellcheck bats-core
+```
+
+### Code Quality
+
+Format and lint shell scripts:
+
+```bash
+# Format all scripts
+./scripts/format.sh
+
+# Check without modifying
+./scripts/format.sh --check
+
+# Install git hooks for auto-formatting
+./scripts/install-hooks.sh
+```
+
+See [scripts/README.md](scripts/README.md) for detailed development workflow.
+
+### Testing
+
+Run automated tests:
+
+```bash
+./tests/run.sh
+```
+
+GitHub Actions automatically runs tests and formatting checks on PRs.
+
 ## Support
 
 - If Mole reclaimed storage for you, consider starring the repo or sharing it with friends needing a cleaner Mac.
-- Have ideas or fixes? Open an issue or PR and help shape Mole’s roadmap together with the community.
+- Have ideas or fixes? Open an issue or PR and help shape Mole's roadmap together with the community.
 - Love cats? Treat Tangyuan and Cola to canned food via <a href="https://miaoyan.app/cats.html?name=Mole" target="_blank">this link</a> and keep the mascots purring.
 
 ## License