more readme

README.md

@@ -5,9 +5,12 @@ An opinionated php module for
 
 ## Features
 
-Included checks:
+The following checks are automatically enabled if your project contains the
+relevant configuration files:
 
 - php-cs-checker
+- psalm
+- phpstan
 
 ## Usage
 
@@ -24,3 +27,21 @@ Included checks:
     flakelight-php ./. {};
 }
 ```
+
+## CI Usage
+
+```yaml
+name: "CI"
+on:
+  pull_request:
+  push:
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v26
+        # insert cache setup here
+      - run: nix flake check --keep-going
+```