Add podman compose requirement to development workflow

Clarify PHP environment dependency and port usage
for development site access

AGENT.md

@@ -25,6 +25,9 @@ All edits to this AGENT.md file should be done in a compressed shortform for LLM
 **Templates:** Escape output (`htmlspecialchars()` for UGC). Short echo tags (`<?= $var ?>`).
 
 ## Development Environment and workflow
+
+The host does not have PHP, always use `podman compose` with the `compose.yaml` configuration when interacting with the app through CLI. Check localhost:4040 when you need to look at the development site to check your changes.
+
 **LLM Agent Testing Protocol:**
 **Container isolation:** ALL test data (CSV, temp files, generated content) MUST remain inside container filesystem (not mounted volumes)
 *Testing website:** `curl localhost:4040/path` to fetch pages, test forms with `curl -X POST -d "field=value" localhost:4040/path`