diff --git a/docs/knowledge-index-base.md b/docs/knowledge-index-base.md
index 94df73f..d077d73 100644
--- a/docs/knowledge-index-base.md
+++ b/docs/knowledge-index-base.md
@@ -4,10 +4,11 @@ This is an Acai CMS website project. Follow these instructions when working with
 
 ## Environment
 
-- The site runs in Docker. The public URL is the project's domain (e.g. `https://username_domain.forge.acaisuite.com/`)
-- You can make HTTP requests to test pages, APIs, or form submissions using the project's public URL
-- If you need to inspect the live site, use browser tools (Playwright MCP) or HTTP requests to the project URL
-- **NEVER use localhost:8080** — that does not resolve in this environment. Always use the project's actual URL.
+- The site runs in Docker. The development URL is provided via `ACAI_WEB_URL` environment variable (e.g. `https://username_domain.forge.acaisuite.com/`)
+- **ALWAYS use `ACAI_WEB_URL` for fetch, Playwright, and any HTTP request.** This is the local development copy.
+- **NEVER navigate to the production domain** (e.g. `keepsailing.es`, `tienda.com`). The production site is NOT your development environment. Only use the forge URL.
+- **NEVER use localhost:8080** — that does not resolve in this environment.
+- If `ACAI_WEB_URL` is not available, check the `.acai` file for `local_web_url`.
 
 ## Project Structure