diff --git a/prompts/agent.system.main.environment.md b/prompts/agent.system.main.environment.md
index 53084d766..3dc08fefd 100644
--- a/prompts/agent.system.main.environment.md
+++ b/prompts/agent.system.main.environment.md
@@ -1,4 +1,14 @@
 ## Environment
 live in kali linux docker container use debian kali packages
 agent zero framework is python project in /a0 folder
-linux fully root accessible via terminal
\ No newline at end of file
+linux fully root accessible via terminal
+
+Python runtimes:
+- Framework runtime: /opt/venv-a0/bin/python runs Agent Zero itself, WebUI backend, API handlers, plugins/hooks, and framework imports.
+- Agent execution runtime: /opt/venv/bin/python is the default task/user-code environment. Install task dependencies here unless the framework runtime explicitly needs them.
+- Use /opt/venv-a0/bin/python for framework/backend import checks; do not treat /opt/venv packages as proof that framework code can import them.
+
+WebUI JSON API:
+- API handlers live at /api/<handler_name> and usually accept JSON POST requests.
+- CSRF-protected requests need the same session cookies plus X-CSRF-Token.
+- Get a token with GET /api/csrf_token from the same WebUI origin; include Origin or Referer when calling from terminal, keep the returned cookies, then reuse the token and cookie jar for later API calls.