# Runtime Gate Model

The browser currently demonstrates the following gate pattern:

```text
browser event
→ HIR/OAM evaluation
→ GREEN / YELLOW / RED gate
→ action
→ audit-chain event
```

## Example browser event types

- address bar navigation
- main frame request
- page text pressure scan
- permission request
- memory admission / set-cookie
- cookie changed
- download request
- mode changed

## Gate behavior

GREEN: allow

YELLOW: allow with review, isolate, require review, observe and log

RED: hard-stop, block, quarantine, show RED hard-stop page