Catches the mistakes coding agents repeat before they merge: a pull-request gate with no model call and no API key.
Short answer: Load GTM/GA4 with lazyOnload after hydration. A synchronous analytics tag blocks hydration, so the page feels slow on a phone.
Group: UI and mobile performance. Status: stable. Generated from the rule definitions; do not edit by hand.
Playground: https://brevio.pro/tools/agent-guard-playground?rule=R1.3
Third-party script deferral: load GTM/GA4 with lazyOnload after hydration.
A synchronous analytics tag blocks hydration, so the page feels slow on a phone.
<script async src="//www.googletagmanager.com/gtag/js?id=G-1"></script>
<Script strategy="lazyOnload" src="//www.googletagmanager.com/gtag/js?id=G-1" />
dev_rules.scan_added_lines); brevio-core scan does not run it.dev_rules.slice_micro_rules).A person can silence one finding with brevio-core: ignore R1.3 -- reason on the line or the line above. Without the reason it does not count. An agent cannot silence it: the agent hook and the MCP tools never honour the comment, and a pull request that adds one is reported until a reviewer allows it. Fixing the code is still the better answer.
A scan reads only the lines you add, so a line that was already in the file is not flagged.
To change what the rule flags, edit its definition in dev_rules.py or code_rules/__init__.py. That is a code change and is reviewed like one.