AGENTS: enforce branch-first sessions and no direct main/base edits#20

NagyVikt merged 1 commit intomainrecodeee/gitguardex:mainfrom

agent/codex/20260411-144118-lajos-edix-hu-no-direct-main-branch-edits-policyrecodeee/gitguardex:agent/codex/20260411-144118-lajos-edix-hu-no-direct-main-branch-edits-policyCopy head branch name to clipboard