Zero-Network Agent Guard & Rule Playground
Simulate coding-agent diffs against Brevio’s deterministic AST/regex catalog (brevio-core==0.8.1) in real time. Everything runs client-side inside your browser sandbox with zero network calls. Inspect defects, apply 1-click clean fixes, and export a ready-to-drop Agent Config Pack.
Test mocks `./auth`, the exact unit under test. It executes mock stubs instead of real production code.
vi.mock("./auth", () => ({`waitForTimeout()` introduces flaky race conditions and artificial test latency (Preview rule in brevio-core v0.8.1: emits WARN without blocking CI).
await page.waitForTimeout(2000);Every assertion in this test uses weak matchers (`toBeDefined` / `toBeTruthy`), which pass on almost any object.
expect(...).toBeDefined() / toBeTruthy()While the playground applies deterministic clean fixes 1-click in your browser, Autonomous PR Auto-Healing intercepts broken diffs in sandboxed background worktrees, and Brevio Team Sync synchronizes suppression rules and approvals across your squad.
Explore the Full Zero-Network Developer Tools Suite
Test your instincts in the 6-Round Agent Bug Challenge (Tool #187) or generate /llms.txt and /skill.md offline (Tool #185).