Chromium browser provider for agentproto: a defineBrowser provider that launches Playwright's Chromium on a dedicated profile dir, with an idempotent launch, CDP access and a BrowserDriver.

System Chrome provider for agentproto: a defineBrowser provider that launches the installed Chrome on a fresh dedicated profile dir, attaches over CDP and injects granted cookies. Never touches the default profile.

Camofox browser provider for agentproto: a defineBrowser provider over the camofox stealth-Firefox REST server, with an idempotent launch, a health mapping, and a BrowserDriver.

Browser provider kit: defineBrowser (manifest + launch), the BrowserInstance and BrowserDriver ports, a provider registry, a provider-kit lister, and a typed capability gate (browser:unsupported).