chore(agents): add agents files (#11497)

apps/login/AGENTS.md

@@ -0,0 +1,24 @@
+# ZITADEL Login App Guide for AI Agents
+
+## Context
+The **Login App** (`apps/login`) provides the user interface for authentication flows (Login, Register, MFA, etc.). It is built with Next.js and React.
+
+## Key Technology
+- **Framework**: Next.js (React).
+- **Styling**: TailwindCSS, configured via `apps/login/tailwind.config.mjs`.
+- **Data Fetching**: Primarily server-side interaction with ZITADEL APIs via `@zitadel/client` or direct gRPC calls where applicable.
+- **Language**: TypeScript.
+
+## Architecture & Conventions
+- **Routing**: Uses the Next.js App Router (routes are defined under `src/app/`).
+- **Composability**: Components should be small and reusable.
+- **State**: Critical authentication state is often managed via URL parameters (Auth Requests) and cookies/sessions.
+- **Scope Rule**: For shared API typings and client behavior, also read `packages/AGENTS.md` and `proto/AGENTS.md`.
+
+## Verified Nx Targets
+- **Dev Server**: `pnpm nx run @zitadel/login:dev`
+- **Build**: `pnpm nx run @zitadel/login:build`
+- **Lint**: `pnpm nx run @zitadel/login:lint`
+- **Test (all)**: `pnpm nx run @zitadel/login:test`
+- **Test (unit)**: `pnpm nx run @zitadel/login:test-unit`
+- **Test (integration)**: `pnpm nx run @zitadel/login:test-integration`