diff --git a/CLAUDE.md b/CLAUDE.md
index 6194c322..51aa3d3c 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -2,11 +2,21 @@
 
 ## Current State
 
-ASP.NET host (`Aeroflot.Flights.Web.csproj`, `Startup.cs`, `Program.cs`) serving an Angular 12 SPA located in `ClientApp/` (Angular CLI + custom webpack config, Karma, Cypress, Storybook/Compodoc).
+React 18 SSR application built with **Modern.js 2.70.8** (Rspack bundler) and **Module Federation 2.3.3**. The app is a remote frontend component embeddable in the customer's channel apps (Web, PWA).
 
-## Target: React Remote Component Rewrite
+**Stack:** Modern.js 2.70.8, React 18.2, Rspack, Module Federation 2.3.3, i18next (9 languages), PrimeReact, Leaflet, SignalR, OpenTelemetry, Vitest, Playwright.
 
-The Angular app is being rewritten as a **remote frontend component** embeddable in the customer's channel apps (Web, PWA). Requirements below are contractual — treat them as hard constraints when designing or implementing the new codebase.
+**Source:** `src/` (file-based routing under `src/routes/`). Legacy Angular 12 SPA in `ClientApp/` (read-only reference, not deployed).
+
+**Builds:** `pnpm build:standalone` (SSR server at `dist/standalone/`), `pnpm build:remote` (MF remote at `dist/remote/` with `mf-manifest.json`).
+
+**Dev:** `pnpm dev` (Modern.js on :8081), `pnpm dev:full` (proxy on :8080 with API forwarding via curl to bypass WAF).
+
+**Known constraint:** Modern.js 3.x upgrade is blocked by `@module-federation/modern-js` ESM incompatibilities (broken `__filename`/`require` in ESM bundles, missing `api.modifyWebpackConfig` in Rsbuild 2.0). React Router v7 future flags are enabled to suppress deprecation warnings.
+
+## Contractual Requirements
+
+The following are contractual hard constraints for the remote frontend component.
 
 ### 1. Tech Stack