diff --git a/.agents/AGENTS.md b/.agents/AGENTS.md
index 35a45e227..c5ff1742e 100644
--- a/.agents/AGENTS.md
+++ b/.agents/AGENTS.md
@@ -168,7 +168,7 @@ cvix/
 ## Key Stack
 
 - **Frontend**: Vue 3.5, Vite, TailwindCSS 4, Pinia, Zod, Vitest, Playwright
-- **Backend**: Spring Boot 3.5, Kotlin 2.2, WebFlux, R2DBC, PostgreSQL
+- **Backend**: Spring Boot 4.0, Kotlin 2.2, WebFlux, R2DBC, PostgreSQL
 - **Testing**: JUnit 5, Kotest, Testcontainers, MockK
 
 ## Available Skills
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a3bf9023c..8b5979537 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,29 +5,41 @@ Thanks for your interest! This guide summarizes how to set up the environment, r
 ## Requirements
 
 - Java 21 (Temurin)
-- Node.js 22 and pnpm 10
+- Node.js 24.12.0 and pnpm 10+
 - Docker (for Postgres/Testcontainers)
 - Git
 
 ## Quick setup
 
+The project uses a centralized `Makefile` to simplify development.
+
 ```bash
-pnpm install
-./gradlew --version
+make prepare-env   # Setup .env and config files
+make install       # Install Node & Gradle dependencies
+make ssl-cert      # Generate dev SSL certs
 ```
 
 ### Backend
 
 ```bash
-./gradlew build
+make backend-build  # Build backend
+make backend-run    # Run backend services (Postgres, Keycloak) and application
 ```
 
 ### Frontend
 
 ```bash
-pnpm -r run lint --if-present
-pnpm -r run test --if-present
-pnpm -r run build --if-present
+make lint           # Frontend linting
+make test           # Frontend unit tests
+make build          # Build all frontend apps
+```
+
+### Verification
+
+Always run this command before opening a PR:
+
+```bash
+make verify-all     # Full project verification (lint, test, build)
 ```
 
 ### Database
diff --git a/README.md b/README.md
index e4830b396..bb84214e3 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ ProFileTailors is a **production-grade platform** for creating, customizing, and
   - Atomic, semantic styling driven by a token-based design system
 
 - ⚡ **Reactive, modular backend:**
-  - Kotlin + Spring Boot 3 (WebFlux, non-blocking I/O)
+  - Kotlin 2.2 + Spring Boot 4.0 (WebFlux, non-blocking I/O)
   - PostgreSQL, R2DBC, ensemble of unit/integration tests
   - Hexagonal (clean) architecture: domain, application, infrastructure separated like real professionals do
 
@@ -95,7 +95,7 @@ ProFileTailors is a **production-grade platform** for creating, customizing, and
 
 ### 🏗️ Backend
 
-- 👩‍💻 Kotlin 2, Spring Boot 3 (WebFlux, reactive)
+- 👩‍💻 Kotlin 2.2, Spring Boot 4.0 (WebFlux, reactive)
 - 🐘 PostgreSQL (UUIDs, RLS), R2DBC, Liquibase
 - 🛡️ Keycloak 26, OAuth2 Resource Server
 - 🧪 JUnit5, Kotest, MockK, Testcontainers
diff --git a/client/apps/docs/src/content/docs/developer-guide/developer-guide.md b/client/apps/docs/src/content/docs/developer-guide/developer-guide.md
index 9fa0eb666..c1462cc26 100644
--- a/client/apps/docs/src/content/docs/developer-guide/developer-guide.md
+++ b/client/apps/docs/src/content/docs/developer-guide/developer-guide.md
@@ -5,43 +5,83 @@ description: "Guidance for contributors and developers working on the repo."
 
 ## Developer Guide
 
-This section covers code organization, conventions, and common workflows.
+This guide covers the core development workflows, project structure, and standards for the ProFileTailors monorepo.
+
+## Monorepo Structure
+
+ProFileTailors is organized as a full-stack monorepo, facilitating shared types and streamlined development across the entire system.
+
+```text
+├── client/
+│   ├── apps/
+│   │   ├── webapp/      # Vue.js 3 main application (SPA)
+│   │   ├── marketing/   # Astro-based landing page
+│   │   ├── blog/        # Astro-based blog
+│   │   └── docs/        # Starlight-based documentation site
+│   └── packages/
+│       ├── ui/          # Shared Shadcn-Vue components
+│       ├── utilities/   # Shared TypeScript utilities
+│       └── ...
+├── server/
+│   └── engine/          # Spring Boot 4.0 + Kotlin backend
+├── shared/              # Kotlin shared libraries
+├── infra/               # Infrastructure, Docker, monitoring, SSL
+└── .agents/             # AI agent configurations and workflow guides
+```
 
-## Branches and commits
+## Essential Workflows
 
-- Follow your team's branching strategy (Gitflow or similar).
-- Keep commits small, focused, and descriptive.
+We use a centralized `Makefile` to manage common tasks across both frontend and backend.
 
-## Relevant structure
+### Environment Setup
 
-- `server/engine` — domain logic and services.
-- `shared/` — shared libraries used across services and clients.
-- `client/packages` — frontend utilities and packages.
+Always start by preparing your local environment:
 
-## Adding a new package
+```bash
+make prepare-env
+make install
+make ssl-cert
+```
 
-1. Create a new module under `shared/` or `client/packages`.
-2. Define its `build.gradle.kts` (or package.json for JS packages).
-3. Update `settings.gradle.kts` or workspace config if necessary.
+### Development Servers
 
-## Running local tests (examples)
+- **Full stack:** `make dev` (Starts all frontend apps)
+- **Main Web App:** `make dev-web` (Vue SPA on port 9876)
+- **Backend:** `make backend-run` (Spring Boot + PostgreSQL + Keycloak)
+- **Documentation:** `make dev-docs` (Starlight on port 4321)
 
-- JVM tests (Gradle):
+### Quality & Verification
+
+Before opening a pull request, you **must** ensure the entire project passes verification:
 
 ```bash
-./gradlew :server:engine:test --tests "*CreateWorkspaceCommandHandlerTest"
+make verify-all
 ```
 
-- Frontend tests (Vitest):
+This command runs:
+- Frontend: `biome check`, `oxlint`, TypeScript type-checking, Vitest, and builds.
+- Backend: `detektAll`, JUnit 5 tests, and builds.
 
-```bash
-pnpm --filter client... test
-```
+## Coding Conventions
+
+### Frontend (Vue/TypeScript)
+- Use **Vue 3 Composition API** with `<script setup>`.
+- **Strict TypeScript**: No `any` types.
+- **Styling**: Tailwind CSS 4.
+- **Linting**: Biome and oxlint.
+
+### Backend (Kotlin/Spring Boot)
+- **Hexagonal Architecture**: Maintain strict separation between domain, application, and infrastructure layers.
+- **Reactive Stack**: Use WebFlux and R2DBC for non-blocking I/O.
+- **Style**: 4 spaces, no wildcard imports, KDoc for public APIs.
+
+For more detailed patterns and rules, refer to the guides in the `.agents/` directory, especially `.agents/AGENTS.md`.
 
-## Code quality
+## Testing Strategy
 
-- Review `detekt.yml` and run `./gradlew detektAll -x test` before sending PRs.
+- **Backend**: JUnit 5 + Kotest + MockK. Use Testcontainers for integration tests.
+- **Frontend**: Vitest for unit/component tests, Playwright for E2E tests.
 
 ---
 
-Add more sections (architecture, CI/CD, release process) as needed for your team.
+For architecture deep-dives, check the `.agents/skills/` directory which contains specialized guides for Hexagonal Architecture, Spring Boot best practices, and more.
diff --git a/client/apps/docs/src/content/docs/overview/introduction.md b/client/apps/docs/src/content/docs/overview/introduction.md
index ca6a249fc..49f577190 100644
--- a/client/apps/docs/src/content/docs/overview/introduction.md
+++ b/client/apps/docs/src/content/docs/overview/introduction.md
@@ -11,7 +11,7 @@ ProFileTailors is a production-grade platform for creating, customizing, and exp
 
 - **Full-featured résumé generator:** Interactive web forms, dynamic previews, and fast PDF export.
 - **Modern SPA frontend:** Built with Vue 3, TypeScript, and Tailwind CSS.
-- **Reactive, modular backend:** Kotlin + Spring Boot 3 with a clean, hexagonal architecture.
+- **Reactive, modular backend:** Kotlin 2.2 + Spring Boot 4.0 with a clean, hexagonal architecture.
 - **Security-first:** OAuth2 SSO via Keycloak and strict data privacy measures.
 
 ## Goal
diff --git a/client/apps/docs/src/content/docs/quick-start/quick-start.md b/client/apps/docs/src/content/docs/quick-start/quick-start.md
index f43bc036b..ae3b3f642 100644
--- a/client/apps/docs/src/content/docs/quick-start/quick-start.md
+++ b/client/apps/docs/src/content/docs/quick-start/quick-start.md
@@ -12,7 +12,7 @@ This guide provides the essential steps to get the ProFileTailors platform runni
 Before you begin, ensure you have the following installed:
 
 - **Java (JDK)**: Version 21 or higher
-- **Node.js**: Version 24.12 or higher
+- **Node.js**: Version 24.12.0 or higher
 - **pnpm**: Version 10 or higher
 - **Docker and Docker Compose**: For running backend services and dependencies
 - **Make**: To use the simplified commands in the `Makefile`