## Project **Tessera** Tessera ist eine modulare, Docker-basierte Webplattform fuer interne Workflow-Automatisierung und Tool-Integration. Sie bietet ein Portal mit Seitenleiste, konfigurierbarem Dashboard und einem Marketplace fuer lizenzierbare Module. Perspektivisch soll Tessera auch an externe Kunden verkauft werden — Mandantenfaehigkeit ist von Anfang an eingeplant. **Core Value:** Eine zentrale Plattform, in der beliebige Workflow-Tools als Module lizenziert, aktiviert und genutzt werden koennen — ohne zwischen verschiedenen Anwendungen wechseln zu muessen. ### Constraints - **Infrastruktur**: Docker-basiert — alle Komponenten als Container - **Datenbank**: PostgreSQL oder MariaDB (Entscheidung durch Claude) - **Authentifizierung**: Initialer Admin-Account + manuelle Benutzerverwaltung + LDAP - **Versionierung**: Automatisierte Gitea-Integration (minimaler manueller Aufwand) - **Entwicklung**: Alles wird von Claude gebaut — Architektur muss wartbar und verstaendlich sein - **Mandantenfaehigkeit**: Von Anfang an in der Architektur verankert ## Technology Stack > The tables below show the **installed stack**, checked against `package.json`, > `pnpm-lock.yaml` (`importers:` resolved versions), and the Compose/Dockerfiles > on 2026-09-09. The original stack recommendation from 2026-06/07 lives unchanged > in `.planning/research/STACK.md`; regenerating this block from that file would > reintroduce the recommended-but-not-installed numbers below as if they were > current. ### Monorepo & Package Management | Technology | Installed Version | Purpose | |------------|--------------------|---------| | pnpm | 9.15.0 | Package manager — 60-80% disk reduction via content-addressable store, strict dependency isolation, workspace protocol for internal packages | | Turborepo | 2.9.18 | Build orchestration — incremental builds, parallel execution, task dependency graph, caching | ### Frontend | Technology | Installed Version | Purpose | |------------|--------------------|---------| | Next.js | 15.5.19 | Frontend framework — App Router, React Server Components. A newer major (16.2.x) was recommended but not adopted; see "Recommended But Not Adopted" below | | React | 19.2.7 | UI library | | TypeScript | 5.9.3 | Type safety | | Tailwind CSS | 4.3.1 | Styling — CSS-first config, OKLCH colors, built-in dark mode via `.dark` selector | | next-themes | 0.4.6 | Theme switching — dark/light mode with system preference detection | | next-intl | 4.13.0 | Internationalization | | react-grid-layout | 2.2.3 | Dashboard grid — drag & drop + resize, responsive breakpoints | | Zustand | 5.0.14 | Client state — UI state (sidebar toggle, theme, user prefs) | ### Backend | Technology | Installed Version | Purpose | |------------|--------------------|---------| | NestJS | 11.1.27 | API framework — modular architecture, dependency injection, guards, interceptors | | Express | 5.2.1 | HTTP server (via `@nestjs/platform-express`) | | Prisma | 6.19.3 | ORM. A newer major (7.8.x) was recommended but not adopted; see "Recommended But Not Adopted" below | | PostgreSQL | `postgres:16-alpine` | Database — Row-Level Security for multi-tenancy, JSONB for module config | ### Authentication & Authorization No identity provider is deployed. The installed system is a self-built login stack: | Technology | Installed Version | Purpose | |------------|--------------------|---------| | @nestjs/jwt | 11.0.2 | Issues and validates the session JWT | | passport + @nestjs/passport | 0.7.0 / 11.0.5 | Login and JWT authentication strategies (not module-to-module API-key auth — that was an earlier, since-corrected description of this package's purpose) | | argon2 | 0.44.0 | Password hashing | | ldapts | 8.1.8 | LDAP/AD directory binding for user sync | ### Desktop Wrapper | Technology | Installed Version | Purpose | |------------|--------------------|---------| | Tauri | 2.11.1 (CLI 2.11.3) | Desktop app wrapper. `apps/desktop` is scaffolding only as of `docs/anleitung-entwicklung.md` | ### Infrastructure & DevOps | Technology | Version | Purpose | |------------|---------|---------| | Node.js | `node:24-alpine` | JS runtime for both `apps/api` and `apps/web` production images (`apps/api/Dockerfile`, `apps/web/Dockerfile`) | | Docker | 29.8.0 (host property, measured on the dev machine, 2026-09-09) | Not pinned by this repository | | Docker Compose | v5.5.1 (host property, measured on the dev machine, 2026-09-09) | Not pinned by this repository | | Nginx Proxy Manager | external | Reverse proxy managed by host infrastructure — Tessera containers do not include a reverse proxy | | Gitea | existing | Version control, already in place | ### Testing | Technology | Installed Version | Purpose | |------------|--------------------|---------| | Vitest (apps/api) | 3.2.6 | Unit/integration tests | | Vitest (apps/web) | 4.1.9 | Unit/integration tests — a different major than apps/api, not yet aligned | | Testing Library (@testing-library/react) | 16.3.2 | Component tests | ### Developer Experience | Technology | Installed Version | Purpose | |------------|--------------------|---------| | Biome | 2.5.0 | Linting + formatting — replaces ESLint + Prettier | ## Recommended But Not Adopted The following was recommended in the original 2026-06/07 stack research (`.planning/research/STACK.md`) but is not part of the running system. Listed here, outside the tables above, so nothing in this section is mistaken for something that is actually built: - **Identity provider:** Keycloak 26.6.x plus `nest-keycloak-connect` were recommended for authentication and multi-tenant realm federation. Not built — no Keycloak service in any Compose file, no package in the lockfile. What runs instead is the self-built stack in the Authentication & Authorization table above. - **Cache / session store:** Redis 7.x was recommended. Not installed — no service, no package. - **Server state library:** TanStack Query 5.101.x was recommended. Not installed. - **Component library:** shadcn/ui CLI v4 was recommended. Not used — no `components.json`, no `components/ui` directory. - **E2E test runner:** Playwright 1.x was recommended as a project dependency. Not installed as one — browser checks run through the Playwright MCP tool, which is not a dependency of this repository and has no `playwright.config.*` here. - **Git hooks:** Husky 9.x and lint-staged 15.x were recommended. Not installed — no `.husky` directory. - **Next.js major version:** 16.2.x was recommended; the installed major is 15.5.19 (see Frontend table above). No statement here about whether an upgrade is planned. - **Prisma major version:** 7.8.x was recommended; the installed major is 6.19.3 (see Backend table above). No statement here about whether an upgrade is planned. ## Alternatives Considered The table below reflects the decision record from 2026-06, at the time the stack was chosen. Its "Recommended" column documents what was picked back then — it is not a statement about what is installed today; see the tables above for that. | Category | Recommended | Alternative | Why Not | |----------|-------------|-------------|---------| | Frontend Framework | Next.js 16 | Remix / SvelteKit | Next.js has best multi-tenant support, largest ecosystem, Vercel Platforms template as reference | | Backend Framework | NestJS 11 | Fastify standalone / Express | NestJS module system maps perfectly to Tessera modules. DI, guards, and interceptors reduce boilerplate | | ORM | Prisma 7 | Drizzle ORM | Prisma has gentler learning curve (built by Claude, non-programmer user), better migration safety. Drizzle is faster in serverless (irrelevant here — Docker deployment) | | Database | PostgreSQL 16 | MariaDB | PostgreSQL has native RLS for multi-tenancy, superior JSONB support, better extension ecosystem | | Auth | Keycloak | Custom JWT + LDAP lib | Building LDAP + multi-tenant auth from scratch is weeks of work and a security risk | | Desktop | Tauri 2 | Electron | 96% smaller, 5x less memory. Tessera desktop is a wrapper, not a full desktop app | | State | Zustand | Redux Toolkit | Zustand is 7x smaller bundle, no boilerplate, no providers. Redux is overkill for this project | | i18n | next-intl | react-i18next | next-intl is built for App Router, Server Component native, simpler API | | CSS | Tailwind 4 | CSS Modules / Styled Components | Utility-first is faster to develop, dark mode trivial, shadcn/ui requires it | | Package Manager | pnpm | npm / yarn | pnpm has strict isolation, better disk usage, workspace support built-in | | Monorepo Tool | Turborepo | Nx | Turborepo is simpler, aligns with Vercel ecosystem, sufficient for this project size | | Linting | Biome | ESLint + Prettier | Single tool, 100x faster, less config. ESLint is being replaced in NestJS 12 roadmap anyway | | Component Library | shadcn/ui | Material UI / Ant Design | shadcn gives ownership of components (no dep lock-in), built on Radix primitives, Tailwind-native | | Dashboard Grid | react-grid-layout | Gridstack.js | React-native, TypeScript rewrite in v2, hooks API, responsive breakpoints | | Reverse Proxy | Nginx Proxy Manager (external) | Traefik | NPM already in place on host — no proxy inside Tessera containers needed | ## Multi-Tenancy Strategy - Scales to thousands of tenants without catalog bloat - Single connection pool (no per-tenant connection overhead) - Prisma Client Extensions support RLS via session variables — in active use, see `apps/api/src/prisma/prisma-tenant.extension.ts` - Simpler migrations — one schema to manage - Cost-effective for the planned growth trajectory ## Installation # Initialize monorepo # Frontend (apps/web) # Backend (apps/api) # Desktop (apps/desktop) # Tauri CLI installed via cargo or npm # Shared (packages/shared) # Types, DTOs, and constants — no runtime deps # Dev tools (root) ## Docker Services (docker-compose.yml) ## Version Pinning Strategy - **Major versions:** Pin to major (e.g., `next@15`, `@nestjs/core@11`) - **Prisma:** Pin exactly — schema changes require matched versions (currently 6.19.3) - **Tailwind:** Follow latest within major — utility additions are non-breaking (currently 4.3.x) ## Sources Consulted for the original 2026-06/07 stack recommendation — sources for that decision, not evidence of the current installed state (see the tables above for that): - [Next.js 16 Docs](https://nextjs.org/docs/app/guides/upgrading/version-16) — Version 16.2.7+ stable - [NestJS Documentation](https://docs.nestjs.com/) — Version 11.1.x - [Prisma ORM 7 Announcement](https://www.prisma.io/blog/announcing-prisma-orm-7-0-0) — Pure TypeScript runtime - [Tauri 2.0 Stable Release](https://v2.tauri.app/blog/tauri-20/) — Cross-platform desktop - [Keycloak 26.6 Release](https://www.keycloak.org/2026/04/keycloak-2660-released) — Latest stable - [Turborepo](https://turborepo.dev/) — Version 2.9.x - [shadcn/ui CLI v4](https://ui.shadcn.com/docs/changelog/2026-03-cli-v4) — March 2026 update - [Tailwind CSS v4.3](https://tailwindcss.com/blog/tailwindcss-v4-3) — Latest features - [next-intl](https://next-intl.dev/) — Version 4.13.x - [react-grid-layout](https://github.com/react-grid-layout/react-grid-layout) — Version 2.2.x TypeScript rewrite - [PostgreSQL RLS Multi-Tenancy](https://aws.amazon.com/blogs/database/multi-tenant-data-isolation-with-postgresql-row-level-security/) - [pnpm Workspaces](https://pnpm.io/workspaces) — Workspace management ## Conventions Conventions not yet established. Will populate as patterns emerge during development. ## Architecture Architecture not yet mapped. Follow existing patterns found in the codebase. ## Project Skills No project skills found. Add skills to any of: `.claude/skills/`, `.agents/skills/`, `.cursor/skills/`, `.github/skills/`, or `.codex/skills/` with a `SKILL.md` index file. ## GSD Workflow Enforcement Before using Edit, Write, or other file-changing tools, start work through a GSD command so planning artifacts and execution context stay in sync. Use these entry points: - `/gsd-quick` for small fixes, doc updates, and ad-hoc tasks - `/gsd-debug` for investigation and bug fixing - `/gsd-execute-phase` for planned phase work Do not make direct repo edits outside a GSD workflow unless the user explicitly asks to bypass it. ## Developer Profile > Profile not yet configured. Run `/gsd-profile-user` to generate your developer profile. > This section is managed by `generate-claude-profile` -- do not edit manually.