diff --git a/prisma/migrations/20260725090000_init/migration.sql b/prisma/migrations/20260725090000_init/migration.sql
new file mode 100644
index 0000000..8c92edb
--- /dev/null
+++ b/prisma/migrations/20260725090000_init/migration.sql
@@ -0,0 +1,132 @@
+-- CreateEnum
+CREATE TYPE "ProjectStatus" AS ENUM ('IDEA', 'OPEN', 'PLANNING', 'IN_DEVELOPMENT', 'DONE', 'ARCHIVED');
+
+-- CreateEnum
+CREATE TYPE "GitProvider" AS ENUM ('GITHUB', 'GITLAB', 'GITEA');
+
+-- CreateTable
+CREATE TABLE "GitConnection" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "provider" "GitProvider" NOT NULL,
+    "baseUrl" TEXT NOT NULL,
+    "username" TEXT,
+    "tokenCipher" TEXT,
+    "tokenHint" TEXT,
+    "lastCheckedAt" TIMESTAMP(3),
+    "lastCheckOk" BOOLEAN,
+    "lastCheckMessage" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "GitConnection_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Project" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "slug" TEXT NOT NULL,
+    "summary" TEXT,
+    "description" TEXT,
+    "status" "ProjectStatus" NOT NULL DEFAULT 'IDEA',
+    "priority" INTEGER NOT NULL DEFAULT 2,
+    "progress" INTEGER NOT NULL DEFAULT 0,
+    "accent" TEXT NOT NULL DEFAULT 'violet',
+    "tags" TEXT[] DEFAULT ARRAY[]::TEXT[],
+    "favorite" BOOLEAN NOT NULL DEFAULT false,
+    "repoUrl" TEXT,
+    "repoOwner" TEXT,
+    "repoName" TEXT,
+    "defaultBranch" TEXT,
+    "connectionId" TEXT,
+    "lastSyncedAt" TIMESTAMP(3),
+    "syncError" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Project_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Note" (
+    "id" TEXT NOT NULL,
+    "projectId" TEXT NOT NULL,
+    "title" TEXT,
+    "content" TEXT NOT NULL,
+    "pinned" BOOLEAN NOT NULL DEFAULT false,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Note_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "RepoSnapshot" (
+    "id" TEXT NOT NULL,
+    "projectId" TEXT NOT NULL,
+    "fullName" TEXT,
+    "description" TEXT,
+    "defaultBranch" TEXT,
+    "htmlUrl" TEXT,
+    "visibility" TEXT,
+    "stars" INTEGER NOT NULL DEFAULT 0,
+    "forks" INTEGER NOT NULL DEFAULT 0,
+    "openIssues" INTEGER NOT NULL DEFAULT 0,
+    "openPullRequests" INTEGER NOT NULL DEFAULT 0,
+    "sizeKb" INTEGER NOT NULL DEFAULT 0,
+    "lastCommitSha" TEXT,
+    "lastCommitMessage" TEXT,
+    "lastCommitAuthor" TEXT,
+    "lastCommitAt" TIMESTAMP(3),
+    "latestTag" TEXT,
+    "latestRelease" TEXT,
+    "latestReleaseAt" TIMESTAMP(3),
+    "branchCount" INTEGER NOT NULL DEFAULT 0,
+    "tagCount" INTEGER NOT NULL DEFAULT 0,
+    "branches" JSONB NOT NULL DEFAULT '[]',
+    "tags" JSONB NOT NULL DEFAULT '[]',
+    "commits" JSONB NOT NULL DEFAULT '[]',
+    "releases" JSONB NOT NULL DEFAULT '[]',
+    "languages" JSONB NOT NULL DEFAULT '{}',
+    "pushedAt" TIMESTAMP(3),
+    "fetchedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "RepoSnapshot_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "GitConnection_name_key" ON "GitConnection"("name");
+
+-- CreateIndex
+CREATE INDEX "GitConnection_provider_idx" ON "GitConnection"("provider");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Project_slug_key" ON "Project"("slug");
+
+-- CreateIndex
+CREATE INDEX "Project_status_idx" ON "Project"("status");
+
+-- CreateIndex
+CREATE INDEX "Project_connectionId_idx" ON "Project"("connectionId");
+
+-- CreateIndex
+CREATE INDEX "Project_updatedAt_idx" ON "Project"("updatedAt");
+
+-- CreateIndex
+CREATE INDEX "Note_projectId_idx" ON "Note"("projectId");
+
+-- CreateIndex
+CREATE INDEX "Note_pinned_idx" ON "Note"("pinned");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "RepoSnapshot_projectId_key" ON "RepoSnapshot"("projectId");
+
+-- AddForeignKey
+ALTER TABLE "Project" ADD CONSTRAINT "Project_connectionId_fkey" FOREIGN KEY ("connectionId") REFERENCES "GitConnection"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Note" ADD CONSTRAINT "Note_projectId_fkey" FOREIGN KEY ("projectId") REFERENCES "Project"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "RepoSnapshot" ADD CONSTRAINT "RepoSnapshot_projectId_fkey" FOREIGN KEY ("projectId") REFERENCES "Project"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/prisma/migrations/migration_lock.toml b/prisma/migrations/migration_lock.toml
new file mode 100644
index 0000000..044d57c
--- /dev/null
+++ b/prisma/migrations/migration_lock.toml
@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
new file mode 100644
index 0000000..0e2c50d
--- /dev/null
+++ b/prisma/schema.prisma
@@ -0,0 +1,163 @@
+// ─────────────────────────────────────────────────────────────
+//  Nebula – Datenmodell
+//  Datenbank: PostgreSQL (lokal oder via docker compose)
+// ─────────────────────────────────────────────────────────────
+
+generator client {
+  provider = "prisma-client-js"
+  // linux-musl-openssl-3.0.x wird fuer das Alpine-Docker-Image benoetigt.
+  binaryTargets = ["native", "linux-musl-openssl-3.0.x"]
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+/// Lebenszyklus eines Projekts. IDEA ist der Startzustand fuer
+/// frisch notierte Einfaelle, ARCHIVED blendet Projekte aus dem
+/// Standard-Board aus, ohne sie zu loeschen.
+enum ProjectStatus {
+  IDEA
+  OPEN
+  PLANNING
+  IN_DEVELOPMENT
+  DONE
+  ARCHIVED
+}
+
+/// Unterstuetzte Git-Systeme.
+enum GitProvider {
+  GITHUB
+  GITLAB
+  GITEA
+}
+
+/// Eine Verbindung zu einem Git-System inkl. verschluesseltem Token.
+model GitConnection {
+  id        String      @id @default(cuid())
+  name      String
+  provider  GitProvider
+  /// Basis-URL der Instanz, z. B. https://github.com, https://gitlab.com,
+  /// https://git.meine-domain.de
+  baseUrl   String
+  /// Optionaler Benutzername – rein informativ fuer die Anzeige.
+  username  String?
+
+  /// Personal Access Token, AES-256-GCM-verschluesselt (siehe src/lib/crypto.ts).
+  tokenCipher String?
+  /// Gekuerzte Darstellung des Tokens fuer die UI, z. B. "ghp_…4f2a".
+  tokenHint   String?
+
+  lastCheckedAt     DateTime?
+  lastCheckOk       Boolean?
+  lastCheckMessage  String?
+
+  projects  Project[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@unique([name])
+  @@index([provider])
+}
+
+/// Ein Vibe-Coding-Projekt – von der reinen Idee bis zum fertigen Repo.
+model Project {
+  id          String        @id @default(cuid())
+  name        String
+  slug        String        @unique
+  /// Einzeiler fuer die Karte im Dashboard.
+  summary     String?
+  /// Ausfuehrliche Beschreibung / Ideenskizze (Markdown-freundlich).
+  description String?
+  status      ProjectStatus @default(IDEA)
+  /// 1 = niedrig, 2 = normal, 3 = hoch, 4 = kritisch
+  priority    Int           @default(2)
+  /// Fortschritt in Prozent (0–100)
+  progress    Int           @default(0)
+  /// Akzentfarbe der Karte: violet | cyan | emerald | amber | rose | blue
+  accent      String        @default("violet")
+  tags        String[]      @default([])
+  favorite    Boolean       @default(false)
+
+  // ── Git-Anbindung ──────────────────────────────────────────
+  repoUrl       String?
+  /// Owner bzw. Namespace/Gruppe (bei GitLab auch verschachtelt: "gruppe/subgruppe")
+  repoOwner     String?
+  repoName      String?
+  defaultBranch String?
+  connectionId  String?
+  connection    GitConnection? @relation(fields: [connectionId], references: [id], onDelete: SetNull)
+
+  lastSyncedAt DateTime?
+  syncError    String?
+
+  notes    Note[]
+  snapshot RepoSnapshot?
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([status])
+  @@index([connectionId])
+  @@index([updatedAt])
+}
+
+/// Freie Notizen zu einem Projekt.
+model Note {
+  id        String   @id @default(cuid())
+  projectId String
+  project   Project  @relation(fields: [projectId], references: [id], onDelete: Cascade)
+  title     String?
+  content   String
+  pinned    Boolean  @default(false)
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([projectId])
+  @@index([pinned])
+}
+
+/// Zwischengespeicherter Stand des verknuepften Repositories. Wird beim
+/// Sync ueberschrieben, damit das Dashboard auch ohne Netz Daten zeigt.
+model RepoSnapshot {
+  id        String  @id @default(cuid())
+  projectId String  @unique
+  project   Project @relation(fields: [projectId], references: [id], onDelete: Cascade)
+
+  fullName      String?
+  description   String?
+  defaultBranch String?
+  htmlUrl       String?
+  visibility    String?
+
+  stars            Int @default(0)
+  forks            Int @default(0)
+  openIssues       Int @default(0)
+  openPullRequests Int @default(0)
+  sizeKb           Int @default(0)
+
+  lastCommitSha     String?
+  lastCommitMessage String?
+  lastCommitAuthor  String?
+  lastCommitAt      DateTime?
+
+  latestTag         String?
+  latestRelease     String?
+  latestReleaseAt   DateTime?
+
+  branchCount Int @default(0)
+  tagCount    Int @default(0)
+
+  /// Rohdaten der Listen – bewusst als JSON, damit providerspezifische
+  /// Zusatzfelder nicht verloren gehen.
+  branches  Json @default("[]")
+  tags      Json @default("[]")
+  commits   Json @default("[]")
+  releases  Json @default("[]")
+  languages Json @default("{}")
+
+  pushedAt  DateTime?
+  fetchedAt DateTime @default(now())
+}
diff --git a/prisma/seed.ts b/prisma/seed.ts
new file mode 100644
index 0000000..0ec60bd
--- /dev/null
+++ b/prisma/seed.ts
@@ -0,0 +1,118 @@
+import { PrismaClient, ProjectStatus } from "@prisma/client";
+
+const prisma = new PrismaClient();
+
+interface SampleNote {
+  title?: string | null;
+  content: string;
+  pinned?: boolean;
+}
+
+interface SampleProject {
+  name: string;
+  slug: string;
+  summary: string;
+  description: string;
+  status: ProjectStatus;
+  priority: number;
+  progress: number;
+  accent: string;
+  tags: string[];
+  favorite: boolean;
+  notes: SampleNote[];
+}
+
+/**
+ * Legt ein paar Beispielprojekte an, damit das Dashboard nach dem ersten
+ * Start nicht leer ist. Idempotent: bereits vorhandene Slugs werden
+ * uebersprungen.
+ */
+async function main() {
+  const samples: SampleProject[] = [
+    {
+      name: "Nebula",
+      slug: "nebula",
+      summary: "Dieses Dashboard – Uebersicht ueber alle Vibe-Coding Projekte.",
+      description:
+        "Meta: Nebula verwaltet sich selbst. Notizen, Status und Git-Infos an einem Ort.",
+      status: ProjectStatus.IN_DEVELOPMENT,
+      priority: 3,
+      progress: 65,
+      accent: "violet",
+      tags: ["next.js", "prisma", "dashboard"],
+      favorite: true,
+      notes: [
+        {
+          title: "Naechste Schritte",
+          content:
+            "- Kanban-Ansicht ergaenzen\n- Webhook-Endpoint fuer Push-Events\n- Export als Markdown",
+          pinned: true,
+        },
+      ],
+    },
+    {
+      name: "Synthwave CLI",
+      slug: "synthwave-cli",
+      summary: "Terminal-Tool, das Projektgeruest inkl. CI in Sekunden erzeugt.",
+      description:
+        "Idee: ein `npx synthwave init` das Repo, Lint, Tests, Container und Pipeline vorkonfiguriert.",
+      status: ProjectStatus.PLANNING,
+      priority: 2,
+      progress: 15,
+      accent: "cyan",
+      tags: ["cli", "typescript", "dx"],
+      favorite: false,
+      notes: [
+        {
+          title: null,
+          content: "Konkurrenz pruefen: create-t3-app, degit, plop.",
+          pinned: false,
+        },
+      ],
+    },
+    {
+      name: "Pixelgarten",
+      slug: "pixelgarten",
+      summary: "Browser-Spiel: ein Garten, der aus Commit-Aktivitaet waechst.",
+      description:
+        "Rohe Idee. Jeder Commit pflanzt eine Pflanze, Streaks lassen sie bluehen.",
+      status: ProjectStatus.IDEA,
+      priority: 1,
+      progress: 0,
+      accent: "emerald",
+      tags: ["spiel", "canvas", "fun"],
+      favorite: false,
+      notes: [],
+    },
+  ];
+
+  for (const sample of samples) {
+    const existing = await prisma.project.findUnique({
+      where: { slug: sample.slug },
+    });
+    if (existing) {
+      console.log(`  · uebersprungen (existiert): ${sample.slug}`);
+      continue;
+    }
+
+    const { notes, ...project } = sample;
+    await prisma.project.create({
+      data: {
+        ...project,
+        notes: notes.length ? { create: notes } : undefined,
+      },
+    });
+    console.log(`  ✓ angelegt: ${sample.slug}`);
+  }
+}
+
+main()
+  .then(async () => {
+    console.log("Seed abgeschlossen.");
+    await prisma.$disconnect();
+  })
+  .catch(async (error) => {
+    console.error("Seed fehlgeschlagen:", error);
+    await prisma.$disconnect();
+    process.exit(1);
+  });