diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..0fd6f54
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,10 @@
+APP_ENV=change-me
+DEV_MODE=change-me
+DEV_USER_ID=change-me
+
+DB_HOST=change-me
+DB_PORT=change-me
+DB_NAME=change-me
+DB_TEST_NAME=change-me
+DB_USER=change-me
+DB_PASS=change-me
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..af630e8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,36 @@
+# Env / Secrets
+.env
+.env.*
+!.env.example
+
+# Dependencies
+/vendor
+/node_modules
+/server/vendor
+
+# PHPUnit / cache / runtime
+/server/.phpunit.cache
+/server/storage
+/server/logs
+
+# Build artifacts / caches
+/web/**/public/cache
+/web/**/public/build
+/web/**/public/dist
+
+# Docker / DB data
+**/data
+**/db-data
+**/postgres-data
+*.sqlite
+*.db
+*.dump
+*.sql
+!/server/db/migrations/*.sql
+
+# IDE / OS
+.DS_Store
+Thumbs.db
+.idea
+.vscode
+*.swp
diff --git a/AGENTS.md b/AGENTS.md
index 04e6e38..392bf9c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,23 +1,17 @@
 # AGENTS (Repository Guidance)
 
-## Repository Intent
-- The `web/desktop` and `web/mobile` folders host the live HUD demo (Desktop and mobile). Keep everything that should be served from a webserver inside those folders.
-- `docs/game_rulebook.md` is the **Single Source of Truth (SSOT)** for Galaxy Forge’s game logic, builder system, resources, and requirements. Any UI work, game behavior, or rules must align with — not contradict — that document unless a new decision is logged.
-- `docs/` stores documentation while `planning/` holds sketches/notes that are not meant for deployment.
+## Projektregeln für Agents/Codex
+1. **SSOT:** `docs/game_rulebook*.md` ist maßgeblich. Änderungen müssen damit übereinstimmen.
+2. **Modularität:** Jedes Feature liegt in einem Modul (keine God-Classes, keine Mischzuständigkeiten).
+3. **Permissions:** Jede Admin-/Write-Aktion braucht eine Permission; **deny overrides** müssen funktionieren.
+4. **Keine Secrets:** Keine `.env`, keine echten Passwörter, keine API-Keys ins Repo.
+5. **Default-Credentials:** Nur Platzhalter wie `change-me`/`your-strong-password` verwenden und dokumentieren, dass vor Prod geändert werden muss.
+6. **Tests:** Tests müssen grün sein, bevor gemerged wird.
 
-## Key Instructions for Agents
-1. **Reference SSOT first.** When implementing features or answering questions related to game balance, resources, blueprints, buildings, or world generation, open `docs/game_rulebook.md` and confirm compliance. Note any missing detail needs a Decision Log entry (see section 13).
-2. **Respect folder intent.** Changes to web assets go in `web/desktop` or `web/mobile` only. Use `planning/` for drafts and `docs/` for textual explanations.
-3. **Document assumptions.** If you must deviate from `docs/game_rulebook.md`, append an entry to the Decision Log (section 13) explaining the why/when.
-4. **Keep mobile/desktop aligned.** When adjusting UI/partials, mirror updates in both `web/desktop` and `web/mobile` unless the change is explicitly mobile-only or desktop-only and documented.
-5. **Speak German.** All explanations, comments, and user-facing text from agents must be in German unless the user explicitly requests otherwise in another language.
-6. **Smoke tests mandatory.** After every change touching runtime code or assets, perform a smoke test (e.g., `php -S localhost:8000 -t web/desktop/public`) and note the outcome before wrapping up.
+## Ordner-Intent (Kurzfassung)
+- `web/desktop` und `web/mobile`: Alles, was aus dem Webserver ausgeliefert wird.
+- `docs/`: Dokumentation (SSOT liegt hier).
+- `planning/`: Skizzen/Notizen, nicht für Deployment.
 
-## When touching docs
-- Expand `docs/game_rulebook.md` if you update core rules, flow, or systems described there. Keep numbering/sections intact; append entries in the Decision Log (section 13) with dates.
-- The root `README.md` should mention where to find the SSOT and purpose of each folder.
-
-## Decision Log Reminder
-- Section 13 of `docs/game_rulebook.md` is the Decision Log. Add a dated entry whenever:
-  - You introduce a new rule variant or exception.
-  - The implementation deviates from the documented defaults.
+## Sprache
+- Alle Agenten-Ausgaben und Kommentare sind **Deutsch**, außer der User verlangt explizit eine andere Sprache.
diff --git a/README.md b/README.md
index 852d05d..39bda79 100644
--- a/README.md
+++ b/README.md
@@ -7,12 +7,38 @@ Alles, was später auf den Webserver gehört, lebt unter `web/`. Die anderen Ord
 - `web/desktop/`: Desktop-geeigneter Build mit eigenem `public/` (Entry-Point) und `src/partials/`.
 - `web/mobile/`: Mobile-Version (aktuell ein Spiegel des Desktop-Builds; anpassbar für responsive Varianten).
 - `docs/`: Projektdokumentation; siehe `docs/README.md` für Details zur Anwendung.
+- `docs/game_rulebook_v1_2.md`: **SSOT** für Regeln, Generator, Blueprints und Permissions.
 - `planning/`: Freifläche für Skizzen, Notizen oder Quelltext, der nicht ins Webroot gehört.
+- `server/`: Slim-Backend (PSR-4/7/15/11), API-Endpunkte und Tests.
+- `config/`: JSON-Konfigurationen (Planetklassen, Rassen, Gebäude-Blueprints).
 
 ## Entwicklung
-1. `cd /path/to/Space-Theme`
-2. `php -S localhost:8000 -t web/desktop/public`
-3. Öffne `http://localhost:8000/index.php?s=overview&p=dashboard` (für mobile Tests `-t web/mobile/public`).
+1. `cp .env.example .env`
+2. `docker compose up -d`
+3. `psql -h 127.0.0.1 -U <DB_USER> -c \"CREATE DATABASE <DB_TEST_NAME>\"` (nur einmalig)
+4. `cd server && composer install`
+5. `php db/migrate.php`
+6. `php db/seed.php`
+7. `vendor/bin/phpunit`
+8. `php -S localhost:8000 -t web/desktop/public`
+9. Öffne `http://localhost:8000/index.php?s=overview&p=dashboard` (für mobile Tests `-t web/mobile/public`).
+
+## Konfiguration (.env)
+Die Datei `.env.example` enthält **Platzhalter** (`change-me`). Diese Werte **müssen** vor einem Produktivbetrieb ersetzt werden.
+
+Benötigte Variablen:
+- `APP_ENV`
+- `DEV_MODE`
+- `DEV_USER_ID`
+- `DB_HOST`
+- `DB_PORT`
+- `DB_NAME`
+- `DB_TEST_NAME`
+- `DB_USER`
+- `DB_PASS`
+
+## Repo-Hygiene
+Vor dem Commit prüfen: **keine Secrets im Diff**.
 
 ## Weitere Infos
 - Die ausführliche Demo-Beschreibung und Abläufe stehen in `docs/README.md`.
diff --git a/config/blueprints_buildings.json b/config/blueprints_buildings.json
new file mode 100644
index 0000000..6af2a10
--- /dev/null
+++ b/config/blueprints_buildings.json
@@ -0,0 +1,83 @@
+{
+  "blueprints": [
+    {
+      "kind": "building",
+      "key": "build_center",
+      "name": "Bauzentrum",
+      "model": "stackable",
+      "tags": ["infrastructure"],
+      "capabilities": ["queue:build"],
+      "effects": [
+        {"type": "queue_slots_add", "amount": 1}
+      ],
+      "requirements": [],
+      "access": {
+        "allowed_races": [],
+        "blocked_races": []
+      },
+      "cost": {"metal": 200, "crystals": 100, "credits": 50},
+      "build_time": 60,
+      "properties": {"destroyable": true}
+    },
+    {
+      "kind": "building",
+      "key": "ore_mine",
+      "name": "Erzmine",
+      "model": "stackable",
+      "tags": ["industry"],
+      "capabilities": [],
+      "effects": [
+        {"type": "produce", "resource": "metal", "amount": 30},
+        {"type": "consume", "resource": "energy", "amount": 5}
+      ],
+      "requirements": [],
+      "access": {
+        "allowed_races": [],
+        "blocked_races": []
+      },
+      "cost": {"metal": 120, "crystals": 60},
+      "build_time": 90,
+      "properties": {"destroyable": true}
+    },
+    {
+      "kind": "building",
+      "key": "battery",
+      "name": "Batterie",
+      "model": "stackable",
+      "tags": ["energy"],
+      "capabilities": [],
+      "effects": [
+        {"type": "capacity_add", "resource": "energy", "amount": 200}
+      ],
+      "requirements": [],
+      "access": {
+        "allowed_races": [],
+        "blocked_races": []
+      },
+      "cost": {"metal": 80, "crystals": 40},
+      "build_time": 60,
+      "properties": {"destroyable": true}
+    },
+    {
+      "kind": "building",
+      "key": "storage",
+      "name": "Lager",
+      "model": "stackable",
+      "tags": ["storage"],
+      "capabilities": [],
+      "effects": [
+        {"type": "capacity_add", "resource": "metal", "amount": 500},
+        {"type": "capacity_add", "resource": "crystals", "amount": 300},
+        {"type": "capacity_add", "resource": "deuterium", "amount": 200}
+      ],
+      "requirements": [],
+      "access": {
+        "allowed_races": [],
+        "blocked_races": []
+      },
+      "cost": {"metal": 150, "crystals": 80},
+      "build_time": 90,
+      "properties": {"destroyable": true}
+    }
+  ]
+}
diff --git a/config/planet_classes.json b/config/planet_classes.json
new file mode 100644
index 0000000..fd62307
--- /dev/null
+++ b/config/planet_classes.json
@@ -0,0 +1,62 @@
+{
+  "resources": [
+    "metal",
+    "alloy",
+    "crystals",
+    "energy",
+    "credits",
+    "population",
+    "water",
+    "deuterium",
+    "food"
+  ],
+  "weights": {
+    "metal": 1.0,
+    "alloy": 2.5,
+    "crystals": 1.2,
+    "energy": 0.8,
+    "credits": 0.7,
+    "population": 0.5,
+    "water": 1.1,
+    "deuterium": 1.3,
+    "food": 0.9
+  },
+  "global_bounds": {
+    "min": -1.0,
+    "max": 1.0
+  },
+  "tiers": {
+    "normal": {
+      "target_score": 0.0,
+      "epsilon": 0.05
+    },
+    "rich": {
+      "target_score": 0.4,
+      "epsilon": 0.05
+    },
+    "legendary": {
+      "target_score": 1.0,
+      "epsilon": 0.05
+    }
+  },
+  "classes": {
+    "temperate": {
+      "spawn_weight": 1,
+      "constraints": {},
+      "bias": {},
+      "temperature_range_c": [5, 30]
+    },
+    "ice": {
+      "spawn_weight": 1,
+      "constraints": {
+        "water": { "min": 0.5 },
+        "energy": { "max": -0.6 }
+      },
+      "bias": {
+        "water": 0.1,
+        "energy": -0.1
+      },
+      "temperature_range_c": [-80, -10]
+    }
+  }
+}
diff --git a/config/races.json b/config/races.json
new file mode 100644
index 0000000..e082b6a
--- /dev/null
+++ b/config/races.json
@@ -0,0 +1,22 @@
+{
+  "races": {
+    "human": {
+      "name": "Mensch",
+      "modifiers": {
+        "produce": {
+          "credits": 0.02
+        },
+        "consume": {}
+      }
+    },
+    "robot": {
+      "name": "Roboter",
+      "modifiers": {
+        "produce": {
+          "metal": 0.05
+        },
+        "consume": {}
+      }
+    }
+  }
+}
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..b5c7158
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,14 @@
+services:
+  db:
+    image: postgres:16
+    container_name: galaxyforge-db
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_DB: galaxyforge
+      POSTGRES_USER: galaxyforge
+      POSTGRES_PASSWORD: galaxyforge
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+volumes:
+  pgdata:
diff --git a/docs/game_rulebook.md b/docs/game_rulebook.md
index 19fd7e8..4b2d895 100644
--- a/docs/game_rulebook.md
+++ b/docs/game_rulebook.md
@@ -1,4 +1,5 @@
-# Galaxy Forge — game_rulebook.md (SSOT) v1.0
+# Galaxy Forge — game_rulebook.md (ARCHIV)
+**Hinweis:** Maßgeblich als SSOT ist ab jetzt `docs/game_rulebook_v1_2.md`. Dieses Dokument bleibt nur als Archiv erhalten.
 *Single Source of Truth für Game-Logik, Baukasten-Systeme und Generator-Regeln*
 
 ---
@@ -187,6 +188,11 @@ Nach Anwenden der Klassen-Constraints werden die restlichen Modifier so ergänzt
 5) Rest-Modifier verteilen (unter Einhaltung globaler Bounds + Bias), bis Zielscore erreicht  
 6) Falls unmöglich: re-roll oder Tier wechseln (SSOT-Default: re-roll bis max N; dann Tier switch)
 
+### 6.5 Temperatur
+1) Planet hat Feld temperature (z.B. integer °C)
+2) Planetklasse kann temperature_range haben (min/max)
+3) Generator würfelt Temperatur deterministisch (Seed) innerhalb Range
+
 ---
 
 ## 7) Baukasten-System: Capabilities, Effects, Requirements, Access
diff --git a/docs/game_rulebook_v1_2.md b/docs/game_rulebook_v1_2.md
new file mode 100644
index 0000000..dce620e
--- /dev/null
+++ b/docs/game_rulebook_v1_2.md
@@ -0,0 +1,412 @@
+# Galaxy Forge — game_rulebook_v1_2.md (SSOT) v1.2
+*Single Source of Truth für Game-Logik, Baukasten-Systeme und Generator-Regeln*
+
+---
+
+## 0) Zweck & Arbeitsweise (SSOT)
+Dieses Dokument ist die **Single Source of Truth (SSOT)**.  
+**Codex/Entwicklung darf nichts implementieren, was dem widerspricht.**
+
+**Wenn etwas fehlt oder unklar ist:**
+1) **Default-Regeln** in diesem Dokument anwenden,  
+2) Entscheidung im **Decision Log** (am Ende) festhalten,  
+3) danach erst implementieren.
+
+---
+
+## 1) High-Level Vision
+Galaxy Forge ist ein persistentes Weltraum-Browsergame, dessen Inhalte **datengetrieben** sind:
+- Spieler (und später ggf. User-Designer) erstellen **Blueprints** (Gebäude, Schiffe, Forschung, Rassen, Spezialisierungen) über einen **Baukasten**.
+- Blueprints bestehen aus **Capabilities (Flags)**, **Effects (standardisierte Bausteine)**, **Requirements**, **Access Rules**.
+- Balance soll möglichst **automatisch** über ein **Punkte-/Budget-System** + **Auto-Cost** funktionieren, um Admin-Aufwand zu minimieren.
+
+---
+
+## 2) Kernbegriffe
+
+### 2.1 Blueprint (universell)
+Ein Blueprint ist ein datengetriebenes Objekt mit einheitlichem Schema:
+
+- `kind`: `building | ship | research | race | specialization | space_object` (erweiterbar)
+- `key`: eindeutiger String
+- `name`: Anzeigename
+- `tags`: freie Taxonomie-Strings
+- `capabilities`: freie Taxonomie-Strings (Flags)
+- `effects`: Liste standardisierter Effekt-Bausteine (kleine, feste Bibliothek)
+- `requirements`: Liste standardisierter Requirements (kleine, feste Bibliothek)
+- `access`: Whitelist/Blacklist nach Race/Specialization (und später ggf. weitere Dimensionen)
+- `balance`: Budget/Punkte/Auto-Cost (für usergenerierte Inhalte)
+
+**Wichtig:** Neue Tags/Capabilities/Blueprints müssen ohne Codeänderung möglich sein.  
+Neue **Effect-Typen** oder **Requirement-Typen** erfordern ggf. Code (Engine-Erweiterung) und sind bewusst klein zu halten.
+
+---
+
+## 3) Ressourcenmodell
+
+### 3.1 Ressourcenarten (SSOT)
+Galaxy Forge verwendet diese Ressourcen (erweiterbar, aber stabil halten):
+- `metal` (Metall)
+- `alloy` (Legierung)
+- `crystals` (Kristalle)
+- `energy` (Energie)
+- `credits` (Credits)
+- `population` (Einwohner)
+- `water` (Wasser)
+- `deuterium` (Deuterium)
+- `food` (Nahrungsgüter)
+
+
+**Einheiten & Lokalisierung:**
+- Interne Berechnung und Speicherung erfolgt **in SI-nahem Format** (z.B. Temperatur immer in **°C** als `temperature_c`).
+- UI darf je Sprache/Setting anzeigen:
+  - Fahrenheit: `F = C * 9/5 + 32`
+  - Celsius: unverändert
+- Umrechnung ist reine Anzeige und hat keinen Einfluss auf Serverlogik.
+### 3.2 Zeitbasierte Simulation (serverseitig, authoritative)
+Der Server speichert pro Planet:
+- aktuelle Mengen pro Ressource
+- `last_resource_update_at`
+
+Beim Lesen oder bei Aktionen (Bauen, Abholen, Missionen etc.) muss der Server Ressourcen **nachziehen**:
+
+1) `dt = now - last_resource_update_at`  
+2) `net_rates_per_hour = calc_net_rates(planet)` (Produktion − Verbrauch, inkl. Drossel)  
+3) `amount += net_rates * dt/3600`  
+4) optional: clamping auf `0..cap` (siehe 3.3)  
+5) `last_resource_update_at = now`
+
+### 3.3 Caps (Speicherlimits)
+Caps sind optional pro Ressource und entstehen über Effects (z.B. `capacity_add`).  
+Wenn Cap für eine Ressource nicht definiert ist, gilt `cap = infinity` (Default).  
+Caps dürfen auch für `energy` existieren (Batterien).
+
+---
+
+## 4) Multiplikatoren-System (Planet + Race + Spec + Research + …)
+
+### 4.1 Grundsatz
+Blueprints definieren **Grundwerte** (z.B. Mine produziert 50/h).  
+Der tatsächliche Effekt entsteht durch eine **Multiplikator-Kette**.
+
+Für eine Ressource `r` gilt:
+
+`effective_value(r) = base_value(r) × Π (1 + bonus_i(r))`
+
+- +10% = `+0.10`, −15% = `−0.15`
+- Multiplikation ist Absicht (Synergien, komplexeres Wirtschaften)
+
+### 4.2 Quellen der Boni (Standard-Kette)
+Boni werden gesammelt (Reihenfolge nur für Debug/Anzeige):
+1) Planet (konkrete Planet-Modifier)
+2) Race (Rassenmodifier)
+3) Specialization (Spezialisierungsmodifier)
+4) Research (Forschungsmodifier)
+5) optional später: Events, Artefakte, Offiziere, Allianzboni …
+
+### 4.3 Separate Behandlung von Produktion & Verbrauch
+- Produktion (`produce`, `convert outputs`) und Verbrauch (`consume`, `convert inputs`) können getrennte Boni haben.
+- Default: Wenn kein spezieller Bonus existiert, wirkt ein Bonus nur auf das passende Feld (prod vs consume).
+
+### 4.4 Debug-Breakdown (Pflicht für UI)
+Die UI soll optional einen Breakdown anzeigen:
+- Base
+- Planet
+- Race
+- Spec
+- Research
+- Result
+
+Das ist essenziell für Transparenz & Balancing.
+
+---
+
+## 5) Weltmodell & Space Objects
+
+### 5.1 Koordinaten
+Koordinaten sind `galaxy:system:position` (G:S:P).
+
+### 5.2 Space Objects (Mehrfachobjekte pro Koordinate)
+An einer Koordinate können mehrere Space Objects existieren:
+- planet
+- wormhole
+- blackhole
+- station
+- anomaly
+- mission_marker
+- debris_field
+- beacon
+- … (erweiterbar)
+
+Ein Planet ist ein Space Object vom Typ `planet`.
+
+### 5.3 Targeting für Flotten/Missionen
+Ein Ziel kann sein:
+- `target_object_id` (bevorzugt) oder
+- `(coords + target_type)`
+
+Dadurch kann die UI z.B. „anfliegen: Planet / Wurmloch / Station“ auswählen.
+
+---
+
+## 6) Planetklassen & Universum-Generator (Constraints + Budget)
+
+### 6.1 Planetklasse ist „Vorgabe-Regelwerk“
+Planetklassen (ice/desert/rock/…) geben dem Generator:
+- **Constraints (MUSS):** harte Min/Max-Bedingungen für bestimmte Resource-Modifier
+- **Bias (SOLL):** Verteilungspräferenzen, welche Ressourcen eher hoch/runter gehen
+
+Beispiel (Ice):
+- water immer >= +50%
+- energy immer <= −60%
+
+### 6.2 Planet-Modifier werden pro Planet gezogen und sind stabil
+
+### 6.2a Temperatur (einfach, performant)
+Jeder Planet hat eine **Temperatur als Einzelwert in °C**:
+
+- DB/State-Feld: `temperature_c` (integer, z.B. `-40` bis `+80`)
+- Planetklasse kann optional `temperature_range_c: [min, max]` definieren.
+- Der Universum-Generator würfelt die Temperatur **deterministisch** (Seed) innerhalb des Ranges und **speichert** sie am Planeten.
+- Wenn kein `temperature_range_c` definiert ist, gilt **Default**: `temperature_c = 0` (°C).
+
+**Wichtig (v1):** Es gibt **keine Tag/Nacht-Simulation** und keine zeitabhängigen Temperaturkurven.
+Temperatur ist in v1 primär:
+- Anzeige/Flavor (UI)
+- späterer Input für Terraformer/Planet-Anpassung
+
+Damit bleibt die rückwirkende Ressourcenberechnung (z.B. 15 Tage) trivial performant.
+
+**Terraformer (später):**
+- darf `temperature_c` verändern (mit Kosten/Constraints),
+- ohne dass der Ressourcen-Tick komplizierter wird, solange Temperatur nicht aktiv in Produktionsformeln genutzt wird.
+Jeder Planet hat:
+- `planet_class_key`
+- `planet_seed`
+- **konkrete** Modifier-Werte pro Ressource (werden gespeichert)
+
+Warum speichern?
+- Balancing-Änderungen sollen nicht rückwirkend alte Planeten verändern.
+
+### 6.3 Budget-/Score-System für Vergleichbarkeit
+Planeten sollen trotz Spezialisierung **vergleichbar** sein.
+
+Definiere:
+- Gewichte `W[r]` pro Ressource (Wertigkeit)
+- Modifier `m[r]` pro Ressource (z.B. +2.0 = +200%, −1.0 = −100%)
+- Planet-Score `S = Σ(W[r] × m[r])`
+
+Jeder Planet gehört zu einem Tier mit `target_score`:
+- normal: `S ≈ 0`
+- rich: `S ≈ +0.4`
+- legendary: `S ≈ +1.0`
+(Spawnwahrscheinlichkeiten per weight)
+
+**Generator-Regel:**  
+Nach Anwenden der Klassen-Constraints werden die restlichen Modifier so ergänzt/justiert, dass `S` im Zielbereich liegt (epsilon).
+
+### 6.4 Ablauf Planetgenerierung (deterministisch)
+1) planet_class anhand spawn_weight wählen  
+2) alle `m[r] = 0` initialisieren  
+3) Constraints anwenden (min/max + ggf. random within range)  
+4) aktuellen Score S berechnen  
+5) Rest-Modifier verteilen (unter Einhaltung globaler Bounds + Bias), bis Zielscore erreicht  
+6) Falls unmöglich: re-roll oder Tier wechseln (SSOT-Default: re-roll bis max N; dann Tier switch)
+
+---
+
+## 7) Baukasten-System: Capabilities, Effects, Requirements, Access
+
+### 7.1 Capabilities (Flags) — frei erweiterbar (Formular-Add)
+Capabilities sind freie Strings, z.B.:
+- `menu:research`
+- `menu:bank`
+- `menu:spy`
+- `menu:black_market`
+- `menu:lottery`
+- `shipyard:small|medium|large|mega`
+- `defense:orbital`
+- `terraforming`
+- `ground:cloning`
+- `stargate`
+
+**Regel (Feature Unlock):**  
+Ein Menüpunkt/Feature ist verfügbar, wenn der Spieler **mindestens einen Besitz/State** hat, der die Capability liefert:
+- meist: mindestens ein Gebäude mit `capabilities` enthält `menu:xyz`
+- alternativ: Forschung kann Capability gewähren (`grant_capability`)
+
+### 7.2 Effects (kleine, feste Bibliothek)
+Der Baukasten erlaubt nur diese Effect-Typen (v1):
+1) `produce` — +X pro Stunde Ressource  
+2) `consume` — −X pro Stunde Ressource  
+3) `convert` — Inputs/h → Outputs/h (z.B. 20 metal + 5 energy → 5 alloy)  
+4) `capacity_add` — Cap +X für Ressource (z.B. Lager, Batterie)  
+5) `queue_slots_add` — zusätzliche Bau-/Queue-Slots (z.B. Bauzentrum)  
+6) `points_add` — +X pro Stunde für Punkt-Ressourcen (z.B. research_points, spy_points)  
+7) `modifier_add` — Additiver Bonus (z.B. +0.02 metal prod) auf Ziel (by_resource/by_tag/by_key)  
+8) `grant_capability` — schaltet Capability frei (v.a. Forschung)
+
+**Hinweis:** Neue Effect-Typen sind möglich, aber erfordern Code-Erweiterung und SSOT-Update.
+
+### 7.3 Requirements (kleine, feste Bibliothek)
+Der Baukasten erlaubt diese Requirements (v1):
+- `building_count` (min count eines bestimmten Gebäudes)
+- `building_tag_count` (min count aller Gebäude mit Tag)
+- `research_level` (min Level einer Forschung)
+- `has_capability` (z.B. `menu:research` muss vorhanden sein)
+- `player_race_in` / `player_race_not_in`
+- `player_spec_in` / `player_spec_not_in`
+
+### 7.4 Access Rules (Whitelist/Blacklist) — überall gleich
+Zusätzlich oder alternativ zu Requirements können Blueprints `access` definieren:
+
+- `allowed_races`, `blocked_races`
+- `allowed_specializations`, `blocked_specializations`
+
+**Regeln:**
+- Wenn `allowed_*` nicht leer → muss enthalten sein.
+- Wenn in `blocked_*` enthalten → verboten.
+
+Beispiel: Roboter dürfen keine Klonfabrik, aber dürfen Robotik-Werkstatt:
+- clone_factory: blocked_races=["robot"]
+- robot_workshop: allowed_races=["robot"]
+
+---
+
+## 8) Gebäude (Buildings) — stackable/levelable und Bauzentren-Queues
+
+### 8.1 Gebäude-Modelle
+Gebäude unterstützen mindestens:
+- `stackable`: man baut N Instanzen (Count)
+- `levelable`: ein Gebäude hat Level L (Upgrade)
+(hybrid ist optional später)
+
+### 8.2 Paralleles Bauen über Bauzentren
+Es gibt ein Gebäude (Blueprint) mit Capability/Effect, das **Queue-Slots** liefert.
+Standard: `build_center` ist stackable und hat Effect `queue_slots_add: +1 je count`.
+
+**Regel:**  
+`queue_slots = base_slots + Σ(queue_slots_add effects)`  
+SSOT-Default: `base_slots = 0` und mindestens 1 Bauzentrum im Startpaket.
+
+### 8.3 Bauauftrag (Build Job)
+Ein Bauauftrag enthält:
+- planet_id
+- building_key
+- mode:
+  - stackable: delta_count
+  - levelable: target_level
+- started_at, finish_at
+- slot_index (0..queue_slots-1)
+
+### 8.4 Start eines Bauauftrags
+1) update_resources(planet)  
+2) freie Slots prüfen (active_jobs < queue_slots)  
+3) Requirements + Access prüfen  
+4) Auto-Cost berechnen (oder config cost)  
+5) Ressourcen sofort abziehen  
+6) Job anlegen (finish_at)
+
+### 8.5 Abschluss
+Wenn `now >= finish_at`:
+- stackable: count += delta_count  
+- levelable: level = target_level  
+- Job entfernen  
+- optional: Report/Event
+
+---
+
+## 9) Zerstörbarkeit & Bombardierung (Gebäude können zerstört werden)
+
+### 9.1 Gebäude-Property: destroyable
+Gebäude können `properties.destroyable` haben:
+- Default: `true`
+- Wenn `false`, darf Bombardierung dieses Gebäude nicht reduzieren.
+
+Optional:
+- `structure` (Robustheit)
+- `bombard_priority` (Zielgewicht)
+- `debris_yield` (Ressourcenanteil der Kosten als Trümmer)
+
+### 9.2 Minimalregel (v1)
+Bombardierung reduziert direkt:
+- stackable: count sinkt
+- levelable: level sinkt
+Kein separater Damage-State im v1.
+
+---
+
+## 10) Balance für usergenerierte Inhalte: Punkte + Auto-Cost (Anti-Exploit)
+
+### 10.1 Ziel
+User sollen Inhalte bauen können, ohne das Spiel zu brechen.
+Admin soll nicht jedes Ding manuell balancen müssen.
+
+### 10.2 Grundregel (Anti-Exploit)
+**User wählen Effekte, nicht frei Kosten/Zeit.**  
+Kosten/Zeit/Upkeep werden **automatisch** aus Effekten abgeleitet (Auto-Cost).
+
+Optional gibt es einen Tradeoff-Slider (z.B. „billiger vs schneller“), aber nur in engem Korridor:
+- Default: max ±2 Budgetpunkte oder max ±20% Abweichung.
+
+Damit ist „0 Kosten + lange Zeit“ nicht ausnutzbar, weil Kosten nicht frei sind.
+
+### 10.3 Budget pro Blueprint-Kategorie
+Jede Kategorie hat ein Budget (Startwerte v1, später balancen):
+- building: z.B. 15
+- ship: z.B. 20
+- research: z.B. 12
+- race: z.B. 0 (Summe Traits muss nahe 0)
+- specialization: z.B. 0 (nahe 0)
+
+### 10.4 Scoring (Power Score)
+Jeder Effect trägt Punkte bei, abhängig von:
+- Ressource (über Werttabelle)
+- Art des Effekts (produce/convert/stats/modifier)
+- Inputs (consume) reduzieren Score
+- Constraints/Exklusivität kann Score reduzieren (z.B. „nur race robot“ erlaubt -> leichter Preisabschlag möglich)
+
+**Werttabelle (v1, grob):**
+- metal: 1.0
+- crystals: 1.2
+- deuterium: 1.3
+- water: 1.1
+- food: 0.9
+- energy: 0.8
+- alloy: 2.5
+- credits: 0.7
+(population/points separat)
+
+Die konkrete Score-Formel ist ein Implementierungsdetail, muss aber:
+- deterministisch
+- transparent (UI zeigt Score)
+- nicht trivialisierbar
+
+### 10.5 Auto-Cost Ableitung (Grundsatz)
+`cost` und `build_time` steigen monoton mit Score.
+Optional zusätzlich: `upkeep` (consume) als natürliche Bremse, statt Hardcaps.
+
+---
+
+## 11) Start-Defaults (v1)
+- Universe: 9 Galaxien, 499 Systeme, 15 Positionen (anpassbar per config)
+- Start: 1 Planet pro Spieler
+- Start: 1 Bauzentrum (damit mindestens 1 Queue-Slot existiert)
+- Planetklasse: temperate (oder nach Race preference), aber Generatorregel gilt
+- Gebäudeanzahl: keine Hardcaps (Balance über Kosten/Zeit/Upkeep)
+
+---
+
+## 12) Konfig-Dateien (Empfehlung)
+- `config/universe.json` (Seeds, Dimensionen, Tier-Weights)
+- `config/resources.json` (Werttabelle, caps defaults)
+- `config/planet_classes.json` (spawn_weight, constraints, bias)
+- `config/blueprints/*.json` (Gebäude, Schiffe, Forschung, Rassen, Specs)
+- `config/taxonomy_capabilities.json` (optional UI-Hilfe/Labels)
+
+---
+
+## 13) Decision Log
+- [2026-02-03] v1.0 erstellt: Baukasten-Blueprint-System + Planet-Generator (Constraints+Budget) + Build-Center-Queues + destroyable Flag + Auto-Cost Prinzip.
+- [2026-02-03] v1.2 ergänzt: Planet-Temperatur als gespeicherter °C-Einzelwert, keine Tag/Nacht-Simulation; UI-Lokalisierung (°C/°F Anzeige).
+- [2026-02-03] Default festgelegt: Ohne `temperature_range_c` gilt `temperature_c = 0` (°C).
diff --git a/server/composer.json b/server/composer.json
new file mode 100644
index 0000000..c6263d0
--- /dev/null
+++ b/server/composer.json
@@ -0,0 +1,27 @@
+{
+  "name": "galaxy-forge/server",
+  "type": "project",
+  "require": {
+    "php": ">=8.2",
+    "slim/slim": "^4.12",
+    "slim/psr7": "^1.6",
+    "php-di/php-di": "^7.0",
+    "vlucas/phpdotenv": "^5.6"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^10.5"
+  },
+  "autoload": {
+    "psr-4": {
+      "App\\": "src/"
+    }
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "App\\Tests\\": "tests/"
+    }
+  },
+  "scripts": {
+    "test": "phpunit"
+  }
+}
diff --git a/server/db/migrate.php b/server/db/migrate.php
new file mode 100644
index 0000000..42516f7
--- /dev/null
+++ b/server/db/migrate.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Database\ConnectionFactory;
+use Dotenv\Dotenv;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$repoRoot = dirname(__DIR__, 2);
+if (file_exists($repoRoot . '/.env')) {
+    $dotenv = Dotenv::createImmutable($repoRoot);
+    $dotenv->safeLoad();
+}
+
+$pdo = ConnectionFactory::create();
+
+$migrationsDir = __DIR__ . '/migrations';
+$files = glob($migrationsDir . '/*.sql');
+sort($files);
+
+foreach ($files as $file) {
+    $sql = file_get_contents($file);
+    if ($sql === false) {
+        throw new RuntimeException("Migration nicht lesbar: {$file}");
+    }
+    $pdo->exec($sql);
+    echo "OK: " . basename($file) . PHP_EOL;
+}
diff --git a/server/db/migrations/001_init.sql b/server/db/migrations/001_init.sql
new file mode 100644
index 0000000..84c4fab
--- /dev/null
+++ b/server/db/migrations/001_init.sql
@@ -0,0 +1,72 @@
+CREATE TABLE IF NOT EXISTS users (
+    id SERIAL PRIMARY KEY,
+    username TEXT NOT NULL UNIQUE,
+    race_key TEXT NOT NULL DEFAULT 'human',
+    created_at TIMESTAMP NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS planets (
+    id SERIAL PRIMARY KEY,
+    user_id INT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    name TEXT NOT NULL,
+    class_key TEXT NOT NULL,
+    planet_seed INT NOT NULL DEFAULT 0,
+    temperature_c INT NOT NULL DEFAULT 0,
+    modifiers TEXT NOT NULL,
+    resources TEXT NOT NULL,
+    last_resource_update_at TIMESTAMP NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS planet_buildings (
+    id SERIAL PRIMARY KEY,
+    planet_id INT NOT NULL REFERENCES planets(id) ON DELETE CASCADE,
+    building_key TEXT NOT NULL,
+    count INT NOT NULL DEFAULT 0,
+    level INT NOT NULL DEFAULT 0,
+    UNIQUE (planet_id, building_key)
+);
+
+CREATE TABLE IF NOT EXISTS build_jobs (
+    id SERIAL PRIMARY KEY,
+    planet_id INT NOT NULL REFERENCES planets(id) ON DELETE CASCADE,
+    building_key TEXT NOT NULL,
+    mode TEXT NOT NULL,
+    delta_count INT,
+    target_level INT,
+    started_at TIMESTAMP NOT NULL,
+    finish_at TIMESTAMP NOT NULL,
+    slot_index INT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS roles (
+    id SERIAL PRIMARY KEY,
+    key TEXT NOT NULL UNIQUE,
+    name TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS permissions (
+    id SERIAL PRIMARY KEY,
+    key TEXT NOT NULL UNIQUE,
+    module TEXT NOT NULL,
+    description TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS role_permissions (
+    role_id INT NOT NULL REFERENCES roles(id) ON DELETE CASCADE,
+    permission_id INT NOT NULL REFERENCES permissions(id) ON DELETE CASCADE,
+    PRIMARY KEY (role_id, permission_id)
+);
+
+CREATE TABLE IF NOT EXISTS user_roles (
+    user_id INT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    role_id INT NOT NULL REFERENCES roles(id) ON DELETE CASCADE,
+    PRIMARY KEY (user_id, role_id)
+);
+
+CREATE TABLE IF NOT EXISTS user_permission_overrides (
+    user_id INT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    permission_id INT NOT NULL REFERENCES permissions(id) ON DELETE CASCADE,
+    effect TEXT NOT NULL CHECK (effect IN ('allow', 'deny')),
+    PRIMARY KEY (user_id, permission_id)
+);
diff --git a/server/db/seed.php b/server/db/seed.php
new file mode 100644
index 0000000..0cb2d19
--- /dev/null
+++ b/server/db/seed.php
@@ -0,0 +1,109 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Config\ConfigLoader;
+use App\Config\ConfigValidator;
+use App\Database\ConnectionFactory;
+use App\Module\Permissions\Permissions;
+use App\Module\PlanetGenerator\Service\PlanetGenerator;
+use Dotenv\Dotenv;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$repoRoot = dirname(__DIR__, 2);
+if (file_exists($repoRoot . '/.env')) {
+    $dotenv = Dotenv::createImmutable($repoRoot);
+    $dotenv->safeLoad();
+}
+
+$pdo = ConnectionFactory::create();
+$pdo->beginTransaction();
+
+try {
+    $stmt = $pdo->prepare("INSERT INTO roles (key, name) VALUES (:key, :name) ON CONFLICT (key) DO NOTHING");
+    $stmt->execute(['key' => 'player', 'name' => 'Spieler']);
+    $stmt->execute(['key' => 'admin', 'name' => 'Admin']);
+
+    $permStmt = $pdo->prepare(
+        'INSERT INTO permissions (key, module, description) VALUES (:key, :module, :description)
+         ON CONFLICT (key) DO NOTHING'
+    );
+    foreach (Permissions::definitions() as $perm) {
+        $permStmt->execute($perm);
+    }
+
+    $pdo->exec("INSERT INTO role_permissions (role_id, permission_id)
+        SELECT r.id, p.id
+        FROM roles r
+        JOIN permissions p ON p.key = 'planet.public.view'
+        WHERE r.key = 'player'
+        ON CONFLICT DO NOTHING");
+
+    $pdo->exec("INSERT INTO role_permissions (role_id, permission_id)
+        SELECT r.id, p.id
+        FROM roles r
+        JOIN permissions p ON p.key = 'planet.admin.generate'
+        WHERE r.key = 'admin'
+        ON CONFLICT DO NOTHING");
+
+    $stmt = $pdo->prepare("INSERT INTO users (username, race_key) VALUES (:username, :race_key) ON CONFLICT (username) DO NOTHING");
+    $stmt->execute(['username' => 'dev', 'race_key' => 'human']);
+
+    $userId = (int)$pdo->query("SELECT id FROM users WHERE username = 'dev'")->fetchColumn();
+
+    $pdo->exec("INSERT INTO user_roles (user_id, role_id)
+        SELECT {$userId}, r.id
+        FROM roles r
+        WHERE r.key = 'player'
+        ON CONFLICT DO NOTHING");
+
+    $planetExists = $pdo->prepare('SELECT id FROM planets WHERE user_id = :user_id LIMIT 1');
+    $planetExists->execute(['user_id' => $userId]);
+    $planetId = $planetExists->fetchColumn();
+
+    if (!$planetId) {
+        $configLoader = new ConfigLoader(new ConfigValidator(), $repoRoot . '/config');
+        $generator = new PlanetGenerator($configLoader);
+        $generated = $generator->generate('temperate', 'normal', 42);
+
+        $resources = [];
+        foreach ($configLoader->planetClasses()['resources'] as $res) {
+            $resources[$res] = 500.0;
+        }
+
+        $stmt = $pdo->prepare(
+            'INSERT INTO planets (user_id, name, class_key, planet_seed, temperature_c, modifiers, resources, last_resource_update_at)
+             VALUES (:user_id, :name, :class_key, :planet_seed, :temperature_c, :modifiers, :resources, :last_update)
+             RETURNING id'
+        );
+        $stmt->execute([
+            'user_id' => $userId,
+            'name' => 'Earth Prime',
+            'class_key' => $generated['class_key'],
+            'planet_seed' => 42,
+            'temperature_c' => (int)$generated['temperature_c'],
+            'modifiers' => json_encode($generated['modifiers'], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+            'resources' => json_encode($resources, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+            'last_update' => (new DateTimeImmutable('now'))->format('Y-m-d H:i:s'),
+        ]);
+        $planetId = (int)$stmt->fetchColumn();
+
+        $stmt = $pdo->prepare(
+            'INSERT INTO planet_buildings (planet_id, building_key, count, level)
+             VALUES (:planet_id, :building_key, :count, 0)
+             ON CONFLICT (planet_id, building_key) DO NOTHING'
+        );
+        $stmt->execute([
+            'planet_id' => $planetId,
+            'building_key' => 'build_center',
+            'count' => 1,
+        ]);
+    }
+
+    $pdo->commit();
+    echo "Seed abgeschlossen.\n";
+} catch (Throwable $e) {
+    $pdo->rollBack();
+    throw $e;
+}
diff --git a/server/phpunit.xml b/server/phpunit.xml
new file mode 100644
index 0000000..24a5df8
--- /dev/null
+++ b/server/phpunit.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit
+  bootstrap="tests/bootstrap.php"
+  colors="true"
+  cacheDirectory=".phpunit.cache"
+>
+  <testsuites>
+    <testsuite name="GalaxyForge">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>
diff --git a/server/public/index.php b/server/public/index.php
new file mode 100644
index 0000000..477c4ed
--- /dev/null
+++ b/server/public/index.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Bootstrap;
+use Dotenv\Dotenv;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$repoRoot = dirname(__DIR__, 1);
+$repoRoot = dirname($repoRoot, 1);
+if (file_exists($repoRoot . '/.env')) {
+    $dotenv = Dotenv::createImmutable($repoRoot);
+    $dotenv->safeLoad();
+}
+
+$container = Bootstrap::buildContainer();
+$app = Bootstrap::createApp($container);
+$app->run();
diff --git a/server/src/Bootstrap.php b/server/src/Bootstrap.php
new file mode 100644
index 0000000..6c43c60
--- /dev/null
+++ b/server/src/Bootstrap.php
@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App;
+
+use App\Config\ConfigLoader;
+use App\Config\ConfigValidator;
+use App\Database\ConnectionFactory;
+use App\Module\Auth\Middleware\AuthContextMiddleware;
+use App\Module\Auth\Service\AuthService;
+use App\Module\BuildQueue\Routes as BuildQueueRoutes;
+use App\Module\Economy\Routes as EconomyRoutes;
+use App\Module\PlanetGenerator\Routes as PlanetGeneratorRoutes;
+use App\Shared\Clock\SystemTimeProvider;
+use App\Shared\Clock\TimeProvider;
+use DI\ContainerBuilder;
+use Psr\Container\ContainerInterface;
+use Slim\App;
+use Slim\Factory\AppFactory;
+use Slim\Interfaces\RouteCollectorProxyInterface;
+
+final class Bootstrap
+{
+    public static function buildContainer(array $overrides = []): ContainerInterface
+    {
+        $builder = new ContainerBuilder();
+        $builder->addDefinitions([
+            \PDO::class => function () {
+                return ConnectionFactory::create();
+            },
+            TimeProvider::class => function () {
+                return new SystemTimeProvider();
+            },
+            ConfigValidator::class => function () {
+                return new ConfigValidator();
+            },
+            ConfigLoader::class => function (ConfigValidator $validator) {
+                return new ConfigLoader($validator);
+            },
+        ]);
+
+        if ($overrides) {
+            $builder->addDefinitions($overrides);
+        }
+
+        return $builder->build();
+    }
+
+    public static function createApp(ContainerInterface $container): App
+    {
+        AppFactory::setContainer($container);
+        $app = AppFactory::create();
+
+        $basePath = rtrim(str_replace('\\', '/', dirname($_SERVER['SCRIPT_NAME'] ?? '')), '/');
+        if ($basePath !== '' && $basePath !== '.') {
+            $app->setBasePath($basePath);
+        }
+
+        $app->addBodyParsingMiddleware();
+
+        $app->group('', function (RouteCollectorProxyInterface $group) use ($container) {
+            EconomyRoutes::register($group, $container);
+            BuildQueueRoutes::register($group, $container);
+            PlanetGeneratorRoutes::register($group, $container);
+        })->add(new AuthContextMiddleware($container->get(AuthService::class)));
+
+        $displayError = (getenv('APP_ENV') ?: 'dev') !== 'prod';
+        $app->addErrorMiddleware($displayError, true, true);
+
+        return $app;
+    }
+}
diff --git a/server/src/Config/ConfigLoader.php b/server/src/Config/ConfigLoader.php
new file mode 100644
index 0000000..7f2f59c
--- /dev/null
+++ b/server/src/Config/ConfigLoader.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Config;
+
+final class ConfigLoader
+{
+    private ConfigValidator $validator;
+    private string $baseDir;
+
+    /** @var array<string,array<string,mixed>> */
+    private array $cache = [];
+
+    public function __construct(ConfigValidator $validator, ?string $baseDir = null)
+    {
+        $this->validator = $validator;
+        $this->baseDir = $baseDir ?? dirname(__DIR__, 3) . '/config';
+    }
+
+    /**
+     * @return array<string,mixed>
+     */
+    public function planetClasses(): array
+    {
+        return $this->load('planet_classes.json', function (array $config): void {
+            $this->validator->validatePlanetClasses($config, 'planet_classes.json');
+        });
+    }
+
+    /**
+     * @return array<string,mixed>
+     */
+    public function races(): array
+    {
+        return $this->load('races.json', function (array $config): void {
+            $this->validator->validateRaces($config, 'races.json');
+        });
+    }
+
+    /**
+     * @return array<string,mixed>
+     */
+    public function blueprintsBuildings(): array
+    {
+        return $this->load('blueprints_buildings.json', function (array $config): void {
+            $this->validator->validateBlueprintsBuildings($config, 'blueprints_buildings.json');
+        });
+    }
+
+    /**
+     * @param callable(array<string,mixed>):void $validate
+     * @return array<string,mixed>
+     */
+    private function load(string $file, callable $validate): array
+    {
+        if (isset($this->cache[$file])) {
+            return $this->cache[$file];
+        }
+        $path = rtrim($this->baseDir, '/') . '/' . $file;
+        if (!file_exists($path)) {
+            throw new \RuntimeException("Config-Datei nicht gefunden: {$path}");
+        }
+        $raw = file_get_contents($path);
+        if ($raw === false) {
+            throw new \RuntimeException("Config-Datei konnte nicht gelesen werden: {$path}");
+        }
+        $data = json_decode($raw, true, flags: JSON_THROW_ON_ERROR);
+        if (!is_array($data)) {
+            throw new \RuntimeException("Config-Datei muss ein JSON-Objekt sein: {$path}");
+        }
+        $validate($data);
+        $this->cache[$file] = $data;
+        return $data;
+    }
+}
diff --git a/server/src/Config/ConfigValidationException.php b/server/src/Config/ConfigValidationException.php
new file mode 100644
index 0000000..8626c02
--- /dev/null
+++ b/server/src/Config/ConfigValidationException.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Config;
+
+final class ConfigValidationException extends \RuntimeException
+{
+    /** @var string[] */
+    private array $errors;
+
+    /**
+     * @param string[] $errors
+     */
+    public function __construct(string $file, array $errors)
+    {
+        $this->errors = $errors;
+        $message = "Config-Validation fehlgeschlagen: {$file}\n- " . implode("\n- ", $errors);
+        parent::__construct($message);
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getErrors(): array
+    {
+        return $this->errors;
+    }
+}
diff --git a/server/src/Config/ConfigValidator.php b/server/src/Config/ConfigValidator.php
new file mode 100644
index 0000000..b9a9d49
--- /dev/null
+++ b/server/src/Config/ConfigValidator.php
@@ -0,0 +1,197 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Config;
+
+final class ConfigValidator
+{
+    /**
+     * @param array<string,mixed> $config
+     */
+    public function validatePlanetClasses(array $config, string $file): void
+    {
+        $errors = [];
+        foreach (['resources', 'weights', 'tiers', 'classes', 'global_bounds'] as $key) {
+            if (!array_key_exists($key, $config)) {
+                $errors[] = "Fehlender Key '{$key}'";
+            }
+        }
+
+        if (isset($config['resources']) && (!is_array($config['resources']) || $config['resources'] === [])) {
+            $errors[] = "'resources' muss ein nicht-leeres Array sein";
+        }
+
+        $expected = $this->expectedResources();
+        if (isset($config['resources']) && is_array($config['resources'])) {
+            $missing = array_diff($expected, $config['resources']);
+            if ($missing) {
+                $errors[] = "'resources' fehlt: " . implode(', ', $missing);
+            }
+        }
+
+        if (isset($config['weights']) && !is_array($config['weights'])) {
+            $errors[] = "'weights' muss ein Objekt sein";
+        }
+
+        if (isset($config['weights']) && is_array($config['weights'])) {
+            foreach ($expected as $res) {
+                if (!isset($config['weights'][$res]) || !is_numeric($config['weights'][$res])) {
+                    $errors[] = "'weights.{$res}' muss numerisch sein";
+                }
+            }
+        }
+
+        if (isset($config['global_bounds']) && is_array($config['global_bounds'])) {
+            if (!isset($config['global_bounds']['min']) || !is_numeric($config['global_bounds']['min'])) {
+                $errors[] = "'global_bounds.min' muss numerisch sein";
+            }
+            if (!isset($config['global_bounds']['max']) || !is_numeric($config['global_bounds']['max'])) {
+                $errors[] = "'global_bounds.max' muss numerisch sein";
+            }
+        }
+
+        if (isset($config['tiers']) && is_array($config['tiers'])) {
+            foreach ($config['tiers'] as $tierKey => $tier) {
+                if (!is_array($tier)) {
+                    $errors[] = "Tier '{$tierKey}' muss ein Objekt sein";
+                    continue;
+                }
+                if (!isset($tier['target_score']) || !is_numeric($tier['target_score'])) {
+                    $errors[] = "Tier '{$tierKey}': 'target_score' fehlt oder ist nicht numerisch";
+                }
+                if (!isset($tier['epsilon']) || !is_numeric($tier['epsilon'])) {
+                    $errors[] = "Tier '{$tierKey}': 'epsilon' fehlt oder ist nicht numerisch";
+                }
+            }
+        }
+
+        if (isset($config['classes']) && is_array($config['classes'])) {
+            foreach ($config['classes'] as $classKey => $class) {
+                if (!is_array($class)) {
+                    $errors[] = "Klasse '{$classKey}' muss ein Objekt sein";
+                    continue;
+                }
+                if (!isset($class['spawn_weight']) || !is_numeric($class['spawn_weight'])) {
+                    $errors[] = "Klasse '{$classKey}': 'spawn_weight' fehlt oder ist nicht numerisch";
+                }
+                if (isset($class['constraints']) && !is_array($class['constraints'])) {
+                    $errors[] = "Klasse '{$classKey}': 'constraints' muss ein Objekt sein";
+                }
+                if (isset($class['constraints']) && is_array($class['constraints'])) {
+                    foreach ($class['constraints'] as $res => $constraint) {
+                        if (!is_array($constraint)) {
+                            $errors[] = "Constraint '{$classKey}.{$res}' muss ein Objekt sein";
+                            continue;
+                        }
+                        if (isset($constraint['min']) && !is_numeric($constraint['min'])) {
+                            $errors[] = "Constraint '{$classKey}.{$res}.min' muss numerisch sein";
+                        }
+                        if (isset($constraint['max']) && !is_numeric($constraint['max'])) {
+                            $errors[] = "Constraint '{$classKey}.{$res}.max' muss numerisch sein";
+                        }
+                    }
+                }
+                if (isset($class['temperature_range_c'])) {
+                    $range = $class['temperature_range_c'];
+                    if (!is_array($range) || count($range) !== 2) {
+                        $errors[] = "Klasse '{$classKey}': 'temperature_range_c' muss ein Array [min,max] sein";
+                    } else {
+                        [$min, $max] = array_values($range);
+                        if (!is_numeric($min) || !is_numeric($max)) {
+                            $errors[] = "Klasse '{$classKey}': 'temperature_range_c' Werte müssen numerisch sein";
+                        } elseif ((float)$min > (float)$max) {
+                            $errors[] = "Klasse '{$classKey}': 'temperature_range_c' min darf nicht größer als max sein";
+                        }
+                    }
+                }
+            }
+        }
+
+        if ($errors) {
+            throw new ConfigValidationException($file, $errors);
+        }
+    }
+
+    /**
+     * @param array<string,mixed> $config
+     */
+    public function validateRaces(array $config, string $file): void
+    {
+        $errors = [];
+        if (!isset($config['races']) || !is_array($config['races'])) {
+            $errors[] = "'races' muss ein Objekt sein";
+        }
+        if (isset($config['races']) && is_array($config['races'])) {
+            foreach ($config['races'] as $raceKey => $race) {
+                if (!is_array($race)) {
+                    $errors[] = "Race '{$raceKey}' muss ein Objekt sein";
+                    continue;
+                }
+                if (empty($race['name'])) {
+                    $errors[] = "Race '{$raceKey}': 'name' fehlt";
+                }
+                if (isset($race['modifiers']) && !is_array($race['modifiers'])) {
+                    $errors[] = "Race '{$raceKey}': 'modifiers' muss ein Objekt sein";
+                }
+            }
+        }
+        if ($errors) {
+            throw new ConfigValidationException($file, $errors);
+        }
+    }
+
+    /**
+     * @param array<string,mixed> $config
+     */
+    public function validateBlueprintsBuildings(array $config, string $file): void
+    {
+        $errors = [];
+        if (!isset($config['blueprints']) || !is_array($config['blueprints'])) {
+            $errors[] = "'blueprints' muss ein Array sein";
+        }
+        if (isset($config['blueprints']) && is_array($config['blueprints'])) {
+            foreach ($config['blueprints'] as $idx => $bp) {
+                if (!is_array($bp)) {
+                    $errors[] = "Blueprint #{$idx} muss ein Objekt sein";
+                    continue;
+                }
+                foreach (['kind', 'key', 'name'] as $req) {
+                    if (empty($bp[$req])) {
+                        $errors[] = "Blueprint #{$idx}: '{$req}' fehlt";
+                    }
+                }
+                if (isset($bp['effects']) && !is_array($bp['effects'])) {
+                    $errors[] = "Blueprint '{$bp['key'] ?? $idx}': 'effects' muss ein Array sein";
+                }
+                if (isset($bp['requirements']) && !is_array($bp['requirements'])) {
+                    $errors[] = "Blueprint '{$bp['key'] ?? $idx}': 'requirements' muss ein Array sein";
+                }
+                if (isset($bp['access']) && !is_array($bp['access'])) {
+                    $errors[] = "Blueprint '{$bp['key'] ?? $idx}': 'access' muss ein Objekt sein";
+                }
+            }
+        }
+        if ($errors) {
+            throw new ConfigValidationException($file, $errors);
+        }
+    }
+
+    /**
+     * @return string[]
+     */
+    public function expectedResources(): array
+    {
+        return [
+            'metal',
+            'alloy',
+            'crystals',
+            'energy',
+            'credits',
+            'population',
+            'water',
+            'deuterium',
+            'food',
+        ];
+    }
+}
diff --git a/server/src/Database/ConnectionFactory.php b/server/src/Database/ConnectionFactory.php
new file mode 100644
index 0000000..ca2b32a
--- /dev/null
+++ b/server/src/Database/ConnectionFactory.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Database;
+
+use PDO;
+
+final class ConnectionFactory
+{
+    public static function create(?string $dbName = null): PDO
+    {
+        $host = getenv('DB_HOST') ?: '127.0.0.1';
+        $port = getenv('DB_PORT') ?: '5432';
+        $name = $dbName ?? (getenv('DB_NAME') ?: 'galaxyforge');
+        $user = getenv('DB_USER') ?: 'galaxyforge';
+        $pass = getenv('DB_PASS') ?: 'galaxyforge';
+
+        $dsn = "pgsql:host={$host};port={$port};dbname={$name}";
+        $pdo = new PDO($dsn, $user, $pass, [
+            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+        ]);
+        return $pdo;
+    }
+}
diff --git a/server/src/Module/Auth/Middleware/AuthContextMiddleware.php b/server/src/Module/Auth/Middleware/AuthContextMiddleware.php
new file mode 100644
index 0000000..8f5734f
--- /dev/null
+++ b/server/src/Module/Auth/Middleware/AuthContextMiddleware.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Auth\Middleware;
+
+use App\Module\Auth\Service\AuthService;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+final class AuthContextMiddleware implements MiddlewareInterface
+{
+    public function __construct(private AuthService $authService)
+    {
+    }
+
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        $user = $this->authService->resolveUser($request);
+        if ($user !== null) {
+            $request = $request->withAttribute('user', $user);
+        }
+        return $handler->handle($request);
+    }
+}
diff --git a/server/src/Module/Auth/Service/AuthService.php b/server/src/Module/Auth/Service/AuthService.php
new file mode 100644
index 0000000..ca24c74
--- /dev/null
+++ b/server/src/Module/Auth/Service/AuthService.php
@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Auth\Service;
+
+use PDO;
+use Psr\Http\Message\ServerRequestInterface;
+
+final class AuthService
+{
+    public function __construct(private PDO $pdo)
+    {
+    }
+
+    /**
+     * @return array<string,mixed>|null
+     */
+    public function resolveUser(ServerRequestInterface $request): ?array
+    {
+        $id = $this->extractUserId($request);
+        if ($id !== null) {
+            return $this->findUserById($id);
+        }
+
+        if ((int)(getenv('DEV_MODE') ?: 0) === 1) {
+            $devUserId = getenv('DEV_USER_ID');
+            if ($devUserId !== false && is_numeric($devUserId)) {
+                $user = $this->findUserById((int)$devUserId);
+                if ($user) {
+                    return $user;
+                }
+            }
+            return $this->findFirstUser();
+        }
+
+        return null;
+    }
+
+    private function extractUserId(ServerRequestInterface $request): ?int
+    {
+        $header = $request->getHeaderLine('X-User-Id');
+        if ($header !== '' && is_numeric($header)) {
+            return (int)$header;
+        }
+        $header = $request->getHeaderLine('X-Dev-User');
+        if ($header !== '' && is_numeric($header)) {
+            return (int)$header;
+        }
+        $query = $request->getQueryParams();
+        if (isset($query['dev_user']) && is_numeric($query['dev_user'])) {
+            return (int)$query['dev_user'];
+        }
+        return null;
+    }
+
+    /**
+     * @return array<string,mixed>|null
+     */
+    private function findUserById(int $id): ?array
+    {
+        $stmt = $this->pdo->prepare('SELECT * FROM users WHERE id = :id');
+        $stmt->execute(['id' => $id]);
+        $row = $stmt->fetch();
+        return $row ?: null;
+    }
+
+    /**
+     * @return array<string,mixed>|null
+     */
+    private function findFirstUser(): ?array
+    {
+        $stmt = $this->pdo->query('SELECT * FROM users ORDER BY id ASC LIMIT 1');
+        $row = $stmt->fetch();
+        return $row ?: null;
+    }
+}
diff --git a/server/src/Module/Blueprints/Service/BlueprintService.php b/server/src/Module/Blueprints/Service/BlueprintService.php
new file mode 100644
index 0000000..3c5c4e1
--- /dev/null
+++ b/server/src/Module/Blueprints/Service/BlueprintService.php
@@ -0,0 +1,160 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Blueprints\Service;
+
+use App\Config\ConfigLoader;
+
+final class BlueprintService
+{
+    /** @var array<int,array<string,mixed>> */
+    private array $buildings;
+
+    public function __construct(ConfigLoader $configLoader)
+    {
+        $config = $configLoader->blueprintsBuildings();
+        $this->buildings = $config['blueprints'] ?? [];
+    }
+
+    /**
+     * @return array<int,array<string,mixed>>
+     */
+    public function allBuildings(): array
+    {
+        return $this->buildings;
+    }
+
+    /**
+     * @return array<string,mixed>|null
+     */
+    public function getBuilding(string $key): ?array
+    {
+        foreach ($this->buildings as $bp) {
+            if (($bp['key'] ?? null) === $key) {
+                return $bp;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * @param array<string,array{count:int,level:int}> $planetBuildings
+     * @return array{ok:bool,errors:string[]}
+     */
+    public function checkRequirements(array $blueprint, array $planetBuildings, string $raceKey): array
+    {
+        $errors = [];
+        $requirements = $blueprint['requirements'] ?? [];
+        if (!is_array($requirements)) {
+            return ['ok' => false, 'errors' => ['Requirements-Format ungültig.']];
+        }
+
+        foreach ($requirements as $req) {
+            if (!is_array($req) || empty($req['type'])) {
+                $errors[] = 'Requirement ohne Typ.';
+                continue;
+            }
+            switch ($req['type']) {
+                case 'building_count':
+                    $key = (string)($req['key'] ?? '');
+                    $min = (int)($req['min'] ?? 0);
+                    $count = $planetBuildings[$key]['count'] ?? 0;
+                    if ($count < $min) {
+                        $errors[] = "Benötigt {$min}x {$key}.";
+                    }
+                    break;
+                case 'building_tag_count':
+                    $tag = (string)($req['tag'] ?? '');
+                    $min = (int)($req['min'] ?? 0);
+                    $count = $this->countBuildingsByTag($planetBuildings, $tag);
+                    if ($count < $min) {
+                        $errors[] = "Benötigt {$min} Gebäude mit Tag {$tag}.";
+                    }
+                    break;
+                case 'has_capability':
+                    $cap = (string)($req['capability'] ?? '');
+                    if (!$this->hasCapability($planetBuildings, $cap)) {
+                        $errors[] = "Capability fehlt: {$cap}.";
+                    }
+                    break;
+                case 'player_race_in':
+                    $allowed = $req['races'] ?? [];
+                    if (is_array($allowed) && !in_array($raceKey, $allowed, true)) {
+                        $errors[] = "Race {$raceKey} ist nicht erlaubt.";
+                    }
+                    break;
+                case 'player_race_not_in':
+                    $blocked = $req['races'] ?? [];
+                    if (is_array($blocked) && in_array($raceKey, $blocked, true)) {
+                        $errors[] = "Race {$raceKey} ist ausgeschlossen.";
+                    }
+                    break;
+                default:
+                    $errors[] = "Requirement-Typ unbekannt: {$req['type']}";
+            }
+        }
+
+        return ['ok' => $errors === [], 'errors' => $errors];
+    }
+
+    /**
+     * @param array<string,array{count:int,level:int}> $planetBuildings
+     */
+    private function countBuildingsByTag(array $planetBuildings, string $tag): int
+    {
+        $count = 0;
+        foreach ($planetBuildings as $key => $data) {
+            $bp = $this->getBuilding($key);
+            if (!$bp) {
+                continue;
+            }
+            $tags = $bp['tags'] ?? [];
+            if (is_array($tags) && in_array($tag, $tags, true)) {
+                $count += (int)$data['count'];
+            }
+        }
+        return $count;
+    }
+
+    /**
+     * @param array<string,array{count:int,level:int}> $planetBuildings
+     */
+    private function hasCapability(array $planetBuildings, string $capability): bool
+    {
+        foreach ($planetBuildings as $key => $data) {
+            if (($data['count'] ?? 0) < 1) {
+                continue;
+            }
+            $bp = $this->getBuilding($key);
+            if (!$bp) {
+                continue;
+            }
+            $caps = $bp['capabilities'] ?? [];
+            if (is_array($caps) && in_array($capability, $caps, true)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @return array{ok:bool,errors:string[]}
+     */
+    public function checkAccess(array $blueprint, string $raceKey): array
+    {
+        $access = $blueprint['access'] ?? [];
+        if (!is_array($access)) {
+            return ['ok' => false, 'errors' => ['Access-Format ungültig.']];
+        }
+        $allowed = $access['allowed_races'] ?? [];
+        if (is_array($allowed) && $allowed !== [] && !in_array($raceKey, $allowed, true)) {
+            return ['ok' => false, 'errors' => ['Race ist nicht erlaubt.']];
+        }
+        $blocked = $access['blocked_races'] ?? [];
+        if (is_array($blocked) && in_array($raceKey, $blocked, true)) {
+            return ['ok' => false, 'errors' => ['Race ist blockiert.']];
+        }
+        return ['ok' => true, 'errors' => []];
+    }
+}
diff --git a/server/src/Module/BuildQueue/Controller/BuildController.php b/server/src/Module/BuildQueue/Controller/BuildController.php
new file mode 100644
index 0000000..2e2a5d6
--- /dev/null
+++ b/server/src/Module/BuildQueue/Controller/BuildController.php
@@ -0,0 +1,191 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\BuildQueue\Controller;
+
+use App\Module\Blueprints\Service\BlueprintService;
+use App\Module\BuildQueue\Service\BuildQueueService;
+use App\Module\Economy\Service\EconomyService;
+use App\Shared\Clock\TimeProvider;
+use App\Shared\Http\JsonResponder;
+use PDO;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Slim\Psr7\Response;
+
+final class BuildController
+{
+    public function __construct(
+        private EconomyService $economy,
+        private BuildQueueService $buildQueue,
+        private BlueprintService $blueprints,
+        private TimeProvider $timeProvider,
+        private PDO $pdo
+    ) {
+    }
+
+    public function start(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $user = $request->getAttribute('user');
+        if (!is_array($user) || !isset($user['id'])) {
+            return JsonResponder::withJson(new Response(), [
+                'error' => 'auth_required',
+                'message' => 'Authentifizierung erforderlich.'
+            ], 401);
+        }
+
+        $body = $request->getParsedBody();
+        if (!is_array($body)) {
+            $body = [];
+        }
+        $buildingKey = (string)($body['building_key'] ?? '');
+        $amount = (int)($body['amount'] ?? 1);
+        if ($buildingKey === '' || $amount < 1) {
+            return JsonResponder::withJson($response, [
+                'error' => 'invalid_input',
+                'message' => 'building_key und amount sind Pflichtfelder.'
+            ], 400);
+        }
+
+        $planetId = isset($body['planet_id']) ? (int)$body['planet_id'] : null;
+        $planet = $this->economy->getPlanetForUser((int)$user['id'], $planetId);
+
+        $state = $this->economy->updateResources((int)$planet['id']);
+        $this->buildQueue->finalizeJobs((int)$planet['id']);
+
+        $bp = $this->blueprints->getBuilding($buildingKey);
+        if (!$bp) {
+            return JsonResponder::withJson($response, [
+                'error' => 'unknown_building',
+                'message' => 'Blueprint nicht gefunden.'
+            ], 404);
+        }
+
+        $raceKey = (string)$user['race_key'];
+        $access = $this->blueprints->checkAccess($bp, $raceKey);
+        if (!$access['ok']) {
+            return JsonResponder::withJson($response, [
+                'error' => 'access_denied',
+                'message' => implode(' ', $access['errors'])
+            ], 403);
+        }
+
+        $buildings = $this->economy->getPlanetBuildings((int)$planet['id']);
+        $reqCheck = $this->blueprints->checkRequirements($bp, $buildings, $raceKey);
+        if (!$reqCheck['ok']) {
+            return JsonResponder::withJson($response, [
+                'error' => 'requirements_failed',
+                'message' => implode(' ', $reqCheck['errors'])
+            ], 422);
+        }
+
+        $queueSlots = $this->buildQueue->getQueueSlots((int)$planet['id'], 0);
+        if ($queueSlots <= 0) {
+            return JsonResponder::withJson($response, [
+                'error' => 'no_queue_slots',
+                'message' => 'Keine Bauzentren vorhanden.'
+            ], 409);
+        }
+        $activeJobs = $this->buildQueue->getActiveJobs((int)$planet['id']);
+        if (count($activeJobs) >= $queueSlots) {
+            return JsonResponder::withJson($response, [
+                'error' => 'no_queue_slots',
+                'message' => 'Keine freien Bauplätze verfügbar.'
+            ], 409);
+        }
+
+        $cost = $bp['cost'] ?? [];
+        if (!is_array($cost)) {
+            $cost = [];
+        }
+        $resources = $state['resources'];
+        $totalCost = [];
+        foreach ($cost as $res => $val) {
+            $totalCost[$res] = (float)$val * $amount;
+            if (($resources[$res] ?? 0.0) < $totalCost[$res]) {
+                return JsonResponder::withJson($response, [
+                    'error' => 'insufficient_resources',
+                    'message' => "Zu wenig {$res}."
+                ], 409);
+            }
+        }
+
+        foreach ($totalCost as $res => $val) {
+            $resources[$res] -= $val;
+        }
+        $stmt = $this->pdo->prepare('UPDATE planets SET resources = :resources WHERE id = :id');
+        $stmt->execute([
+            'resources' => json_encode($resources, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+            'id' => (int)$planet['id'],
+        ]);
+
+        $model = (string)($bp['model'] ?? 'stackable');
+        $buildTime = (int)($bp['build_time'] ?? 60) * $amount;
+        $now = $this->timeProvider->now();
+        $finishAt = $now->modify('+' . $buildTime . ' seconds');
+        $slotIndex = $this->nextSlotIndex($activeJobs, $queueSlots);
+
+        $stmt = $this->pdo->prepare(
+            'INSERT INTO build_jobs (planet_id, building_key, mode, delta_count, target_level, started_at, finish_at, slot_index)
+             VALUES (:planet_id, :building_key, :mode, :delta_count, :target_level, :started_at, :finish_at, :slot_index)
+             RETURNING *'
+        );
+        $stmt->execute([
+            'planet_id' => (int)$planet['id'],
+            'building_key' => $buildingKey,
+            'mode' => $model,
+            'delta_count' => $model === 'levelable' ? null : $amount,
+            'target_level' => $model === 'levelable' ? $amount : null,
+            'started_at' => $now->format('Y-m-d H:i:s'),
+            'finish_at' => $finishAt->format('Y-m-d H:i:s'),
+            'slot_index' => $slotIndex,
+        ]);
+        $job = $stmt->fetch();
+
+        return JsonResponder::withJson($response, [
+            'job' => $job,
+            'resources' => $resources,
+        ], 201);
+    }
+
+    public function jobs(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $user = $request->getAttribute('user');
+        if (!is_array($user) || !isset($user['id'])) {
+            return JsonResponder::withJson(new Response(), [
+                'error' => 'auth_required',
+                'message' => 'Authentifizierung erforderlich.'
+            ], 401);
+        }
+
+        $query = $request->getQueryParams();
+        $planetId = isset($query['planet_id']) ? (int)$query['planet_id'] : null;
+        $planet = $this->economy->getPlanetForUser((int)$user['id'], $planetId);
+
+        $finished = $this->buildQueue->finalizeJobs((int)$planet['id']);
+        $jobs = $this->buildQueue->getActiveJobs((int)$planet['id']);
+
+        return JsonResponder::withJson($response, [
+            'jobs' => $jobs,
+            'finished' => $finished,
+        ]);
+    }
+
+    /**
+     * @param array<int,array<string,mixed>> $jobs
+     */
+    private function nextSlotIndex(array $jobs, int $maxSlots): int
+    {
+        $used = [];
+        foreach ($jobs as $job) {
+            $used[(int)$job['slot_index']] = true;
+        }
+        for ($i = 0; $i < $maxSlots; $i++) {
+            if (!isset($used[$i])) {
+                return $i;
+            }
+        }
+        return max(0, $maxSlots - 1);
+    }
+}
diff --git a/server/src/Module/BuildQueue/Routes.php b/server/src/Module/BuildQueue/Routes.php
new file mode 100644
index 0000000..04eaeac
--- /dev/null
+++ b/server/src/Module/BuildQueue/Routes.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\BuildQueue;
+
+use App\Module\BuildQueue\Controller\BuildController;
+use App\Module\Permissions\Middleware\RequirePermission;
+use App\Module\Permissions\Service\PermissionService;
+use Psr\Container\ContainerInterface;
+use Slim\Interfaces\RouteCollectorProxyInterface;
+
+final class Routes
+{
+    public static function register(RouteCollectorProxyInterface $group, ContainerInterface $container): void
+    {
+        $controller = $container->get(BuildController::class);
+        $permissions = $container->get(PermissionService::class);
+
+        $group->post('/build/start', [$controller, 'start'])
+            ->add(RequirePermission::for($permissions, 'planet.public.view'));
+        $group->get('/build/jobs', [$controller, 'jobs'])
+            ->add(RequirePermission::for($permissions, 'planet.public.view'));
+    }
+}
diff --git a/server/src/Module/BuildQueue/Service/BuildQueueService.php b/server/src/Module/BuildQueue/Service/BuildQueueService.php
new file mode 100644
index 0000000..3683158
--- /dev/null
+++ b/server/src/Module/BuildQueue/Service/BuildQueueService.php
@@ -0,0 +1,149 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\BuildQueue\Service;
+
+use App\Module\Blueprints\Service\BlueprintService;
+use App\Shared\Clock\TimeProvider;
+use PDO;
+
+final class BuildQueueService
+{
+    public function __construct(
+        private PDO $pdo,
+        private BlueprintService $blueprints,
+        private TimeProvider $timeProvider
+    ) {
+    }
+
+    public function getQueueSlots(int $planetId, int $baseSlots = 0): int
+    {
+        $buildings = $this->getBuildings($planetId);
+        return $this->calculateQueueSlots($buildings, $baseSlots);
+    }
+
+    /**
+     * @param array<string,array{count:int,level:int}> $buildings
+     */
+    public function calculateQueueSlots(array $buildings, int $baseSlots = 0): int
+    {
+        $slots = $baseSlots;
+        foreach ($buildings as $key => $data) {
+            $bp = $this->blueprints->getBuilding($key);
+            if (!$bp) {
+                continue;
+            }
+            $model = (string)($bp['model'] ?? 'stackable');
+            $scale = $model === 'levelable' ? (int)$data['level'] : (int)$data['count'];
+            if ($scale <= 0) {
+                continue;
+            }
+            $effects = $bp['effects'] ?? [];
+            if (!is_array($effects)) {
+                continue;
+            }
+            foreach ($effects as $effect) {
+                if (!is_array($effect) || ($effect['type'] ?? '') !== 'queue_slots_add') {
+                    continue;
+                }
+                $slots += (int)($effect['amount'] ?? 0) * $scale;
+            }
+        }
+        return $slots;
+    }
+
+    /**
+     * @return array<int,array<string,mixed>>
+     */
+    public function getActiveJobs(int $planetId): array
+    {
+        $stmt = $this->pdo->prepare('SELECT * FROM build_jobs WHERE planet_id = :planet_id ORDER BY finish_at ASC');
+        $stmt->execute(['planet_id' => $planetId]);
+        return $stmt->fetchAll();
+    }
+
+    /**
+     * @return array<int,array<string,mixed>>
+     */
+    public function finalizeJobs(int $planetId): array
+    {
+        $now = $this->timeProvider->now()->format('Y-m-d H:i:s');
+        $stmt = $this->pdo->prepare('SELECT * FROM build_jobs WHERE planet_id = :planet_id AND finish_at <= :now ORDER BY finish_at ASC');
+        $stmt->execute(['planet_id' => $planetId, 'now' => $now]);
+        $ready = $stmt->fetchAll();
+        if (!$ready) {
+            return [];
+        }
+
+        foreach ($ready as $job) {
+            $this->applyJob($planetId, $job);
+        }
+
+        $stmt = $this->pdo->prepare('DELETE FROM build_jobs WHERE planet_id = :planet_id AND finish_at <= :now');
+        $stmt->execute(['planet_id' => $planetId, 'now' => $now]);
+        return $ready;
+    }
+
+    /**
+     * @param array<string,mixed> $job
+     */
+    private function applyJob(int $planetId, array $job): void
+    {
+        $mode = (string)($job['mode'] ?? 'stackable');
+        $key = (string)($job['building_key'] ?? '');
+        if ($key === '') {
+            return;
+        }
+
+        if ($mode === 'levelable') {
+            $targetLevel = (int)($job['target_level'] ?? 0);
+            $stmt = $this->pdo->prepare(
+                'INSERT INTO planet_buildings (planet_id, building_key, count, level)
+                 VALUES (:planet_id, :building_key, 0, :level)
+                 ON CONFLICT (planet_id, building_key)
+                 DO UPDATE SET level = EXCLUDED.level'
+            );
+            $stmt->execute([
+                'planet_id' => $planetId,
+                'building_key' => $key,
+                'level' => $targetLevel,
+            ]);
+            return;
+        }
+
+        $delta = (int)($job['delta_count'] ?? 0);
+        if ($delta <= 0) {
+            return;
+        }
+        $stmt = $this->pdo->prepare(
+            'INSERT INTO planet_buildings (planet_id, building_key, count, level)
+             VALUES (:planet_id, :building_key, :count, 0)
+             ON CONFLICT (planet_id, building_key)
+             DO UPDATE SET count = planet_buildings.count + EXCLUDED.count'
+        );
+        $stmt->execute([
+            'planet_id' => $planetId,
+            'building_key' => $key,
+            'count' => $delta,
+        ]);
+    }
+
+    /**
+     * @return array<string,array{count:int,level:int}>
+     */
+    private function getBuildings(int $planetId): array
+    {
+        $stmt = $this->pdo->prepare('SELECT building_key, count, level FROM planet_buildings WHERE planet_id = :planet_id');
+        $stmt->execute(['planet_id' => $planetId]);
+        $rows = $stmt->fetchAll();
+        $buildings = [];
+        foreach ($rows as $row) {
+            $buildings[$row['building_key']] = [
+                'count' => (int)$row['count'],
+                'level' => (int)$row['level'],
+            ];
+        }
+        return $buildings;
+    }
+}
diff --git a/server/src/Module/Economy/Controller/StateController.php b/server/src/Module/Economy/Controller/StateController.php
new file mode 100644
index 0000000..7b9a99e
--- /dev/null
+++ b/server/src/Module/Economy/Controller/StateController.php
@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Economy\Controller;
+
+use App\Module\BuildQueue\Service\BuildQueueService;
+use App\Module\Economy\Service\EconomyService;
+use App\Shared\Http\JsonResponder;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Slim\Psr7\Response;
+
+final class StateController
+{
+    public function __construct(
+        private EconomyService $economy,
+        private BuildQueueService $buildQueue
+    ) {
+    }
+
+    public function health(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        return JsonResponder::withJson($response, [
+            'status' => 'ok',
+            'time' => (new \DateTimeImmutable('now'))->format('c'),
+        ]);
+    }
+
+    public function state(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        $user = $request->getAttribute('user');
+        if (!is_array($user) || !isset($user['id'])) {
+            return JsonResponder::withJson(new Response(), [
+                'error' => 'auth_required',
+                'message' => 'Authentifizierung erforderlich.'
+            ], 401);
+        }
+
+        $query = $request->getQueryParams();
+        $planetId = isset($query['planet_id']) ? (int)$query['planet_id'] : null;
+        $planet = $this->economy->getPlanetForUser((int)$user['id'], $planetId);
+
+        $state = $this->economy->updateResources((int)$planet['id']);
+        $this->buildQueue->finalizeJobs((int)$planet['id']);
+
+        $buildings = $this->economy->getPlanetBuildings((int)$planet['id']);
+        $modifiers = json_decode((string)$planet['modifiers'], true) ?: [];
+        $calc = $this->economy->calcNetRates($buildings, $modifiers, (string)$user['race_key']);
+
+        $queueSlots = $this->buildQueue->getQueueSlots((int)$planet['id'], 0);
+        $jobs = $this->buildQueue->getActiveJobs((int)$planet['id']);
+
+        return JsonResponder::withJson($response, [
+            'planet' => [
+                'id' => (int)$planet['id'],
+                'class_key' => $planet['class_key'],
+                'planet_seed' => (int)$planet['planet_seed'],
+                'temperature_c' => (int)$planet['temperature_c'],
+                'modifiers' => json_decode((string)$planet['modifiers'], true) ?: [],
+            ],
+            'resources' => $state['resources'],
+            'net_rates_per_hour' => $calc['net_rates'],
+            'queue_slots' => $queueSlots,
+            'active_build_jobs' => $jobs,
+            'race' => $user['race_key'],
+            'breakdown' => $calc['breakdown'],
+        ]);
+    }
+}
diff --git a/server/src/Module/Economy/Routes.php b/server/src/Module/Economy/Routes.php
new file mode 100644
index 0000000..c04a513
--- /dev/null
+++ b/server/src/Module/Economy/Routes.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Economy;
+
+use App\Module\Economy\Controller\StateController;
+use App\Module\Permissions\Middleware\RequirePermission;
+use App\Module\Permissions\Service\PermissionService;
+use Psr\Container\ContainerInterface;
+use Slim\Interfaces\RouteCollectorProxyInterface;
+
+final class Routes
+{
+    public static function register(RouteCollectorProxyInterface $group, ContainerInterface $container): void
+    {
+        $controller = $container->get(StateController::class);
+        $permissions = $container->get(PermissionService::class);
+
+        $group->get('/health', [$controller, 'health']);
+        $group->get('/state', [$controller, 'state'])
+            ->add(RequirePermission::for($permissions, 'planet.public.view'));
+    }
+}
diff --git a/server/src/Module/Economy/Service/EconomyService.php b/server/src/Module/Economy/Service/EconomyService.php
new file mode 100644
index 0000000..5a3b1be
--- /dev/null
+++ b/server/src/Module/Economy/Service/EconomyService.php
@@ -0,0 +1,305 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Economy\Service;
+
+use App\Config\ConfigLoader;
+use App\Module\Blueprints\Service\BlueprintService;
+use App\Shared\Clock\TimeProvider;
+use PDO;
+
+final class EconomyService
+{
+    /** @var string[] */
+    private array $resources;
+
+    public function __construct(
+        private PDO $pdo,
+        private ConfigLoader $configLoader,
+        private BlueprintService $blueprints,
+        private TimeProvider $timeProvider
+    ) {
+        $planetConfig = $this->configLoader->planetClasses();
+        $this->resources = $planetConfig['resources'] ?? [];
+    }
+
+    /**
+     * @return array<string,mixed>
+     */
+    public function getPlanetForUser(int $userId, ?int $planetId = null): array
+    {
+        if ($planetId !== null) {
+            $stmt = $this->pdo->prepare('SELECT * FROM planets WHERE id = :id AND user_id = :user_id');
+            $stmt->execute(['id' => $planetId, 'user_id' => $userId]);
+            $planet = $stmt->fetch();
+            if ($planet) {
+                return $planet;
+            }
+        }
+        $stmt = $this->pdo->prepare('SELECT * FROM planets WHERE user_id = :user_id ORDER BY id ASC LIMIT 1');
+        $stmt->execute(['user_id' => $userId]);
+        $planet = $stmt->fetch();
+        if (!$planet) {
+            throw new \RuntimeException('Kein Planet für User gefunden.');
+        }
+        return $planet;
+    }
+
+    /**
+     * @return array<string,array{count:int,level:int}>
+     */
+    public function getPlanetBuildings(int $planetId): array
+    {
+        $stmt = $this->pdo->prepare('SELECT building_key, count, level FROM planet_buildings WHERE planet_id = :planet_id');
+        $stmt->execute(['planet_id' => $planetId]);
+        $rows = $stmt->fetchAll();
+        $buildings = [];
+        foreach ($rows as $row) {
+            $buildings[$row['building_key']] = [
+                'count' => (int)$row['count'],
+                'level' => (int)$row['level'],
+            ];
+        }
+        return $buildings;
+    }
+
+    /**
+     * @return array{resources:array<string,float>,net_rates:array<string,float>,breakdown:array<string,mixed>,caps:array<string,float>}
+     */
+    public function updateResources(int $planetId): array
+    {
+        $stmt = $this->pdo->prepare('SELECT * FROM planets WHERE id = :id');
+        $stmt->execute(['id' => $planetId]);
+        $planet = $stmt->fetch();
+        if (!$planet) {
+            throw new \RuntimeException('Planet nicht gefunden.');
+        }
+
+        $resources = json_decode((string)$planet['resources'], true) ?: [];
+        foreach ($this->resources as $res) {
+            if (!isset($resources[$res])) {
+                $resources[$res] = 0.0;
+            }
+        }
+
+        $buildings = $this->getPlanetBuildings($planetId);
+        $raceKey = $this->getRaceForPlanetUser((int)$planet['user_id']);
+        $modifiers = json_decode((string)$planet['modifiers'], true) ?: [];
+
+        $calc = $this->calcNetRates($buildings, $modifiers, $raceKey);
+        $netRates = $calc['net_rates'];
+        $caps = $calc['caps'];
+
+        $last = new \DateTimeImmutable($planet['last_resource_update_at']);
+        $now = $this->timeProvider->now();
+        $dt = max(0, $now->getTimestamp() - $last->getTimestamp());
+        if ($dt > 0) {
+            foreach ($this->resources as $res) {
+                $resources[$res] = (float)$resources[$res] + ($netRates[$res] ?? 0.0) * ($dt / 3600);
+                if ($resources[$res] < 0) {
+                    $resources[$res] = 0.0;
+                }
+                if (isset($caps[$res]) && is_numeric($caps[$res])) {
+                    $resources[$res] = min($resources[$res], (float)$caps[$res]);
+                }
+            }
+            $stmt = $this->pdo->prepare('UPDATE planets SET resources = :resources, last_resource_update_at = :now WHERE id = :id');
+            $stmt->execute([
+                'resources' => json_encode($resources, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+                'now' => $now->format('Y-m-d H:i:s'),
+                'id' => $planetId,
+            ]);
+        }
+
+        return [
+            'resources' => $resources,
+            'net_rates' => $netRates,
+            'breakdown' => $calc['breakdown'],
+            'caps' => $caps,
+        ];
+    }
+
+    /**
+     * @param array<string,array{count:int,level:int}> $buildings
+     * @param array<string,mixed> $planetModifiers
+     * @return array{net_rates:array<string,float>,breakdown:array<string,mixed>,caps:array<string,float>}
+     */
+    public function calcNetRates(array $buildings, array $planetModifiers, string $raceKey): array
+    {
+        $baseProduce = array_fill_keys($this->resources, 0.0);
+        $baseConsume = array_fill_keys($this->resources, 0.0);
+        $caps = [];
+
+        $planetProduceBonus = array_fill_keys($this->resources, 0.0);
+        $raceProduceBonus = array_fill_keys($this->resources, 0.0);
+        $raceConsumeBonus = array_fill_keys($this->resources, 0.0);
+        $bonusEffectsProduce = array_fill_keys($this->resources, 0.0);
+        $bonusEffectsConsume = array_fill_keys($this->resources, 0.0);
+
+        foreach ($planetModifiers as $res => $val) {
+            if (array_key_exists($res, $planetProduceBonus)) {
+                $planetProduceBonus[$res] = (float)$val;
+            }
+        }
+
+        $races = $this->configLoader->races();
+        $race = $races['races'][$raceKey] ?? null;
+        if (is_array($race)) {
+            $raceProd = $race['modifiers']['produce'] ?? [];
+            $raceCons = $race['modifiers']['consume'] ?? [];
+            if (is_array($raceProd)) {
+                foreach ($raceProd as $res => $val) {
+                    if (array_key_exists($res, $raceProduceBonus)) {
+                        $raceProduceBonus[$res] += (float)$val;
+                    }
+                }
+            }
+            if (is_array($raceCons)) {
+                foreach ($raceCons as $res => $val) {
+                    if (array_key_exists($res, $raceConsumeBonus)) {
+                        $raceConsumeBonus[$res] += (float)$val;
+                    }
+                }
+            }
+        }
+
+        foreach ($buildings as $key => $data) {
+            $bp = $this->blueprints->getBuilding($key);
+            if (!$bp) {
+                continue;
+            }
+            $model = (string)($bp['model'] ?? 'stackable');
+            $scale = $model === 'levelable' ? (int)$data['level'] : (int)$data['count'];
+            if ($scale <= 0) {
+                continue;
+            }
+            $effects = $bp['effects'] ?? [];
+            if (!is_array($effects)) {
+                continue;
+            }
+            foreach ($effects as $effect) {
+                if (!is_array($effect) || empty($effect['type'])) {
+                    continue;
+                }
+                switch ($effect['type']) {
+                    case 'produce':
+                        $res = (string)($effect['resource'] ?? '');
+                        $amount = (float)($effect['amount'] ?? 0.0);
+                        if (array_key_exists($res, $baseProduce)) {
+                            $baseProduce[$res] += $amount * $scale;
+                        }
+                        break;
+                    case 'consume':
+                        $res = (string)($effect['resource'] ?? '');
+                        $amount = (float)($effect['amount'] ?? 0.0);
+                        if (array_key_exists($res, $baseConsume)) {
+                            $baseConsume[$res] += $amount * $scale;
+                        }
+                        break;
+                    case 'convert':
+                        $inputs = $effect['inputs'] ?? [];
+                        $outputs = $effect['outputs'] ?? [];
+                        if (is_array($inputs)) {
+                            foreach ($inputs as $res => $amount) {
+                                if (array_key_exists($res, $baseConsume)) {
+                                    $baseConsume[$res] += (float)$amount * $scale;
+                                }
+                            }
+                        }
+                        if (is_array($outputs)) {
+                            foreach ($outputs as $res => $amount) {
+                                if (array_key_exists($res, $baseProduce)) {
+                                    $baseProduce[$res] += (float)$amount * $scale;
+                                }
+                            }
+                        }
+                        break;
+                    case 'capacity_add':
+                        $res = (string)($effect['resource'] ?? '');
+                        $amount = (float)($effect['amount'] ?? 0.0);
+                        if (!isset($caps[$res])) {
+                            $caps[$res] = 0.0;
+                        }
+                        $caps[$res] += $amount * $scale;
+                        break;
+                    case 'modifier_add':
+                        $target = $effect['target'] ?? [];
+                        if (!is_array($target)) {
+                            break;
+                        }
+                        $res = (string)($target['resource'] ?? '');
+                        $field = (string)($target['field'] ?? 'produce');
+                        $amount = (float)($effect['amount'] ?? 0.0);
+                        if ($field === 'consume' && array_key_exists($res, $bonusEffectsConsume)) {
+                            $bonusEffectsConsume[$res] += $amount;
+                        } elseif (array_key_exists($res, $bonusEffectsProduce)) {
+                            $bonusEffectsProduce[$res] += $amount;
+                        }
+                        break;
+                }
+            }
+        }
+
+        $netRates = [];
+        $effectiveProduce = [];
+        $effectiveConsume = [];
+        $prodMultiplier = [];
+        $consMultiplier = [];
+
+        foreach ($this->resources as $res) {
+            $prodMultiplier[$res] = self::multiplyBonuses([
+                $planetProduceBonus[$res] ?? 0.0,
+                $raceProduceBonus[$res] ?? 0.0,
+                $bonusEffectsProduce[$res] ?? 0.0,
+            ]);
+            $consMultiplier[$res] = self::multiplyBonuses([
+                $raceConsumeBonus[$res] ?? 0.0,
+                $bonusEffectsConsume[$res] ?? 0.0,
+            ]);
+
+            $effectiveProduce[$res] = $baseProduce[$res] * $prodMultiplier[$res];
+            $effectiveConsume[$res] = $baseConsume[$res] * $consMultiplier[$res];
+            $netRates[$res] = $effectiveProduce[$res] - $effectiveConsume[$res];
+        }
+
+        $breakdown = [
+            'produce' => [
+                'base' => $baseProduce,
+                'planet' => $planetProduceBonus,
+                'race' => $raceProduceBonus,
+                'effects' => $bonusEffectsProduce,
+                'result' => $effectiveProduce,
+            ],
+            'consume' => [
+                'base' => $baseConsume,
+                'race' => $raceConsumeBonus,
+                'effects' => $bonusEffectsConsume,
+                'result' => $effectiveConsume,
+            ],
+        ];
+
+        return [
+            'net_rates' => $netRates,
+            'breakdown' => $breakdown,
+            'caps' => $caps,
+        ];
+    }
+
+    public static function multiplyBonuses(array $bonuses): float
+    {
+        $mult = 1.0;
+        foreach ($bonuses as $bonus) {
+            $mult *= (1.0 + (float)$bonus);
+        }
+        return $mult;
+    }
+
+    private function getRaceForPlanetUser(int $userId): string
+    {
+        $stmt = $this->pdo->prepare('SELECT race_key FROM users WHERE id = :id');
+        $stmt->execute(['id' => $userId]);
+        $race = $stmt->fetchColumn();
+        return $race ? (string)$race : 'human';
+    }
+}
diff --git a/server/src/Module/Permissions/Middleware/RequirePermission.php b/server/src/Module/Permissions/Middleware/RequirePermission.php
new file mode 100644
index 0000000..abf7a7e
--- /dev/null
+++ b/server/src/Module/Permissions/Middleware/RequirePermission.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Permissions\Middleware;
+
+use App\Module\Permissions\Service\PermissionService;
+use App\Shared\Http\JsonResponder;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use Slim\Psr7\Response;
+
+final class RequirePermission implements MiddlewareInterface
+{
+    public function __construct(
+        private PermissionService $permissions,
+        private string $permissionKey
+    ) {
+    }
+
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        $user = $request->getAttribute('user');
+        if (!is_array($user) || !isset($user['id'])) {
+            return JsonResponder::withJson(new Response(), [
+                'error' => 'auth_required',
+                'message' => 'Authentifizierung erforderlich.'
+            ], 401);
+        }
+
+        if (!$this->permissions->can((int)$user['id'], $this->permissionKey)) {
+            return JsonResponder::withJson(new Response(), [
+                'error' => 'forbidden',
+                'message' => 'Keine Berechtigung für diese Aktion.',
+                'permission' => $this->permissionKey,
+            ], 403);
+        }
+
+        return $handler->handle($request);
+    }
+
+    public static function for(PermissionService $permissions, string $permissionKey): self
+    {
+        return new self($permissions, $permissionKey);
+    }
+}
diff --git a/server/src/Module/Permissions/Permissions.php b/server/src/Module/Permissions/Permissions.php
new file mode 100644
index 0000000..ccce151
--- /dev/null
+++ b/server/src/Module/Permissions/Permissions.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Permissions;
+
+final class Permissions
+{
+    /**
+     * @return array<int,array<string,string>>
+     */
+    public static function definitions(): array
+    {
+        return [
+            [
+                'key' => 'planet.admin.generate',
+                'module' => 'planet',
+                'description' => 'Universum/Planeten generieren',
+            ],
+            [
+                'key' => 'planet.admin.regen',
+                'module' => 'planet',
+                'description' => 'Planeten neu generieren',
+            ],
+            [
+                'key' => 'planet.public.view',
+                'module' => 'planet',
+                'description' => 'Planetenstatus ansehen',
+            ],
+            [
+                'key' => 'blueprints.admin.add',
+                'module' => 'blueprints',
+                'description' => 'Blueprints administrativ hinzufügen',
+            ],
+        ];
+    }
+}
diff --git a/server/src/Module/Permissions/Service/PermissionService.php b/server/src/Module/Permissions/Service/PermissionService.php
new file mode 100644
index 0000000..0c08529
--- /dev/null
+++ b/server/src/Module/Permissions/Service/PermissionService.php
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Permissions\Service;
+
+use PDO;
+
+final class PermissionService
+{
+    public function __construct(private PDO $pdo)
+    {
+    }
+
+    public function can(int $userId, string $permissionKey): bool
+    {
+        $stmt = $this->pdo->prepare(
+            'SELECT uo.effect
+             FROM user_permission_overrides uo
+             JOIN permissions p ON p.id = uo.permission_id
+             WHERE uo.user_id = :user_id AND p.key = :key
+             LIMIT 1'
+        );
+        $stmt->execute(['user_id' => $userId, 'key' => $permissionKey]);
+        $override = $stmt->fetchColumn();
+        if ($override === 'deny') {
+            return false;
+        }
+        if ($override === 'allow') {
+            return true;
+        }
+
+        $stmt = $this->pdo->prepare(
+            'SELECT 1
+             FROM user_roles ur
+             JOIN role_permissions rp ON rp.role_id = ur.role_id
+             JOIN permissions p ON p.id = rp.permission_id
+             WHERE ur.user_id = :user_id AND p.key = :key
+             LIMIT 1'
+        );
+        $stmt->execute(['user_id' => $userId, 'key' => $permissionKey]);
+        return $stmt->fetchColumn() !== false;
+    }
+}
diff --git a/server/src/Module/PlanetGenerator/Controller/AdminPlanetController.php b/server/src/Module/PlanetGenerator/Controller/AdminPlanetController.php
new file mode 100644
index 0000000..e831f6a
--- /dev/null
+++ b/server/src/Module/PlanetGenerator/Controller/AdminPlanetController.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\PlanetGenerator\Controller;
+
+use App\Shared\Http\JsonResponder;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+final class AdminPlanetController
+{
+    public function generate(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
+    {
+        return JsonResponder::withJson($response, [
+            'status' => 'ok',
+            'message' => 'Stub: Universum generieren (v0.1).'
+        ]);
+    }
+}
diff --git a/server/src/Module/PlanetGenerator/Routes.php b/server/src/Module/PlanetGenerator/Routes.php
new file mode 100644
index 0000000..92e3029
--- /dev/null
+++ b/server/src/Module/PlanetGenerator/Routes.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\PlanetGenerator;
+
+use App\Module\Permissions\Middleware\RequirePermission;
+use App\Module\Permissions\Service\PermissionService;
+use App\Module\PlanetGenerator\Controller\AdminPlanetController;
+use Psr\Container\ContainerInterface;
+use Slim\Interfaces\RouteCollectorProxyInterface;
+
+final class Routes
+{
+    public static function register(RouteCollectorProxyInterface $group, ContainerInterface $container): void
+    {
+        $controller = $container->get(AdminPlanetController::class);
+        $permissions = $container->get(PermissionService::class);
+
+        $group->post('/admin/universe/generate', [$controller, 'generate'])
+            ->add(RequirePermission::for($permissions, 'planet.admin.generate'));
+    }
+}
diff --git a/server/src/Module/PlanetGenerator/Service/PlanetGenerator.php b/server/src/Module/PlanetGenerator/Service/PlanetGenerator.php
new file mode 100644
index 0000000..788cd43
--- /dev/null
+++ b/server/src/Module/PlanetGenerator/Service/PlanetGenerator.php
@@ -0,0 +1,147 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\PlanetGenerator\Service;
+
+use App\Config\ConfigLoader;
+
+final class PlanetGenerator
+{
+    /** @var array<string,mixed> */
+    private array $config;
+
+    public function __construct(ConfigLoader $configLoader)
+    {
+        $this->config = $configLoader->planetClasses();
+    }
+
+    /**
+     * @return array{class_key:string,tier_key:string,modifiers:array<string,float>,score:float,temperature_c:int}
+     */
+    public function generate(string $classKey, string $tierKey, ?int $seed = null): array
+    {
+        $classes = $this->config['classes'] ?? [];
+        if (!isset($classes[$classKey])) {
+            throw new \RuntimeException("Planetklasse nicht gefunden: {$classKey}");
+        }
+        $tiers = $this->config['tiers'] ?? [];
+        if (!isset($tiers[$tierKey])) {
+            throw new \RuntimeException("Tier nicht gefunden: {$tierKey}");
+        }
+
+        $resources = $this->config['resources'] ?? [];
+        $weights = $this->config['weights'] ?? [];
+        $bounds = $this->config['global_bounds'] ?? ['min' => -1.0, 'max' => 1.0];
+
+        $modifiers = [];
+        foreach ($resources as $res) {
+            $modifiers[$res] = 0.0;
+        }
+
+        $seed = $seed ?? 0;
+        $rand = new \Random\Randomizer(new \Random\Engine\Mt19937($seed));
+
+        $constraints = $classes[$classKey]['constraints'] ?? [];
+        foreach ($constraints as $res => $constraint) {
+            if (!array_key_exists($res, $modifiers) || !is_array($constraint)) {
+                continue;
+            }
+            $min = $constraint['min'] ?? null;
+            $max = $constraint['max'] ?? null;
+            if ($min !== null && $max !== null) {
+                $modifiers[$res] = $this->randomFloat((float)$min, (float)$max, $rand);
+            } elseif ($min !== null) {
+                $modifiers[$res] = (float)$min;
+            } elseif ($max !== null) {
+                $modifiers[$res] = (float)$max;
+            }
+        }
+
+        $target = (float)$tiers[$tierKey]['target_score'];
+        $epsilon = (float)$tiers[$tierKey]['epsilon'];
+        $score = $this->calculateScore($modifiers);
+        $delta = $target - $score;
+
+        $adjustable = array_diff($resources, array_keys($constraints));
+        $iterations = 0;
+        while (abs($delta) > $epsilon && $iterations < 12 && $adjustable) {
+            $sumWeights = 0.0;
+            foreach ($adjustable as $res) {
+                $sumWeights += (float)($weights[$res] ?? 0.0);
+            }
+            if ($sumWeights === 0.0) {
+                break;
+            }
+
+            $achieved = 0.0;
+            foreach ($adjustable as $res) {
+                $step = $delta / $sumWeights;
+                $before = $modifiers[$res];
+                $after = $this->clamp($before + $step, (float)$bounds['min'], (float)$bounds['max']);
+                $modifiers[$res] = $after;
+                $achieved += ((float)$weights[$res] ?? 0.0) * ($after - $before);
+            }
+
+            $delta -= $achieved;
+            $adjustable = array_values(array_filter($adjustable, function (string $res) use ($modifiers, $bounds): bool {
+                $min = (float)$bounds['min'];
+                $max = (float)$bounds['max'];
+                return $modifiers[$res] > $min && $modifiers[$res] < $max;
+            }));
+            $iterations++;
+        }
+
+        $score = $this->calculateScore($modifiers);
+        $temperatureC = $this->rollTemperature($classes[$classKey]['temperature_range_c'] ?? null, $rand);
+        return [
+            'class_key' => $classKey,
+            'tier_key' => $tierKey,
+            'modifiers' => $modifiers,
+            'score' => $score,
+            'temperature_c' => $temperatureC,
+        ];
+    }
+
+    /**
+     * @param array<string,float> $modifiers
+     */
+    public function calculateScore(array $modifiers): float
+    {
+        $weights = $this->config['weights'] ?? [];
+        $sum = 0.0;
+        foreach ($modifiers as $res => $value) {
+            $sum += ((float)($weights[$res] ?? 0.0)) * (float)$value;
+        }
+        return $sum;
+    }
+
+    private function clamp(float $value, float $min, float $max): float
+    {
+        return max($min, min($max, $value));
+    }
+
+    private function randomFloat(float $min, float $max, ?\Random\Randomizer $rand): float
+    {
+        $int = $rand->getInt(0, 1_000_000);
+        $ratio = $int / 1_000_000;
+        return $min + ($max - $min) * $ratio;
+    }
+
+    /**
+     * @param array<int|float>|null $range
+     */
+    private function rollTemperature($range, \Random\Randomizer $rand): int
+    {
+        if (!is_array($range) || count($range) !== 2) {
+            return 0;
+        }
+        [$min, $max] = array_values($range);
+        $minInt = (int)round((float)$min);
+        $maxInt = (int)round((float)$max);
+        if ($minInt > $maxInt) {
+            return 0;
+        }
+        return $rand->getInt($minInt, $maxInt);
+    }
+}
diff --git a/server/src/Shared/Clock/FixedTimeProvider.php b/server/src/Shared/Clock/FixedTimeProvider.php
new file mode 100644
index 0000000..37da2f6
--- /dev/null
+++ b/server/src/Shared/Clock/FixedTimeProvider.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Clock;
+
+final class FixedTimeProvider implements TimeProvider
+{
+    private \DateTimeImmutable $now;
+
+    public function __construct(\DateTimeImmutable $now)
+    {
+        $this->now = $now;
+    }
+
+    public function now(): \DateTimeImmutable
+    {
+        return $this->now;
+    }
+
+    public function setNow(\DateTimeImmutable $now): void
+    {
+        $this->now = $now;
+    }
+}
diff --git a/server/src/Shared/Clock/SystemTimeProvider.php b/server/src/Shared/Clock/SystemTimeProvider.php
new file mode 100644
index 0000000..0726241
--- /dev/null
+++ b/server/src/Shared/Clock/SystemTimeProvider.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Clock;
+
+final class SystemTimeProvider implements TimeProvider
+{
+    public function now(): \DateTimeImmutable
+    {
+        return new \DateTimeImmutable('now');
+    }
+}
diff --git a/server/src/Shared/Clock/TimeProvider.php b/server/src/Shared/Clock/TimeProvider.php
new file mode 100644
index 0000000..a422962
--- /dev/null
+++ b/server/src/Shared/Clock/TimeProvider.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Clock;
+
+interface TimeProvider
+{
+    public function now(): \DateTimeImmutable;
+}
diff --git a/server/src/Shared/Http/JsonResponder.php b/server/src/Shared/Http/JsonResponder.php
new file mode 100644
index 0000000..3dfe88b
--- /dev/null
+++ b/server/src/Shared/Http/JsonResponder.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Http;
+
+use Psr\Http\Message\ResponseInterface;
+
+final class JsonResponder
+{
+    /**
+     * @param array<string,mixed> $data
+     */
+    public static function withJson(ResponseInterface $response, array $data, int $status = 200): ResponseInterface
+    {
+        $payload = json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+        $response->getBody()->write($payload === false ? '{}' : $payload);
+        return $response
+            ->withHeader('Content-Type', 'application/json')
+            ->withStatus($status);
+    }
+}
diff --git a/server/tests/Integration/BuildStartTest.php b/server/tests/Integration/BuildStartTest.php
new file mode 100644
index 0000000..b466cb0
--- /dev/null
+++ b/server/tests/Integration/BuildStartTest.php
@@ -0,0 +1,89 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Integration;
+
+use App\Shared\Clock\FixedTimeProvider;
+use App\Tests\Support\TestAppFactory;
+use App\Tests\Support\TestDatabase;
+use PHPUnit\Framework\TestCase;
+use Slim\Psr7\Factory\ServerRequestFactory;
+
+final class BuildStartTest extends TestCase
+{
+    public function testBuildStartAndFinalize(): void
+    {
+        $pdo = TestDatabase::create();
+        TestDatabase::reset($pdo);
+        $seed = TestDatabase::seedMinimal($pdo);
+        $userId = (int)$seed['user_id'];
+
+        $resources = [
+            'metal' => 1000.0,
+            'alloy' => 0.0,
+            'crystals' => 1000.0,
+            'energy' => 0.0,
+            'credits' => 0.0,
+            'population' => 0.0,
+            'water' => 0.0,
+            'deuterium' => 0.0,
+            'food' => 0.0,
+        ];
+
+        $stmt = $pdo->prepare(
+            'INSERT INTO planets (user_id, name, class_key, planet_seed, temperature_c, modifiers, resources, last_resource_update_at)
+             VALUES (:user_id, :name, :class_key, :planet_seed, :temperature_c, :modifiers, :resources, :last_update)
+             RETURNING id'
+        );
+        $stmt->execute([
+            'user_id' => $userId,
+            'name' => 'Testworld',
+            'class_key' => 'temperate',
+            'planet_seed' => 7,
+            'temperature_c' => 18,
+            'modifiers' => json_encode(['metal' => 0.0], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+            'resources' => json_encode($resources, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+            'last_update' => '2026-02-03 00:00:00',
+        ]);
+        $planetId = (int)$stmt->fetchColumn();
+
+        $stmt = $pdo->prepare(
+            'INSERT INTO planet_buildings (planet_id, building_key, count, level)
+             VALUES (:planet_id, :building_key, :count, 0)'
+        );
+        $stmt->execute(['planet_id' => $planetId, 'building_key' => 'build_center', 'count' => 1]);
+
+        $time = new FixedTimeProvider(new \DateTimeImmutable('2026-02-03 00:00:00'));
+        $app = TestAppFactory::create($pdo, $time);
+
+        $factory = new ServerRequestFactory();
+        $request = $factory->createServerRequest('POST', '/build/start')
+            ->withHeader('Content-Type', 'application/json')
+            ->withHeader('X-User-Id', (string)$userId);
+
+        $request->getBody()->write(json_encode([
+            'building_key' => 'ore_mine',
+            'amount' => 1,
+            'planet_id' => $planetId,
+        ]));
+        $request->getBody()->rewind();
+
+        $response = $app->handle($request);
+        self::assertSame(201, $response->getStatusCode());
+
+        $body = json_decode((string)$response->getBody(), true);
+        self::assertSame(880.0, $body['resources']['metal']);
+        self::assertSame(940.0, $body['resources']['crystals']);
+
+        $time->setNow(new \DateTimeImmutable('2026-02-03 00:02:00'));
+        $jobsRequest = $factory->createServerRequest('GET', '/build/jobs')
+            ->withHeader('X-User-Id', (string)$userId);
+
+        $jobsResponse = $app->handle($jobsRequest);
+        self::assertSame(200, $jobsResponse->getStatusCode());
+
+        $count = (int)$pdo->query("SELECT count FROM planet_buildings WHERE planet_id = {$planetId} AND building_key = 'ore_mine'")->fetchColumn();
+        self::assertSame(1, $count);
+    }
+}
diff --git a/server/tests/Integration/PermissionDenyTest.php b/server/tests/Integration/PermissionDenyTest.php
new file mode 100644
index 0000000..6e07eff
--- /dev/null
+++ b/server/tests/Integration/PermissionDenyTest.php
@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Integration;
+
+use App\Shared\Clock\FixedTimeProvider;
+use App\Tests\Support\TestAppFactory;
+use App\Tests\Support\TestDatabase;
+use PHPUnit\Framework\TestCase;
+use Slim\Psr7\Factory\ServerRequestFactory;
+
+final class PermissionDenyTest extends TestCase
+{
+    public function testDenyOverrideBlocksPermission(): void
+    {
+        $pdo = TestDatabase::create();
+        TestDatabase::reset($pdo);
+        $seed = TestDatabase::seedMinimal($pdo);
+        $userId = (int)$seed['user_id'];
+
+        $resources = [
+            'metal' => 100.0,
+            'alloy' => 0.0,
+            'crystals' => 50.0,
+            'energy' => 0.0,
+            'credits' => 0.0,
+            'population' => 0.0,
+            'water' => 0.0,
+            'deuterium' => 0.0,
+            'food' => 0.0,
+        ];
+
+        $stmt = $pdo->prepare(
+            'INSERT INTO planets (user_id, name, class_key, planet_seed, temperature_c, modifiers, resources, last_resource_update_at)
+             VALUES (:user_id, :name, :class_key, :planet_seed, :temperature_c, :modifiers, :resources, :last_update)'
+        );
+        $stmt->execute([
+            'user_id' => $userId,
+            'name' => 'Denied',
+            'class_key' => 'temperate',
+            'planet_seed' => 9,
+            'temperature_c' => 12,
+            'modifiers' => json_encode(['metal' => 0.0], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+            'resources' => json_encode($resources, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+            'last_update' => '2026-02-03 00:00:00',
+        ]);
+
+        $permissionId = (int)$pdo->query("SELECT id FROM permissions WHERE key = 'planet.public.view'")->fetchColumn();
+        $pdo->exec("INSERT INTO user_permission_overrides (user_id, permission_id, effect) VALUES ({$userId}, {$permissionId}, 'deny')");
+
+        $time = new FixedTimeProvider(new \DateTimeImmutable('2026-02-03 00:00:00'));
+        $app = TestAppFactory::create($pdo, $time);
+
+        $factory = new ServerRequestFactory();
+        $request = $factory->createServerRequest('GET', '/state')
+            ->withHeader('X-User-Id', (string)$userId);
+
+        $response = $app->handle($request);
+        self::assertSame(403, $response->getStatusCode());
+    }
+}
diff --git a/server/tests/Support/TestAppFactory.php b/server/tests/Support/TestAppFactory.php
new file mode 100644
index 0000000..880bd06
--- /dev/null
+++ b/server/tests/Support/TestAppFactory.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Support;
+
+use App\Bootstrap;
+use App\Config\ConfigLoader;
+use App\Config\ConfigValidator;
+use App\Shared\Clock\TimeProvider;
+use Psr\Container\ContainerInterface;
+use Slim\App;
+
+final class TestAppFactory
+{
+    public static function create(\PDO $pdo, TimeProvider $timeProvider): App
+    {
+        $repoRoot = dirname(__DIR__, 3);
+        $container = Bootstrap::buildContainer([
+            \PDO::class => $pdo,
+            TimeProvider::class => $timeProvider,
+            ConfigLoader::class => new ConfigLoader(new ConfigValidator(), $repoRoot . '/config'),
+        ]);
+
+        return Bootstrap::createApp($container);
+    }
+}
diff --git a/server/tests/Support/TestDatabase.php b/server/tests/Support/TestDatabase.php
new file mode 100644
index 0000000..1c997fa
--- /dev/null
+++ b/server/tests/Support/TestDatabase.php
@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Support;
+
+use App\Database\ConnectionFactory;
+use PDO;
+
+final class TestDatabase
+{
+    public static function create(): PDO
+    {
+        $dbName = getenv('DB_TEST_NAME') ?: (getenv('DB_NAME') ?: 'galaxyforge');
+        return ConnectionFactory::create($dbName);
+    }
+
+    public static function reset(PDO $pdo): void
+    {
+        $tables = [
+            'user_permission_overrides',
+            'user_roles',
+            'role_permissions',
+            'permissions',
+            'roles',
+            'build_jobs',
+            'planet_buildings',
+            'planets',
+            'users',
+        ];
+        foreach ($tables as $table) {
+            $pdo->exec("DROP TABLE IF EXISTS {$table} CASCADE");
+        }
+
+        $migration = __DIR__ . '/../../db/migrations/001_init.sql';
+        $sql = file_get_contents($migration);
+        if ($sql === false) {
+            throw new \RuntimeException('Migration nicht lesbar.');
+        }
+        $pdo->exec($sql);
+    }
+
+    public static function seedMinimal(PDO $pdo): array
+    {
+        $pdo->exec("INSERT INTO roles (key, name) VALUES ('player', 'Spieler')");
+        $pdo->exec("INSERT INTO roles (key, name) VALUES ('admin', 'Admin')");
+
+        $pdo->exec("INSERT INTO permissions (key, module, description) VALUES ('planet.public.view', 'planet', 'Planet ansehen')");
+        $pdo->exec("INSERT INTO permissions (key, module, description) VALUES ('planet.admin.generate', 'planet', 'Planeten generieren')");
+
+        $pdo->exec("INSERT INTO role_permissions (role_id, permission_id)
+            SELECT r.id, p.id FROM roles r JOIN permissions p ON r.key = 'player' AND p.key = 'planet.public.view'");
+
+        $pdo->exec("INSERT INTO users (username, race_key) VALUES ('tester', 'human')");
+        $userId = (int)$pdo->query("SELECT id FROM users WHERE username = 'tester'")->fetchColumn();
+
+        $pdo->exec("INSERT INTO user_roles (user_id, role_id)
+            SELECT {$userId}, r.id FROM roles r WHERE r.key = 'player'");
+
+        return ['user_id' => $userId];
+    }
+}
diff --git a/server/tests/Unit/MultiplierTest.php b/server/tests/Unit/MultiplierTest.php
new file mode 100644
index 0000000..c2767ce
--- /dev/null
+++ b/server/tests/Unit/MultiplierTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit;
+
+use App\Module\Economy\Service\EconomyService;
+use PHPUnit\Framework\TestCase;
+
+final class MultiplierTest extends TestCase
+{
+    public function testMultiplierChain(): void
+    {
+        $result = EconomyService::multiplyBonuses([0.10, -0.15, 0.10, 0.02]);
+        self::assertEquals(1.04907, $result, '', 0.0001);
+    }
+}
diff --git a/server/tests/Unit/PlanetGeneratorTest.php b/server/tests/Unit/PlanetGeneratorTest.php
new file mode 100644
index 0000000..964784c
--- /dev/null
+++ b/server/tests/Unit/PlanetGeneratorTest.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit;
+
+use App\Config\ConfigLoader;
+use App\Config\ConfigValidator;
+use App\Module\PlanetGenerator\Service\PlanetGenerator;
+use PHPUnit\Framework\TestCase;
+
+final class PlanetGeneratorTest extends TestCase
+{
+    public function testIceConstraintsAndScore(): void
+    {
+        $loader = new ConfigLoader(new ConfigValidator(), dirname(__DIR__, 3) . '/config');
+        $generator = new PlanetGenerator($loader);
+
+        $result = $generator->generate('ice', 'normal', 1234);
+        $mods = $result['modifiers'];
+
+        self::assertGreaterThanOrEqual(0.5, $mods['water']);
+        self::assertLessThanOrEqual(-0.6, $mods['energy']);
+        self::assertGreaterThanOrEqual(-80, $result['temperature_c']);
+        self::assertLessThanOrEqual(-10, $result['temperature_c']);
+
+        $config = $loader->planetClasses();
+        $target = (float)$config['tiers']['normal']['target_score'];
+        $epsilon = (float)$config['tiers']['normal']['epsilon'];
+        $score = $generator->calculateScore($mods);
+
+        self::assertEquals($target, $score, '', $epsilon);
+    }
+}
diff --git a/server/tests/Unit/QueueSlotsTest.php b/server/tests/Unit/QueueSlotsTest.php
new file mode 100644
index 0000000..bf245c0
--- /dev/null
+++ b/server/tests/Unit/QueueSlotsTest.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit;
+
+use App\Config\ConfigLoader;
+use App\Config\ConfigValidator;
+use App\Module\Blueprints\Service\BlueprintService;
+use App\Module\BuildQueue\Service\BuildQueueService;
+use App\Shared\Clock\FixedTimeProvider;
+use PHPUnit\Framework\TestCase;
+
+final class QueueSlotsTest extends TestCase
+{
+    public function testQueueSlotsGrowWithBuildCenter(): void
+    {
+        $pdo = new \PDO('sqlite::memory:');
+        $loader = new ConfigLoader(new ConfigValidator(), dirname(__DIR__, 3) . '/config');
+        $blueprints = new BlueprintService($loader);
+        $service = new BuildQueueService($pdo, $blueprints, new FixedTimeProvider(new \DateTimeImmutable('2026-02-03 00:00:00')));
+
+        $buildings = [
+            'build_center' => ['count' => 2, 'level' => 0],
+        ];
+
+        $slots = $service->calculateQueueSlots($buildings, 0);
+        self::assertSame(2, $slots);
+    }
+}
diff --git a/server/tests/bootstrap.php b/server/tests/bootstrap.php
new file mode 100644
index 0000000..2f5d7f6
--- /dev/null
+++ b/server/tests/bootstrap.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$root = dirname(__DIR__, 1);
+$repoRoot = dirname($root, 1);
+
+if (file_exists($repoRoot . '/.env')) {
+    $dotenv = Dotenv\Dotenv::createImmutable($repoRoot);
+    $dotenv->safeLoad();
+}
+
+if (!getenv('APP_ENV')) {
+    putenv('APP_ENV=test');
+}
+if (!getenv('DEV_MODE')) {
+    putenv('DEV_MODE=1');
+}
diff --git a/web/desktop/public/api/index.php b/web/desktop/public/api/index.php
new file mode 100644
index 0000000..7e72499
--- /dev/null
+++ b/web/desktop/public/api/index.php
@@ -0,0 +1,5 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../../../../server/public/index.php';
diff --git a/web/desktop/public/assets/ui.js b/web/desktop/public/assets/ui.js
index 98bff62..05b23cb 100644
--- a/web/desktop/public/assets/ui.js
+++ b/web/desktop/public/assets/ui.js
@@ -118,4 +118,88 @@
       if(b.dataset.alertpulse === pulse) b.classList.add("is-selected");
     });
   });
-})();
\ No newline at end of file
+
+  function formatNumber(val){
+    const num = Number.isFinite(val) ? val : 0;
+    return Math.round(num).toLocaleString("de-DE");
+  }
+
+  const resourceMap = {
+    "Metall": "metal",
+    "Kristall": "crystals",
+    "Deuterium": "deuterium",
+    "Energie": "energy"
+  };
+
+  function updateResourceBar(state){
+    const stats = document.querySelectorAll(".resource-row .stat");
+    stats.forEach((stat)=>{
+      const label = stat.querySelector(".stat-k")?.textContent?.trim();
+      const key = resourceMap[label];
+      if(!key) return;
+      const value = state?.resources?.[key];
+      if(typeof value !== "number") return;
+      const valueEl = stat.querySelector(".stat-v");
+      if(!valueEl) return;
+      const dot = valueEl.querySelector(".dot");
+      const display = key === "energy" ? Math.round(value) : Math.floor(value);
+      const prefix = key === "energy" && display >= 0 ? "+" : "";
+      valueEl.textContent = "";
+      if(dot) valueEl.appendChild(dot);
+      valueEl.appendChild(document.createTextNode(` ${prefix}${formatNumber(display)}`));
+    });
+  }
+
+  async function fetchState(){
+    try{
+      const res = await fetch("/api/state");
+      if(!res.ok) return null;
+      return await res.json();
+    }catch(e){
+      return null;
+    }
+  }
+
+  async function refreshState(){
+    const state = await fetchState();
+    if(state) updateResourceBar(state);
+  }
+
+  function ensureBuildButton(){
+    const content = document.getElementById("content");
+    if(!content || document.getElementById("buildOreMine")) return;
+    const wrap = document.createElement("div");
+    wrap.className = "actions";
+    const btn = document.createElement("button");
+    btn.className = "btn btn-primary";
+    btn.id = "buildOreMine";
+    btn.type = "button";
+    btn.textContent = "Erzmine bauen";
+    btn.addEventListener("click", async ()=>{
+      try{
+        const res = await fetch("/api/build/start", {
+          method: "POST",
+          headers: {"Content-Type":"application/json"},
+          body: JSON.stringify({building_key:"ore_mine", amount:1})
+        });
+        const data = await res.json();
+        if(res.ok){
+          toast("success","Bau gestartet","Erzmine in Queue gelegt");
+          updateResourceBar({resources: data.resources});
+        }else{
+          toast("error","Bau fehlgeschlagen", data.message || "Aktion nicht möglich");
+        }
+      }catch(e){
+        toast("error","Netzwerk","API nicht erreichbar");
+      }
+    });
+    wrap.appendChild(btn);
+    content.appendChild(wrap);
+  }
+
+  document.addEventListener("DOMContentLoaded", ()=>{
+    refreshState();
+    ensureBuildButton();
+    setInterval(refreshState, 30000);
+  });
+})();
diff --git a/web/mobile/public/api/index.php b/web/mobile/public/api/index.php
new file mode 100644
index 0000000..7e72499
--- /dev/null
+++ b/web/mobile/public/api/index.php
@@ -0,0 +1,5 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../../../../server/public/index.php';
diff --git a/web/mobile/public/assets/ui.js b/web/mobile/public/assets/ui.js
index 98bff62..05b23cb 100644
--- a/web/mobile/public/assets/ui.js
+++ b/web/mobile/public/assets/ui.js
@@ -118,4 +118,88 @@
       if(b.dataset.alertpulse === pulse) b.classList.add("is-selected");
     });
   });
-})();
\ No newline at end of file
+
+  function formatNumber(val){
+    const num = Number.isFinite(val) ? val : 0;
+    return Math.round(num).toLocaleString("de-DE");
+  }
+
+  const resourceMap = {
+    "Metall": "metal",
+    "Kristall": "crystals",
+    "Deuterium": "deuterium",
+    "Energie": "energy"
+  };
+
+  function updateResourceBar(state){
+    const stats = document.querySelectorAll(".resource-row .stat");
+    stats.forEach((stat)=>{
+      const label = stat.querySelector(".stat-k")?.textContent?.trim();
+      const key = resourceMap[label];
+      if(!key) return;
+      const value = state?.resources?.[key];
+      if(typeof value !== "number") return;
+      const valueEl = stat.querySelector(".stat-v");
+      if(!valueEl) return;
+      const dot = valueEl.querySelector(".dot");
+      const display = key === "energy" ? Math.round(value) : Math.floor(value);
+      const prefix = key === "energy" && display >= 0 ? "+" : "";
+      valueEl.textContent = "";
+      if(dot) valueEl.appendChild(dot);
+      valueEl.appendChild(document.createTextNode(` ${prefix}${formatNumber(display)}`));
+    });
+  }
+
+  async function fetchState(){
+    try{
+      const res = await fetch("/api/state");
+      if(!res.ok) return null;
+      return await res.json();
+    }catch(e){
+      return null;
+    }
+  }
+
+  async function refreshState(){
+    const state = await fetchState();
+    if(state) updateResourceBar(state);
+  }
+
+  function ensureBuildButton(){
+    const content = document.getElementById("content");
+    if(!content || document.getElementById("buildOreMine")) return;
+    const wrap = document.createElement("div");
+    wrap.className = "actions";
+    const btn = document.createElement("button");
+    btn.className = "btn btn-primary";
+    btn.id = "buildOreMine";
+    btn.type = "button";
+    btn.textContent = "Erzmine bauen";
+    btn.addEventListener("click", async ()=>{
+      try{
+        const res = await fetch("/api/build/start", {
+          method: "POST",
+          headers: {"Content-Type":"application/json"},
+          body: JSON.stringify({building_key:"ore_mine", amount:1})
+        });
+        const data = await res.json();
+        if(res.ok){
+          toast("success","Bau gestartet","Erzmine in Queue gelegt");
+          updateResourceBar({resources: data.resources});
+        }else{
+          toast("error","Bau fehlgeschlagen", data.message || "Aktion nicht möglich");
+        }
+      }catch(e){
+        toast("error","Netzwerk","API nicht erreichbar");
+      }
+    });
+    wrap.appendChild(btn);
+    content.appendChild(wrap);
+  }
+
+  document.addEventListener("DOMContentLoaded", ()=>{
+    refreshState();
+    ensureBuildButton();
+    setInterval(refreshState, 30000);
+  });
+})();