diff --git a/CLAUDE.md b/CLAUDE.md
index addd311..417d13b 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -37,11 +37,13 @@ build/                  # Generated output (gitignored)
 ## Build Commands
 
 Unified per-course pattern: `make <target>-<course>`. Group targets without
-suffix run for all courses.
+suffix run for all courses. Single dev server serves all courses.
 
 ```bash
-# Per-course (replace <c> with course id: 223015b, 223015c, dhbw)
-make dev-<c>         # Live server (HMR) on per-course port
+# Dev (all courses, single port)
+make dev             # Live server (HMR), port 1312
+
+# Per-course build/deploy (replace <c> with course id: 223015b, 223015c, dhbw)
 make build-<c>       # Build HTML + PDF
 make html-<c>        # HTML only
 make pdf-<c>         # PDF only
@@ -49,17 +51,14 @@ make klausur-<c>     # Extract klausur slides (HdM only)
 make deploy-<c>      # Build + deploy single course (ASK FIRST!)
 
 # All courses
-make dev             # Combined dev server (port 1312, all courses)
 make build           # Build everything
 make html / pdf      # HTML / PDF only
 make klausur         # Extract klausur (HdM courses only)
 make deploy          # Deploy everything (ASK FIRST!)
 ```
 
-Per-course ports: `223015b` → 1313, `223015c` → 1314, `dhbw` → 1315.
-
 **Adding a new course:** add id to `COURSES` in Makefile + define `<id>_NAME`,
-`<id>_KAPITEL`, `<id>_DEPLOY`, `<id>_PORT`, `<id>_KLAUSUR`. No new targets needed.
+`<id>_KAPITEL`, `<id>_DEPLOY`, `<id>_KLAUSUR`. No new targets needed.
 
 ## Nix Flake Commands
 
diff --git a/Makefile b/Makefile
index ef23cfc..0c159f7 100644
--- a/Makefile
+++ b/Makefile
@@ -15,19 +15,16 @@ DEPLOY_HOST = tengo@tuttle.uberspace.de
 223015b_NAME    = Dateiformate, Schnittstellen, Speichermedien
 223015b_KAPITEL = 00-intro 01-grundlagen-text-audio 02-bild-audio-video 03-speichermedien-schnittstellen 04-distribution-apis-zukunft 05-vertiefung-offene-fragen klausurfolien klausurfragen
 223015b_DEPLOY  = /home/tengo/html/hdm/223015b
-223015b_PORT    = 1313
 223015b_KLAUSUR = 1
 
 223015c_NAME    = Internettechnologien
 223015c_KAPITEL = 01-geschichte-grundlagen-html 02-netzwerke-protokolle-css 03-interaktivitaet-javascript klausurfolien klausurfragen
 223015c_DEPLOY  = /home/tengo/html/hdm/223015c
-223015c_PORT    = 1314
 223015c_KLAUSUR = 1
 
 dhbw_NAME    = Technik I – Grundlagen IT
 dhbw_KAPITEL = 01_web_eng 02_css_extended 03_nodejs_basics 04_nodejs_advanced 05_testing 06_typescript 07_docker 08_best_practices
 dhbw_DEPLOY  = /home/tengo/html/dhbw
-dhbw_PORT    = 1315
 dhbw_KLAUSUR =
 
 # Courses with klausur extraction enabled
@@ -43,8 +40,10 @@ help:
 	@echo "Courses:"
 	@for c in $(COURSES); do echo "  $$c"; done
 	@echo ""
-	@echo "Per-course (replace <c> with course id):"
-	@echo "  make dev-<c>        Live server (HMR)"
+	@echo "Dev:"
+	@echo "  make dev            Live server, all courses (port 1312)"
+	@echo ""
+	@echo "Per-course build/deploy (replace <c> with course id):"
 	@echo "  make build-<c>      Build HTML + PDF"
 	@echo "  make html-<c>       Build HTML only"
 	@echo "  make pdf-<c>        Build PDF only"
@@ -52,7 +51,6 @@ help:
 	@echo "  make deploy-<c>     Build + deploy"
 	@echo ""
 	@echo "All courses:"
-	@echo "  make dev            Combined dev server (port 1312, all courses)"
 	@echo "  make build          Build everything"
 	@echo "  make html / pdf     HTML / PDF only"
 	@echo "  make klausur        Extract klausur (HdM courses)"
@@ -73,12 +71,9 @@ build/.exists:
 	@touch $@
 
 # -----------------------------------------------------------------------------
-# Pattern rules: dev-<c>, build-<c>, html-<c>, pdf-<c>, klausur-<c>, deploy-<c>
+# Pattern rules: build-<c>, html-<c>, pdf-<c>, klausur-<c>, deploy-<c>
 # Per-course config read via $($*_VAR)
 # -----------------------------------------------------------------------------
-dev-%:
-	@./scripts/dev-server.sh $* $($*_PORT)
-
 build-%: build/.exists
 	@echo "Building $*..."
 	@mkdir -p build/$*