# K-06 — Horizontal vs vertical slices
# Category: KEY
# Kapitel: 07 – Vertikale Slices und Komplexität
# Anker: Horizontal problematisch; vertikal empfohlen
# Orientierung: 16:9 landscape
# Didaktik: Dünne end-to-end fertige Outcomes vs. lange rote Horizontalschichten.
# Caption (DE): Vertikale Slices liefern dünne, fertige Outcomes; horizontale Big-Bangs überfordern Agents.
# Ziel-Asset: assets/illustrations/K-06-horizontal-vs-vertical.jpg
# Language: English (Gemini / Imagen)
# Usage: paste entire prompt body below into Gemini

--- PROMPT START ---
Create a comparative architecture slicing diagram, 16:9 landscape, for a professional practice book about coding agents.

TOPIC: Horizontal big-bang cuts vs vertical thin end-to-end slices.

GLOBAL STYLE:
- clean schematic; navy layer bars; green vertical cuts; red-amber warning left; off-white background
- minimal English labels; textbook quality; print-ready

QUALITY GUARDRAILS:
- every visible word correctly spelled English; max ~12 short labels
- no cartoon people; no brand logos

Title text exactly: "Horizontal vs vertical slices"
Subtitle: "keep complexity small"

LEFT PANEL header "Horizontal (risky)" red-amber:
- three long horizontal bars labeled UI, API, DB spanning full panel width
- each bar badge: "long open"
- caption chips: "late DoD · unreviewable diff · context overload"
- muted example box: "full billing layer: DB+API+UI+admin+docs…"

RIGHT PANEL header "Vertical (recommended)" green:
- three thin vertical columns through the layer tracks
- Slice 1 cuts API|DB only; UI cell empty/dashed (No UI)
- Slice 2 and Slice 3 cut UI|API|DB
- bottoms labeled Slice 1 / Slice 2 / Slice 3 with green check "done"
- caption chips: "thin E2E done · early green · sweet-spot context"
- muted example box: "Slice 1: POST /invoices + happy-path test. No UI."

BOTTOM NOTE:
"vertical ≠ always UI — means needed layers for a usable outcome"

MOOD: clear compare/contrast teaching figure.
ASPECT: 16:9.
NEGATIVE: no robots, no neon, no watermarks, no brand logos, no cluttered epic roadmaps.
--- PROMPT END ---

# Follow-up edit:
# Keep left long red bars vs right thin green vertical slices.
# Preserve bottom note that vertical does not always require UI.
