# K-03 — U-curve context performance
# QA-Note 2026-08-15: valley=Dumb zone only; Rot/LitM not in valley.
# Category: KEY
# Kapitel: 03 – Kontext ist König
# Anker: U-förmige Context-Performance; Sweet Spot; Dumb Zone
# Orientierung: 16:9 landscape
# Didaktik: Performance oft gut bei signalstarker, moderater Füllung; Abfall in der Mitte; leichte teure Erholung bei sehr hoher Füllung — kein Zielzustand. Prozentzahlen nicht als operative Labels.
# Caption (DE): Context-Performance ist oft U-förmig: Sweet Spot bei hohem Signal und geringem Rauschen, dann Dumb Zone — mehr ist nicht besser.
# Ziel-Asset: assets/illustrations/K-03-u-curve-context.jpg
# Language: English (Gemini / Imagen)
# Usage: paste entire prompt body below into Gemini

--- PROMPT START ---
Create a scientific chart-style educational infographic, 16:9 landscape, for a professional practice book about coding agents and context windows.

TOPIC: U-shaped / valley-shaped performance vs relative context fill — practice heuristic, not a law of nature.

GLOBAL STYLE:
- textbook data visualization; navy axes, teal curve, green sweet-spot, amber dumb zone, muted late recovery, red cost badge
- off-white background; minimal English labels; print-ready; high grayscale contrast

QUALITY GUARDRAILS:
- every visible word correctly spelled English; max ~12 short labels
- do NOT show percentage numbers on the chart (no ~10–20%, no >80%, no numeric axis ticks for fill %)
- zones are labeled by quality/symptoms, not by percentages
- no brand logos; no robot mascots

Title text exactly: "Context performance curve"
Subtitle small: "practice heuristic — not a natural constant"

AXES:
- X: "Relative context fill"
- Y: "Task performance"
- X-axis soft zone markers only (words, no %): "low–moderate" under the peak area, "very high" under the late recovery area — or omit numeric ticks entirely

CURVE shape:
- starts moderate-low near empty
- peaks high in the left-middle with green star label: "Sweet spot"
- declines into wide amber valley labeled: "Dumb zone"
- slight uptick near the far right labeled: "slight recovery (unreliable)"
- far-right red cost badge: "cost & latency explode"

THREE ZONE PANELS under chart (short bullets only):
A green "Sweet spot": "goal in view · surgical edits · low noise"
B amber "Dumb zone": "forgets DoD · fix cascades · noise grows"
C red-gray "Very high fill": "emergency only · not a goal · no buffer"

Footer small slate text: "Token counts vary by model & harness — manage fill and signal."
Optional one-line slate note: "Context rot and lost-in-the-middle are parallel mechanisms — not this valley."

MOOD: honest engineering chart, not marketing hockey stick.
ASPECT: 16:9 landscape.
NEGATIVE: no percentage numbers, no fake precise dataset points, no 3D pie charts, no robots, no neon, no watermarks, no brand logos.
--- PROMPT END ---

# Follow-up edit:
# Keep Sweet spot star, Dumb zone valley, slight late recovery, cost badge.
# Remove all percentage labels from chart, axes, and panels.
# Do not turn this into “more context = better”. Footer must keep heuristic disclaimer.
# Valley label is "Dumb zone" only — do not add context rot or lost-in-the-middle to the valley or Dumb-zone panel.
