sticker-creator

name	sticker-creator
description	Create die-cut sticker style cards via Nano Banana Pro. Use for social media cards, earnings cards, brand stickers, announcement cards, and any content formatted as a bold, clean sticker with a thick white border.

Sticker Creator

Generates die-cut sticker style cards using Nano Banana Pro. Output is a 1080×1080 PNG.

---

Tools

Tool	Purpose
nano-banana-pro skill	Image generation via Gemini

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Core Design Language

These rules apply to every sticker unless explicitly overridden:

Element	Spec
Canvas	1080×1080 px, aspect ratio 1:1
Orientation	Perfectly upright. 0° rotation. No tilt. No skew. Ever.
Border	Thick white die-cut border (~16px), soft drop shadow
Corner radius	Large rounded corners (~32px)
Background	Dark navy #0f172a (default) — overridable
Primary text	Bold white, large, top-left
Accent color	Teal/cyan #22d3ee for key values (default) — overridable
Callout box	Dark rounded pill/box for "Watch:", "Key:", or annotation text
Wordmark	"Bloom" in muted gray, bottom-right
Feel	Financial data card — confident, clean, minimal decoration

Always include this verbatim in every Nano Banana prompt:

perfectly upright, zero rotation, no tilt, no skew, card sits flat and square

---

Step 1 — Resolve GEMINI_API_KEY

GEMINI_API_KEY=$(python3 -c "
import json, os
d = json.load(open(os.path.expanduser('~/.openclaw/openclaw.json')))
print(
  d.get('skills',{}).get('entries',{}).get('nano-banana-pro',{}).get('apiKey','')
  or d['env']['vars'].get('GEMINI_API_KEY','')
)" 2>/dev/null)
export GEMINI_API_KEY

---

Step 2 — Build the Prompt

Start from the appropriate template below, then customize for the content.

Financial / Earnings Card

Dark navy #0f172a background, die-cut sticker with thick white border and soft drop shadow,
large rounded corners, perfectly upright, zero rotation, no tilt, no skew, card sits flat and square.

Top-left: bold white ticker "$[TICKER]" in very large type.
Below ticker: "[Subtitle line]" in small muted gray text.

Center section:
- "Est. EPS: [value]" — label in white, value in teal/cyan bold
- "Est. Rev: [value]" — label in white, value in teal/cyan bold

Bottom: dark rounded box containing "Watch:" in teal bold followed by "[watch text]" in white.
Bottom-right: "Bloom" wordmark in muted gray.

Style: clean financial data card, no gradients, no decorative elements.

Announcement / General Card

Dark navy #0f172a background, die-cut sticker with thick white border and soft drop shadow,
large rounded corners, perfectly upright, zero rotation, no tilt, no skew, card sits flat and square.

Top: "[Headline]" in bold white, large type.
Center: "[Body text or key stat]" in [accent color] bold.
Bottom: dark rounded pill containing "[Callout text]" in white.
Bottom-right: "Bloom" wordmark in muted gray.

Style: clean, confident, minimal decoration.

Brand / Logo Sticker

[Background color] background, die-cut sticker with thick white border and soft drop shadow,
large rounded corners, perfectly upright, zero rotation, no tilt, no skew, card sits flat and square.

Center: "[Brand name or logo text]" in bold [color], very large.
[Optional tagline in small muted text below]

Style: clean brand mark, no gradients, no decorative elements.

---

Step 3 — Generate

OUTFILE="/tmp/sticker-[name]-$(date +%Y%m%d-%H%M%S).png"

uv run ~/clawd/skills/nano-banana-pro/scripts/generate_image.py \
  --prompt "[assembled prompt]" \
  --filename "$OUTFILE" \
  --resolution 2K

• Always use --resolution 2K for finals (crisp at 1080×1080)
• Do NOT pass --thinking — high times out, dynamic throws a parameter conflict; default works fine
• Output path: /tmp/sticker-[descriptive-name]-YYYYMMDD-HHMMSS.png
• exec timeout: 300s minimum — image generation at 2K takes 60–120s; use timeout=300, yieldMs=280000

---

Step 4 — Remove Background

After generation, strip the background so the sticker floats on transparency. Uses rembg via uv.

BGREMOVED="${OUTFILE%.png}-nobg.png"

uv run --with "rembg[cpu]" --with pillow python3 - "$OUTFILE" "$BGREMOVED" << 'EOF'
import sys
from rembg import remove
from PIL import Image

inp = Image.open(sys.argv[1]).convert("RGBA")
out = remove(inp)
out.save(sys.argv[2])
print(f"Background removed: {sys.argv[2]}")
EOF

• Output overwrites the variable: use $BGREMOVED (ends in -nobg.png) for all subsequent steps
• rembg downloads a ~170MB U2-Net model on first run — subsequent calls are fast (model cached)
• If the edge looks rough, regenerate with a cleaner Nano Banana prompt (more contrast between sticker and bg)

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Step 5 — Review & Iterate

After generation, show the image to the user. Common issues and fixes:

Issue	Fix
Card is tilted	Add "perfectly upright, zero rotation, no tilt, card sits flat and square" — Gemini interprets "sticker" as rotated; override explicitly
Text too small	Add "large bold text, high contrast, easy to read at a glance"
Colors wrong	Specify exact hex codes in the prompt
Border too thin	Add "very thick white border, prominent die-cut effect"
Too decorative	Add "no gradients, no textures, flat clean design"

If the first result is off, regenerate with a more explicit prompt — don't accept a tilted or messy card.

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Common Mistakes

1. Tilted output — must include "perfectly upright, zero rotation, no tilt, no skew, card sits flat and square" verbatim in every prompt. Non-negotiable.
2. Using --thinking flag — high times out, dynamic throws a parameter conflict. Omit the flag entirely; default quality is sufficient.
3. Using --resolution 1K for finals — always use 2K for anything that gets posted.
4. Vague prompts — specify hex colors, exact text, font weight. Don't leave it to interpretation.
5. PIL fallback — never fall back to PIL. If Nano Banana fails, report the failure.
6. Sending $OUTFILE instead of $BGREMOVED — always send the -nobg.png version after background removal. The raw generated file still has a solid background.