Ad Creative Maker

Design static ad creatives for social media ads, display banners, and digital advertising campaigns. Build production-ready ads via the design subagent and present them as iframes on the canvas.

When to Use

• User needs ad creatives for Facebook, Instagram, LinkedIn, Google Display, or TikTok
• User wants banner ads or display advertising assets
• User needs multiple ad variants for A/B testing
• User wants ad copy and visual design together
• User wants to iterate on ad creative based on performance data

When NOT to Use

• Organic social media content (use content-machine skill)
• Video ads or animated content (use storyboard skill for planning)
• Full landing pages (use the

  artifacts

  skill)

Methodology

Step 1: Creative Brief

Gather these inputs:

• Platform & Format: Which platform? (Google Ads, Meta, LinkedIn, TikTok, X/Twitter) Which format? (Search RSAs, feed, stories, display)
• Objective: Awareness, consideration, or conversion?
• Target audience: Who will see this ad? What stage of awareness? (Problem-aware, solution-aware, product-aware)
• Key message: Single most important thing to communicate
• CTA: What action should the viewer take?
• Brand assets: Logo, colors, fonts, product images
• Performance data (if iterating): Which headlines/descriptions are performing best/worst? What angles have been tested?

Step 2: Platform Specifications (2025-2026)

Enforce these programmatically. Count characters in code, don't eyeball.

Meta (Facebook/Instagram) — Visual

Placement	Dimensions	Safe zone (keep critical elements inside)
Feed (square)	1080×1080	~100px margin all edges
Feed (portrait) — preferred	1080×1350 (4:5)	4:5 outperforms 1:1 on CTR; mobile-first
Stories	1080×1920	Top 14% (270px) + bottom 20% (380px) = dead zones
Reels	1080×1920	Top 14% + bottom 35% (670px) — like/comment/share UI is taller
Universal safe core	1010×1280 centered	Design inside this box → works everywhere

Upload at 2x pixel density (2160×2160 for a 1080 slot) for Retina sharpness. JPG/PNG, 30MB max.

20% text rule: officially removed — Meta no longer rejects text-heavy images, but the delivery algorithm still quietly throttles them. Keep text minimal; move details to primary text.

Meta — Text

Element	Limit	Notes
Primary text	125 chars visible feed / ~72 chars visible in Reels	Write for 72
Headline	40 chars rec	Below image
Description	30 chars rec	Often hidden on mobile

Google Ads

Responsive Search Ads (RSA):

Element	Limit	Qty	Rule
Headlines	30 chars	up to 15, min 3	Each must work standalone — Google combines randomly
Descriptions	90 chars	up to 4, min 2	Complement, don't repeat headlines
Display path	15 chars × 2	—

Pin sparingly — pinning drops Ad Strength and limits ML optimization. Supply ≥5 headlines + ≥5 descriptions for ~10% more conversions at same CPA.

Responsive Display Ads (RDA) — default Display format:

Asset	Spec	Qty
Landscape image	1200×628 (1.91:1)	up to 15 total
Square image	1200×1200 (1:1)	required
Portrait image	1200×1500 (4:5)	optional, expands inventory
Logo square	1200×1200 (128 min)	up to 5
Logo wide	1200×300 (4:1)	optional
Short headline	30 chars	up to 5
Long headline	90 chars	1
Description	90 chars	up to 5

All images ≤5MB, JPG/PNG only (no GIF in RDA). Keep file size <150KB for fast load.

Highest-inventory static sizes (if uploading fixed banners): 300×250 (medium rectangle — most served, works desktop+mobile), 728×90 (leaderboard), 320×50 (mobile banner), 300×600 (half-page — premium CPM, high CTR), 336×280.

Performance Max: same asset pool serves across Search/Display/YouTube/Gmail/Maps/Discover. Upload all 3 image ratios + a YouTube video (≤30s) or Google auto-generates one — don't let it.

LinkedIn Ads

Element	Limit
Intro text	150 chars rec (600 max)
Headline	70 chars rec (200 max)
Image	1200×627 (1.91:1) or 1200×1200

TikTok Ads

1080×1920, 9:16. Ad text: 100 char max (~80 visible). For Spark Ads (boosting organic creator posts), get the authorization code from the creator — Spark Ads outperform In-Feed Ads on engagement because they retain organic engagement metrics.

Step 3: Define Angles

Before writing individual copy, establish 3-5 distinct angles — different reasons someone would click:

Category	Example
Pain point	"Stop wasting time on X"
Outcome	"Achieve Y in Z days"
Social proof	"Join 10,000+ teams who..."
Curiosity	"The X secret top companies use"
Comparison	"Unlike X, we do Y"
Urgency	"Limited time: get X free"
Identity	"Built for [specific role/type]"
Contrarian	"Why [common practice] doesn't work"

Step 4: Design Principles

Visual hierarchy (read order): 1) Hero element → 2) Benefit/offer → 3) CTA → 4) Logo (corner, small).

Rules:

• <20 words total on the image — move everything else to primary text
• One focal point. If the eye doesn't know where to land in 0.5s, it's too busy.
• High contrast text/background — verify WCAG 4.5:1 minimum (use

  chroma.contrast()

  if building programmatically)
• CTA button: contrasting color, rounded corners, verb-first ("Get the guide" not "Learn more")
• Faces looking toward the CTA increase click-through (gaze cueing)
• Keep file <150KB for display; Meta accepts up to 30MB but slow loads hurt auction performance

Step 5: Generate Variations

For each angle, generate multiple variations. Vary:

• Word choice — synonyms, active vs. passive
• Specificity — numbers vs. general claims ("Cut reporting time 75%" beats "Save time")
• Tone — direct vs. question vs. command
• Structure — short punch vs. full benefit statement

Strong headlines: Specific over vague. Benefits over features. Active voice. Include numbers when possible ("3x faster," "in 5 minutes").

Strong descriptions: Complement headlines, don't repeat them. Add proof points, handle objections ("No credit card required"), reinforce CTAs.

Step 6: Validate and Deliver

Before presenting, check every piece against character limits. Flag anything over and provide a trimmed alternative. Include character counts.

## Angle: [Pain Point — Manual Reporting]

### Headlines (30 char max)

1. "Stop Building Reports by Hand" (29)
2. "Automate Your Weekly Reports" (28)
3. "Reports in 5 Min, Not 5 Hrs" (27)

### Descriptions (90 char max)

1. "Marketing teams save 10+ hours/week with automated reporting. Start free." (73)
2. "Connect your data sources once. Get automated reports forever. No code required." (80)

Step 7: Build Ad Creatives — Design Subagents + Canvas

Launch a separate design subagent for each variation in parallel using

startAsyncSubagent

. Each subagent builds one ad variation as a standalone HTML page. This is much faster than building them sequentially.

Canvas Layout

Default to square iframes (1080x1080) for ad creatives so they fully fit on the canvas without clipping. The HTML inside uses

100vw

/

100vh

to fill the iframe regardless of size. Group by angle in rows, with a landing page iframe alongside:

x=0,    y=0:    [Label: "Angle 1: [Pain Point] — Ad"]
x=0,    y=40:   [Iframe: angle1-ad]              (1080x1080)

x=1200, y=0:    [Label: "Angle 1: [Pain Point] — Landing Page"]
x=1200, y=40:   [Iframe: angle1-landing]         (1280x720)

x=0,    y=1220: [Label: "Angle 2: [Social Proof] — Ad"]
x=0,    y=1260: [Iframe: angle2-ad]              (1080x1080)

x=1200, y=1220: [Label: "Angle 2: [Social Proof] — Landing Page"]
x=1200, y=1260: [Iframe: angle2-landing]         (1280x720)

x=0,    y=2440: [Label: "Angle 3: [Outcome] — Ad"]
x=0,    y=2480: [Iframe: angle3-ad]              (1080x1080)

x=1200, y=2440: [Label: "Angle 3: [Outcome] — Landing Page"]
x=1200, y=2480: [Iframe: angle3-landing]         (1280x720)

Parallel design subagent delegation

Launch all variations simultaneously. Each subagent gets one ad + its landing page. Use

startAsyncSubagent

for each, then

waitForBackgroundTasks

to collect results.

// Launch all 3 angles in parallel — each subagent builds one angle's assets
await startAsyncSubagent({
    task: `Create a production-ready ad creative and matching landing page for the following angle.

Brand: [name]
Colors: Primary [hex], Secondary [hex], Accent [hex]
Fonts: [display font], [body font] (load from Google Fonts)
Logo: [path or description]
User's stated style preferences: [include any specific preferences the user mentioned]

**Angle: [Pain Point]**
- Headline: "[headline text]"
- CTA: "[cta text]"

Build these files:

1. **angle1-ad.html** (square, 1:1) — the actual ad creative
2. **angle1-landing.html** (desktop, 1280px wide) — a mock marketing landing page this ad would link to. Include hero section, value props, social proof, and CTA. This should look like a real product page, not a wireframe.

**CRITICAL — viewport-relative sizing for iframes:**
The ad HTML will be embedded in an iframe on a canvas. The content MUST fill the iframe exactly — no overflow, no scrollbars, no clipping. Use this CSS pattern:

\`\`\`css
html, body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
.ad-container {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  /* use vw/vh for all internal sizing too */
}
/* Use vw for font sizes so they scale: e.g., font-size: 5vw; */
/* Use vw/vh for padding/margins: e.g., padding: 3vw; */
\`\`\`

This ensures the ad looks correct at any iframe size — 1080x1080 on canvas, or any other size. **Never use fixed pixel dimensions** (e.g., width: 1080px) for the ad container.

Design rules:
- Each ad must look like a real ad you'd see in your feed — polished, professional, production-ready
- **No gradients** — use flat colors, solid backgrounds, clean color blocking
- Styling must match the brand concept and any specific preferences the user stated (e.g., if they said "minimal" don't make it busy, if they said "bold" don't make it subtle)
- <20 words on the ad image. Visual hierarchy: hero element → benefit → CTA → logo (corner, small)
- High contrast text/background (WCAG 4.5:1 minimum)
- CTA button: contrasting color, rounded corners, verb-first
- Use image generation for hero imagery if no product photo is provided
- Use the brand's actual colors and fonts throughout — the landing page should feel like a continuation of the ad`,
    specialization: "DESIGN",
    relevantFiles: []
});

// Repeat for Angle 2 and Angle 3 in the same message — all 3 launch simultaneously
await startAsyncSubagent({
    task: `... Angle 2: [Social Proof] ...`,
    specialization: "DESIGN",
    relevantFiles: []
});

await startAsyncSubagent({
    task: `... Angle 3: [Outcome] ...`,
    specialization: "DESIGN",
    relevantFiles: []
});

// Wait for all 3 to complete
await waitForBackgroundTasks();

After all subagents finish, embed each page as an iframe on the canvas using

apply_canvas_actions

. Tell the user what was created and offer to focus the viewport.

Styling rules — no exceptions

• Viewport-relative sizing. All ad HTML must use

  100vw

  /

  100vh

  for the container and

  vw

  -based font sizes/padding. Never fixed pixel dimensions for the ad container. The ad must fill whatever iframe it's placed in without clipping or scrollbars.
• No gradients. Use flat, solid colors. Color blocking with the brand palette is fine; linear-gradient/radial-gradient is not.
• Match the concept. If the user said "minimalist," don't add decorative elements. If they said "bold and energetic," don't make it muted. Re-read the user's stated preferences before delegating.
• Consistency across angles. All 3 angles should feel like they're from the same brand — same fonts, same color usage patterns, same visual language. The angles differ in message, not in design system.
• Landing page = real page. The mock landing page should look like where the ad actually leads — hero section echoing the ad's message, value props, testimonials/social proof section, and a CTA. Not a wireframe, not a placeholder.

Export

The user can screenshot each iframe directly, or open the HTML files in a browser at the desired export size. Since the ads use

vw

/

vh

sizing, they'll adapt to any viewport. For batch export at specific dimensions:

npx playwright screenshot angle1-ad.html --viewport-size=1080,1080

.

Iterating from Performance Data

When the user provides performance data:

1. Analyze winners: Identify winning themes, structures, word patterns, and character utilization in top performers (by CTR, conversion rate, or ROAS)
2. Analyze losers: Identify themes that fall flat and common patterns in underperformers
3. Generate new variations: Double down on winning themes, extend winning angles, test 1-2 new unexplored angles, avoid patterns from underperformers
4. Document the iteration: Track what was learned, what's being tested, and what angles were retired

Research Before Writing

Use

webSearch

to find examples of top-performing ads in the user's vertical. Search for ad breakdowns, swipe files, and case studies — e.g.

webSearch("[industry] top performing Facebook ads 2026")

or

webSearch("[industry] TikTok ad examples")

. The TikTok Creative Center and Meta Ad Library are useful reference sites but require direct browser interaction to filter; web search can surface articles and analyses that reference their data. Reverse-engineer: what hook, what angle, what visual pattern. Don't guess what works — look it up.

Common Mistakes

• Writing RSA headlines that only work in sequence (Google combines them randomly — each must stand alone)
• Ignoring the Reels 72-char visible limit (writing for the 125-char feed limit → truncated on Reels)
• All variations = same angle reworded (vary the psychology, not the synonyms)
• Placing text in the bottom 35% of a 9:16 ad (covered by UI on every platform)
• Retiring creative before 1,000+ impressions per variant
• Letting Performance Max auto-generate video — always supply your own

Limitations

• Cannot run or measure ad campaigns
• Cannot access ad platform analytics
• Cannot create animated or video ads
• Image generation requires the media-generation skill