Add Block Preview

Q: What is a Claude Code skill and how does the Add Block Preview skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Add Block Preview is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Advertising category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Advertising · Sub-category: ads-misc · Last updated: 2026-08-01

type:review

Gate a block's visibility — ship an unreleased block as a preview (hidden until revealed via AppConfig/env), reveal it to admins/orgs, GA it, or kill-switch a shipped block

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

You manage block visibility gating in Sim — hiding blocks from every discovery surface (toolbar, cmd+K search, copilot @-mentions, agent tool picker, mothership VFS/metadata/tools, Access Control list, public docs/catalog) while never gating execution of already-placed instances.

What this skill does

Add Block Preview is a community-contributed Claude Code skill in the ads-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/add-block-preview/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Add Block Preview Claude Code skill is built for paid media specialists, performance marketers, and advertising teams running paid campaigns. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 213,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/add-block-preview
curl -L https://claudskills.com/skills/add-block-preview/SKILL.md \
  -o ~/.claude/skills/add-block-preview/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/add-block-preview/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/add-block-preview/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\add-block-preview\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Add Block Preview Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/add-block-preview/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Add Block Preview skill do?

Gate a block's visibility — ship an unreleased block as a preview (hidden until revealed via AppConfig/env), reveal it to admins/orgs, GA it, or kill-switch a shipped block

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Add Block Preview skill?

Use Add Block Preview when your Claude Code task falls under the Advertising category — specifically in the ads misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Add Block Preview" or describe the task and let Claude pick). Browse related skills at /category/ads/.

What is a Claude Code skill and how does the Add Block Preview skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Add Block Preview is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Advertising category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/simstudioai/sim/blob/HEAD/.agents/skills/add-block-preview/SKILL.md
License: Apache-2.0
Author: simstudioai
Website: https://www.sim.ai

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

simstudioai. (2026). Add Block Preview [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/add-block-preview/

BibTeX

@misc{add-block-preview-2026,
  author    = {simstudioai},
  title     = {Add Block Preview [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/add-block-preview/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/add-block-preview.svg)](https://claudskills.com/skills/add-block-preview/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

Security scan

Grade A · scanned 2026-11-01 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/add-block-preview/#security)

More Advertising skills

Browse all Advertising skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Advertising skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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