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App Verification

Category: Engineering  ·  Sub-category: architecture  ·  Last updated:
Builds and maintains a product's own verification harness inside its repo, a verify CLI, a doctor command, per-worktree isolation, a feature map written from the user's point of view, seed data, and a reproduce-first bug handoff. Use when asked to "build a verification harness", "add a doctor command", "give agents a way to verify this app", "prove every feature still works", or "reproduce this bug report". For one-off browser probes against a fixed UI rule catalogue use ui-verification; for repo-wide module boundaries and lint guardrails use codebase-architecture.
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Builds, inside a product's own repository, the harness every agent uses to run that product and prove a claim about it: a verify CLI, a doctor command, an isolated instance per worktree, a feature map written from the user's point of view, seed data and test accounts, and a reproduce-first bug handoff. The harness lives in the target repo, not in this skill; this skill is what scaffolds and then maintains it, so every agent that opens that repo runs the app the same way instead of writing a throwaway script each session.

What this skill does

App Verification is a community-contributed Claude Code skill in the architecture sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/app-verification/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when asked to "build a verification harness", "add a doctor command", "give agents a way to verify this app", "prove every feature still works", or "reproduce this bug report". For one-off browser probes against a fixed UI rule catalogue use ui-verification; for repo-wide module boundaries and lint guardrails use codebase-architecture.

Who uses this skill

The App Verification Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ 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/app-verification
curl -L https://claudskills.com/skills/app-verification/SKILL.md \
  -o ~/.claude/skills/app-verification/SKILL.md

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

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

Telegram

📱 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 App Verification Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/app-verification/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the App Verification skill do?
Builds and maintains a product's own verification harness inside its repo, a verify CLI, a doctor command, per-worktree isolation, a feature map written from the user's point of view, seed data, and a reproduce-first bug handoff. Use when asked to "build a verification harness", "add a doctor command", "give agents a way to verify this app", "prove every feature still works", or "reproduce this bug report". For one-off browser probes against a fixed UI rule catalogue use ui-verification; for repo-wide module boundaries and lint guardrails use codebase-architecture.
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 App Verification skill?
Use App Verification when your Claude Code task falls under the Engineering category — specifically in the architecture 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 App Verification" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the App Verification 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. App Verification is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

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

APA
mblode. (2026). App Verification [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/app-verification/
BibTeX
@misc{app-verification-2026,
  author    = {mblode},
  title     = {App Verification [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/app-verification/}
}

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Security scan

Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.

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

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