agentmods.dev

verify-against-spec

verify-against-spec is a skill for Claude Code from markdavidgan/apple-dev-skills. It costs 86 tokens per session (2,292 once invoked), scanned A, original, MIT.

A checklist and verification process for comparing an Apple feature with its design specification. It can check implementation coverage, build and test results, documentation, and—when available—visual screenshots.

In plain words
What is it for?
Use it at the end of a multi-session SwiftUI feature or after code-review fixes to confirm that the specification was fully implemented.
Why use it?
It helps reveal missing requirements and visual differences before a feature is considered finished.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the apple-dev-skills plugin — 62 skills, 25 commands, 7 agents shipped together

not rated 5repo 10d ago A scan 86 tokens original MIT

Good fit Use it at the end of a multi-session SwiftUI feature or after code-review fixes to confirm that the specification was fully implemented.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/markdavidgan/apple-dev-skills/verify-against-spec
View source ↗ markdavidgan/apple-dev-skills
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add markdavidgan/apple-dev-skills --skill verify-against-spec
Clone the repo
git clone --depth 1 https://github.com/markdavidgan/apple-dev-skills

Made for: Claude Code.

Or install apple-dev-skills, the plugin that ships this one along with the rest of its 62 skills, 25 commands, 7 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for verify-against-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/markdavidgan/apple-dev-skills/verify-against-spec/github.svg)](https://agentmods.dev/skills/markdavidgan/apple-dev-skills/verify-against-spec)
Your own site
<a href="https://agentmods.dev/skills/markdavidgan/apple-dev-skills/verify-against-spec"><img src="https://agentmods.dev/badge/skills/markdavidgan/apple-dev-skills/verify-against-spec/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for verify-against-spec

Your own site · 80×15
<a href="https://agentmods.dev/skills/markdavidgan/apple-dev-skills/verify-against-spec"><img src="https://agentmods.dev/badge/skills/markdavidgan/apple-dev-skills/verify-against-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,292 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00086 $0.02292
Opus 5 $0.00043 $0.01146
Sonnet 5 $0.00017 $0.00458
Haiku 4.5 $0.00009 $0.00229

Measured 5d ago against content hash 2e5a1223ff53, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

verify-against-spec scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

platforms/claude/skills/verify-against-spec/SKILL.md · 233 lines

How it starts

The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verify Against Spec

Parallel verification that catches implementation gaps before they slip through context compaction.

When to Use

  • End of a multi-session feature development cycle
  • "Make sure we haven't missed anything"
  • Context window is filling up and you want a coverage check
  • After a code review that introduced fixes — are all fixes applied?

Do NOT use for: Simple single-file changes, bug fixes without a spec, UI polish.

Process

Find spec file (+ design contract, if one exists)
    │
    ▼
Launch parallel agents
    ├─► Spec Coverage Verifier
    ├─► Build + Test
    ├─► Docs Sync
    └─► Visual Fidelity Verifier   (only when a design-contract + captures/ exist)
    │
    ▼
Triage results
    │
    ▼
High severity gaps? ─► Yes ─► Fix gaps ─► Commit
                    └► No  ─► Commit

Checkpoint Compaction

Before launching verification agents, after aggregating their findings, and before fixing any high-severity gaps, update the spec plan or verification report with a durable checkpoint. Include completed work, remaining steps, changed files, decisions made, verification already run, failures, and the next exact command. After compaction or a new session, re-read the checkpoint and git status before continuing. This skill exists partly because context compaction hides gaps; never compact before the verification findings have been written down.

Step 1: Find the Spec

Look in order:

  1. docs/plans/<feature-plan>.md
  2. docs/brainstorm/<feature>/design.md
  3. Ask the user if unclear

Also look for a design contract (<app>/docs/vision/<feature>-design-contract.md, see design-contract). If one exists with a captures/ directory, enable Agent 4.

Step 2: Launch Parallel Agents

Dispatch the agents simultaneously. Each runs independently. Agent 4 runs only when a design contract + captures exist (UI-fidelity work); skip it for non-visual features.

Coordinator (you)
├─► Agent 1 — Spec Coverage Verifier   [Standard tier: claude-sonnet-4-6 / gpt-4.1 / gemini-3.1-pro / kimi-k2.5]
├─► Agent 2 — Build + Test             [Fast tier:     claude-haiku-4-5 / gpt-4.1-mini / gemini-3.0-flash / kimi-for-coding]
├─► Agent 3 — Docs Sync               [Fast tier:     claude-haiku-4-5 / gpt-4.1-mini / gemini-3.0-flash / kimi-for-coding]
└─► Agent 4 — Visual Fidelity Verifier [Standard tier: claude-sonnet-4-6 / gpt-4.1 / gemini-3.1-pro / kimi-k2.5]   (conditional)
         │
         ▼ (all complete)
Coordinator — triage and fix

Read the full file on GitHub · 233 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 233 lines · 86 tokens per session scan A 2e5a1223ff53

Subscribe to this mod's changes

verify-against-spec is a skill published in the GitHub repository markdavidgan/apple-dev-skills (5 stars, last pushed 10d ago), licensed MIT. It adds 86 tokens to every session and 2,292 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Claude CodeDesign and UXTestingagent-skillsai-skillsapp-store-connectapplecursorworkflow
Related

Other skills, from other repositories

asc-shots-pipeline

Orchestrate iOS screenshot automation with xcodebuild/simctl for build-run, AXe for UI actions, JSON settings and plan files, Koubou-based framing (asc screenshots frame), and screenshot upload (asc screenshots upload). Use when users ask for automated screenshot capture, AXe-driven simulator flows, frame composition…

rorkai/app-store-connect-cli-skills · 79 tokens

app-store-screenshots

Use when building App Store or Google Play screenshot pages, generating exportable marketing screenshots for iOS and/or Android apps, or scaffolding a screenshot editor with Next.js. Triggers on app store, play store, screenshots, marketing assets, html-to-image, phone mockup, android screenshots, feature graphic.

ParthJadhav/app-store-screenshots · 68 tokens

asc-ppp-pricing

Set territory-specific pricing for subscriptions and in-app purchases using current asc setup, pricing summary, price import, and price schedule commands. Use when adjusting prices by country or implementing localized PPP strategies.

rorkai/app-store-connect-cli-skills · 45 tokens

asc-revenuecat-catalog-sync

Reconcile App Store Connect subscriptions and in-app purchases with RevenueCat products, entitlements, offerings, and packages using asc and RevenueCat MCP. Use when setting up or syncing subscription catalogs across ASC and RevenueCat.

rorkai/app-store-connect-cli-skills · 51 tokens

asc-apple-ads

Use when managing Apple Ads with asc, including OAuth profiles, ad-account discovery, Platform API v1 campaigns and targeting, reports, assets, recommendations, guarded mutations, raw requests, and Campaign Management API v5 migration.

rorkai/app-store-connect-cli-skills · 50 tokens

asc-aso-audit

Run an offline ASO audit on canonical App Store metadata under ./metadata and surface keyword gaps using Astro MCP. Use after pulling metadata with asc metadata pull.

rorkai/app-store-connect-cli-skills · 40 tokens