PostToolUse

PostToolUse is a hook for Claude Code from The-Artificer-of-Ciphers-LLC/skills-from-the-artificer. Its token cost is not measured, scanned A, original, MIT.

A hook that runs after a write or edit tool changes code and prints a Swift review checklist. It checks for real implementations, built-in framework features, concurrency safety, accessibility, security, and performance.

In plain words
What is it for?
Use it to review edited Swift and SwiftUI code for mocks, unnecessary custom replacements, concurrency errors, accessibility omissions, insecure settings, and performance problems.
Why use it?
It provides a final reminder to catch unsafe or incomplete Swift changes immediately after editing.

Hook for Claude Code

Written for Claude Code: PostToolUse hook event.

Part of the swift-agents plugin — 16 agents, 3 hooks shipped together

One of 3 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 2 are separate, each on its own page.

Good fit Use it to review edited Swift and SwiftUI code for mocks, unnecessary custom replacements, concurrency errors, accessibility omissions, insecure settings, and performance problems.

Compare 6 hooks from other repositories ↓
Install with agentmods
npx agentmods add hooks/the-artificer-of-ciphers-llc/skills-from-the-artificer/post-tool-use
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.

Clone the repo
git clone --depth 1 https://github.com/The-Artificer-of-Ciphers-LLC/skills-from-the-artificer

Made for: Claude Code.

Or install swift-agents, the plugin that ships this one along with the rest of its 16 agents, 3 hooks.

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 PostToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/the-artificer-of-ciphers-llc/skills-from-the-artificer/post-tool-use/github.svg)](https://agentmods.dev/hooks/the-artificer-of-ciphers-llc/skills-from-the-artificer/post-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/the-artificer-of-ciphers-llc/skills-from-the-artificer/post-tool-use"><img src="https://agentmods.dev/badge/hooks/the-artificer-of-ciphers-llc/skills-from-the-artificer/post-tool-use/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 PostToolUse

Your own site · 80×15
<a href="https://agentmods.dev/hooks/the-artificer-of-ciphers-llc/skills-from-the-artificer/post-tool-use"><img src="https://agentmods.dev/badge/hooks/the-artificer-of-ciphers-llc/skills-from-the-artificer/post-tool-use.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
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.
Security

Grade A, and why

PostToolUse 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 today.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

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.

swift-agents/.github/hooks/hooks.json · 15 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": {
        "toolName": "Write|Edit"
      },
      "hooks": [
        {
          "type": "command",
          "command": "cat <<'HOOK_OUTPUT'\nREMINDER: If you just wrote or edited Swift code, verify:\n- NO MOCKS: Every function, view, and data source must be real. No placeholders or stubs.\n- BUILT-INS: Are you reimplementing something SwiftUI provides? Use Form, @AppStorage, Settings,\n  .searchable, .refreshable, PhotosPicker, ShareLink, SubscriptionStoreView instead.\n- SYNTHESIS: Are you writing Codable CodingKeys, == operators, or hash(into:) manually?\n  Remove them. The compiler synthesizes these automatically.\n- Concurrency: All async/await, actor, and Sendable usage follows Swift 6.2 strict concurrency rules\n- SwiftUI: @Observable used (not ObservableObject on iOS 17+), NavigationStack (not NavigationView)\n- Accessibility: VoiceOver labels, Dynamic Type, and accessibility traits on all interactive elements\n- SwiftData: @Model schemas have explicit delete rules, indexes, and migration plans\n- Security: No hardcoded secrets, Keychain for sensitive data, ATS not disabled\n- Performance: No synchronous I/O on main thread, images downsampled, lazy containers for large lists\nHOOK_OUTPUT"
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 3. Installing the file brings all of them; each is measured and scanned on its own page.

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. today First seen · 15 lines scan A f36aeb716ea1

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository The-Artificer-of-Ciphers-LLC/skills-from-the-artificer (6 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. 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 2026-10-15.