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Dimillian Skills - Setup Guide

Source: dimillian/skills via skills.sh - 33.8K combined installs across 18 indexed listings; first seen Oct 9, 2026 (extended-query probe) GitHub: dimillian/skills (3,989 stars, MIT; pushed 2026-03-29; skill dirs at the repo root, swiftui-performance-audit/SKILL.md style) Category: Apple Platform / SwiftUI / iOS Quality Tier: 🟡 Beta - Dimillian (Thomas Ricouard), 3,989 stars, MIT; last pushed Mar 2026; all sampled verdicts Pass

Dimillian Skills is the public skill collection from Thomas Ricouard (dimillian): sixteen self-contained skills for Apple platform engineering, plus supporting workflow skills for GitHub operations, diff review swarms, bug investigation swarms, refactoring, and skill curation. Its strongest entries target SwiftUI: runtime performance auditing, iOS 26 Liquid Glass adoption, UI patterns, view refactoring, and Swift 6.2 concurrency.

Each skill is a self-contained folder at the repo root with its own SKILL.md carrying triggers, workflow guidance, examples, and references. The README's install method places the skill folders under $CODEX_HOME/skills; skills.sh also indexes the same folders for registry-based installs. A practical starting point: pair swiftui-performance-audit with swiftui-ui-patterns on an existing app, then run the review and bug swarms before merging changes.

Installation

# Browse the collection
npx skills add dimillian/skills --list

# Install the full collection globally
npx skills add dimillian/skills -g --all

# Or install individual skills
npx skills add dimillian/skills -g --skill swiftui-performance-audit

The README's manual method for Codex: copy the skill folders you want from the repo into $CODEX_HOME/skills. Every skill is self-contained, so folders can be copied individually with no cross-skill dependencies.

What It Provides

Skill Installs Use For
swiftui-performance-audit 9,505 Auditing SwiftUI runtime performance: invalidation storms, identity churn, layout thrash, heavy render work
swiftui-liquid-glass 5,060 Implementing and reviewing iOS 26+ Liquid Glass APIs with correct modifier ordering, grouping, and fallbacks
swiftui-ui-patterns 3,439 Best-practice SwiftUI screens and components: navigation, sheets, app wiring, async state
ios-debugger-agent 2,705 Building, launching, and debugging iOS apps on a booted simulator with UI inspection, screenshots, and log capture
swiftui-view-refactor 2,226 Refactoring SwiftUI views toward smaller subviews and stable view trees with explicit dependency injection
swift-concurrency-expert 1,897 Fixing Swift 6.2+ concurrency issues: actor isolation, Sendable violations, main-actor annotations
macos-spm-app-packaging 1,339 Scaffolding, building, signing, and notarizing SwiftPM-based macOS apps without an Xcode project
app-store-changelog 1,308 Turning git history into user-facing App Store release notes
react-component-performance 1,029 Diagnosing slow React components: re-render churn, unstable props, list bottlenecks
github 846 Operating on GitHub through the gh CLI: issues, PRs, workflow runs, run logs, advanced queries
project-skill-audit 755 Auditing a project to recommend the highest-value new skills or skill updates
review-and-simplify-changes 751 Reviewing diffs for reuse, quality, efficiency, and clarity, then applying safe fixes
review-swarm 718 Running a read-only four-agent diff review for regressions, security, and coverage gaps
bug-hunt-swarm 684 Running a read-only four-agent bug investigation that ranks root-cause paths
orchestrate-batch-refactor 660 Planning and executing dependency-aware parallel refactors with scoped work packets
macos-menubar-tuist-app 650 Building, refactoring, or reviewing Tuist + SwiftUI menubar apps with reliable local launch scripts

The remaining 2 indexed listings range from 68 to 194 installs.

Why This Matters for Hermes Agents

Agents doing Apple platform work hit a specific failure profile: SwiftUI code that looks correct but thrashes at runtime, concurrency that compiles under Swift 6 but races under load, and release chores that are easy to get subtly wrong. These skills give an agent auditable procedures for each: performance audits that trace invalidation storms and identity churn, a Liquid Glass skill that encodes correct modifier ordering for iOS 26 APIs, and a concurrency expert for actor isolation and Sendable violations. The two swarm skills take a different approach to review: instead of one pass, they run four read-only agents over a diff or a bug report and return a ranked path, which suits agents that can delegate. The macOS packaging skills take Xcode out of the loop for SwiftPM apps, and the GitHub skill wraps the gh CLI so an agent can read CI results and run logs directly. Everything is plain SKILL.md content with no runtime dependencies, so only the skills relevant to a task need to be present.

Usage

You say What happens
Our SwiftUI list scrolls badly on older iPhones swiftui-performance-audit traces invalidation storms, identity churn, and layout thrash, then prescribes targeted fixes
Adopt Liquid Glass in this iOS 26 settings screen swiftui-liquid-glass applies correct modifier ordering, grouping, interactivity, and fallbacks
This screen crashes in the simulator, find out why ios-debugger-agent builds and launches the app on a booted simulator, then captures logs and screenshots
Review this branch before we merge review-swarm runs a read-only four-agent diff review and returns a prioritized fix path
Migrate this feature to Swift 6.2 strict concurrency swift-concurrency-expert fixes actor isolation, Sendable violations, and main-actor annotations
Write the release notes for our next App Store submission app-store-changelog collects changes since the last tag and rewrites them as What's New bullets
Package this SwiftPM app for macOS without opening Xcode macos-spm-app-packaging scaffolds, builds, signs, and optionally notarizes the app

Verification

Confirm the install and review a skill before trusting it:

# List installed skills
npx skills list | grep dimillian

# Codex manual installs: confirm the folders landed
ls "$CODEX_HOME/skills" | grep swiftui

Each skill lives at a predictable path in the repo, so you can review the exact instructions the agent will read before installing. For example, fetch the SwiftUI performance audit skill at https://raw.githubusercontent.com/dimillian/skills/main/swiftui-performance-audit/SKILL.md (verified reachable Oct 10, 2026).

Security

skills.sh verdicts for sampled skills (verified Oct 10, 2026) - re-check the security pages on skills.sh before production use:

Skill Gen Agent Trust Hub Socket Snyk
swiftui-performance-audit Pass Pass Pass
swiftui-liquid-glass Pass Pass Pass
swiftui-ui-patterns Pass Pass Pass

Integration with CorpusIQ

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This page is part of the CorpusIQ directory, the reference we maintain for the MCP server and agent-skill ecosystem. Run alongside CorpusIQ, a third-party server like this one can be combined with a company's own business data in a single answer.

See what CorpusIQ connects

Limitations

  • Verdicts cover three sampled skills only; the rest of the suite is unaudited here, so re-check each skill's security page on skills.sh before production use.
  • Last pushed Mar 2026: the SwiftUI and Liquid Glass guidance tracks fast-moving Apple SDKs, so re-check it against your current Xcode and iOS versions before applying it.
  • The README documents sixteen skills while eighteen listings are indexed on skills.sh; gh-issue-fix-flow and simplify-code appear in the listings but not in the README skill table.
  • ios-debugger-agent needs XcodeBuildMCP and a booted simulator, and the github skill needs an authenticated gh CLI; install those prerequisites first.
  • The README's documented install path targets Codex ($CODEX_HOME/skills); other agents need the skills.sh CLI or a manual copy into their skills directory.

  • MIT license per the repo; pin a revision when vendoring.

  • Snapshot data, verified Oct 10, 2026: 33,834 combined installs across 18 indexed listings; 3,989 GitHub stars; MIT; last pushed 2026-03-29. Counts drift over time.

Pro Tips

  • Start with the SwiftUI trio: swiftui-performance-audit (9,505 installs) and swiftui-ui-patterns cover most day-to-day app work.
  • Set up prerequisites before first use: XcodeBuildMCP plus a booted simulator for ios-debugger-agent, and an authenticated gh CLI for github.
  • Use review-swarm and bug-hunt-swarm as read-only gates: they return prioritized findings and paths, not patches, so run them before changes land.
  • Copy only the folders you need under $CODEX_HOME/skills; every skill is self-contained with no cross-skill dependencies.
  • The repo ships a GitHub Pages site (linked from the README) for browsing skill descriptions before installing.

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