Update Swiftui APIs
AvdLee/SwiftUI-Agent-Skill
Scan Apple's SwiftUI documentation for deprecated APIs and update the SwiftUI Expert Skill with modern replacements.
Add Apple Pencil drawing with PKCanvasView, PKToolPicker, PKDrawing serialization/export, stroke inspection, and PencilKit/PaperKit handoffs.
Install Pencilkit
$ npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dpearson2699/swift-ios-skills pencilkit --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/pencilkit .claude/skills/pencilkit && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "pencilkit" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/pencilkit into .claude/skills/pencilkit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pencilkit", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/pencilkitType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dpearson2699/swift-ios-skills pencilkit --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/pencilkit .agents/skills/pencilkit && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "pencilkit" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/pencilkit into .agents/skills/pencilkit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pencilkit", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dpearson2699/swift-ios-skills pencilkit --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/pencilkit .cursor/skills/pencilkit && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "pencilkit" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/pencilkit into .cursor/skills/pencilkit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pencilkit", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/dpearson2699/swift-ios-skills.git --path skills/pencilkit--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dpearson2699/swift-ios-skills pencilkit --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/pencilkit .gemini/skills/pencilkit && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "pencilkit" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/pencilkit into .gemini/skills/pencilkit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pencilkit", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install dpearson2699/swift-ios-skills pencilkitInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/pencilkit .github/skills/pencilkit && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "pencilkit" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/pencilkit into .github/skills/pencilkit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pencilkit", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install dpearson2699/swift-ios-skills pencilkit --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/pencilkit .opencode/skills/pencilkit && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "pencilkit" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/pencilkit into .opencode/skills/pencilkit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pencilkit", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
pencilkit- GitHub stars
- 1.2k
- Token cost
- ~3.9k tokens
- SKILL.md length
- 938 words
- Files
- 3 (incl. references)
- Skills in repo
- 86
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Add Apple Pencil drawing with PKCanvasView, PKToolPicker, PKDrawing serialization/export, stroke inspection, and PencilKit/PaperKit handoffs.
- Works in 5 steps: Capture: Read canvasView.drawing from → Serialize: Create dataRepresentation(),… → Version-gate: Apply Content Version… → …
- Building drawing apps
- SKILL.md covers Contents, Setup, Capture-to-Export Workflow and PKCanvasView Basics, plus 10 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Pencilkit is an agent skill from dpearson2699/swift-ios-skills. Add Apple Pencil drawing with PKCanvasView, PKToolPicker, PKDrawing serialization/export, stroke inspection, and PencilKit/PaperKit handoffs. Use when building drawing apps, annotation features, handwriting capture, signature fields, content-version-safe ink workflows, or Apple Pencil-powered experiences on iOS/iPadOS/visionOS.
Its SKILL.md is about 3.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/pencilkit-patterns.md`).
It sits in Mobile, covering iOS development. It works with iOS and SwiftUI. The repository describes itself as: Agent Skills for iOS 26+, Swift 6.3, SwiftUI, and modern Apple frameworks.
When your agent uses it
- Building drawing apps
- Annotation features
- Handwriting capture
- Signature fields
Example prompts
- “/pencilkit”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Capture: Read canvasView.drawing from
- Serialize: Create dataRepresentation(), write atomically, and run the
- Version-gate: Apply Content Version Compatibility
- Sync: Send only validated, compatible data and mark the revision synced
- Export: Validate a nonempty drawing region and intended scale before
What it can do on your machine
Read from SKILL.md and the folder at commit 8d90fd1. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are swift).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
sosumi.ai
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Pencilkit loads about 3.9k tokens when it runs, and up to ~6.4k if it reads all its reference files. Until then it costs about 85 tokens; SKILL.md has 938 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 938 words (~3,872 tokens).
“Capture Apple Pencil and finger input using PKCanvasView, manage drawing tools with PKToolPicker, serialize drawings with PKDrawing, and wrap PencilKit in SwiftUI.”
- name
- pencilkit
Files
SKILL.md and 2 other files (references) in skills/pencilkit of dpearson2699/swift-ios-skills.
- SKILL.md
- evals/evals.json
- references/pencilkit-patterns.md
Open the folder on GitHubat commit 8d90fd1
Compare with similar skills
Pencilkit next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Pencilkit this skilldpearson2699/swift-ios-skills | 1.2k | — | ~3.9k | Automated safety check: Pass | Custom licence | |
| Update Swiftui APIsAvdLee/SwiftUI-Agent-Skill | 3.7k | — | ~1.2k | Automated safety check: Pass | MIT | |
| Swiftui Liquid Glassharperreed/dotfiles | 334 | 8 repos | ~941 | Automated safety check: Pass | None | |
| Swiftui Expert Skillomarshahine/HomeClaw | 175 | 4 repos | ~2.8k | Automated safety check: Pass | MIT | |
| Hig Project Contextraintree-technology/hig-doctor | 143 | 5 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Liquid Glass DesignAstraFoundry/KumoApp | 291 | 5 repos | ~2.3k | Automated safety check: Pass | AGPL-3.0 |
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A skill your agent uses when writing, reviewing, or refactoring SwiftUI code for iOS or macOS, including state management, view composition, performance, Liquid Glass adoption, or Instruments .trace…
Hig Project Context
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Create or update a shared Apple design context document that other HIG skills use to tailor guidance.
Liquid Glass Design
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iOS 26 Liquid Glass design system — dynamic glass material with blur, reflection, and interactive morphing for SwiftUI, UIKit, and WidgetKit.
Live-Device iOS QA
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Tests a SwiftUI app on a real iPhone connected by USB, reading the Swift source and then looping through screenshot, analysis and action to find bugs.
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Related
Categories
Questions about Pencilkit
What does Pencilkit do?
Add Apple Pencil drawing with PKCanvasView, PKToolPicker, PKDrawing serialization/export, stroke inspection, and PencilKit/PaperKit handoffs. Pencilkit is an agent skill from dpearson2699/swift-ios-skills. Add Apple Pencil drawing with PKCanvasView, PKToolPicker, PKDrawing serialization/export, stroke inspection, and PencilKit/PaperKit handoffs.
When should I use Pencilkit?
Pencilkit fits situations like: building drawing apps; annotation features; handwriting capture; signature fields.
How do I install Pencilkit in Claude Code?
Run `npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a claude-code`. Or copy the skill folder (skills/pencilkit in dpearson2699/swift-ios-skills) into .claude/skills/pencilkit in your project. Claude Code loads it when a task matches its description.
How do I install Pencilkit in Codex?
Run `npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a codex`. Or copy the skill folder (skills/pencilkit in dpearson2699/swift-ios-skills) into .agents/skills/pencilkit in your project. Codex loads it when a task matches its description.
Can I use Pencilkit in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add dpearson2699/swift-ios-skills --skill pencilkit -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pencilkit, .gemini/skills/pencilkit, .github/skills/pencilkit and .opencode/skills/pencilkit in your project.
What does Pencilkit need to run?
SKILL.md names no scripts, command-line tools or credentials: Pencilkit is instructions for the agent only.
Does Pencilkit access the network?
SKILL.md names 1 domain. As links in the text: sosumi.ai. This is read from the text; nothing was executed.
Is Pencilkit safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Pencilkit use?
Pencilkit has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Pencilkit use?
About 3.9k tokens (SKILL.md is roughly 15k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.6k tokens, read only when the agent opens those files.
What are the alternatives to Pencilkit?
Skills that share tags, products or a category with Pencilkit: Update Swiftui APIs (AvdLee/SwiftUI-Agent-Skill, 3.7k stars), Swiftui Liquid Glass (harperreed/dotfiles, 334 stars), Swiftui Expert Skill (omarshahine/HomeClaw, 175 stars) and Hig Project Context (raintree-technology/hig-doctor, 143 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Pencilkit?
dpearson2699 (a GitHub user) maintains it in dpearson2699/swift-ios-skills, which has 1,183 GitHub stars. The repository holds 86 skills in this directory. The repository was last updated on July 31, 2026.
Source: dpearson2699/swift-ios-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.