Swiftui Pro
twostraws/SwiftUI-Agent-Skill
Comprehensively reviews SwiftUI code for best practices on modern APIs, maintainability, and performance.
Read and write NFC tags using CoreNFC. An agent skill from dpearson2699/swift-ios-skills.
Install Core Nfc
$ npx skills add dpearson2699/swift-ios-skills --skill core-nfc -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-nfc --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/core-nfc .claude/skills/core-nfc && 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 "core-nfc" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-nfc into .claude/skills/core-nfc/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-nfc", 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/core-nfcType 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 core-nfc -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-nfc --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/core-nfc .agents/skills/core-nfc && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "core-nfc" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-nfc into .agents/skills/core-nfc/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-nfc", 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 core-nfc -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-nfc --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/core-nfc .cursor/skills/core-nfc && 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 "core-nfc" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-nfc into .cursor/skills/core-nfc/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-nfc", 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/core-nfc--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 core-nfc -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-nfc --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/core-nfc .gemini/skills/core-nfc && 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 "core-nfc" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-nfc into .gemini/skills/core-nfc/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-nfc", 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 core-nfcInstalls 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 core-nfc -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/core-nfc .github/skills/core-nfc && 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 "core-nfc" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-nfc into .github/skills/core-nfc/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-nfc", 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 core-nfc -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 core-nfc --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/core-nfc .opencode/skills/core-nfc && 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 "core-nfc" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-nfc into .opencode/skills/core-nfc/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-nfc", 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
core-nfc- GitHub stars
- 1.2k
- Token cost
- ~3.2k tokens
- SKILL.md length
- 716 words
- Files
- 3 (incl. references)
- Skills in repo
- 86
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Read and write NFC tags using CoreNFC. An agent skill from dpearson2699/swift-ios-skills.
- Works in 5 steps: Add the Near Field Communication Tag… → Add NFCReaderUsageDescription to… → Add the… → …
- Scanning NDEF tags
- SKILL.md covers Contents, Setup, NDEF Reader Session and Tag Reader Session, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Core Nfc is an agent skill from dpearson2699/swift-ios-skills. Read and write NFC tags using CoreNFC. Use when scanning NDEF tags, reading ISO7816/ISO15693/FeliCa/MIFARE tags, writing NDEF messages, handling NFC session lifecycle, configuring NFC entitlements, or implementing background tag reading in iOS apps.
Its SKILL.md is about 3.2k 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/nfc-patterns.md`).
It sits in Mobile, covering iOS development. The repository describes itself as: Agent Skills for iOS 26+, Swift 6.3, SwiftUI, and modern Apple frameworks.
When your agent uses it
- Scanning NDEF tags
- Reading ISO7816/ISO15693/FeliCa/MIFARE tags
- Writing NDEF messages
- Handling NFC session lifecycle
Example prompts
- “/core-nfc”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Add the Near Field Communication Tag Reading capability in Xcode
- Add NFCReaderUsageDescription to Info.plist with a user-facing reason string
- Add the com.apple.developer.nfc.readersession.formats entitlement with the current TAG value; do not add legacy NDEF
- For ISO 7816 tags, add supported application identifiers to com.apple.developer.nfc.readersession.iso7816.select-identifiers in Info.plist
- For FeliCa tags, add supported system codes to com.apple.developer.nfc.readersession.felica.systemcodes; do not use wildcard system codes
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
Core Nfc loads about 3.2k tokens when it runs, and up to ~6.8k if it reads all its reference files. Until then it costs about 65 tokens; SKILL.md has 716 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 716 words (~3,245 tokens).
“Read and write NFC tags on iPhone using the CoreNFC framework. Covers NDEF reader sessions, tag reader sessions, NDEF message construction, entitlements, and background tag reading.”
- name
- core-nfc
Files
SKILL.md and 2 other files (references) in skills/core-nfc of dpearson2699/swift-ios-skills.
- SKILL.md
- evals/evals.json
- references/nfc-patterns.md
Open the folder on GitHubat commit 8d90fd1
Compare with similar skills
Core Nfc 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 |
|---|---|---|---|---|---|---|
| Core Nfc this skilldpearson2699/swift-ios-skills | 1.2k | — | ~3.2k | Automated safety check: Pass | Custom licence | |
| Swiftui Protwostraws/SwiftUI-Agent-Skill | 5.1k | 2 repos | ~1.5k | Automated safety check: Pass | MIT | |
| Swiftui UI PatternsAFK-surf/OpenBridge | 430 | 4 repos | ~887 | Automated safety check: Pass | MIT | |
| Swiftui Performance Auditharperreed/dotfiles | 334 | 8 repos | ~1.4k | Automated safety check: Pass | None | |
| Swift Testing ExpertAvdLee/Swift-Testing-Agent-Skill | 469 | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Hig Project Contextraintree-technology/hig-doctor | 143 | 5 repos | ~1.2k | Automated safety check: Pass | MIT |
Similar skills
Swiftui UI Patterns
AFK-surf/OpenBridge
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Swiftui Performance Audit
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Audit and improve SwiftUI runtime performance from code review and architecture.
Swift Testing Expert
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Expert guidance for Swift Testing: test structure, expect/require macros, traits and tags, parameterized tests, test plans, parallel execution, async waiting patterns, and XCTest migration.
Hig Project Context
raintree-technology/hig-doctor
Create or update a shared Apple design context document that other HIG skills use to tailor guidance.
Swift Testing Pro
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Writes, reviews, and improves Swift Testing code using modern APIs and best practices.
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Related
Categories
Questions about Core Nfc
What does Core Nfc do?
Read and write NFC tags using CoreNFC. An agent skill from dpearson2699/swift-ios-skills. Core Nfc is an agent skill from dpearson2699/swift-ios-skills. Read and write NFC tags using CoreNFC.
When should I use Core Nfc?
Core Nfc fits situations like: scanning NDEF tags; reading ISO7816/ISO15693/FeliCa/MIFARE tags; writing NDEF messages; handling NFC session lifecycle.
How do I install Core Nfc in Claude Code?
Run `npx skills add dpearson2699/swift-ios-skills --skill core-nfc -a claude-code`. Or copy the skill folder (skills/core-nfc in dpearson2699/swift-ios-skills) into .claude/skills/core-nfc in your project. Claude Code loads it when a task matches its description.
How do I install Core Nfc in Codex?
Run `npx skills add dpearson2699/swift-ios-skills --skill core-nfc -a codex`. Or copy the skill folder (skills/core-nfc in dpearson2699/swift-ios-skills) into .agents/skills/core-nfc in your project. Codex loads it when a task matches its description.
Can I use Core Nfc 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 core-nfc -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/core-nfc, .gemini/skills/core-nfc, .github/skills/core-nfc and .opencode/skills/core-nfc in your project.
What does Core Nfc need to run?
SKILL.md names no scripts, command-line tools or credentials: Core Nfc is instructions for the agent only.
Does Core Nfc 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 Core Nfc 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 Core Nfc use?
Core Nfc 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 Core Nfc use?
About 3.2k tokens (SKILL.md is roughly 13k 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 3.5k tokens, read only when the agent opens those files.
What are the alternatives to Core Nfc?
Skills that share tags, products or a category with Core Nfc: Swiftui Pro (twostraws/SwiftUI-Agent-Skill, 5.1k stars), Swiftui UI Patterns (AFK-surf/OpenBridge, 430 stars), Swiftui Performance Audit (harperreed/dotfiles, 334 stars) and Swift Testing Expert (AvdLee/Swift-Testing-Agent-Skill, 469 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Core Nfc?
dpearson2699 (a GitHub user) maintains it in dpearson2699/swift-ios-skills, which has 1,175 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.