AgentSquad for Swift
2FastLabs/agent-squad
Guides building on-device multi-agent apps in Swift with the AgentSquad framework: which agent, orchestrator, classifier, storage or voice type fits each situation.
Build, review, or improve Core Data persistence in apps that have not adopted SwiftData.
Install Core Data
$ npx skills add dpearson2699/swift-ios-skills --skill core-data -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-data --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-data .claude/skills/core-data && 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-data" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-data into .claude/skills/core-data/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-data", 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-dataType 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-data -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-data --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-data .agents/skills/core-data && 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-data" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-data into .agents/skills/core-data/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-data", 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-data -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-data --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-data .cursor/skills/core-data && 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-data" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-data into .cursor/skills/core-data/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-data", 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-data--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-data -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dpearson2699/swift-ios-skills core-data --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-data .gemini/skills/core-data && 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-data" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-data into .gemini/skills/core-data/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-data", 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-dataInstalls 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-data -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-data .github/skills/core-data && 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-data" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-data into .github/skills/core-data/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-data", 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-data -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-data --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-data .opencode/skills/core-data && 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-data" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/core-data into .opencode/skills/core-data/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "core-data", 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-data- GitHub stars
- 1.2k
- Token cost
- ~4.1k tokens
- SKILL.md length
- 844 words
- Files
- 4 (incl. references)
- Skills in repo
- 86
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Build, review, or improve Core Data persistence in apps that have not adopted SwiftData.
- Works in 4 steps: Enable persistent history and… → Observe changes and fetch transactions… → Merge transaction notifications into… → …
- Working with NSManagedObject subclasses
- SKILL.md covers Contents, Stack Setup, Concurrency and Threading and NSFetchedResultsController, plus 9 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Core Data is an agent skill from dpearson2699/swift-ios-skills. Build, review, or improve Core Data persistence in apps that have not adopted SwiftData. Use when working with NSManagedObject subclasses, NSFetchedResultsController for list-driven UI, NSBatchInsertRequest / NSBatchDeleteRequest / NSBatchUpdateRequest for bulk operations, NSPersistentHistoryChangeRequest for persistent history tracking and multi-target sync, NSStagedMigrationManager for staged schema migrations (iOS 17+), NSCompositeAttributeDescription for composite attributes (iOS 17+), or when integrating…
Its SKILL.md is about 4.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `evals/evals.json`, `references/persistent-history.md` and `references/staged-migration.md`).
It sits in Databases, covering Database migrations. It works with iOS and Swift. The repository describes itself as: Agent Skills for iOS 26+, Swift 6.3, SwiftUI, and modern Apple frameworks.
When your agent uses it
- Working with NSManagedObject subclasses
- NSFetchedResultsController for list-driven UI
- NSBatchInsertRequest / NSBatchDeleteRequest / NSBatchUpdateRequest for bulk operations
- NSPersistentHistoryChangeRequest for persistent history tracking and multi-target sync
Example prompts
- “/core-data”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Enable persistent history and remote-change notifications before loading the
- Observe changes and fetch transactions after the target's durable token.
- Merge transaction notifications into live contexts, then persist the new
- Purge only history that every relevant consumer has processed.
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 Data loads about 4.1k tokens when it runs, and up to ~5.2k if it reads all its reference files. Until then it costs about 163 tokens; SKILL.md has 844 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 844 words (~4,142 tokens).
“Build and maintain data persistence using Core Data for apps that have not adopted SwiftData. Covers stack setup, concurrency, batch operations, NSFetchedResultsController, persistent history tracking, staged migration, and testing.”
- name
- core-data
Files
SKILL.md and 3 other files (references) in skills/core-data of dpearson2699/swift-ios-skills.
- SKILL.md
- evals/evals.json
- references/persistent-history.md
- references/staged-migration.md
Open the folder on GitHubat commit 8d90fd1
Compare with similar skills
Core Data 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 Data this skilldpearson2699/swift-ios-skills | 1.2k | — | ~4.1k | Automated safety check: Pass | Custom licence | |
| AgentSquad for Swift2FastLabs/agent-squad | 7.8k | — | ~3.5k | Automated safety check: Pass | Apache-2.0 | |
| Swiftui Expert SkillAFK-surf/OpenBridge | 430 | 2 repos | ~3.9k | Automated safety check: Pass | MIT | |
| Dep Validateblokadaorg/blokada | 3.3k | — | ~5.7k | Automated safety check: Notes | MPL-2.0 | |
| Inspector MCPipedro/Inspector | 170 | — | ~3.4k | Automated safety check: Pass | MIT | |
| Stellar iOS Mac SDKSoneso/stellar-ios-mac-sdk | 132 | — | ~4.3k | Automated safety check: Pass | Apache-2.0 |
Similar skills
Swiftui Expert Skill
AFK-surf/OpenBridge
Write, review, or improve SwiftUI code following best practices for state management, view composition, performance, modern APIs, Swift concurrency, and iOS 26+ Liquid Glass adoption.
Dep Validate
blokadaorg/blokada
A skill your agent uses to validate risky dependency bumps end to end as a local or cloud-launched agent.
Inspector MCP
ipedro/Inspector
A skill your agent uses when an agent needs to inspect a live iOS app through the Inspector MCP bridge, register or troubleshoot InspectorMCPServer for a consumer Xcode project, or query, resolve…
Stellar iOS Mac SDK
Soneso/stellar-ios-mac-sdk
Guides Stellar blockchain development in Swift using stellar-ios-mac-sdk.
Swiftui Animation
AstraFoundry/KumoApp
Implement, review, or improve SwiftUI animations and transitions.
More from dpearson2699/swift-ios-skills
All 86 skills in this repoiOS Memgraph Analysis
dpearson2699/swift-ios-skills
A skill your agent uses when capturing or analyzing an iOS .memgraph, especially when the task mentions a memory leak, heap growth, persistent memory increase, ownership path, or matched-capture…
Natural Language
dpearson2699/swift-ios-skills
Tokenize, tag, and analyze natural language text using Apple's NaturalLanguage framework and translate between languages with the Translation framework.
iOS Ettrace Performance
dpearson2699/swift-ios-skills
A skill your agent uses when capturing or analyzing ETTrace profiles for a focused iOS launch or runtime flow, including exact-build dSYM UUID matching, Simulator or device capture, processed…
Accessorysetupkit
dpearson2699/swift-ios-skills
Discover and configure Bluetooth and Wi-Fi accessories using AccessorySetupKit.
Activitykit
dpearson2699/swift-ios-skills
Implement, review, or improve Live Activities and Dynamic Island experiences in iOS apps using ActivityKit.
Adattributionkit
dpearson2699/swift-ios-skills
Measure ad effectiveness with privacy-preserving attribution using AdAttributionKit.
Related
Categories
Questions about Core Data
What does Core Data do?
Build, review, or improve Core Data persistence in apps that have not adopted SwiftData. Core Data is an agent skill from dpearson2699/swift-ios-skills. Build, review, or improve Core Data persistence in apps that have not adopted SwiftData.
When should I use Core Data?
Core Data fits situations like: working with NSManagedObject subclasses; NSFetchedResultsController for list-driven UI; NSBatchInsertRequest / NSBatchDeleteRequest / NSBatchUpdateRequest for bulk operations; NSPersistentHistoryChangeRequest for persistent history tracking and multi-target sync.
How do I install Core Data in Claude Code?
Run `npx skills add dpearson2699/swift-ios-skills --skill core-data -a claude-code`. Or copy the skill folder (skills/core-data in dpearson2699/swift-ios-skills) into .claude/skills/core-data in your project. Claude Code loads it when a task matches its description.
How do I install Core Data in Codex?
Run `npx skills add dpearson2699/swift-ios-skills --skill core-data -a codex`. Or copy the skill folder (skills/core-data in dpearson2699/swift-ios-skills) into .agents/skills/core-data in your project. Codex loads it when a task matches its description.
Can I use Core Data 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-data -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-data, .gemini/skills/core-data, .github/skills/core-data and .opencode/skills/core-data in your project.
What does Core Data need to run?
SKILL.md names no scripts, command-line tools or credentials: Core Data is instructions for the agent only.
Does Core Data 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 Data 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 Data use?
Core Data 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 Data use?
About 4.1k tokens (SKILL.md is roughly 17k 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 1.1k tokens, read only when the agent opens those files.
What are the alternatives to Core Data?
Skills that share tags, products or a category with Core Data: AgentSquad for Swift (2FastLabs/agent-squad, 7.8k stars), Swiftui Expert Skill (AFK-surf/OpenBridge, 430 stars), Dep Validate (blokadaorg/blokada, 3.3k stars) and Inspector MCP (ipedro/Inspector, 170 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Core Data?
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.