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Agent skill

Swift Memory Management

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Prevent retain cycles via ARC, weak/unowned references, and Capture Lists in Swift.

MITAuto-check passedMobile

Install Swift Memory Management

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill swift-memory-management -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard swift-memory-management --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/swift/swift-memory-management .claude/skills/swift-memory-management && rm -rf skills-src

Use ~/.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/

Facts

Skill name
swift-memory-management
GitHub stars
572
Token cost
~484 tokens
SKILL.md length
196 words
Files
3 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Prevent retain cycles via ARC, weak/unowned references, and Capture Lists in Swift.

  • Managing Swift ARC
  • SKILL.md covers Priority: P0 (CRITICAL), Implementation Guidelines, Anti-Patterns and References, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Avoiding retain cycles

What it does

Swift Memory Management is an agent skill from HoangNguyen0403/agent-skills-standard. Prevent retain cycles via ARC, weak/unowned references, and Capture Lists in Swift. Use when managing Swift ARC, avoiding retain cycles, or configuring capture lists in closures.

Its SKILL.md is about 480 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/implementation.md`).

It sits in Mobile, covering iOS development. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Managing Swift ARC
  • Avoiding retain cycles
  • Configuring capture lists in closures

Example prompts

  • “/swift-memory-management”

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. 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.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    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

Swift Memory Management loads about 484 tokens when it runs, and up to ~824 if it reads all its reference files. Until then it costs about 51 tokens; SKILL.md has 196 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~51
When it runs · the whole SKILL.md, loaded when a task matches
~484
With references · SKILL.md plus every file in references/, read only if the agent opens them
~824

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

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 196 words, ~484 tokens.

Download SKILL.mdSave it as .claude/skills/swift-memory-management/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
swift-memory-management
description
Prevent retain cycles via ARC, weak/unowned references, and Capture Lists in Swift. Use when managing Swift ARC, avoiding retain cycles, or configuring capture lists in closures.

Swift Memory Management

Priority: P0 (CRITICAL)

Implementation Guidelines

ARC Fundamentals
  • Default: Strong references. ARC handles retain/release automatically.
  • Weak: Use weak if the reference can become nil during its lifetime (delegates, optional parent refs).
  • Unowned: Use unowned if the reference is guaranteed to outlive referring object (rare; prefer weak).
Capture Lists
  • Closures: [weak self] at beginning of the closure's capture list. Pattern: { [weak self] in guard let self = self else { return } }.
  • Self in Structs: No list needed — self copied by value.
  • Multiple Captures: [weak self, weak delegate].
Retain Cycles
  • Delegates: weak var delegate always. Protocol inherits from AnyObject (e.g., protocol MyDelegate: AnyObject {})..
  • Closures as Properties: Use weak or unowned in capture list.
  • Two-way References: One side must weak.

Anti-Patterns

  • No strong var delegate: Use weak.
  • No self in escaping closures: Use [weak self].
  • No unowned unless certain: Default to weak to prevent crashes.

References

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • beginning of the closure's capture list

  • inherits from AnyObject

  • unowned if the reference is guaranteed

  • weak if the reference can become nil

  • Additional task-grounded exact anchors: retain cycle

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/swift/swift-memory-management of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/implementation.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Swift Memory Management 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.

Swift Memory Management compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Swift Memory Management this skillHoangNguyen0403/agent-skills-standard572—~484Automated safety check: PassMIT
Swiftui Protwostraws/SwiftUI-Agent-Skill5.6k2 repos~1.5kAutomated safety check: PassMIT
Swiftui UI PatternsAFK-surf/OpenBridge4304 repos~887Automated safety check: PassMIT
Swiftui Performance Auditharperreed/dotfiles3348 repos~1.4kAutomated safety check: PassNone
Swift Testing ExpertAvdLee/Swift-Testing-Agent-Skill4711 repos~1.2kAutomated safety check: PassMIT
Hig Project Contextraintree-technology/hig-doctor1445 repos~1.2kAutomated safety check: PassMIT

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Categories

Questions about Swift Memory Management

What does Swift Memory Management do?

Prevent retain cycles via ARC, weak/unowned references, and Capture Lists in Swift. Swift Memory Management is an agent skill from HoangNguyen0403/agent-skills-standard. Prevent retain cycles via ARC, weak/unowned references, and Capture Lists in Swift.

When should I use Swift Memory Management?

Swift Memory Management fits situations like: managing Swift ARC; avoiding retain cycles; configuring capture lists in closures.

How do I install Swift Memory Management in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill swift-memory-management -a claude-code`. Or copy the skill folder (skills/swift/swift-memory-management in HoangNguyen0403/agent-skills-standard) into .claude/skills/swift-memory-management in your project. Claude Code loads it when a task matches its description.

How do I install Swift Memory Management in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill swift-memory-management -a codex`. Or copy the skill folder (skills/swift/swift-memory-management in HoangNguyen0403/agent-skills-standard) into .agents/skills/swift-memory-management in your project. Codex loads it when a task matches its description.

Can I use Swift Memory Management 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 HoangNguyen0403/agent-skills-standard --skill swift-memory-management -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/swift-memory-management, .gemini/skills/swift-memory-management, .github/skills/swift-memory-management and .opencode/skills/swift-memory-management in your project.

What does Swift Memory Management need to run?

SKILL.md names no scripts, command-line tools or credentials: Swift Memory Management is instructions for the agent only.

Does Swift Memory Management access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Swift Memory Management 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 Swift Memory Management use?

Swift Memory Management is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Swift Memory Management use?

About 484 tokens (SKILL.md is roughly 1.9k 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 340 tokens, read only when the agent opens those files.

What are the alternatives to Swift Memory Management?

Skills that share tags, products or a category with Swift Memory Management: Swiftui Pro (twostraws/SwiftUI-Agent-Skill, 5.6k 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, 471 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Swift Memory Management?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.