ios-data-layer

ios-data-layer is a skill for Claude Code, Codex from almasumdev/awesome-ios-agent-skills. It costs 47 tokens per session (1,232 once invoked), scanned A, original, no licence file.

Guidance for designing an iOS data layer: the code that stores, retrieves, caches, synchronizes, and fetches app data. It covers repository patterns, SwiftData or Core Data, URLSession async networking, and offline-first behavior.

In plain words
What is it for?
Designing persistence, caching, networking, synchronization, and offline support in iOS apps.
Why use it?
It helps organize data access and keep apps useful when the network is unavailable.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Designing persistence, caching, networking, synchronization, and offline support in iOS apps.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/almasumdev/awesome-ios-agent-skills/ios-data-layer
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add almasumdev/awesome-ios-agent-skills --skill ios-data-layer
Clone the repo
git clone --depth 1 https://github.com/almasumdev/awesome-ios-agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ios-data-layer

README.md
[![agentmods](https://agentmods.dev/badge/skills/almasumdev/awesome-ios-agent-skills/ios-data-layer/github.svg)](https://agentmods.dev/skills/almasumdev/awesome-ios-agent-skills/ios-data-layer)
Your own site
<a href="https://agentmods.dev/skills/almasumdev/awesome-ios-agent-skills/ios-data-layer"><img src="https://agentmods.dev/badge/skills/almasumdev/awesome-ios-agent-skills/ios-data-layer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ios-data-layer

Your own site · 80×15
<a href="https://agentmods.dev/skills/almasumdev/awesome-ios-agent-skills/ios-data-layer"><img src="https://agentmods.dev/badge/skills/almasumdev/awesome-ios-agent-skills/ios-data-layer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,232 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00047 $0.01232
Opus 5 $0.00023 $0.00616
Sonnet 5 $0.00009 $0.00246
Haiku 4.5 $0.00005 $0.00123

Measured 8d ago against content hash 0c51cca8be50, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

ios-data-layer scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

return try context.fetch(descriptor).map {
.github/skills/architecture/ios-data-layer/SKILL.md · 185 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 185 lines · 47 tokens per session scan A 0c51cca8be50

Subscribe to this mod's changes

ios-data-layer is a skill published in the GitHub repository almasumdev/awesome-ios-agent-skills (1 stars, last pushed 4mo ago), with no licence file. It adds 47 tokens to every session and 1,232 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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