agentmods.dev

swiftdata

swiftdata is a skill for Claude Code from robbyt/claude-skills. It costs 127 tokens per session (2,540 once invoked), scanned A, original, no licence file.

A development guide for SwiftData, Apple's framework for storing and querying app data. It covers data models, queries, relationships, storage containers, migrations, concurrency, performance, and architecture.

In plain words
What is it for?
Use it to review or troubleshoot SwiftData models, predicates, crashes, schema migrations, Swift 6 concurrency, performance, and app architecture.
Why use it?
It helps find and resolve problems in how an app defines, stores, queries, updates, and migrates its data.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the swift plugin — 1 skill shipped together

not rated 42repo 28d ago A scan 127 tokens no licence

Good fit Use it to review or troubleshoot SwiftData models, predicates, crashes, schema migrations, Swift 6 concurrency, performance, and app architecture.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/robbyt/claude-skills/swiftdata
View source ↗ robbyt/claude-skills
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 robbyt/claude-skills --skill swiftdata
Clone the repo
git clone --depth 1 https://github.com/robbyt/claude-skills

Made for: Claude Code.

Or install swift, the plugin that ships this one along with the rest of its 1 skill.

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 swiftdata

README.md
[![agentmods](https://agentmods.dev/badge/skills/robbyt/claude-skills/swiftdata/github.svg)](https://agentmods.dev/skills/robbyt/claude-skills/swiftdata)
Your own site
<a href="https://agentmods.dev/skills/robbyt/claude-skills/swiftdata"><img src="https://agentmods.dev/badge/skills/robbyt/claude-skills/swiftdata/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 swiftdata

Your own site · 80×15
<a href="https://agentmods.dev/skills/robbyt/claude-skills/swiftdata"><img src="https://agentmods.dev/badge/skills/robbyt/claude-skills/swiftdata.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 127 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,540 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00127 $0.02540
Opus 5.5 $0.00051 $0.01016
Sonnet 5.5 $0.00025 $0.00508
Haiku 4.5 $0.00013 $0.00254

Measured 2mo ago against content hash 8603cad9fd92, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

swiftdata scanned grade A with 0 findings 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 2mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/swift/skills/swiftdata/SKILL.md · 182 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 182 lines · 127 tokens per session scan A 8603cad9fd92

Subscribe to this mod's changes

swiftdata is a skill published in the GitHub repository robbyt/claude-skills (42 stars, last pushed 28d ago), with no licence file. It adds 127 tokens to every session and 2,540 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Databases
Related

swiftdata compared with skills from other repositories

swiftdata next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
swiftdatarobbyt/claude-skillsSkill4228d agononeA127Claude Code
create-prprisma/ormSkill48kyesterdayApache-2.0A48Claude Code, Codex
schema-explorationlangchain-ai/deepagentsSkill31ktodayMITA57Claude Code, Codex
atlas-mssqlariga/atlasSkill8.8k3d agoApache-2.0A163Claude Code
ha-data-storesshiwenwen/hope-agentSkill1.9ktodayMITA115Claude Code, Codex
nornicdb-cypher-queriesorneryd/NornicDBSkill924todayMITA79Claude Code, Codex
volcengine-rds-postgresqlbytedance/agentkit-samplesSkill4842d agoApache-2.0A63Claude Code, Codex