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SwiftData Skills · rshankras | DecimalAI

codingby rshankras

SwiftData Skills

rshankras/swiftdata

Source rshankras/claude-code-apple-skills ↗License MIT

SwiftData skills — class inheritance patterns for hierarchical models, type-based querying, polymorphic relationships, and inheritance-vs-enum decisions.

NewMaintained

Automatic

Coding pack

Last verified 8/18/2026

What it changes

Passed 4 of 22 test cases with the skill, and 5 of 22 without it.

Without skill23%

With skill18%

0 fixed4 passed either way17 still failing1 broke

Pass-rate lift: -5 pp
Tokens: -4%
Agent turns: 0%
Response time: -7%

Model gemini-3.6-flashMeasured 8/18/2026v14 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/rshankras-swiftdata/SKILL.md https://app.decimal.ai/s/rshankras-swiftdata/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add rshankras-swiftdata, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/rshankras-swiftdata/ and pins it in .decimal/skills.lock

decimalai skills add rshankras-swiftdata

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/rshankras-swiftdata/SKILL.md https://app.decimal.ai/s/rshankras-swiftdata/SKILL.md

Raw file: /s/rshankras-swiftdata/SKILL.md ↗ · machine-readable summary at /s/rshankras-swiftdata.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

What's inside

The instructions your model reads when the skill loads.

SKILL.md24 linessingle file

SwiftData Skills

SwiftData modeling patterns beyond the basics.

When This Skill Activates

Use this skill when the user:

Designs hierarchical SwiftData models (class inheritance)
Needs type-based or polymorphic queries
Weighs inheritance vs enum for model variants

Available Skills

Paths are relative to THIS file's directory — skills run with cwd set to the user's project, so resolve each path from this SKILL.md's own location.

Skill	Read	Covers
inheritance	`inheritance/SKILL.md`	Class inheritance, polymorphic relationships, type-based querying, inheritance-vs-enum

How to Route

Read inheritance/SKILL.md (relative to this file) plus any reference files it lists.
Apply the guidance to the user's code. For broader macOS SwiftData architecture, see also ../macos/swiftdata-architecture/SKILL.md.

Track record

Benchmark

4 / 22

test cases passed, vs 5 / 22 without

Adoption

Users: 1
Times used: 14

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

rshankras / claude-code-apple-skills

skills/swiftdata/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

rshankras/swiftdata-inheritanceSwiftData class inheritance patterns for hierarchical models with type-based querying, polymorphic relationships, and when to choose inheritance vs enums. Use when designing SwiftData model hierarchies.Close match+27 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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What's inside

SwiftData Skills

When This Skill Activates

Available Skills

How to Route

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills