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Swift Security · dpearson2699 | DecimalAI

securityby dpearson2699

Swift Security

dpearson2699/swift-security

Source dpearson2699/swift-ios-skills ↗License NOASSERTION

Use when working with iOS/macOS Keychain Services (SecItem queries, kSecClass, OSStatus errors), biometric authentication (LAContext, Face ID, Touch ID), CryptoKit (AES-GCM, ChaChaPoly, ECDSA, ECDH, HPKE, ML-KEM), Secure Enclave, secure credential storage (OAuth tokens, API keys), certificate pinning (SecTrust, SPKI), keychain sharing across apps/extensions, migrating secrets from UserDefaults or plists, or OWASP MASVS/MASTG mobile compliance on Apple platforms.

SkillScore95Maintained

Automatic

Security & AppSec pack

Last verified 8/14/2026

What it changes

Passed 21 of 22 test cases with the skill, and 11 of 22 without it.

Without skill50%

With skill95%

Checks it passed that the model alone missed

Includes testing-security-code.md under ## Reference Files.
Includes compliance-owasp-mapping.md under ## Reference Files.
Includes a ## Reference Files section listing keychain-sharing.md.

and 10 more in the full report

11 fixed10 passed either way0 still failing1 broke

Pass-rate lift: +45 pp
Tokens: +134%
Agent turns: 0%
Response time: +1%

Model gemini-3.6-flashMeasured 8/14/2026v121 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/dpearson2699-swift-security/SKILL.md https://app.decimal.ai/s/dpearson2699-swift-security/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dpearson2699-swift-security, 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/dpearson2699-swift-security/ and pins it in .decimal/skills.lock

decimalai skills add dpearson2699-swift-security

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

curl -fsSL --create-dirs -o .claude/skills/dpearson2699-swift-security/SKILL.md https://app.decimal.ai/s/dpearson2699-swift-security/SKILL.md

Raw file: /s/dpearson2699-swift-security/SKILL.md ↗ · machine-readable summary at /s/dpearson2699-swift-security.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

Please perform a security code review on this Swift token storage snippet. List each vulnerability along with its assigned severity level, include before-and-after code examples demonstrating the fix, specify minimum OS availability for any recommended security APIs, and end your response with a `## Reference Files` section listing the relevant reference documents.

What was checked, without and with the skill
Checked	Without skill	With skill
Assigns explicit severity ratings using CRITICAL, HIGH, or MEDIUM for each discovered flaw.	Missed	Passed
Includes a ## Reference Files section at the end listing supporting security reference documents.	Missed	Passed
Provides before-and-after Swift code snippets demonstrating the fix.	Missed	Passed

case-01 · gemini-3.6-flash · 8/14/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md227 lines15 files

Swift Security

Use this skill for client-side Apple platform security work: Keychain Services, access control, biometric-gated secrets, CryptoKit, Secure Enclave keys, credential storage, certificate trust, keychain sharing, legacy secret migration, security testing, and OWASP mobile compliance mapping.

Default to iOS 17+ and Swift concurrency examples when the deployment target is unknown. Keep iOS 13+ compatibility notes when the user asks for older targets. Treat iOS 26 CryptoKit post-quantum APIs as availability-gated.

Workflow
Reference Loading
Security Invariants
Sibling Boundaries
Review Checklist
Common Mistakes
Output Rules
References

Workflow

Classify the request before loading references.

Review existing code: run the Review Checklist, then load common-anti-patterns.md plus the domain reference for each failing area. Report severity, evidence, and the corrected pattern.
Improve or migrate code: identify the migration type, load the migration and target-domain references, preserve existing data, verify the new item, then remove legacy storage only after success.
Implement new security code: load the minimum domain references, use the provided correct patterns, include OSStatus handling and tests, then run the relevant checklist.

Do not load every reference file by default. This skill is intentionally split for progressive disclosure; load only the files needed by the user's task.

Track record

Benchmark

21 / 22

test cases passed, vs 11 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan14 of 15 checks clean

0 critical · 0 warning · 1 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

No issues (informational notes only).

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dpearson2699 / swift-ios-skills

skills/swift-security/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 14 files

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

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See it in action

What's inside

Swift Security

Contents

Workflow

Track record

Benchmark

Adoption

SkillSafety

Source

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