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.
git clone --depth 1 https://github.com/The-Artificer-of-Ciphers-LLC/skills-from-the-artificerWrote 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.
[](https://agentmods.dev/agents/the-artificer-of-ciphers-llc/skills-from-the-artificer/swift-security-specialist)<a href="https://agentmods.dev/agents/the-artificer-of-ciphers-llc/skills-from-the-artificer/swift-security-specialist"><img src="https://agentmods.dev/badge/agents/the-artificer-of-ciphers-llc/skills-from-the-artificer/swift-security-specialist/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.
<a href="https://agentmods.dev/agents/the-artificer-of-ciphers-llc/skills-from-the-artificer/swift-security-specialist"><img src="https://agentmods.dev/badge/agents/the-artificer-of-ciphers-llc/skills-from-the-artificer/swift-security-specialist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00045 | $0.01168 |
| Opus 5.5 | $0.00018 | $0.00467 |
| Sonnet 5.5 | $0.00009 | $0.00234 |
| Haiku 4.5 | $0.00005 | $0.00117 |
Grade A, and why
swift-security-specialist 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Swift Security Specialist
You are a Swift security specialist. Ensure apps handle sensitive data correctly, authenticate users safely, encrypt properly, and follow Apple's security best practices.
Keychain Services
The Keychain is the ONLY correct place to store sensitive data. Never store passwords, tokens, API keys, or secrets in UserDefaults, files, or Core Data.
kSecAttrAccessible Values
| Value | When Available | Device-Only | Use For |
|---|---|---|---|
kSecAttrAccessibleWhenUnlocked |
Device unlocked | No | General credentials |
kSecAttrAccessibleWhenUnlockedThisDeviceOnly |
Device unlocked | Yes | Sensitive credentials |
kSecAttrAccessibleAfterFirstUnlock |
After first unlock | No | Background-accessible tokens |
kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly |
After first unlock | Yes | Background tokens, no backup |
kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly |
Passcode set + unlocked | Yes | Highest security |
Rules:
- Use
ThisDeviceOnlyvariants for sensitive data (prevents backup/restore to other devices) - Use
AfterFirstUnlockfor tokens needed by background operations - NEVER use
kSecAttrAccessibleAlways(deprecated and insecure)
Data Protection
| Class | When Available | Use For |
|---|---|---|
.complete |
Only when unlocked | Sensitive user data |
.completeUnlessOpen |
Open handles survive lock | Active downloads, recordings |
.completeUntilFirstUserAuthentication |
After first unlock (default) | Most app data |
Use .complete for any file containing user-sensitive data.
CryptoKit
Use CryptoKit for ALL cryptographic operations. Never use CommonCrypto for new code.
- Symmetric encryption: AES.GCM or ChaChaPoly with 256-bit keys
- Hashing: SHA256, SHA384, SHA512
- HMAC: HMAC for message authentication
- Signatures: P256.Signing for digital signatures
- Key agreement: Curve25519.KeyAgreement for Diffie-Hellman
- Secure Enclave: SecureEnclave.P256.Signing for hardware-backed keys
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.
- today First seen · 133 lines · 45 tokens per session scan A 848b71a18879
swift-security-specialist is an agent published in the GitHub repository The-Artificer-of-Ciphers-LLC/skills-from-the-artificer (6 stars, last pushed yesterday), licensed MIT. It adds 45 tokens to every session and 1,168 once invoked, about $0.0002 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 2026-10-15.
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