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.
npx agentmods add skills/arbazkhan971/godmode/cryptonpx skills add arbazkhan971/godmode --skill cryptogit clone --depth 1 https://github.com/arbazkhan971/godmodeWrote 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/skills/arbazkhan971/godmode/crypto)<a href="https://agentmods.dev/skills/arbazkhan971/godmode/crypto"><img src="https://agentmods.dev/badge/skills/arbazkhan971/godmode/crypto.svg" alt="Measured on agentmods" 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 | $0.00030 | $0.02061 |
| Opus 5 | $0.00015 | $0.01030 |
| Sonnet 5 | $0.00006 | $0.00412 |
| Haiku 4.5 | $0.00003 | $0.00206 |
Grade A, and why
crypto 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crypto — Cryptography Implementation
Activate When
- User invokes
/godmode:crypto - User says "encryption", "hashing", "password storage", "bcrypt", "argon2"
- User says "key management", "digital signature", "JWT signing"
- User says "TLS setup", "HTTPS configuration", "certificate"
- When code handles sensitive data (PII, financial, health records)
Workflow
Step 1: Requirements Assessment
Classify data: at rest (passwords, PII, financial, API keys), in transit (TLS, mTLS, DB connections), integrity (signatures, HMAC, checksums), compliance (PCI-DSS, HIPAA, GDPR, FIPS).
Step 2: Algorithm Selection
Password hashing: Argon2id (m=65536, t=3, p=4) primary. bcrypt (cost 12+) fallback. NEVER MD5, SHA1, SHA256, PBKDF2 (<100K iter).
Symmetric encryption: AES-256-GCM (AEAD, general). ChaCha20-Poly1305 (software-fast). NEVER ECB, DES, 3DES, RC4, AES-CBC without HMAC.
Asymmetric: X25519 (key exchange). RSA-OAEP 2048+ (encryption). NEVER PKCS1v1.5 or RSA <2048.
Signatures: Ed25519 (primary). RS256/ES256 (JWT). NEVER RSA PKCS1v1.5 sigs, DSA.
Hashing (non-password): SHA-256 (general). BLAKE3 (modern). HMAC-SHA-256 (keyed). NEVER MD5, SHA-1.
Key derivation: Argon2id (from password). HKDF-SHA-256 (from shared secret).
Random: CSPRNG only (crypto.randomBytes, secrets, crypto/rand). NEVER Math.random().
Step 3: Encryption at Rest
Use envelope encryption: unique DEK per record (AES-256-GCM) encrypted by KEK from KMS. Store encrypted data + encrypted DEK + IV + auth tag. Unique 96-bit IV per operation. Master key in KMS. Track key version.
Database: TDE (physical theft) + column encryption (SQLi) + connection TLS (network).
Step 4: TLS Hardening
- TLS 1.2 minimum, 1.3 preferred. Disable SSLv2/v3, TLS 1.0/1.1.
- AEAD ciphers only (GCM, ChaCha20-Poly1305). ECDHE required (forward secrecy).
- ECDSA P-256 or RSA 2048+ certs. OCSP stapling. HSTS with preload.
- Test: ssllabs.com/ssltest (target A+).
Step 5: Password Hashing
Argon2id with auto-generated salt, constant-time comparison. Hash never encrypt. No length limits (allow 128+). Check breach lists. No composition rules (NIST 800-63B). Min 8 chars. Upgrade old hashes on login. Rate limit auth. Never log passwords.
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.
- 5d ago First seen · 181 lines · 30 tokens per session scan A eeeaa27babba
crypto is a skill published in the GitHub repository arbazkhan971/godmode (26 stars, last pushed 8d ago), licensed MIT. It adds 30 tokens to every session and 2,061 once invoked, about $0.0002 per session on Opus 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.
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