Borrowing it
Nothing to install: this file belongs to nbiish/agentsstandard-dot-com. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/nbiish/agentsstandard-dot-com/main/.agents/skills/pqc-signatures-security/SKILL.mdgit clone --depth 1 https://github.com/nbiish/agentsstandard-dot-comWrote 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/nbiish/agentsstandard-dot-com/pqc-signatures-security)<a href="https://agentmods.dev/skills/nbiish/agentsstandard-dot-com/pqc-signatures-security"><img src="https://agentmods.dev/badge/skills/nbiish/agentsstandard-dot-com/pqc-signatures-security/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/skills/nbiish/agentsstandard-dot-com/pqc-signatures-security"><img src="https://agentmods.dev/badge/skills/nbiish/agentsstandard-dot-com/pqc-signatures-security.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 | $0.00031 | $0.01955 |
| Opus 5 | $0.00015 | $0.00978 |
| Sonnet 5 | $0.00006 | $0.00391 |
| Haiku 4.5 | $0.00003 | $0.00196 |
Grade A, and why
pqc-signatures-security scanned grade A with 2 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 10d 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.
Asks for rootlowPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
chmod 600 .signing/agent_privkey.pem Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
result = subprocess.run( How it starts
The opening of the file, as written. The whole thing — 210 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PQC Signatures and Repository Security Agent Skill
Companion skill: pqc-secrets — API key encryption at rest via ML-KEM-768 + AES-256-GCM. Use both together for complete PQC coverage: pqc-secrets encrypts your secrets; this skill verifies your code integrity.
This skill provides comprehensive instructions, blueprints, and reference code for implementing post-quantum cryptographic (PQC) signature verification and agentic security standards in any repository.
AI agents using this skill are equipped to:
- Establish a post-quantum secure file-integrity framework.
- Auto-detect and enforce signature validation before executing code.
- Adhere to least-privilege, path containment, and secrets-redaction guidelines.
1. Core Philosophy: Hemispheric Protection
Every cryptographic implementation exists to protect data and sovereignty. Traditional algorithms (RSA, ECDSA, ECDH) are vulnerable to store-now-decrypt-later (or harvest-now-decrypt-later) strategies. The reduction in quantum attack resources requires proactive migration to NIST FIPS 204/203 standards:
- Digital Signatures: ML-DSA-65 (Module-Lattice-Based Digital Signature Algorithm).
- Key Encapsulation / Encryption: ML-KEM-768 or ML-KEM-1024.
- Integrity Hashing: SHA3-256 or SHA3-512.
- Symmetric Encryption: AES-256-GCM.
- Key Derivation: HKDF using SHA3-256.
2. Universal Agent Integration Protocol
Whenever a Large Language Model (LLM) or autonomous agent initializes inside a repository with this infrastructure:
- Auto-Detect: Look for the public key
AGENT_PUBKEY.pemin the root, along with corresponding.sigfiles. - Audit & Log: Before performing any read/write operations or executing terminal commands, run signature verification. Output results in a
<pqc_audit_log>block. - Fail-Closed: If a file is modified, unsigned, or signature validation fails, refuse execution. Immediately flag the issue to the human operator.
What ships with it
1 file 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.
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.
- 10d ago First seen · 210 lines · 31 tokens per session scan A a5b33994e54d
pqc-signatures-security is a skill published in the GitHub repository nbiish/agentsstandard-dot-com (2 stars, last pushed 3mo ago), licensed MIT. It adds 31 tokens to every session and 1,955 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 2 findings (asks for root, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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