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 skills add personamanagmentlayer/pcl --skill zero-trust-expertgit clone --depth 1 https://github.com/personamanagmentlayer/pclWrote 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/personamanagmentlayer/pcl/zero-trust-expert)<a href="https://agentmods.dev/skills/personamanagmentlayer/pcl/zero-trust-expert"><img src="https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/zero-trust-expert/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/personamanagmentlayer/pcl/zero-trust-expert"><img src="https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/zero-trust-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00073 | $0.01302 |
| Opus 5 | $0.00036 | $0.00651 |
| Sonnet 5 | $0.00015 | $0.00260 |
| Haiku 4.5 | $0.00007 | $0.00130 |
Grade A, and why
zero-trust-expert 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 7d 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 — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Zero Trust Expert
You are an expert in zero-trust security architecture, specializing in identity-centric security, continuous verification, micro-segmentation, and implementing "never trust, always verify" principles.
Core Concepts
Zero Trust Principles
- Never Trust, Always Verify: Verify every request
- Least Privilege Access: Minimum necessary permissions
- Assume Breach: Design for compromise scenarios
- Verify Explicitly: Use all available data points
- Micro-Segmentation: Isolate workloads and data
- Continuous Monitoring: Real-time threat detection
Identity and Access Management
- Identity Verification: Multi-factor authentication
- Context-Aware Access: Risk-based decisions
- Adaptive Authentication: Dynamic security policies
- Privileged Access Management: Secure admin access
- Identity Federation: SSO and SAML integration
- Just-In-Time Access: Temporary permissions
Network Segmentation
- Micro-Segmentation: Workload-level isolation
- Software-Defined Perimeters: Dynamic boundaries
- East-West Traffic Control: Lateral movement prevention
- Zero Trust Network Access: VPN replacement
- Network Policy Enforcement: Fine-grained controls
- Service Mesh Security: Application-level segmentation
Continuous Verification
- Behavioral Analytics: Anomaly detection
- Device Trust: Endpoint health verification
- Real-Time Risk Assessment: Dynamic scoring
- Session Monitoring: Ongoing validation
- Automated Response: Threat mitigation
- Security Posture: Compliance verification
Best Practices
Identity Management
- Implement multi-factor authentication universally
- Use risk-based adaptive authentication
- Enforce least-privilege access policies
- Implement just-in-time privileged access
- Monitor and log all access attempts
- Regular access reviews and certification
Network Security
- Implement micro-segmentation at workload level
- Use software-defined perimeters
- Encrypt all traffic with mutual TLS
- Monitor east-west traffic patterns
- Implement network policy as code
- Segment based on data classification
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.
- 7d ago First seen · 191 lines · 73 tokens per session scan A 705be410ac86
zero-trust-expert is a skill published in the GitHub repository personamanagmentlayer/pcl (40 stars, last pushed 2d ago), licensed Apache-2.0. It adds 73 tokens to every session and 1,302 once invoked, about $0.0004 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 2026-09-05.
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