Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add haabe/mycelium/plugin install myceliumWrote 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/haabe/mycelium/security-review)<a href="https://agentmods.dev/skills/haabe/mycelium/security-review"><img src="https://agentmods.dev/badge/skills/haabe/mycelium/security-review.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 | $0.00024 | $0.01670 |
| Opus 5 | $0.00012 | $0.00835 |
| Sonnet 5 | $0.00005 | $0.00334 |
| Haiku 4.5 | $0.00002 | $0.00167 |
Grade B, and why
security-review scanned grade B with 1 finding 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 6d 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.
Instruction-override phrasingmediumPrompt injection
Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.
- [ ] **LLM01 Prompt Injection**: User input (direct or indirect) cannot override system instructions Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Review
Language-agnostic security review based on OWASP Secure by Design.
Checklist (OWASP Top 10:2025)
Updated to OWASP Top 10:2025 (released January 2025). Previous 2021 edition had different groupings.
A01:2025 — Broken Access Control
- Least privilege enforced (users get minimum permissions needed)
- Authorization checked on EVERY request (not just the first)
- CORS restrictive (not
*) - Directory listing disabled
- Rate limiting on API/controller access
A02:2025 — Cryptographic Failures
- Data encrypted at rest and in transit (TLS 1.2+)
- No secrets in code, logs, or error messages
- PII identified and classified in threat model
- Passwords hashed with bcrypt/argon2 (never MD5/SHA1)
- Cryptographic algorithms current (no deprecated ciphers)
A03:2025 — Injection
- All user input validated (type, length, range, format)
- Parameterized queries for ALL data access (never string concatenation)
- Input allowlisting preferred over denylisting
- Output encoded based on context (HTML, JS, URL, CSS — covers XSS)
- Content Security Policy configured
A03b:2025 — Software Supply Chain Failures (new in 2025)
- SBOM (Software Bill of Materials) maintained for critical dependencies
- Build integrity verified (reproducible builds, signed artifacts)
- Dependency provenance checked (not just version, but source authenticity)
- Transitive dependencies audited (not just direct)
- Lock files committed and verified
A04:2025 — Insecure Design
- Threat modeling performed (STRIDE — see /mycelium:threat-model)
- Secure design patterns used (defense in depth, fail secure)
- Business logic abuse cases considered
- Security requirements defined alongside functional requirements
A05:2025 — Security Misconfiguration
- Default credentials changed
- Unnecessary features/ports disabled
- Security headers set (CSP, HSTS, X-Frame-Options, X-Content-Type-Options)
- Error handling does not expose stack traces
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.
- 6d ago First seen · 121 lines · 24 tokens per session scan B d85ded3cd720
security-review is a skill published in the GitHub repository haabe/mycelium (45 stars, last pushed yesterday), licensed MIT. It adds 24 tokens to every session and 1,670 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (instruction-override phrasing). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
context-manager
Context management skill providing discovery, fetching, harvesting, extraction, compression, organization, cleanup, and guided workflows for project context.
meraki-network-ops
Cisco Meraki organization and network operations (read-only) — org discovery, network inventory, device inventory, clients, group policies, admins, licensing, alert settings via Cisco's official Meraki MCP. Use as the entry point for any Meraki question, to discover org and network IDs, or to inventory Meraki networks…
auto
Intent-classified router, the front door to OrchestKit and the DEFAULT entry point for any goal-shaped request. Classifies a plain-English goal and routes it to the right specialist skill. Routing is never overhead, so use it even when the target skill seems obvious; skip only when already executing inside another…
gingiris-user-interview
🇺🇸 User Interview & Cold-Start Operations Playbook — Battle-tested framework from HeyGen's 937 interviews to PMF. Complete SOP for user screening, interview execution, Beta testing methodology, cold-start user operations, churn analysis, and user grading systems. 🇨🇳 用户访谈与冷启动运营实战手册 — 基于 HeyGen 937 场访谈验证的 PMF…
tao-setup
One-time session setup and orchestration map for the TAO skill bank. Run this first when the TAO skills were installed individually (e.g. from a public skills catalog) so the session gets the cross-skill discovery flow, credential checks, and host preflight that the bundled plugin hook would otherwise inject…
tao-list-capabilities
Answer what the TAO Skill Bank plugin can do by generating the response from packaged application, data, model, AutoML, and platform manifests. Use when the user asks "what can TAO Skill Bank do", "list TAO models", "which TAO workflows are available", or "what supports AutoML".