ai-agent-security SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
ai-agent-security from francostino/opencode-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add francostino/opencode-skills-collection/ai-agent-security@v2.0Pins v2.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- francostino/opencode-skills-collection
- Path
bundled-skills/ai-agent-security/SKILL.md- Versions recorded
- 1
- Latest version
- v2.0, committed Sep 21, 2026
- Size
- 14,137 bytes
- Repository stars
- 87
- License
- MIT
Secure AI agents against prompt injection, tool abuse, and data exfiltration.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# AI Agent Security Protect agentic AI systems from adversarial input, unsafe tool execution, data leakage, and privilege abuse with layered security controls. ## Prerequisites - Python 3.10+ for guardrail code examples - Docker or Podman for sandbox execution - OpenTelemetry collector for audit logging - Familiarity with your agent framework (LangChain, CrewAI, Autogen, custom) - Access to policy engine (OPA/Cedar) for permission boundaries ## Threat Model — STRIDE for AI Agents AI agents introduce a unique threat surface. Apply STRIDE specifically to agentic components: | Threat | Agent-Specific Example | Control | |--------|----------------------|---------| | **Spoofing** | Attacker crafts input that mimics a trusted internal tool response | Signed tool responses, HMAC verification | | **Tampering** | Prompt injection modifies agent reasoning mid-chain | Input validation, prompt armoring | | **Repudiation** | Agent takes destructive action with no audit trail | Immutable structured logging | | **Information Disclosure** | Agent leaks PII, secrets, or internal architecture in responses | Output filtering, content classifiers | …
Read the whole file at its exact version.
How to install
mdr add francostino/opencode-skills-collection/ai-agent-security@sha256:66776bd8ae1842abThe line at the top of this page pins the label v2.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_pm5oedrfxagyeini)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 21, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (14137 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
francostino/opencode-skills-collection · 87 stars · license MIT · pushed 2026-10-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pm5oedrfxagyeini GET https://markdownregistry.com/api/v1/resolve?ref=francostino/opencode-skills-collection/ai-agent-security GET https://markdownregistry.com/api/v1/blob/66776bd8ae1842abae34b6bfebf2d4c3915bb89139d1586516eacb5088619cc8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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