agent-safety SKILL.md skillA
agent-safety from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/agent-safety@git:20260729.3ecb845Pins git:20260729.3ecb845 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/agent-safety/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260729.3ecb845, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 10,578 bytes
- Repository stars
- 236
- License
- MIT
Use when bounding an LLM agent that already runs — scoping its task domain, gating tools to least privilege, defending against prompt injection in untrusted web/email/RAG text, requiring human approval on irreversible actions, capping runtime and cost, or triaging what it already did. NOT building the loop, tools, or RAG (that is `building-agents`).
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
# Agent safety You are the security review for an agent's **agency**, not for its code. The loop works, tools are wired, memory persists — your job is to make that autonomy *bounded*. If you want to review ordinary endpoints, auth, or secrets handling, that is `../secure-coding/SKILL.md` — this skill is the *Agentic* Top 10, the risks that exist only because a model has tools and autonomy. If the loop or tools do not exist yet, that is `../building-agents/SKILL.md`. You arrive *after* both. `references/threat-model.md` carries the OWASP Agentic Top 10 2026 risks mapped to the controls below, the pre-ship guardrail checklist, and the incident-triage flow for "the agent did X" — open it when you are reviewing before ship or reconstructing an incident. ## The ownership split Agent security splits into four layers — **Model · Harness · Tools · Environment**. The model provider owns only the Model layer (alignment, refusals). Everything else is yours: the Harness (loop, memory, context assembly), the Tools (what the agent can *do*), and the Environment (creds, network, blast radius). Do not outsource a layer you own to "the model is aligned." …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/agent-safety@sha256:b1e010bc563f6465The line at the top of this page pins the label git:20260729.3ecb845, 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_wvwj67sfodfd4fq6)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 2, 2026 and Jul 29, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.3ecb845 latest | 2026-07-29 | 3ecb845 | 10,578 B | A | view · diff |
| git:20260602.ebb0210 | 2026-06-02 | ebb0210 | 11,193 B | A | view |
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 (10578 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
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wvwj67sfodfd4fq6 GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/agent-safety GET https://markdownregistry.com/api/v1/blob/b1e010bc563f6465bd9e5575cc32d8b90bbee3fda4a064f95bcafa89dd415756
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.