os-signing-setup skillA
os-signing-setup is agent-read markdown (skill) from richfrem/agent-plugins-skills: Guide a human through creating the SSH signing key that authorizes the human approval gates (plan approval, code acceptance, closure): passphrase-protected key or FIDO hardware key, the allowed_signers files, the isolation status, and the interactive signing self-test, on macOS or Windows. Trigger with "set up my approval key", "create the ssh signing key", "set up signing identity", "HUMAN_PROOF_REQUIRED", "test my signing key". Never used to record decisions or advance tasks..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
<example> <commentary>The remediation error says the human has no signing key set up yet.</commentary> user: "I got HUMAN_PROOF_REQUIRED and failed_checks lists missing files, what do I do?" assistant: Points the human at the read-only status command, then the guided setup, and waits; never runs it. </example> <example> <commentary>The human wants to prove the key works before an approval.</commentary> user: "Test my signing key works." assistant: Gives the exact self-test command for the human's own terminal and explains the prompt to expect. </example> # OS Signing Setup ## Purpose The three human gates (Gate 1 `AWAITING_APPROVAL -> APPROVED`, Gate 3 `-> VERIFY_EXIT`, and closure `-> DONE`) each need a cryptographic approval from a human's SSH key. This skill takes the human through creating that key and proving it works. The key is an **SSH key (SSHSIG)**, not an X.509 certificate; its `SHA256:` fingerprint is the thumbprint analogue. ## Hard rules for the agent 1. **Never run the setup or the self-test yourself.** They are human tools: they refuse to run without a terminal and as the agent account. Give the human the exact commands and wait. …
Read the whole file at its exact version.
How to install
mdr add richfrem/agent-plugins-skills/os-signing-setup@git:20260920.0152adamdr add richfrem/agent-plugins-skills/os-signing-setup@sha256:142fc2f3e7cf37efPin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_prkh5rdqxj6zz5sv)
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Versions
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 (4845 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
richfrem/agent-plugins-skills · 6 stars · license MIT · pushed 2026-09-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_prkh5rdqxj6zz5sv GET https://markdownregistry.com/api/v1/resolve?ref=richfrem/agent-plugins-skills/os-signing-setup GET https://markdownregistry.com/api/v1/blob/142fc2f3e7cf37efc258fc413821b053255f2604caeca80b581d92b6892c194d
Your agent 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.