AGENTS.md@assistant/src/securityA
AGENTS.md@assistant/src/security from vellum-ai/vellum-assistant is an AGENTS.md file: the standing instructions coding agents read in that repo.
mdr add vellum-ai/vellum-assistant/assistant/src/security/AGENTS.md@git:20260728.89ca052Pins git:20260728.89ca052 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 14 of 14 checks passed
- Kind
- AGENTS.md file
- Repository
- vellum-ai/vellum-assistant
- Path
assistant/src/security/AGENTS.md- Versions recorded
- 3
- Latest version
- git:20260728.89ca052, committed Jul 28, 2026
- First version recorded
- Mar 25, 2026
- Size
- 2,786 bytes
- Repository stars
- 1,483
- License
- MIT
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
# Security — Agent Instructions ## Integration API Key Patterns When adding a new third-party integration, check whether the service uses a recognizable API key prefix (e.g., `lin_api_`, `sk-ant-`, `ghp_`). If it does, add a corresponding entry to `PREFIX_PATTERNS` in `packages/service-contracts/src/secret-detection.ts` (`@vellumai/service-contracts/secret-detection`). This is the single source of truth for prefix-based secret detection — ingress blocking, tool output scanning, log redaction, and the web composer guard all consume this list. `secret-patterns.ts` in this directory is a re-export that preserves existing daemon import paths. OAuth-only services with opaque access tokens (no fixed prefix) do not need a pattern. ## Fencing Untrusted Content **Any string the assistant did not author must cross into model context inside an `<external_content>` fence.** Wrap it with `wrapUntrustedContent()` from `untrusted-content.ts`, which delimits it as third-party data, escapes attempts to close the fence from inside, and caps its size. …
Read the whole file at its exact version.
How to install
mdr add vellum-ai/vellum-assistant/assistant/src/security/AGENTS.md@sha256:e97d1609c57eeb5dThe line at the top of this page pins the label git:20260728.89ca052, 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_pfb5b2dkwcbct6ys)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Mar 25, 2026 and Jul 28, 2026, about one every 63 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260728.89ca052 latest | 2026-07-28 | 89ca052 | 2,786 B | A | view · diff |
| git:20260724.ecced08 | 2026-07-24 | ecced08 | 741 B | A | view · diff |
| git:20260325.c9fd5f1 | 2026-03-25 | c9fd5f1 | 537 B | A | view |
Audit of the latest version
- pass: Size between 200 bytes and 200 KB (2786 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
vellum-ai/vellum-assistant · 1,483 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pfb5b2dkwcbct6ys GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/assistant/src/security/AGENTS.md GET https://markdownregistry.com/api/v1/blob/e97d1609c57eeb5d7ebe2e7c83abf17e5040436b9cece0a1727e0d8456669e55
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: how to write a good AGENTS.md · AGENTS.md vs CLAUDE.md · which agent file does what.