AGENTS.md@assistantA

AGENTS.md@assistant from vellum-ai/vellum-assistant is an AGENTS.md file: the standing instructions coding agents read in that repo.

Install it, pinned
mdr add vellum-ai/vellum-assistant/assistant/AGENTS.md@git:20260916.ebad791

Pins git:20260916.ebad791 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/AGENTS.md
Versions recorded
10
Latest version
git:20260916.ebad791, committed Sep 16, 2026
First version recorded
Aug 17, 2026
Size
15,167 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

# Assistant Service — Agent Instructions

For error handling conventions (throw vs result objects vs null), see [docs/error-handling.md](docs/error-handling.md).

Subdirectory-scoped rules live in local AGENTS.md files throughout `src/`, some
of them nested several levels down. Read the one nearest the code you are
changing plus any above it, and follow the nearest where two disagree.
`git ls-files ':(top)assistant/src/**/AGENTS.md'` lists them from anywhere in
the tree.

## Adding new environment variables

When you introduce a new env var that the assistant process needs to read at runtime, **update `src/tools/terminal/safe-env.ts`** as well.

`safe-env.ts` maintains the allowlist of env vars that are forwarded to agent-spawned child processes (bash tool, skill sandbox, etc.). Anything not on the list is stripped to prevent credential leakage. If your new var is needed by commands the agent runs, it must be added.

**Default to including it.** If the var doesn't contain secrets (e.g. a URL, a feature flag, a path, a mode string), add it. Only omit it if it carries credential material (tokens, passwords, private keys) — those must stay isolated to CES.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add vellum-ai/vellum-assistant/assistant/AGENTS.md@sha256:ccbc34c5f5806b17

The line at the top of this page pins the label git:20260916.ebad791, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_enmhiwhtqi4qpppy.svg)](https://markdownregistry.com/a/art_enmhiwhtqi4qpppy)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 10 versions of this file, between Aug 17, 2026 and Sep 16, 2026, about one every 3 days.

versioncommittedcommitsizeaudit
git:20260916.ebad791 latest2026-09-16 ebad791 15,167 BA view · diff
git:20260914.e44e5702026-09-14 e44e570 15,377 BA view · diff
git:20260910.e3b8f592026-09-10 e3b8f59 15,230 BA view · diff
git:20260909.3257e322026-09-09 3257e32 14,904 BA view · diff
git:20260909.8fcd05d2026-09-09 8fcd05d 14,857 BA view · diff
git:20260821.7298fc92026-08-21 7298fc9 14,726 BA view · diff
git:20260820.fcf04232026-08-20 fcf0423 14,603 BA view · diff
git:20260818.7cfc7e32026-08-18 7cfc7e3 14,388 BA view · diff
git:20260817.0a74afd2026-08-17 0a74afd 14,368 BA view · diff
git:20260817.72c008d2026-08-17 72c008d 14,244 BA view

Audit of the latest version

A  14 of 14 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Size between 200 bytes and 200 KB (15167 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

GitHub

vellum-ai/vellum-assistant · 1,483 stars · license MIT · pushed 2026-11-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_enmhiwhtqi4qpppy
GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/assistant/AGENTS.md
GET https://markdownregistry.com/api/v1/blob/ccbc34c5f5806b1728bf8fe487f08efb76420b311432a2af6065deb89677d6df

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.

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