AGENTS.md@packages/harnessA

This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.

AGENTS.md@packages/harness from roasbeef/loom is an AGENTS.md file: the standing instructions coding agents read in that repo.

Install it, pinned
mdr add roasbeef/loom/packages/harness/AGENTS.md@git:20261020.8e8431b

Pins git:20261020.8e8431b in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 14 of 14 checks passed
Kind
AGENTS.md file
Repository
roasbeef/loom
Path
packages/harness/AGENTS.md
Versions recorded
4
Latest version
git:20261020.8e8431b, committed Oct 20, 2026
First version recorded
Oct 19, 2026
Size
7,837 bytes
Repository stars
11
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

# harness

## Purpose

Loom's session runtime without the daemon. `runtime/api.open` takes a
`Session` and an `Effects` record, and the provider half of that record, the
routing and admission which turn a `RequestSpec` into a gateway call, used to
exist only inside `client/wiring`. This package is that half, extracted
(issue #1030, `docs/design-notes/harness-extraction.md`), plus a typed front
door, `harness.new`, and an assembly, `harness.effects`, for a program which
embeds a session in its own process. lightninglabs/aegis, a continuous
security-review service, is the first such program: one session per job, with
custom tools, its own system prompt and an in-memory session.

`client/wiring` is the second caller. It builds the same records from its
daemon `Config` and keeps the daemon-only parts: the notes checkpoint and the
compaction hooks, directory and permission grants, the escalation plane, tool
placement across machines and the holder process.

## Key Types

- `harness.Settings` and `harness.HarnessConfig` — plain data in, opaque value
  out. `settings(..)` fills the defaults (the `Main` role, no model facts
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add roasbeef/loom/packages/harness/AGENTS.md@sha256:022bce6591ab15b6

The line at the top of this page pins the label git:20261020.8e8431b, 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_5vcgpicadbghy6ku.svg)](https://markdownregistry.com/a/art_5vcgpicadbghy6ku)

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

Versions

The registry has recorded 4 versions of this file, between Oct 19, 2026 and Oct 20, 2026, more than one a day.

versioncommittedcommitsizeaudit
git:20261020.8e8431b latest2026-10-20 8e8431b 7,837 BA view · diff
git:20261019.7cb971d2026-10-19 7cb971d 7,472 BA view · diff
git:20261019.802d63d2026-10-19 802d63d 7,460 BA view · diff
git:20261019.c2adaa12026-10-19 c2adaa1 7,256 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 (7837 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

roasbeef/loom · 11 stars · license MIT · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_5vcgpicadbghy6ku
GET https://markdownregistry.com/api/v1/resolve?ref=roasbeef/loom/packages/harness/AGENTS.md
GET https://markdownregistry.com/api/v1/blob/022bce6591ab15b67ccadbfb8c177ebab5f0e9e0997e1bc244576b5cf6419028

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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AGENTS.md AGENTS.md file
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CLAUDE.md CLAUDE.md file
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AGENTS.md@packages/broker AGENTS.md file
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AGENTS.md@packages/cap AGENTS.md file
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CLAUDE.md@packages/cap CLAUDE.md file
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Every file in roasbeef/loom

Other files named AGENTS.md@packages/harness

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