AGENTS.mdA

AGENTS.md from bigcactuslabs/dead-letter is an AGENTS.md file: the standing instructions coding agents read in that repo.

Install it, pinned
mdr add bigcactuslabs/dead-letter/AGENTS.md@git:20261106.1859817

Pins git:20261106.1859817 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 14 of 14 checks passed
Kind
AGENTS.md file
Repository
bigcactuslabs/dead-letter
Path
AGENTS.md
Versions recorded
13
Latest version
git:20261106.1859817, committed Nov 6, 2026
First version recorded
Sep 19, 2026
Size
9,632 bytes
Repository stars
8
License
a license file GitHub does not identify

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

# AGENTS.md

Operational guide for AI coding agents working in this repository. For the full
human contributor workflow, see [CONTRIBUTING.md](CONTRIBUTING.md).

## What this repo is

dead-letter converts `.eml` email files to Markdown with YAML front matter,
built for LLM pipelines (Python 3.12+, managed with uv). CLI, UI, Python API,
and stdio MCP share the package. MCPB and OCI package the MCP runtime; the
Claude plugin and portable skill provide distinct agent integrations.

Start with the [docs index](docs/README.md). For installation choices use the
[distribution map](docs/reference/distribution.md); for tagging or channel
changes read [Publishing](docs/reference/publishing.md). Source on `main` may
be ahead of the published package. Never promote pending PR work to a shipped
capability in user-facing docs.

## Repo map

- `src/dead_letter/core/` — MIME parse → sanitize → thread/zone → Markdown render; `mbox*.py` and `stream_report.py` stream `.mbox` imports through the same pipeline; `snapshot.py` exposes a read-only parsed snapshot for analysis
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add bigcactuslabs/dead-letter/AGENTS.md@sha256:4fdf95d18d628e51

The line at the top of this page pins the label git:20261106.1859817, 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_sibnreziskcf67mj.svg)](https://markdownregistry.com/a/art_sibnreziskcf67mj)

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

Versions

The registry has recorded 13 versions of this file, between Sep 19, 2026 and Nov 6, 2026, about one every 4 days.

versioncommittedcommitsizeaudit
git:20261106.1859817 latest2026-11-06 1859817 9,632 BA view · diff
git:20261104.0d9dd612026-11-04 0d9dd61 9,417 BA view · diff
git:20261022.603305f2026-10-22 603305f 9,269 BA view · diff
git:20261020.f7b17482026-10-20 f7b1748 9,274 BA view · diff
git:20261009.69b229c2026-10-09 69b229c 9,208 BA view · diff
git:20261008.00379032026-10-08 0037903 9,208 BA view · diff
git:20261007.886de8e2026-10-07 886de8e 9,153 BA view · diff
git:20261007.73455a12026-10-07 73455a1 9,031 BA view · diff
git:20260928.c1a34672026-09-28 c1a3467 8,757 BA view · diff
git:20260924.02406002026-09-24 0240600 8,749 BA view · diff
git:20260921.84def352026-09-21 84def35 8,579 BA view · diff
git:20260919.e80d5242026-09-19 e80d524 7,871 BA view · diff
git:20260919.d2b00162026-09-19 d2b0016 7,024 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 (9632 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

bigcactuslabs/dead-letter · 8 stars · license a license file GitHub does not identify · pushed 2026-11-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_sibnreziskcf67mj
GET https://markdownregistry.com/api/v1/resolve?ref=bigcactuslabs/dead-letter/AGENTS.md
GET https://markdownregistry.com/api/v1/blob/4fdf95d18d628e51f3104b7ab5e71f0ead7680a2aa6badb4fa4009d48853c279

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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bigcactuslabs/dead-letter · plugin/skills/dead-letter-context/SKILL.md · Primes Claude with the dead-letter plugin's commands and runtime conventions when the user is working with .eml email…
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