add-mattermost SKILL.md skillB

add-mattermost from nanocoai/nanoclaw is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add nanocoai/nanoclaw/add-mattermost@git:20261022.8a91aad

Pins git:20261022.8a91aad in mdr.lock. Pin the fingerprint instead.

Audit grade
B, 16 of 17 checks passed
Kind
SKILL.md skill
Repository
nanocoai/nanoclaw
Path
.claude/skills/add-mattermost/SKILL.md
Versions recorded
11
Latest version
git:20261022.8a91aad, committed Oct 22, 2026
First version recorded
Aug 26, 2026
Size
17,180 bytes
Repository stars
31,085
License
MIT

Add a self-hosted or cloud Mattermost bot channel through the Chat SDK bridge, reusing a healthy server when available and linking to official server setup guidance when needed.

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

# Add Mattermost Channel

Adds Mattermost DMs, channels, threads, files, reactions, and interactive
approval cards. Messages arrive over Mattermost's WebSocket; card clicks return
to NanoClaw over an authenticated HTTP callback. Every step is safe to re-run.

## Discover the server first

Do this before installing the adapter or asking for a URL. The goal is to
reuse a healthy Mattermost the user already has and establish one canonical
base URL.

1. Check an existing `MATTERMOST_BASE_URL` in the current environment and
   NanoClaw env/config files. Do not print tokens or dump whole env files.
2. Probe likely local URLs, at least `http://localhost:8065` and
   `http://127.0.0.1:8065`, using `GET /api/v4/system/ping`. A listening port
   alone is not evidence that the service is Mattermost.
3. Inspect Docker/Compose for Mattermost containers. If a matching container
   exists but is stopped, offer to start it with its original mechanism; do not
   start or recreate it without the user's approval.
4. If you find a healthy server, show its URL and ask the user to use it or
   enter a different URL. Do not select a server automatically. Treat the
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add nanocoai/nanoclaw/add-mattermost@sha256:3c380236d9927460

The line at the top of this page pins the label git:20261022.8a91aad, 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_jxuois5xkphc2gna.svg)](https://markdownregistry.com/a/art_jxuois5xkphc2gna)

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

Versions

The registry has recorded 11 versions of this file, between Aug 26, 2026 and Oct 22, 2026, about one every 6 days.

versioncommittedcommitsizeaudit
git:20261022.8a91aad latest2026-10-22 8a91aad 17,180 BB view · diff
git:20261009.b889e542026-10-09 b889e54 16,438 BB view · diff
git:20260915.4781b4a2026-09-15 4781b4a 16,414 BB view · diff
git:20260915.0d0fcde2026-09-15 0d0fcde 15,156 BB view · diff
git:20260915.2f9a4e42026-09-15 2f9a4e4 15,267 BB view · diff
git:20260915.0dda37a2026-09-15 0dda37a 17,656 BB view · diff
git:20260826.4fa359a2026-08-26 4fa359a 17,735 BB view · diff
git:20260826.abe03192026-08-26 abe0319 17,701 BB view · diff
git:20260826.9065d532026-08-26 9065d53 17,396 BB view · diff
git:20260826.a4be90d2026-08-26 a4be90d 17,653 BB view · diff
git:20260826.bf23e392026-08-26 bf23e39 17,921 BB view

Audit of the latest version

B  16 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • fail: No link to a raw IP address (matched: http://127.0.0.1:8065)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (17180 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 script tag

Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.

Source

GitHub

nanocoai/nanoclaw · 31,085 stars · license MIT · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_jxuois5xkphc2gna
GET https://markdownregistry.com/api/v1/resolve?ref=nanocoai/nanoclaw/add-mattermost
GET https://markdownregistry.com/api/v1/blob/3c380236d992746018411d95f0726ddfd10ae2cb8bdd6f7ee997a13d19deadaa

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: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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