post-slack-message SKILL.md skillA
post-slack-message from tomzx/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tomzx/agents/post-slack-message@git:20261007.b35fc4bPins git:20261007.b35fc4b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tomzx/agents
- Path
skills/post-slack-message/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261007.b35fc4b, committed Oct 7, 2026
- First version recorded
- Sep 18, 2026
- Size
- 7,397 bytes
- Repository stars
- 12
- License
- MIT
Post a message to a Slack channel or as a thread reply. By default writes the message to a temp file and asks the user to confirm before sending; pass --yes to send immediately without prompting. Use when the user says /post-slack-message, "post to Slack", "send a Slack message", "reply in a Slack thread", or another skill delegates its Slack posting here.
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
# Post Slack Message Posts a message to a Slack channel or as a thread reply using `post_slack_message.py` (Slack Web API `chat.postMessage`). This skill contains the compose-and-confirm flow so it can use the question tool; the script is the send primitive. ## Behavior modes - **Review mode (default):** write the message to a temp file, then use the **question** tool to ask the user to confirm sending the content of that file. Nothing is posted until the user approves. - **Immediate mode (`--yes`):** skip the confirmation and post right away. Use this for fully unattended flows (scheduled jobs, automation, or a caller that has already shown the message to the user). `--yes` (also `-y`, `--send`, `--auto`) is accepted in any position of the arguments. ## Prerequisites - `SLACK_TOKEN` set. A bot token (`xoxb-`) only needs the token; a web/browser token (`xoxc-`) also needs `SLACK_COOKIE` (the `xoxd-` value), the same credentials used by `slack-kb-individual` and `slackx`. Place them in `.env` at the repo root or export them in the environment. - The target channel: a channel id, a Slack archive URL, or a channel name. …
Read the whole file at its exact version.
How to install
mdr add tomzx/agents/post-slack-message@sha256:71b8561736a3b8a5The line at the top of this page pins the label git:20261007.b35fc4b, 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_465ky23mzjrrhwyb)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 18, 2026 and Oct 7, 2026, about one every 5 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261007.b35fc4b latest | 2026-10-07 | b35fc4b | 7,397 B | A | view · diff |
| git:20261004.00bb0c5 | 2026-10-04 | 00bb0c5 | 7,375 B | A | view · diff |
| git:20260930.e2e20d7 | 2026-09-30 | e2e20d7 | 7,394 B | A | view · diff |
| git:20260929.30f58fc | 2026-09-29 | 30f58fc | 7,276 B | A | view · diff |
| git:20260918.8bd9ed8 | 2026-09-18 | 8bd9ed8 | 7,276 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7397 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
tomzx/agents · 12 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_465ky23mzjrrhwyb GET https://markdownregistry.com/api/v1/resolve?ref=tomzx/agents/post-slack-message GET https://markdownregistry.com/api/v1/blob/71b8561736a3b8a56ef2f8420aa313e709466b97cb8539f542b07718c52bb107
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.