Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add tallclub/matimo --skill slackgit clone --depth 1 https://github.com/tallclub/matimoWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/tallclub/matimo/slack)<a href="https://agentmods.dev/skills/tallclub/matimo/slack"><img src="https://agentmods.dev/badge/skills/tallclub/matimo/slack/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/tallclub/matimo/slack"><img src="https://agentmods.dev/badge/skills/tallclub/matimo/slack.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00025 | $0.01938 |
| Opus 5.5 | $0.00010 | $0.00775 |
| Sonnet 5.5 | $0.00005 | $0.00388 |
| Haiku 4.5 | $0.00003 | $0.00194 |
Grade A, and why
slack scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Slack
Complete guide to using Matimo's Slack tools for messaging, channels, users, search, and file sharing.
All Available Tools
| Tool | Purpose | Category |
|---|---|---|
slack_send_channel_message |
Post a message to a channel | Messaging |
slack_reply_to_message |
Reply in a thread | Messaging |
slack_add_reaction |
Add an emoji reaction | Messaging |
slack_get_reactions |
Get reactions on a message | Messaging |
slack_get_channel_history |
Read recent messages from a channel | Messaging |
slack_get_thread_replies |
Get all replies in a thread | Messaging |
slack_send_dm |
Send a direct message to a user | Users |
slack_search_messages |
Search across all channels | Search |
slack_get_user_info |
Look up a user's profile | Users |
slack-get-user |
Get basic user details | Users |
slack_upload_file |
Upload a file to a channel or DM | Files |
slack-list-channels |
List available channels | Channels |
slack-send-message |
Send a message (simplified) | Messaging |
slack_create_channel |
Create a new channel | Channels |
slack_set_channel_topic |
Set or update the channel topic | Channels |
slack_join_channel |
Join an existing channel | Channels |
Authentication
All Slack tools require a SLACK_BOT_TOKEN environment variable. The bot must have the relevant OAuth scopes (chat:write, channels:read, channels:history, users:read, search:read, files:write).
Channel Messaging
Sending a Message
Use slack_send_channel_message to post to any public or private channel the bot is a member of.
| Parameter | Type | Required | Description |
|---|---|---|---|
channel |
string | Yes | Channel ID (C01ABCDEF) or name (#general) |
text |
string | No | Plain-text message body |
blocks |
array | No | Block Kit UI layout for rich formatting |
Best practices:
- Always provide
texteven withblocks— it's the notification preview and screen reader fallback - Use channel IDs over names for reliability (names can change)
- Keep messages under 4000 characters; split longer content
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 221 lines · 25 tokens per session scan A 7a64aa76b528
slack is a skill published in the GitHub repository tallclub/matimo (18 stars, last pushed yesterday), licensed MIT. It adds 25 tokens to every session and 1,938 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
slack compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| slacktallclub/matimo | Skill | 18 | yesterday | MIT | A | 25 | Claude Code, Codex |
| orbit-notionnexu-io/open-design | Skill | 106k | yesterday | Apache-2.0 | A | 117 | Claude Code, Codex |
| agentmailpaperclipai/paperclip | Skill | 111k | yesterday | MIT | A | 30 | Claude Code, Codex |
| Cortexdanielmiessler/LifeOS | Skill | 20k | yesterday | MIT | A | 184 | Claude Code |
| rowboat-spacesrowboatlabs/rowboat | Skill | 18k | yesterday | Apache-2.0 | A | 60 | Claude Code, Codex |
| feishuHmbown/CodeWhale | Skill | 41k | 5d ago | MIT | A | 33 | Claude Code, Codex |
| pinchtab-mcppinchtab/pinchtab | Skill | 11k | 10d ago | MIT | A | 52 | Claude Code, Codex |