slack

slack is a skill for Claude Code, Codex from XAIHT/Tlamatini. It costs 17 tokens per session (459 once invoked), scanned A, original, MIT.

A guide for working with Slack’s web interface, including sending messages, reading channel history, and managing threads.

In plain words
What is it for?
Use it to post messages, reply in threads, read conversations, add reactions, and upload files.
Why use it?
It maps common communication tasks to the appropriate Slack API requests and required authentication.

Skill for Claude CodeCodex

Which agent this was written for is unclear — built for openclaw. Also seen: built for openclaw.

Install

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.

agentmods
npx agentmods add skills/xaiht/tlamatini/slack
Any agent
npx skills add XAIHT/Tlamatini --skill slack
Clone the repo
git clone --depth 1 https://github.com/XAIHT/Tlamatini

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for slack

README.md
[![agentmods](https://agentmods.dev/badge/skills/xaiht/tlamatini/slack.svg)](https://agentmods.dev/skills/xaiht/tlamatini/slack)
Your own site
<a href="https://agentmods.dev/skills/xaiht/tlamatini/slack"><img src="https://agentmods.dev/badge/skills/xaiht/tlamatini/slack.svg" alt="Measured on agentmods" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 459 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00017 $0.00459
Opus 5 $0.00009 $0.00230
Sonnet 5 $0.00003 $0.00092
Haiku 4.5 $0.00002 $0.00046

Measured 6d ago against content hash 5ca3bdb4f1d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

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 6d 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.

Tlamatini/agent/skills_pkg/slack/SKILL.md · 56 lines

What it actually says

Slack skill

Use the Slack Web API. SLACK_BOT_TOKEN must be in env.

Endpoints

  • postchat.postMessage
  • replychat.postMessage with thread_ts
  • read-historyconversations.history
  • reactreactions.add
  • uploadfiles.upload (or files.uploadV2 for >5MB)

Endpoints are at https://slack.com/api/<method>. Token goes in Authorization: Bearer .... Body is application/json for most modern methods.

Changes

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.

  1. 6d ago First seen · 56 lines · 17 tokens per session scan A 5ca3bdb4f1d2

Subscribe to this mod's changes

slack is a skill published in the GitHub repository XAIHT/Tlamatini (16 stars, last pushed today), licensed MIT. It adds 17 tokens to every session and 459 once invoked, about $0.0001 per session on Opus 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.