slack

slack is a skill for Claude Code, Codex from ykdojo/antigravity-cloud-run. It costs 23 tokens per session (217 once invoked), scanned A, a copy of slack, MIT.

A read-only connection to Slack, a workplace messaging service, for viewing conversations and workspace information. It can access channels, direct messages, users, and message searches.

In plain words
What is it for?
Listing channels and direct messages, reading recent channel history, searching messages, viewing users, and checking channel details.
Why use it?
It removes the need to switch between the coding agent and Slack when looking for project discussions or decisions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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/ykdojo/antigravity-cloud-run/slack
Any agent
npx skills add ykdojo/antigravity-cloud-run --skill slack
Clone the repo
git clone --depth 1 https://github.com/ykdojo/antigravity-cloud-run

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/ykdojo/antigravity-cloud-run/slack.svg)](https://agentmods.dev/skills/ykdojo/antigravity-cloud-run/slack)
Your own site
<a href="https://agentmods.dev/skills/ykdojo/antigravity-cloud-run/slack"><img src="https://agentmods.dev/badge/skills/ykdojo/antigravity-cloud-run/slack.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 217 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00023 $0.00217
Opus 5 $0.00012 $0.00109
Sonnet 5 $0.00005 $0.00043
Haiku 4.5 $0.00002 $0.00022

Measured 6d ago against content hash e7c9dccfa0af, 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.

Origin

This is a copy

100% identical to slack — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

setup/skills/slack/SKILL.md · 34 lines

What it actually says

Slack Read Tool

Use ~/tools/slack-read.js to read Slack data:

# List channels
node ~/tools/slack-read.js channels

# List DMs
node ~/tools/slack-read.js dms

# Read channel history (last 20 messages)
node ~/tools/slack-read.js history <channel_id>
node ~/tools/slack-read.js history <channel_id> 50  # last 50

# Search messages
node ~/tools/slack-read.js search "keyword"
node ~/tools/slack-read.js search "from:@user in:#channel"

# List users
node ~/tools/slack-read.js users

# Get channel info
node ~/tools/slack-read.js info <channel_id>
  • This is read-only - you cannot send messages or modify anything
  • Requires SLACK_TOKEN env var (run ./scripts/setup-slack.sh on host)
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 · 34 lines · 23 tokens per session scan A e7c9dccfa0af

Subscribe to this mod's changes

slack is a skill published in the GitHub repository ykdojo/antigravity-cloud-run (2 stars, last pushed 1mo ago), licensed MIT. It adds 23 tokens to every session and 217 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to slack, differing in 0 lines, and is treated as a copy.