add-slack

add-slack is a skill for Claude Code, Codex from BreadchainCoop/labor.fun. It costs 42 tokens per session (2,640 once invoked), scanned A, original, MIT.

A setup guide for adding Slack, a team messaging platform, as an assistant communication channel. It supports Slack’s Socket Mode and can also use its Events API through an HTTP receiver.

In plain words
What is it for?
Use it to add Slack channel code, configure Slack app tokens, install the required package, update environment settings, and run the included tests.
Why use it?
It provides the code changes and setup steps needed to connect an assistant to Slack, either alongside or instead of WhatsApp.

Skill for Claude CodeCodex

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/breadchaincoop/labor.fun/add-slack
Any agent
npx skills add BreadchainCoop/labor.fun --skill add-slack
Clone the repo
git clone --depth 1 https://github.com/BreadchainCoop/labor.fun

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 add-slack

README.md
[![agentmods](https://agentmods.dev/badge/skills/breadchaincoop/labor.fun/add-slack.svg)](https://agentmods.dev/skills/breadchaincoop/labor.fun/add-slack)
Your own site
<a href="https://agentmods.dev/skills/breadchaincoop/labor.fun/add-slack"><img src="https://agentmods.dev/badge/skills/breadchaincoop/labor.fun/add-slack.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,640 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00042 $0.02640
Opus 5 $0.00021 $0.01320
Sonnet 5 $0.00008 $0.00528
Haiku 4.5 $0.00004 $0.00264

Measured 4d ago against content hash 742cdf3ec7f4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

add-slack scanned grade A with 1 finding 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 4d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- Via API: `curl -s -H "Authorization: Bearer $SLACK_BOT_TOKEN" "https://slack.com/api/conversations.list" | jq '.channels[] | {id, name}'`
.claude/skills/add-slack/SKILL.md · 255 lines

How it starts

The opening of the file, as written. The whole thing — 255 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Slack Channel

This skill adds Slack support to your assistant, then walks through interactive setup.

Phase 1: Pre-flight

Check if already applied

Check if src/channels/slack.ts exists. If it does, skip to Phase 3 (Setup). The code changes are already in place.

Ask the user

Do they already have a Slack app configured? If yes, collect the Bot Token and App Token now. If no, we'll create one in Phase 3.

Phase 2: Apply Code Changes

Ensure channel remote

git remote -v

If slack is missing, add it:

git remote add slack https://github.com/qwibitai/salem-slack.git

Merge the skill branch

git fetch slack main
git merge slack/main || {
  git checkout --theirs package-lock.json
  git add package-lock.json
  git merge --continue
}

This merges in:

  • src/channels/slack.ts (SlackChannel class with self-registration via registerChannel)
  • src/channels/slack.test.ts (46 unit tests)
  • import './slack.js' appended to the channel barrel file src/channels/index.ts
  • @slack/bolt npm dependency in package.json
  • SLACK_BOT_TOKEN and SLACK_APP_TOKEN in .env.example

If the merge reports conflicts, resolve them by reading the conflicted files and understanding the intent of both sides.

Validate code changes

npm install
npm run build
npx vitest run src/channels/slack.test.ts

All tests must pass (including the new Slack tests) and build must be clean before proceeding.

Phase 3: Setup

Create Slack App (if needed)

If the user doesn't have a Slack app, share SLACK_SETUP.md which has step-by-step instructions with screenshots guidance, troubleshooting, and a token reference table.

Quick summary of what's needed:

  1. Create a Slack app at api.slack.com/apps
  2. Enable Socket Mode and generate an App-Level Token (xapp-...)
  3. Subscribe to bot events: message.channels, message.groups, message.im
  4. Add OAuth scopes: chat:write, channels:history, groups:history, im:history, channels:read, groups:read, users:read
  5. Install to workspace and copy the Bot Token (xoxb-...)

Read the full file on GitHub · 255 lines

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. 4d ago First seen · 255 lines · 42 tokens per session scan A 742cdf3ec7f4

Subscribe to this mod's changes

add-slack is a skill published in the GitHub repository BreadchainCoop/labor.fun (2 stars, last pushed 3d ago), licensed MIT. It adds 42 tokens to every session and 2,640 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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