add-slack

add-slack is a skill for Claude Code, Codex from sliamh11/Deus. It costs 29 tokens per session (1,709 once invoked), scanned A, original, MIT.

A planned integration for connecting an agent to Slack, a workplace messaging platform, using Socket Mode, which receives events without a public web address.

In plain words
What is it for?
The documented future setup covers Slack app creation, message events, permissions, tokens, and automatic enabling from credentials.
Why use it?
It will provide Slack support once its underlying package is released, but it is not currently available.

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/sliamh11/deus/add-slack
Any agent
npx skills add sliamh11/Deus --skill add-slack
Clone the repo
git clone --depth 1 https://github.com/sliamh11/Deus

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/sliamh11/deus/add-slack.svg)](https://agentmods.dev/skills/sliamh11/deus/add-slack)
Your own site
<a href="https://agentmods.dev/skills/sliamh11/deus/add-slack"><img src="https://agentmods.dev/badge/skills/sliamh11/deus/add-slack.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,709 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 5.1 $0.00029 $0.01709
Opus 5 $0.00015 $0.00855
Sonnet 5 $0.00006 $0.00342
Haiku 4.5 $0.00003 $0.00171

Measured 5d ago against content hash 118adb9ef102, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, 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 5d 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 · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Slack Channel

Status: Coming soon — this channel will be available as @deus-ai/slack-mcp. The MCP package is not yet available.

This skill will add Slack support to Deus once the MCP package is released. In the meantime, the setup/config/registration phases below describe what the integration will look like.

Phase 1: Setup (Future)

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-...)

Configure environment

Add to .env:

SLACK_BOT_TOKEN=xoxb-your-bot-token
SLACK_APP_TOKEN=xapp-your-app-token

Channels auto-enable when their credentials are present — no extra configuration needed.

Sync to container environment:

mkdir -p data/env && cp .env data/env/env

The container reads environment from data/env/env, not .env directly.

Phase 2: Registration (Future)

Get Channel ID

Tell the user:

  1. Add the bot to a Slack channel (right-click channel → View channel detailsIntegrationsAdd apps)
  2. In that channel, the channel ID is in the URL when you open it in a browser: https://app.slack.com/client/T.../C0123456789 — the C... part is the channel ID
  3. Alternatively, right-click the channel name → Copy link — the channel ID is the last path segment

The JID format for Deus is: slack:C0123456789

Register the channel

The channel ID, name, and folder name are needed. Use npx tsx setup/index.ts --step register with the appropriate flags.

Read the full file on GitHub · 150 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. 5d ago First seen · 150 lines · 29 tokens per session scan A 118adb9ef102

Subscribe to this mod's changes

add-slack is a skill published in the GitHub repository sliamh11/Deus (51 stars, last pushed 2d ago), licensed MIT. It adds 29 tokens to every session and 1,709 once invoked, about $0.0001 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 2026-08-30.