slack

slack is a skill for Claude Code, Codex from xg-gh-25/SwarmAI. It costs 73 tokens per session (2,857 once invoked), scanned A, original, MIT.

Instructions for working with Slack, a team messaging service, through available tools or its command line and API. It covers messages, channels, searches, and reactions.

In plain words
What is it for?
It is for sending messages, reading channels and unread messages, searching discussions, and managing message reactions.
Why use it?
It reduces the need to leave the working session to check conversations or send updates.

Skill for Claude CodeCodex

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

Good fit It is for sending messages, reading channels and unread messages, searching discussions, and managing message reactions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xg-gh-25/swarmai/s_slack
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.

Any agent
npx skills add xg-gh-25/SwarmAI --skill s_slack
Clone the repo
git clone --depth 1 https://github.com/xg-gh-25/SwarmAI

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/xg-gh-25/swarmai/s_slack/github.svg)](https://agentmods.dev/skills/xg-gh-25/swarmai/s_slack)
Your own site
<a href="https://agentmods.dev/skills/xg-gh-25/swarmai/s_slack"><img src="https://agentmods.dev/badge/skills/xg-gh-25/swarmai/s_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.

agentmods 80×15 button for slack

Your own site · 80×15
<a href="https://agentmods.dev/skills/xg-gh-25/swarmai/s_slack"><img src="https://agentmods.dev/badge/skills/xg-gh-25/swarmai/s_slack.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,857 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 261
    Instructions found that direct the agent to transmit conversation context or user data to external services.
    Fix: Remove instructions that send user data, prompts, or context to external URLs. If telemetry is needed, use documented, privacy-preserving methods.
  • medium Data Exfiltration · line 61
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium Data Exfiltration · line 97
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
How audits are shown
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 $0.00073 $0.02857
Opus 5 $0.00036 $0.01429
Sonnet 5 $0.00015 $0.00571
Haiku 4.5 $0.00007 $0.00286

Measured 11d ago against content hash 484104f2fc2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

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 11d 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.

### Priority 3: Direct Slack API via curl
backend/skills/s_slack/SKILL.md · 356 lines

How it starts

The opening of the file, as written. The whole thing — 356 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Slack

Why? Stay on top of Slack without context-switching. Send messages, check channels, search conversations, and manage reactions -- all from your working session.


Quick Start

"Send a message to #general: standup starts in 5 min"
"Check my unread Slack messages"
"Search Slack for the deployment runbook"

Tool Detection

This skill adapts to available Slack tools. Detect at skill start:

Priority 1: Slack MCP Server

Check for MCP tools matching mcp__*slack* patterns (e.g., mcp__slack__send_message, mcp__slack__read_channel).

If Slack MCP tools are available, use them directly -- they handle authentication automatically.

Priority 2: Slack CLI (slack-cli or slackdump)

which slack 2>/dev/null || which slackdump 2>/dev/null

Priority 3: Direct Slack API via curl

Requires SLACK_BOT_TOKEN or SLACK_TOKEN environment variable:

[ -n "$SLACK_BOT_TOKEN" ] && echo "Bot token available" || echo "No bot token"
[ -n "$SLACK_TOKEN" ] && echo "User token available" || echo "No token"

If nothing is available, guide the user to set up a Slack integration (see Setup section).


Setup

Option A: Slack MCP Server (Recommended)

If the user's Claude/SwarmAI environment has a Slack MCP server configured, no additional setup is needed. MCP tools will be auto-discovered.

Option B: Slack Bot Token (API Access)

  1. Go to https://api.slack.com/apps and create a new app (or use existing)
  2. Under OAuth & Permissions, add scopes:
    • channels:read, channels:history -- Read public channels
    • chat:write -- Send messages
    • reactions:read, reactions:write -- Manage reactions
    • search:read -- Search messages
    • users:read -- Look up user info
    • im:read, im:history -- Read DMs
    • groups:read, groups:history -- Read private channels (if needed)
  3. Install to workspace and copy the Bot User OAuth Token
  4. Set environment variable:
    export SLACK_BOT_TOKEN=xoxb-your-token-here
    

Read the full file on GitHub · 356 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. 11d ago First seen · 356 lines · 73 tokens per session scan A 484104f2fc2f

Subscribe to this mod's changes

slack is a skill published in the GitHub repository xg-gh-25/SwarmAI (44 stars, last pushed 4d ago), licensed MIT. It adds 73 tokens to every session and 2,857 once invoked, about $0.0004 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.

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