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mcp-slack: Instructions file for Claude Code

CLAUDE.md

mcp-slack CLAUDE.md is an instructions file for Claude Code from crunchtools/mcp-slack. It costs 1,332 tokens per session, scanned A, original, AGPL-3.0.

Instructions for running an MCP server that connects AI agents to Slack, including setup options using uvx, a container, or local development.

In plain words
What is it for?
Use them when setting up, running, or developing the Slack MCP server.
Why use it?
They explain the available ways to start and develop the Slack connection.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is crunchtools/mcp-slack's own configuration. It tells Claude Code how to work on mcp-slack itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-slack configures →

not rated 2repo changed 27d ago A scan 1,332 tokens AGPL-3.0
View source ↗ crunchtools/mcp-slack
Reuse

Borrowing it

Nothing to install: this file belongs to crunchtools/mcp-slack. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/crunchtools/mcp-slack/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/crunchtools/mcp-slack

Made for: Claude Code.

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 mcp-slack CLAUDE.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/crunchtools/mcp-slack/claude-md"><img src="https://agentmods.dev/badge/instructions/crunchtools/mcp-slack/claude-md/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/crunchtools/mcp-slack/claude-md"><img src="https://agentmods.dev/badge/instructions/crunchtools/mcp-slack/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,332 This file is loaded in full into every session.
When invoked 1,332 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.01332 $0.01332
Opus 5.5 $0.00533 $0.00533
Sonnet 5.5 $0.00266 $0.00266
Haiku 4.5 $0.00133 $0.00133

Measured 27d ago against content hash 008c8edbaa86, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-slack CLAUDE.md 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 27d 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.

CLAUDE.md · 164 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 27d ago Changed · +4 lines · +115 tokens per session 008c8edbaa86
  2. 2mo ago First seen · 160 lines · 1,217 tokens per session scan A 1f06b8ed8798

Subscribe to this mod's changes

mcp-slack CLAUDE.md is an instructions file published in the GitHub repository crunchtools/mcp-slack (2 stars, last pushed today), licensed AGPL-3.0. It adds 1,332 tokens to every session, about $0.0053 per session on Opus 5.5. 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 2026-08-31.

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