A command-line interface for Slack, a team messaging service. It can read and search messages, check unread items, set a status or do-not-disturb mode, and browse activity.

Use it to inspect channels and direct messages, search conversations, manage unread messages, and update Slack availability settings.

It lets you handle common Slack tasks from the terminal instead of switching to the Slack app.

slack — Skill for Claude Code by ericboehs/claude-plugins

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 ericboehs/claude-plugins --skill slack

Clone the repo

git clone --depth 1 https://github.com/ericboehs/claude-plugins

Made for: Claude Code.

Or install slack, the plugin that ships this one along with the rest of its 1 skill.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ericboehs/claude-plugins/slack/github.svg)](https://agentmods.dev/skills/ericboehs/claude-plugins/slack)

Your own site

<a href="https://agentmods.dev/skills/ericboehs/claude-plugins/slack"><img src="https://agentmods.dev/badge/skills/ericboehs/claude-plugins/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/ericboehs/claude-plugins/slack"><img src="https://agentmods.dev/badge/skills/ericboehs/claude-plugins/slack.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,333 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00048	$0.01333
Opus 5.5	$0.00019	$0.00533
Sonnet 5.5	$0.00010	$0.00267
Haiku 4.5	$0.00005	$0.00133

Measured 2mo ago against content hash fcfabe797f4a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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.

plugins/slack/skills/slack/SKILL.md · 221 lines

How it starts

The opening of the file, as written. The whole thing — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Slack (slk CLI)

Interact with Slack from the command line using slk (Slack Gem).

Prerequisites

slk must be installed and authenticated. If any command fails with "command not found", suggest running /setup-slack.

Usage

/slack — Show unread messages across all workspaces
/slack unread — Same as above
/slack messages #channel — Read recent channel messages
/slack search "query" — Search messages

Arguments after /slack map directly to slk subcommands.

Commands

Unread messages

# Show unread across all workspaces (default action)
slk unread

# Unread for a specific workspace
slk unread -w oddball

# Include muted channels
slk unread --muted

# Clear all unread
slk unread clear

# Clear unread for a specific channel
slk unread clear #channel

Read channel/DM messages

# Channel messages
slk messages #general
slk messages #eert-teammates-internal

# DM messages
slk messages @alexteal

# From a Slack URL (message + thread context)
slk messages https://oddball-io.slack.com/archives/C123/p456

# Limit number of messages
slk messages #general -n 20

# Messages since a duration or date
slk messages #general --since 1d
slk messages #general --since 7d
slk messages #general --since 2026-02-28

# Include thread replies inline
slk messages #general --threads

# Specific workspace
slk messages #general -w oddball

Read threads

Use the messages command with a Slack message URL — it returns the message and its thread:

slk messages https://oddball-io.slack.com/archives/C123ABC/p1234567890

Search messages

Requires user token (xoxc/xoxs), not bot tokens.

# Basic search
slk search "deploy"

# Filter by channel
slk search "deploy" --in #platform-sre-team

# Filter by user
slk search "vtk" --from @alexteal

# Filter by date
slk search "outage" --after 2026-02-01 --before 2026-03-01
slk search "standup" --on 2026-02-28

# Combine filters
slk search "PR review" --in #eert-teammates-internal --from @tomwarren

# More results
slk search "deploy" -n 50

# Specific workspace
slk search "deploy" -w oddball

Read the full file on GitHub · 221 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.

2mo ago First seen · 221 lines · 48 tokens per session scan A fcfabe797f4a

Subscribe to this mod's changes

slack is a skill published in the GitHub repository ericboehs/claude-plugins (2 stars, last pushed 2mo ago), licensed MIT. It adds 48 tokens to every session and 1,333 once invoked, about $0.0002 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.

Productivity

slack next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
slackericboehs/claude-plugins	Skill	2	2mo ago	MIT	A	48	Claude Code
orbit-notionnexu-io/open-design	Skill	106k	today	Apache-2.0	A	117	Claude Code, Codex
agentmailpaperclipai/paperclip	Skill	112k	today	MIT	A	30	Claude Code, Codex
Cortexdanielmiessler/LifeOS	Skill	20k	2d ago	MIT	A	184	Claude Code
rowboat-spacesrowboatlabs/rowboat	Skill	18k	today	Apache-2.0	A	60	Claude Code, Codex
feishuHmbown/CodeWhale	Skill	41k	6d ago	MIT	A	33	Claude Code, Codex
pinchtab-mcppinchtab/pinchtab	Skill	11k	11d ago	MIT	A	52	Claude Code, Codex