A command-line connection to Slack, a team messaging service. It can send and read messages, search conversations, find messages without replies, list channels, and add emoji reactions.

Use it to post in channels or threads, inspect recent messages, search for a term, find unreplied messages, list channels, or react to a message.

It reduces the need to move between the coding environment and team chat when checking or responding to work discussions.

slack-tool — Skill for Claude Code and Codex by xuiltul: A command-line connection to Slack, a team messaging service.

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/xuiltul/animaworks/slack-tool

Any agent

npx skills add xuiltul/animaworks --skill slack-tool

Clone the repo

git clone --depth 1 https://github.com/xuiltul/animaworks

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/xuiltul/animaworks/slack-tool.svg)](https://agentmods.dev/skills/xuiltul/animaworks/slack-tool)

Your own site

<a href="https://agentmods.dev/skills/xuiltul/animaworks/slack-tool"><img src="https://agentmods.dev/badge/skills/xuiltul/animaworks/slack-tool.svg" alt="Measured on agentmods" height="20"></a>

Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 613 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. 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.

Model	Per session	Once invoked
Fable 5	$0.00049	$0.00613
Opus 5	$0.00024	$0.00307
Sonnet 5	$0.00010	$0.00123
Haiku 4.5	$0.00005	$0.00061

Measured 4d ago against content hash 1c44fd7ba78f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

slack-tool 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 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.

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.

templates/en/common_skills/slack-tool/SKILL.md · 76 lines

What it actually says

Slack Tool

External tool for Slack messaging, search, reactions, and channel management.

Invocation via Bash

Use Bash with animaworks-tool slack <subcommand> [args]:

animaworks-tool slack send CHANNEL MESSAGE [--thread TS]
animaworks-tool slack messages CHANNEL [-n 20]
animaworks-tool slack search KEYWORD [-c CHANNEL] [-n 50]
animaworks-tool slack unreplied [--json]
animaworks-tool slack channels

Actions

send — Send message

{"tool_name": "slack", "action": "send", "args": {"channel": "#channel-name", "message": "text", "thread": "thread ts (optional)"}}

messages — Get messages

{"tool_name": "slack", "action": "messages", "args": {"channel": "#channel-name", "limit": 20}}

search — Search messages

{"tool_name": "slack", "action": "search", "args": {"keyword": "search term", "channel": "#channel (optional)", "limit": 50}}

unreplied — Check unreplied messages

{"tool_name": "slack", "action": "unreplied", "args": {}}

channels — List channels

{"tool_name": "slack", "action": "channels", "args": {}}

react — Add emoji reaction

{"tool_name": "slack", "action": "react", "args": {"channel": "#channel-name", "emoji": "thumbsup", "message_ts": "message timestamp"}}

emoji: Slack emoji name without colons (e.g. thumbsup, eyes, white_check_mark)
message_ts: Timestamp of the target message (available from messages action results)

CLI Usage (S/C/D/G-mode)

animaworks-tool slack send CHANNEL MESSAGE [--thread TS]
animaworks-tool slack messages CHANNEL [-n 20]
animaworks-tool slack search KEYWORD [-c CHANNEL] [-n 50]
animaworks-tool slack unreplied [--json]
animaworks-tool slack channels

The react action is not available via CLI. Use MCP instead.

Notes

Slack Bot Token must be configured in credentials
Channel can be specified with # prefix or by channel ID
Reactions require the reactions:write scope

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.

4d ago First seen · 76 lines · 49 tokens per session scan A 1c44fd7ba78f

Subscribe to this mod's changes

slack-tool is a skill published in the GitHub repository xuiltul/animaworks (254 stars, last pushed yesterday), licensed Apache-2.0. It adds 49 tokens to every session and 613 once invoked, about $0.0002 per session on Opus 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 2026-08-30.

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