slack-cli

slack-cli is a skill for Claude Code from ulises-jeremias/agent-toolkit. It costs 45 tokens per session (758 once invoked), scanned A, original, MIT.

A command-line tool for building and managing Slack apps, which are programs that run on Slack. It supports app setup, local runs, deployment, configuration, and diagnostics.

In plain words
What is it for?
Use it to create or initialize Slack apps, manage environments and triggers, deploy them, and run diagnostics.
Why use it?
It separates Slack app development from tools that only automate messages in an existing workspace.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the agent-toolkit-complete plugin — 106 skills shipped together

Good fit Use it to create or initialize Slack apps, manage environments and triggers, deploy them, and run diagnostics.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ulises-jeremias/agent-toolkit/slack-cli
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 ulises-jeremias/agent-toolkit --skill slack-cli
Clone the repo
git clone --depth 1 https://github.com/ulises-jeremias/agent-toolkit

Made for: Claude Code.

Or install agent-toolkit-complete, the plugin that ships this one along with the rest of its 106 skills.

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-cli

README.md
[![agentmods](https://agentmods.dev/badge/skills/ulises-jeremias/agent-toolkit/slack-cli/github.svg)](https://agentmods.dev/skills/ulises-jeremias/agent-toolkit/slack-cli)
Your own site
<a href="https://agentmods.dev/skills/ulises-jeremias/agent-toolkit/slack-cli"><img src="https://agentmods.dev/badge/skills/ulises-jeremias/agent-toolkit/slack-cli/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-cli

Your own site · 80×15
<a href="https://agentmods.dev/skills/ulises-jeremias/agent-toolkit/slack-cli"><img src="https://agentmods.dev/badge/skills/ulises-jeremias/agent-toolkit/slack-cli.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 758 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 pass 7 Sept 2026
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 $0.00045 $0.00758
Opus 5.5 $0.00018 $0.00303
Sonnet 5.5 $0.00009 $0.00152
Haiku 4.5 $0.00005 $0.00076

Measured 1mo ago against content hash 1230496dec64, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

slack-cli 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 1mo 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.

compatibility: Requires official Slack CLI from docs.slack.dev (not rockymadden/slack-cli), plus curl
plugins/agent-toolkit-complete/.github/skills/slack-cli/SKILL.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Slack CLI (Official Slack Developer CLI)

Use the official Slack Developer CLI documented at docs.slack.dev/tools/slack-cli/.

This CLI is for Slack app development and platform management. It is not the community chat automation CLI (slack chat send, etc.).

When to Use

  • Create or initialize a Slack app project
  • Log in/out and manage authorized teams for app development
  • Run and deploy Slack apps
  • Manage manifests, env vars, functions, and triggers
  • Run diagnostics with slack doctor

Setup

If slack is not found, or slack --help does not mention app development, see references/INSTALLATION.md.

Some machines already have another slack binary (e.g., Slack desktop). In that case, the official CLI can be installed as slack-dev.

Use this detection pattern first:

if slack --help 2>/dev/null | grep -q "create, run, and deploy Slack apps"; then
  SLACK_CMD=slack
elif slack-dev --help 2>/dev/null | grep -q "create, run, and deploy Slack apps"; then
  SLACK_CMD=slack-dev
else
  echo "Official Slack CLI not found"
fi

Authorize after install:

"$SLACK_CMD" login
"$SLACK_CMD" list

Core Commands

"$SLACK_CMD" version
"$SLACK_CMD" doctor
"$SLACK_CMD" login
"$SLACK_CMD" logout
"$SLACK_CMD" list

Project Lifecycle

# Create a new project
"$SLACK_CMD" create

# Initialize an existing project directory
"$SLACK_CMD" init

# Run app locally
"$SLACK_CMD" run

# Deploy app
"$SLACK_CMD" deploy

App and Platform Management

"$SLACK_CMD" manifest info
"$SLACK_CMD" manifest validate
"$SLACK_CMD" env list
"$SLACK_CMD" env add
"$SLACK_CMD" trigger list
"$SLACK_CMD" trigger create
"$SLACK_CMD" trigger access list
"$SLACK_CMD" activity
"$SLACK_CMD" app list
"$SLACK_CMD" app install
"$SLACK_CMD" app uninstall
  1. "$SLACK_CMD" login
  2. "$SLACK_CMD" create or "$SLACK_CMD" init
  3. "$SLACK_CMD" doctor
  4. "$SLACK_CMD" run
  5. "$SLACK_CMD" deploy
  6. "$SLACK_CMD" trigger list and validate trigger behavior

Read the full file on GitHub · 110 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 110 lines · 45 tokens per session scan A 1230496dec64

Subscribe to this mod's changes

slack-cli is a skill published in the GitHub repository ulises-jeremias/agent-toolkit (19 stars, last pushed 2d ago), licensed MIT. It adds 45 tokens to every session and 758 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-04.

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