@cli4ai/slack

Official @cli4ai package • https://cli4ai.com • Install cli4ai: npm i -g cli4ai

Full-featured Slack CLI. Uses channel/user names instead of IDs.

Setup

npm i -g cli4ai
cli4ai add -g slack
cli4ai secrets init slack

SLACK_BOT_TOKEN is required (xoxb-...). Create a Slack app, install it to your workspace, and grant the scopes listed below.

Commands

Channels

cli4ai run slack channels [limit]              # List channels (alias: ls)
cli4ai run slack info "#channel"               # Get channel info
cli4ai run slack unread                        # Channels with unread messages

Messages

cli4ai run slack history "#channel" [limit]    # Get messages (alias: read)
cli4ai run slack thread "#channel" <ts> [limit] # Get thread replies
cli4ai run slack post "#channel" "message"     # Post message (alias: msg, send)
cli4ai run slack postas "#ch" "msg" "Name" "icon"  # Post as custom user
cli4ai run slack reply "#ch" <ts> "msg"        # Reply to thread (use --broadcast)
cli4ai run slack edit "#channel" <ts> "text"   # Edit a message
cli4ai run slack delete "#channel" <ts>        # Delete a message

Reactions

cli4ai run slack react "#channel" <ts> emoji   # Add reaction
cli4ai run slack reactions "#channel" <ts>     # See who reacted to a message

Pins

cli4ai run slack pins "#channel"               # List pinned messages
cli4ai run slack pin "#channel" <ts>           # Pin a message
cli4ai run slack unpin "#channel" <ts>         # Unpin a message

Users

cli4ai run slack users [limit]                 # List users
cli4ai run slack user "@username"              # Get user info
cli4ai run slack dm "@username" "message"      # Send direct message
cli4ai run slack status [emoji] [text]         # Get/set status (use "clear" to clear)

Files

cli4ai run slack upload "#channel" ./file.pdf "comment"

Scheduling

cli4ai run slack schedule "#ch" "2025-12-14T09:00" "msg"  # Schedule message
cli4ai run slack scheduled [channel]                      # List scheduled
cli4ai run slack unschedule "#channel" <id>               # Delete scheduled

Monitoring

cli4ai run slack watch "#channel"              # Live watch for new messages
cli4ai run slack mentions                      # Find recent mentions of you

Output Flags

--raw, -r        # Full JSON output
--compact, -c    # One line per message
--broadcast, -b  # Broadcast thread reply to channel
--limit=N        # Override default limit
--interval=N     # Watch poll interval (seconds)

Name Resolution

Use #channel-name instead of channel IDs:

cli4ai run slack post "#claude" "Hello!"       # Instead of C093DN981RR

Use @username instead of user IDs:

cli4ai run slack dm "@adam" "Hey!"             # Instead of U02JCQC0SLB
cli4ai run slack user "@mail"                  # Lookup by name or email

Custom Bot Identity

Post messages with a custom username and avatar:

# Using emoji as icon
cli4ai run slack postas "#claude" "Breaking news!" "News Bot" "newspaper"

# Using URL as icon
cli4ai run slack postas "#claude" "Hello!" "Custom Bot" "https://example.com/avatar.png"

Slack mrkdwn Formatting

*bold*              _italic_           ~strikethrough~
`code`              ```code block```   > blockquote
<https://url|text>  <@U123>           :emoji:

Use \n for newlines:

cli4ai run slack post "#claude" "Line 1\nLine 2\n• Bullet"

Examples

# Read recent messages (compact view)
cli4ai run slack history "#claude" 10 --compact

# Post with formatting
cli4ai run slack post "#claude" "*Important*: Check <https://example.com|this link>"

# Post as a custom bot
cli4ai run slack postas "#claude" ":rotating_light: Alert!" "Alert Bot" "warning"

# Reply and broadcast to channel
cli4ai run slack reply "#claude" 1234567890.123 "On it!" --broadcast

# See who reacted to a message
cli4ai run slack reactions "#claude" 1234567890.123

# Pin an important message
cli4ai run slack pin "#claude" 1234567890.123

# Schedule a message
cli4ai run slack schedule "#general" "2025-12-25T09:00:00" ":christmas_tree: Merry Christmas!"

# Watch for new messages
cli4ai run slack watch "#claude"

# Upload a file
cli4ai run slack upload "#claude" ./report.pdf "Here's the report"

Project Structure

slack/
├── run.ts           # CLI entry point
└── lib/
    ├── api.ts       # Core API + name resolution
    ├── channels.ts  # Channel operations
    ├── messages.ts  # Messages, reactions, postAs
    ├── users.ts     # User operations
    ├── files.ts     # File uploads
    ├── pins.ts      # Pin operations
    ├── schedule.ts  # Scheduled messages
    └── watch.ts     # Watch + mentions

Required Bot Scopes

The bot needs these OAuth scopes:

• channels:history, channels:read, channels:join, channels:manage
• groups:history, groups:read
• chat:write, chat:write.customize
• reactions:read, reactions:write
• pins:read, pins:write
• files:read, files:write
• users:read, users:read.email, users.profile:read
• im:history, im:read, im:write
• app_mentions:read
• bookmarks:read, bookmarks:write