How do I install the Messaging skill?

Run npx skillmds@latest add tryshift-sh/messaging in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Messaging safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Messaging?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Messaging free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Messaging?

tryshift-sh (@tryshift-sh) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Messaging by tryshift-sh — Agent Skill

Name: Messaging
Author: tryshift-sh

File contents

Slack Messaging

Use this skill to interact with Slack channels and messages: list channels, read conversation history, send messages, reply in threads, and add or remove reactions.

When to use

list channels in a Slack workspace
read recent messages in a channel
read thread replies
send a message to a channel or DM
reply to a thread
add or remove emoji reactions

Authentication

This skill uses the connected slack provider credential for the current agent.

Invocation

All actions are called through Shift's Skill Router:

curl -X POST "$SHIFT_LOCAL_GATEWAY/skill-router/invoke" \
  -H "Content-Type: application/json" \
  -d '{
    "skillProvider": "slack",
    "skill": "messaging",
    "action": "list-channels",
    "input": {
      "limit": 20
    }
  }'

Examples

List channels:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "list-channels",
  "input": {
    "types": "public_channel,private_channel",
    "limit": 20
  }
}

Get channel info:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "get-channel",
  "input": {
    "channel": "C1234567890"
  }
}

List messages in a channel:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "list-messages",
  "input": {
    "channel": "C1234567890",
    "limit": 20
  }
}

Get thread replies:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "get-thread",
  "input": {
    "channel": "C1234567890",
    "ts": "1234567890.123456"
  }
}

Send a message:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "send",
  "input": {
    "channel": "C1234567890",
    "text": "Hello from Shift!"
  }
}

Reply in a thread:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "send",
  "input": {
    "channel": "C1234567890",
    "text": "This is a thread reply.",
    "threadTs": "1234567890.123456"
  }
}

Add a reaction:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "react",
  "input": {
    "channel": "C1234567890",
    "timestamp": "1234567890.123456",
    "name": "thumbsup"
  }
}

Remove a reaction:

{
  "skillProvider": "slack",
  "skill": "messaging",
  "action": "remove-react",
  "input": {
    "channel": "C1234567890",
    "timestamp": "1234567890.123456",
    "name": "thumbsup"
  }
}

If the connection is missing, tell the user to configure Slack in Shift.

---name: messagingdescription: List Slack channels, read messages, send messages, reply in threads, and manage reactions through Shift.---# Slack MessagingUse this skill to interact with Slack channels and messages: list channels, read conversation history, send messages, reply in threads, and add or remove reactions.## When to use- list channels in a Slack workspace- read recent messages in a channel- read thread replies- send a message to a channel or DM- reply to a thread- add or remove emoji reactions## AuthenticationThis skill uses the connected `slack` provider credential for the current agent.## InvocationAll actions are called through Shift's Skill Router:```bashcurl -X POST "$SHIFT_LOCAL_GATEWAY/skill-router/invoke" \ -H "Content-Type: application/json" \ -d '{ "skillProvider": "slack", "skill": "messaging", "action": "list-channels", "input": { "limit": 20 } }'```## ExamplesList channels:```json{ "skillProvider": "slack", "skill": "messaging", "action": "list-channels", "input": { "types": "public_channel,private_channel", "limit": 20 }}```Get channel info:```json{ "skillProvider": "slack", "skill": "messaging", "action": "get-channel", "input": { "channel": "C1234567890" }}```List messages in a channel:```json{ "skillProvider": "slack", "skill": "messaging", "action": "list-messages", "input": { "channel": "C1234567890", "limit": 20 }}```Get thread replies:```json{ "skillProvider": "slack", "skill": "messaging", "action": "get-thread", "input": { "channel": "C1234567890", "ts": "1234567890.123456" }}```Send a message:```json{ "skillProvider": "slack", "skill": "messaging", "action": "send", "input": { "channel": "C1234567890", "text": "Hello from Shift!" }}```Reply in a thread:```json{ "skillProvider": "slack", "skill": "messaging", "action": "send", "input": { "channel": "C1234567890", "text": "This is a thread reply.", "threadTs": "1234567890.123456" }}```Add a reaction:```json{ "skillProvider": "slack", "skill": "messaging", "action": "react", "input": { "channel": "C1234567890", "timestamp": "1234567890.123456", "name": "thumbsup" }}```Remove a reaction:```json{ "skillProvider": "slack", "skill": "messaging", "action": "remove-react", "input": { "channel": "C1234567890", "timestamp": "1234567890.123456", "name": "thumbsup" }}```If the connection is missing, tell the user to configure Slack in Shift.

Frequently asked questions

Messaging