docs: add slack plugin install steps for coding agents

README.md

@@ -17,6 +17,46 @@ This repo contains the same app built with three different AI agent frameworks.
 
 All implementations share the same Slack listener layer and the same user experience. The only difference is how the agent is defined and executed under the hood.
 
+## Claude Code, Codex, Cursor, and Other Coding Agents
+
+Install the [Slack MCP and Skills Plugin](https://docs.slack.dev/ai/slack-skills-plugin/) so your coding agent can create, run, and deploy Slack apps, look up Web API methods and scopes, and build Block Kit without guessing.
+
+### Claude Code
+
+Run this in a Claude Code session:
+
+```
+/plugin install slack@claude-plugins-official
+```
+
+### Codex
+
+Run this in your terminal:
+
+```sh
+codex plugin marketplace add slackapi/slack-skills-plugin
+codex plugin add slack@slack
+```
+
+### Cursor
+
+Run this in a Cursor Agent chat:
+
+```
+/add-plugin slack
+```
+
+### Other agents
+
+Install the skills with `npx skills`, using your [agent's identifier](https://github.com/vercel-labs/skills#supported-agents):
+
+```sh
+npx skills add slackapi/slack-skills-plugin -y -a <agent>
+
+# For example, OpenCode
+npx skills add slackapi/slack-skills-plugin -y -a opencode
+```
+
 ## What It Can Do
 
 The coding agent interacts with users through four entry points:

claude-agent-sdk/README.md

@@ -68,6 +68,46 @@ Before getting started, make sure you have a development workspace where you hav
 
 Join the [Slack Developer Program](https://api.slack.com/developer-program) for exclusive access to sandbox environments for building and testing your apps, tooling, and resources created to help you build and grow.
 
+### Claude Code, Codex, Cursor, and Other Coding Agents
+
+Install the [Slack MCP and Skills Plugin](https://docs.slack.dev/ai/slack-skills-plugin/) so your coding agent can create, run, and deploy Slack apps, look up Web API methods and scopes, and build Block Kit without guessing.
+
+#### Claude Code
+
+Run this in a Claude Code session:
+
+```
+/plugin install slack@claude-plugins-official
+```
+
+#### Codex
+
+Run this in your terminal:
+
+```sh
+codex plugin marketplace add slackapi/slack-skills-plugin
+codex plugin add slack@slack
+```
+
+#### Cursor
+
+Run this in a Cursor Agent chat:
+
+```
+/add-plugin slack
+```
+
+#### Other agents
+
+Install the skills with `npx skills`, using your [agent's identifier](https://github.com/vercel-labs/skills#supported-agents):
+
+```sh
+npx skills add slackapi/slack-skills-plugin -y -a <agent>
+
+# For example, OpenCode
+npx skills add slackapi/slack-skills-plugin -y -a opencode
+```
+
 ### Create the Slack app
 
 <details><summary><strong>Using Slack CLI</strong></summary>

openai-agents-sdk/README.md

@@ -66,6 +66,46 @@ Before getting started, make sure you have a development workspace where you hav
 
 Join the [Slack Developer Program](https://api.slack.com/developer-program) for exclusive access to sandbox environments for building and testing your apps, tooling, and resources created to help you build and grow.
 
+### Claude Code, Codex, Cursor, and Other Coding Agents
+
+Install the [Slack MCP and Skills Plugin](https://docs.slack.dev/ai/slack-skills-plugin/) so your coding agent can create, run, and deploy Slack apps, look up Web API methods and scopes, and build Block Kit without guessing.
+
+#### Claude Code
+
+Run this in a Claude Code session:
+
+```
+/plugin install slack@claude-plugins-official
+```
+
+#### Codex
+
+Run this in your terminal:
+
+```sh
+codex plugin marketplace add slackapi/slack-skills-plugin
+codex plugin add slack@slack
+```
+
+#### Cursor
+
+Run this in a Cursor Agent chat:
+
+```
+/add-plugin slack
+```
+
+#### Other agents
+
+Install the skills with `npx skills`, using your [agent's identifier](https://github.com/vercel-labs/skills#supported-agents):
+
+```sh
+npx skills add slackapi/slack-skills-plugin -y -a <agent>
+
+# For example, OpenCode
+npx skills add slackapi/slack-skills-plugin -y -a opencode
+```
+
 ### Create the Slack app
 
 <details><summary><strong>Using Slack CLI</strong></summary>

pydantic-ai/README.md

@@ -66,6 +66,46 @@ Before getting started, make sure you have a development workspace where you hav
 
 Join the [Slack Developer Program](https://api.slack.com/developer-program) for exclusive access to sandbox environments for building and testing your apps, tooling, and resources created to help you build and grow.
 
+### Claude Code, Codex, Cursor, and Other Coding Agents
+
+Install the [Slack MCP and Skills Plugin](https://docs.slack.dev/ai/slack-skills-plugin/) so your coding agent can create, run, and deploy Slack apps, look up Web API methods and scopes, and build Block Kit without guessing.
+
+#### Claude Code
+
+Run this in a Claude Code session:
+
+```
+/plugin install slack@claude-plugins-official
+```
+
+#### Codex
+
+Run this in your terminal:
+
+```sh
+codex plugin marketplace add slackapi/slack-skills-plugin
+codex plugin add slack@slack
+```
+
+#### Cursor
+
+Run this in a Cursor Agent chat:
+
+```
+/add-plugin slack
+```
+
+#### Other agents
+
+Install the skills with `npx skills`, using your [agent's identifier](https://github.com/vercel-labs/skills#supported-agents):
+
+```sh
+npx skills add slackapi/slack-skills-plugin -y -a <agent>
+
+# For example, OpenCode
+npx skills add slackapi/slack-skills-plugin -y -a opencode
+```
+
 ### Create the Slack app
 
 <details><summary><strong>Using Slack CLI</strong></summary>