docs: Add local Slack development setup guide

[inkeep]

Summary

Adds a new documentation page for setting up a local Slack development environment using Socket Mode.

Changes

• New file: agents-docs/content/talk-to-your-agents/slack/local-development.mdx

  • Covers Socket Mode setup for local development (no tunneling needed)
  • Documents the pnpm setup-slack-dev automated script (recommended)
  • Includes manual setup steps as an alternative
  • Provides verification and troubleshooting guidance
  • Explains why each developer needs their own app (event distribution)

• Updated: agents-docs/content/talk-to-your-agents/slack/meta.json

  • Added local-development to sidebar navigation after installation

Context

This documentation was requested via Slack by @miles. The content is based on the technical README at packages/agents-work-apps/src/slack/README.md, transformed into user-facing developer documentation.

Target Audience

Developers contributing to or testing the Slack integration locally—not workspace admins deploying to production.

[changeset-bot]

⚠️ No Changeset found

Latest commit: f5ca22e

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
agents-api	Ready	Preview, Comment	Feb 19, 2026 11:07pm
agents-docs	Error		Feb 19, 2026 11:07pm
agents-manage-ui	Ready	Preview, Comment	Feb 19, 2026 11:07pm