docs: add AG-UI Channels guide and Slack example (CopilotKit Channels SDK)

[mme]

Description

Adds an AG-UI Channels guide plus a runnable Slack example. The same Agno agent that serves an AG-UI frontend from AgentOS can also run as a bot in Slack and other messaging platforms through the CopilotKit Channels SDK: the AgentOS server stays unchanged, and a separate Node channel process — connected through CopilotKit Intelligence, which holds the platform credentials — drives the agent through AgnoAgent from @ag-ui/agno.

Changes:

• New agent-os/interfaces/ag-ui/channels.mdx guide (how it fits together, Slack steps, other platforms, production note).
• New examples/agent-os/interfaces/agui/slack-channel.mdx runnable example.
• docs.json navigation entries for both, an AG-UI group, and a row in the AG-UI examples overview table.
• Cross-link from the AG-UI introduction.

Type of Change

• New content

Related Issues/PRs (if applicable)

N/A

Checklist

• Content is accurate and up-to-date
• All links tested and working
• Code examples verified (if applicable)
• Spelling and grammar checked
• Screenshots updated (if applicable)

Code verification: the TypeScript snippets typecheck against the published @copilotkit/channels, @copilotkit/runtime, and @ag-ui/agno packages; the AgentOS snippet and /agui endpoint match the existing AG-UI introduction. docs.json validated as JSON.

[Himanshu040604]

Thanks for this @mme
We ran the whole page end to end in a real Slack workspace against a live AgentOS, and it works.
few things which can be cleaned up are mentioned below

[Himanshu040604]

I pasted the dashboard's actual ID field (channel_…) and the SDK rejected it: it requires a lowercase kebab case channelName. The working value is the channel's Code. Rename the env var to CHANNEL_CODE (matching the CopilotKit docs), also in the slack-channel.mdx

[Himanshu040604]

API keys are project scoped , I first used a key from a different project and got a silently dead bot (channel_not_declared, no error anywhere). One line here saying "create the key in the same project as the Channel" would be a good thing to add

[Himanshu040604]

The sample agent has no memory a threaded follow ups gets no context because basic.py sets neither db= nor add_history_to_context=True, which undercuts the page's own subscribe flow (in thread it works but bot forgets the previous message in different thread). Adding this will fixes it.

[Himanshu040604]

The install as written doesn't typecheck the plain npm install today pulls two different @ag-ui/client copies (via @ag-ui/agno peer vs @copilotkit/channels-core pin) and tsc fails with TS2322 on the agent: field in channel.ts. The CopilotKit agno starter pins exact versions and carries an @ag-ui/* overrides block worth pinning here too.

[Himanshu040604]

in here there it says other platforms (Teams, Discord, WhatsApp, Telegram) connect the same easy way as Slack. But CopilotKit's own docs say only Slack works this way today, the others need extra setup on your side. Can you please update this line there

[Himanshu040604]

two small things:

• When you start channel.ts, it prints nothing you can't tell if it connected or not. please add a line that prints the connection status.
• when the agent uses a tool, slack shows nothing about it by default. Mention the showToolStatus option