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COMMSCOLLAB
Velocity6.3

Business communication and collaboration platform

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Slack now hosts any A2A agent without Slack-specific code.

agentsa2amcpslackbot-skillsdeveloper-platform
◆Current state
Slack's developer channel is almost all agent plumbing. On 10 November Slack became an A2A (Agent2Agent) client: a team hosts its own agent, publishes an Agent Card, and Slack calls it when people talk to it, with no request URL, event handling or Slack-specific logic. This follows Slackbot skills managed through Web API methods, a Slack CLI that points coding agents to the Slack MCP server, and a new requirement that Work Objects embeds allow the slack-mcps.com frame ancestor.
◆Where it's heading
Slack is lowering the cost of putting outside agents in front of its users: first skills as code, then MCP pointers for coding agents, now a standard protocol in place of the Slack app model for agents. The platform is positioning itself as the place where agents built anywhere meet the people who use them.
◆Prediction
Expect more A2A follow-ups, such as agents appearing in Slackbot or skills surfaces and richer Agent Card features, given how fast the agent releases have stacked up since October.

◆Recent moves

  1. 4d ago

    Bring your A2A agents to Slack

    ⚡ SPARK

    Slack takes the agent push past its own APIs: any agent that speaks the A2A protocol can be brought in by publishing an Agent Card. It is the clearest step yet in the October-November run of agent plumbing.

    View source ↗
  2. 8d ago

    Work Objects embeds require the slack-mcps.com frame ancestor

    Work Objects embed pages must now allow https://slack-mcps.com as a frame ancestor. A required config change for developers, and a sign that Slack's MCP surface now renders the same embeds as the client.

    View source ↗
  3. 10d ago

    Slack CLI 4.13 tells coding agents about Slack MCP and Skills

    After four CLI releases with no notes, 4.13.0 has a clear purpose: coding agents that run slack --help now learn about the Slack MCP server and Skills Plugin. It ties the CLI into the agent tooling Slack shipped in October.

    View source ↗
  4. 10d ago

    Slack Skills Plugin installs in Claude Code from its own marketplace

    Slack Skills Plugin releases can now be installed in Claude Code straight from the plugin's own marketplace as each version ships. A distribution tweak for an existing developer plugin, not a new capability.

    View source ↗
  5. 12d ago

    Updated low-usage submission criteria for Slack Marketplace apps

    Slack will no longer review Slack Marketplace submissions from apps that meet new low-usage criteria. It is a gatekeeping change for developers listing apps, tightening which apps get reviewer time; the entry's text cuts off before the criteria themselves.

    View source ↗
  6. 15d ago

    Slack CLI 4.12.0, the fourth CLI release in October

    The fourth Slack CLI release in October, again published with no description of what changed. Cadence on the tooling side is high; the content is not visible.

    View source ↗