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COMMSCOLLAB
Velocity7.5

Business communication and collaboration platform

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Slack is quietly rebuilding itself as a runtime for third-party agents.

agentsmcpdeveloper-platformblock-kitmessaging
◆Current state
Slack's developer platform has shifted its center of gravity from bots-that-reply to agents-that-act. The last month is dominated by agent primitives: apps can now receive the context a user is looking at, Slackbot can call external tools over MCP, and a dedicated agent messaging surface ships alongside steady CLI and Block Kit work.
◆Where it's heading
Each release fills in a piece of an agent platform — context in, tools out, and a native place for agents to converse. Block Kit is gaining richer primitives (containers, data visualization) that read as the display layer for agent output. Three CLI releases in a month show the tooling keeping pace with the expanding surface.
◆Prediction
Expect the next moves to connect these pieces: agent context feeding MCP tool calls, and Block Kit's new blocks becoming the standard way agents render results in-channel.

◆Recent moves

  1. 7d ago

    Agent context has landed

    ⚡ SPARK

    The clearest signal yet of Slack's agent-platform turn: apps stop guessing at what a user means and instead receive the channel, DM, thread, canvas, or list they currently have open.

    View source ↗
  2. 9d ago

    Release: Python Slack SDK v3.43.0

    View source ↗
  3. 9d ago

    Introducing the Agent messaging experience

    A new manifest-set messaging mode lets developers control how their agent presents in conversation — an incremental but on-theme addition to the agent surface.

    View source ↗
  4. 9d ago

    Release: Slack CLI v4.4.0

    A routine CLI point release with no detailed notes, part of the steady tooling cadence supporting the agent-platform build-out.

    View source ↗
  5. 10d ago

    New Block Kit container block

    A new container primitive for Block Kit; small on its own, but part of a richer display layer — alongside the data-visualization block — that agent output will increasingly lean on.

    View source ↗
  6. 21d ago

    Announcing the Slackbot MCP Client

    ⚡ SPARK

    Slackbot gains an MCP client that lets it call external tools — the 'tools out' half of Slack's agent platform, paired with the 'context in' of agent context.

    View source ↗