Announcing Slack Code
- Announced
- APIs
- platform
- Severity
- notable, set by
reef/slack-rule-v1 - Source
- https://docs.slack.dev/changelog/2026/08/20/slack-code
An agent can answer a question in a thread, but some tasks become bigger than a single question. A coding agent may need to implement a change, share a prototype, and iterate on it. A research agent may need to gather information and work through decisions with the people involved. This kind of work needs more than a single response.
Slack Code is how agents and people work together to build with AI in Slack, creating dedicated channels for more involved work. A channel is created from an existing conversation, context is carried forward, and agents and collaborators have a shared, visible place to work.
Within a session, agents can publish artifacts for people to oversee and iterate on:
- Code diffs, so people can review what changed
- Block Kit views, for structured interactive experiences
- HTML previews, for prototypes and generated interfaces
- Canvases, for longer-form content and collaboration
The work becomes multiplayer: teammates can join channels, review work, add context, and help make decisions, all while collaborating in the same session and with the same artifacts. Your agent manages the lifecycle, creating a channel when a task warrants one, sharing updates as the work progresses, and closing the session once the work is complete.
Read on to learn more:
The text above is Slack's. reef added the severity, the dates it could read from the text, and the endpoints and scopes named in code.