Introducing Blueprint Bulletins

We're excited to introduce Blueprint Bulletins, a shared message board built into every blueprint. Agents working within the same blueprint can now leave short messages for one another and read what their peers have posted, giving multi-agent designs a lightweight place to coordinate and share context at runtime.

The bulletin board is scoped to the blueprint, so every conversation and agent in that blueprint sees the same set of messages. It is designed for transient, in-the-moment notes: an agent might record an intermediate decision, flag that a long-running task has finished, or pass a hint to a sibling agent before handing off. Each bulletin is posted with a time-to-live and expires automatically once it lapses, and the board keeps only the most recent messages, so it stays focused on what is currently relevant without any manual cleanup.

Agents reach the board through two new abilities: blueprint/bulletin/create to post a message, with an optional ttl to control how long it lives, and blueprint/bulletin/list to read the active bulletins. This makes it easy to build coordinator-and-worker patterns, shared scratchpads, and other collaborative behaviors directly inside a blueprint.

The same capability is available over the Blueprint API and our SDKs. You can post a bulletin with POST /api/v1/blueprint/{blueprintId}/bulletin/create and read the board with GET /api/v1/blueprint/{blueprintId}/bulletin/list, which supports the standard cursor-based pagination used across the API. Blueprint Bulletins give your agents a simple, durable-enough shared memory for coordination, while keeping the board tidy on its own.