Provision an inbox before the user finishes signup
Product pattern: every workspace or agent gets a mailbox during onboarding—with idempotent create so retries stay safe.
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If your product includes AI agents that must talk to the outside world, the mailbox should exist before the user finishes celebrating signup. Waiting until the first bounced workflow teaches users that email is an optional integration. It is not. It is part of the agent’s identity, as foundational as the agent id itself.
Make the mailbox part of onboarding
When a workspace or agent is created, call Agent Inbox to provision an address. Show the address in the empty state: “Vendors can email this.” Store the inbox id next to the agent id in your database. Bind the Neuro OS role—or your runtime equivalent—to that inbox before the first skill runs so the first inbound message has somewhere governed to land.
Users who see a real address on day zero understand the product surface. Users who only see a chat box assume email is someone else’s problem and will paste secrets into the chat instead.
Idempotent create
Signup flows retry. Webhooks duplicate. Mobile clients double-submit. Inbox creation must be idempotent on a stable key such as workspace_id + agent_id. A second create returns the same inbox instead of minting a twin. Emit an audit event either way. Never leave the app in a state where the UI shows an address that the API cannot resolve, or where two agents share an address by accident after a race.
On failure, surface a recoverable error and a support path. Do not silently fall back to the founder’s Gmail, a shared alias, or “we will email you the address later.”
Forwarding and Ask from the first hour
Default outbound to Ask even for new workspaces. Provide a forwarding target for human owners so early mistakes escalate cleanly. As the workspace matures, they can tune Allow lists. Starting strict is cheaper than cleaning reputation later, and it teaches users the approval model before volume arrives.
Architecture sketch
App backend owns the customer record. Agent Inbox owns the mail data plane. Neuro OS owns role definitions, sandboxes, and connector policy when you run the agent there. Your signup orchestrator is the only component allowed to create inboxes, using a server-side key. Clients never hold the provisioning secret. Preview and production environments get separate identities.
Test the path end-to-end in CI: signup → inbox id persisted → test message received → agent classifies → Ask on outbound. That test is part of product quality, not an afterthought for the email team. Include a failure injection case for the create API so the UI fails closed.
Provision early, create idempotently, and treat the address as a first-class user-visible asset. The agent is not fully born until the world can reply to it.
Empty-state education
The empty state should teach the user what to do with the address: forward a vendor email, send a test message, or invite a teammate as the Ask approver. Without that guidance, users ignore the mailbox until an incident forces a retrofit. Productize the first successful receive event the same way you productize the first successful login.
Agent Inbox gives each role a mailbox people can reply to, with forwarding into Neuro OS when a human must see the thread. Outbound mail defaults to Ask. Run the role on Neuro OS. To scope the first inbox, get started.