Bret Taylor's Sierra moves enterprise agents into Slack with proactive Ghostwriter

ZackRW · x · 2026-09-29

Bret Taylor, Sierra's co-founder and former OpenAI chairman, detailed how managing agents on the Sierra platform has evolved from a web console to working with Ghostwriter inside Slack. The agent can proactively @-mention users when it spots an issue, and even suggests A/B tests the team hadn't considered — which Taylor says changes how enterprise software should work. No further technical details in the post.

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